F. Kurniawan, J. Sumantyo, K. Ito, S. Gao, G. F. Panggabean, G. Prabowo
This paper presents a novel Circularly Polarized (CP) microstrip array antenna with circular shape and slotted by an elliptical ring for X-band communication. This array antenna consists of 4 paths. Each patch is designed with a unique model, and the purposed antenna is mainly circular-shaped. An elliptical ring slot is set at the center of the circular-shaped patch. And a pair of triangle shapes employed as truncation factor is placed at the edge of the circular-shaped antenna. This microstrip array antenna is developed by 2 × 2 patches in a sequential rotation mode with relative phases 0˚, 90˚, 180˚ and 270˚. Total dimension of this array antenna is 60.92 mm × 60.92 mm. The simulated result shows a good agreement with minimum requirement. The center frequency of the antenna design is 8.2 GHz with low-frequency at 8 GHz and high frequency at 8.4 GHz. The proposed antenna produced under -10 dB S11 of 21.9%, maximum gain of 12.47 dBic at the center frequency, and axial ratio bandwidth obtained 12.2%. Simulated result has been validated by fabrication and measurement, then the structure of the antenna design is fabricated on NPC-H22A with a thickness of 1.6 mm and dielectric constant of 2.17. Complete investigation and experimentation are presented in the next sections.
{"title":"CIRCULARLY POLARIZED ARRAY ANTENNA USING THE SEQUENTIAL ROTATION NETWORK FEEDING FOR X-BAND COMMUNICATION","authors":"F. Kurniawan, J. Sumantyo, K. Ito, S. Gao, G. F. Panggabean, G. Prabowo","doi":"10.2528/PIERC19051703","DOIUrl":"https://doi.org/10.2528/PIERC19051703","url":null,"abstract":"This paper presents a novel Circularly Polarized (CP) microstrip array antenna with circular shape and slotted by an elliptical ring for X-band communication. This array antenna consists of 4 paths. Each patch is designed with a unique model, and the purposed antenna is mainly circular-shaped. An elliptical ring slot is set at the center of the circular-shaped patch. And a pair of triangle shapes employed as truncation factor is placed at the edge of the circular-shaped antenna. This microstrip array antenna is developed by 2 × 2 patches in a sequential rotation mode with relative phases 0˚, 90˚, 180˚ and 270˚. Total dimension of this array antenna is 60.92 mm × 60.92 mm. The simulated result shows a good agreement with minimum requirement. The center frequency of the antenna design is 8.2 GHz with low-frequency at 8 GHz and high frequency at 8.4 GHz. The proposed antenna produced under -10 dB S11 of 21.9%, maximum gain of 12.47 dBic at the center frequency, and axial ratio bandwidth obtained 12.2%. Simulated result has been validated by fabrication and measurement, then the structure of the antenna design is fabricated on NPC-H22A with a thickness of 1.6 mm and dielectric constant of 2.17. Complete investigation and experimentation are presented in the next sections.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC19051703","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46832838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In order to design differential phase shifters (DPS) from metamaterial-based transmission lines, research had a long tradition of using balanced transmission lines which are a particular case of metamaterials, specifically characterized by a simplified equivalent circuit model. This paper presents an innovative way of designing DPS metamaterials by exploiting metamaterial properties more widely, using both balanced and unbalanced cases to obtain a broader set of solutions. These solutions are acquired through the dedicated method this paper expounds, and conceived with the help of a new use of metamaterials. For the sake of ensuring time efficiency and implementation easiness of this design method for industrial purpose, the full wave parametric optimization is reduced to its minimum by exploiting as much as possible in analytic parametric study. This method is illustrated by an application of 180 • DPS on C-Band (5-6 GHz). Three prototypes were fabricated, and the measurements show that the best case of DPS has less than 9 • of phase error over the targeted 20% bandwidth, with a return loss less than −14 dB and insertion losses lower than 1 dB.
{"title":"UNBALANCED METAMATERIALS APPLIED TO PHASE SHIFTER: DEDICATED DESIGN METHOD AND APPLICATION IN C-BAND","authors":"Jonathan Vivos, T. Crepin, M. Foulon, J. Sokoloff","doi":"10.2528/PIERC19021302","DOIUrl":"https://doi.org/10.2528/PIERC19021302","url":null,"abstract":"In order to design differential phase shifters (DPS) from metamaterial-based transmission lines, research had a long tradition of using balanced transmission lines which are a particular case of metamaterials, specifically characterized by a simplified equivalent circuit model. This paper presents an innovative way of designing DPS metamaterials by exploiting metamaterial properties more widely, using both balanced and unbalanced cases to obtain a broader set of solutions. These solutions are acquired through the dedicated method this paper expounds, and conceived with the help of a new use of metamaterials. For the sake of ensuring time efficiency and implementation easiness of this design method for industrial purpose, the full wave parametric optimization is reduced to its minimum by exploiting as much as possible in analytic parametric study. This method is illustrated by an application of 180 • DPS on C-Band (5-6 GHz). Three prototypes were fabricated, and the measurements show that the best case of DPS has less than 9 • of phase error over the targeted 20% bandwidth, with a return loss less than −14 dB and insertion losses lower than 1 dB.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC19021302","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45666037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A wideband high gain circularly polarized layered cylindrical dielectric resonator antenna (DRA) that operates in a higher order mode is proposed in the X-band frequency range. The antenna consists of two dielectric layers having different dielectric constants and radii. The results demonstrate a considerably improved performance as a result of adding the outer dielectric layer, where wider impedance and axial ratio bandwidths have been attained in conjunction with a higher broadside gain of ~ 14 dBic. A prototype has been built and measured with close agreement between experimental and simulated results.
{"title":"HIGHER ORDER MODE LAYERED CYLINDRICAL DIELECTRIC RESONATOR ANTENNA","authors":"Abdulmajid A. Abdulmajid, S. Khamas","doi":"10.2528/PIERC18112808","DOIUrl":"https://doi.org/10.2528/PIERC18112808","url":null,"abstract":"A wideband high gain circularly polarized layered cylindrical dielectric resonator antenna (DRA) that operates in a higher order mode is proposed in the X-band frequency range. The antenna consists of two dielectric layers having different dielectric constants and radii. The results demonstrate a considerably improved performance as a result of adding the outer dielectric layer, where wider impedance and axial ratio bandwidths have been attained in conjunction with a higher broadside gain of ~ 14 dBic. A prototype has been built and measured with close agreement between experimental and simulated results.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC18112808","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46607295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Alibakhshikenari, M. Khalily, B. Virdee, Abdul Ali, Pancham Shukla, C. See, R. Abd‐Alhameed, F. Falcone, E. Limiti
Proof-of-concept is presented of a novel slot antenna structure with two excitation ports. Although this antenna provides a wide impedance bandwidth however its peak gain and optimum radiation efficiency is observed at its mid-band operational frequency. The antenna structure is etched on the top side of a dielectric substrate with a ground-plane. The antenna essentially consists of a rectangular patch with two dielectric slots in which are loaded multiple coupled patch arms embedded with H-shaped slits. The two dielectric slots are isolated from each other with a large H-shaped slit. The radiation characteristics of the proposed antenna in terms of impedance bandwidth, gain and efficiency can be significantly improved by simply increasing the number of radiation arms and modifying their dimensions. The antenna’s performance was verified by building and testing three prototype antennas. The final optimized antenna exhibits a fractional bandwidth of 171% (0.5–6.4 GHz) with a peak gain and maximum radiation efficiency of 5.3 dBi and 75% at 4.4 GHz, respectively. The antenna has physical dimensions of 27×37×1.6 mm3 corresponding to electrical size of 0.0450λo×0.0610λo×0.0020λo, where λo is free-space wavelength at 0.5 GHz. The antenna is compatible for integration in handsets and other broadband wireless systems that operate over L-, S-, and C-bands.
{"title":"DOUBLE-PORT SLOTTED-ANTENNA WITH MULTIPLE MINIATURIZED RADIATORS FOR WIDEBAND WIRELESS COMMUNICATION SYSTEMS AND PORTABLE DEVICES","authors":"M. Alibakhshikenari, M. Khalily, B. Virdee, Abdul Ali, Pancham Shukla, C. See, R. Abd‐Alhameed, F. Falcone, E. Limiti","doi":"10.2528/PIERC18011204","DOIUrl":"https://doi.org/10.2528/PIERC18011204","url":null,"abstract":"Proof-of-concept is presented of a novel slot antenna structure with two excitation ports. Although this antenna provides a wide impedance bandwidth however its peak gain and optimum radiation efficiency is observed at its mid-band operational frequency. The antenna structure is etched on the top side of a dielectric substrate with a ground-plane. The antenna essentially consists of a rectangular patch with two dielectric slots in which are loaded multiple coupled patch arms embedded with H-shaped slits. The two dielectric slots are isolated from each other with a large H-shaped slit. The radiation characteristics of the proposed antenna in terms of impedance bandwidth, gain and efficiency can be significantly improved by simply increasing the number of radiation arms and modifying their dimensions. The antenna’s performance was verified by building and testing three prototype antennas. The final optimized antenna exhibits a fractional bandwidth of 171% (0.5–6.4 GHz) with a peak gain and maximum radiation efficiency of 5.3 dBi and 75% at 4.4 GHz, respectively. The antenna has physical dimensions of 27×37×1.6 mm3 corresponding to electrical size of 0.0450λo×0.0610λo×0.0020λo, where λo is free-space wavelength at 0.5 GHz. The antenna is compatible for integration in handsets and other broadband wireless systems that operate over L-, S-, and C-bands.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC18011204","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47529003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Metasheets are ultra-thin sheets built from sub-wavelength resonators designed in order to achieve certain frequency-dependent transmission behaviour. A semi-analytical approach based on an equivalent circuit representation is proposed to calculate the microwave transmission through metasheets which consist of 2D periodic arrays of planar circular metal rings with and without substrate. The electromagnetic response of the metasheet can be controlled by changing the radius and the periodicity of the circular rings. In the semi-analytical approach, the equations for the impedances of the equivalent circuit are parametrized and fitted to match the values of transmission coefficients obtained by full-wave simulations at selected frequency points. Such an approach permits an optimization of the metasheet design with a very small number of full-wave numerical simulations. It is shown that the results of the semi-analytical approach match well with full-wave simulations and measurements within a reasonable range of radius and periodicity values.
{"title":"A Semi-Analytical Approach for Fast Design of Microwave Metasheets with Circular Metal Rings on Dielectric Substrates","authors":"Ezgi Özis, A. Osipov, T. Eibert","doi":"10.2528/PIERC18070404","DOIUrl":"https://doi.org/10.2528/PIERC18070404","url":null,"abstract":"Metasheets are ultra-thin sheets built from sub-wavelength resonators designed in order to achieve certain frequency-dependent transmission behaviour. A semi-analytical approach based on an equivalent circuit representation is proposed to calculate the microwave transmission through metasheets which consist of 2D periodic arrays of planar circular metal rings with and without substrate. The \u0000electromagnetic response of the metasheet can be controlled by changing the radius and the periodicity of the circular rings. In the semi-analytical approach, the equations for the impedances of the equivalent circuit are parametrized and fitted to match the values of transmission coefficients obtained by full-wave \u0000simulations at selected frequency points. Such an approach permits an optimization of the metasheet design with a very small number of full-wave numerical simulations. It is shown that the results of the semi-analytical approach match well with full-wave simulations and measurements within a reasonable range of radius and periodicity values.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44168648","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A new compact topology of rectenna, which combines a miniaturized wideband printed antenna and a rectifier integrated on the radiating surface, is reported in this paper. The rectenna is designed for ISM 900 MHz band and applied to wireless power transmission and energy harvesting to supply Ultra-Wideband tags for 3D indoor localization. The rectenna allows activating a DC-DC boost converter that supplies power to the tags. It exhibits a minimum conversion efficiency of 25% for very low microwave power densities (> 0.18 µW/cm 2) on the non-optimal loading impedance (of about 10 kΩ) of a commercial DC-to-DC boost converter and power management unit. The harvested DC voltage obtained from this novel rectenna exceeds 330 mV for microwave power density of 0.22 µW/cm 2. This measured DC voltage is in the range of the cold turn-on/start-up voltage of nowadays commercial off-the-shelf DC-to-DC boost converters and power management units. The proposed rectenna is also very compact, as its surface (11 × 6 cm 2) is of 0.05λ 2 at the operating frequency (860 MHz).
{"title":"Compact Flat Dipole Rectenna for IoT Applications","authors":"A. Okba, A. Takacs, H. Aubert","doi":"10.2528/PIERC18071604","DOIUrl":"https://doi.org/10.2528/PIERC18071604","url":null,"abstract":"A new compact topology of rectenna, which combines a miniaturized wideband printed antenna and a rectifier integrated on the radiating surface, is reported in this paper. The rectenna is designed for ISM 900 MHz band and applied to wireless power transmission and energy harvesting to supply Ultra-Wideband tags for 3D indoor localization. The rectenna allows activating a DC-DC boost converter that supplies power to the tags. It exhibits a minimum conversion efficiency of 25% for very low microwave power densities (> 0.18 µW/cm 2) on the non-optimal loading impedance (of about 10 kΩ) of a commercial DC-to-DC boost converter and power management unit. The harvested DC voltage obtained from this novel rectenna exceeds 330 mV for microwave power density of 0.22 µW/cm 2. This measured DC voltage is in the range of the cold turn-on/start-up voltage of nowadays commercial off-the-shelf DC-to-DC boost converters and power management units. The proposed rectenna is also very compact, as its surface (11 × 6 cm 2) is of 0.05λ 2 at the operating frequency (860 MHz).","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC18071604","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48155974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Solofo Razafimahatratra, J. Sarrazin, G. Valério, F. Sarrazin, M. Casaletti, P. D. Doncker, A. Benlarbi-Delai
This paper presents a theoretical approach to compare the performance of a directive and a quasi-omnidirectional on-body antennas. Two canonical antennas, namely, a dipole and a rectangular aperture, are considered in the 60 GHz band. We first demonstrate that for this on-body configuration, the classically-defined far-field antenna gain depends on the observation distance. Consequently, we derive results in terms of radiation efficiency and link budget. To do so, the antenna input impedance computation is a preliminary step to normalize the input power to allow a fair comparison between the two antennas. The impedance over a lossy half-plane of an aperture illuminated by a TE 10 mode normally polarized is therefore derived into a convenient easy-to-compute formulation, which to authors' best knowledge, is not available in the literature. In terms of link budget, it is obtained that the received power due to an aperture is generally higher than the one due to the dipole in the main lobe direction. A constant difference is observed along the distance and this difference increases with the aperture width for antennas touching the body. Besides, it is shown that the standard aperture waveguide WR15 exhibits a slightly higher efficiency than a vertical dipole with the same vertical size when placed at a distance less than 3 mm (i.e., 0.6 λ) from the body phantom surface. Above this distance, both the dipole and the aperture exhibit similar efficiency in the order of 60 %.
{"title":"Input Impedance of an Aperture Over a Lossy Half-Space: Application to on-Body Antenna Performance at 60 GHz","authors":"Solofo Razafimahatratra, J. Sarrazin, G. Valério, F. Sarrazin, M. Casaletti, P. D. Doncker, A. Benlarbi-Delai","doi":"10.2528/PIERC17090104","DOIUrl":"https://doi.org/10.2528/PIERC17090104","url":null,"abstract":"This paper presents a theoretical approach to compare the performance of a directive and a quasi-omnidirectional on-body antennas. Two canonical antennas, namely, a dipole and a rectangular aperture, are considered in the 60 GHz band. We first demonstrate that for this on-body configuration, the classically-defined far-field antenna gain depends on the observation distance. Consequently, we derive results in terms of radiation efficiency and link budget. To do so, the antenna input impedance computation is a preliminary step to normalize the input power to allow a fair comparison between the two antennas. The impedance over a lossy half-plane of an aperture illuminated by a TE 10 mode normally polarized is therefore derived into a convenient easy-to-compute formulation, which to authors' best knowledge, is not available in the literature. In terms of link budget, it is obtained that the received power due to an aperture is generally higher than the one due to the dipole in the main lobe direction. A constant difference is observed along the distance and this difference increases with the aperture width for antennas touching the body. Besides, it is shown that the standard aperture waveguide WR15 exhibits a slightly higher efficiency than a vertical dipole with the same vertical size when placed at a distance less than 3 mm (i.e., 0.6 λ) from the body phantom surface. Above this distance, both the dipole and the aperture exhibit similar efficiency in the order of 60 %.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC17090104","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43941574","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
F. Nashad, S. Foti, David Smith, M. Elsdon, O. Yurduseven
A new structure design of a dual-band suspended microstrip meshed patch antenna integrated with a polycrystalline silicon solar cell for Ku-band satellite applications is proposed and presented. This antenna element is a basic building block for a Ku-band meshed array antenna used for two-way satellite internet and TV applications at rural and remote locations. The antenna covers the operating frequency range from 11.7GHz to 12.22 GHz downlink band and from 14.0GHz to 14.5GHz uplink band allocated by the ITU to the Regions 1 and 2. While achieving 500MHz bandwidth across each band, fully covering the Ku-band uplink and downlink frequency bands, the antenna offers a single element gain of 6.05 dBi in the downlink band and 7.61 dBi in the uplink band. The antenna has been fabricated and measured, and good agreement is achieved between the experimental and simulated results. In addition, a good compromise between RF performance and optical transparency is obtained. The overall visible light transmission is found to be approximately 87%. A compact low-profile antenna element is also achieved.
{"title":"Ku-Band Suspended Meshed Patch Antenna Integrated with Solar Cells for Remote Area Applications","authors":"F. Nashad, S. Foti, David Smith, M. Elsdon, O. Yurduseven","doi":"10.2528/PIERC18020608","DOIUrl":"https://doi.org/10.2528/PIERC18020608","url":null,"abstract":"A new structure design of a dual-band suspended microstrip meshed patch antenna integrated with a polycrystalline silicon solar cell for Ku-band satellite applications is proposed and presented. This antenna element is a basic building block for a Ku-band meshed array antenna used for two-way satellite internet and TV applications at rural and remote locations. The antenna covers the operating frequency range from 11.7GHz to 12.22 GHz downlink band and from 14.0GHz to 14.5GHz uplink band allocated by the ITU to the Regions 1 and 2. While achieving 500MHz bandwidth across each band, fully covering the Ku-band uplink and downlink frequency bands, the antenna offers a single element gain of 6.05 dBi in the downlink band and 7.61 dBi in the uplink band. The antenna has been fabricated and measured, and good agreement is achieved between the experimental and simulated results. In addition, a good compromise between RF performance and optical transparency is obtained. The overall visible light transmission is found to be approximately 87%. A compact low-profile antenna element is also achieved.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC18020608","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42808405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
R. Selvaraju, M. Jamaluddin, M. R. Kamarudin, J. Nasir, M. H. Dahri
A square-shaped complementary split ring resonator (CSRR) filtering structure for isolation improvement is presented in this paper. The proposed research work investigates the design and development of a simple and compact CSRR structure. In order to verify the performance of the proposed filtering element and to improve the isolation among the closely placed antenna elements, arrays of configured CSRR structures are implemented between two antenna elements. An array of configured CSRR elements has been integrated with the printed antenna on the top and bottom layers. The proposed filtering elements offer an enhancement in isolation by 25 dB as compared to the simple array. The entire configuration has been simulated using the Ansoft HFSS simulator. Finally, the proposed design is fabricated and experimentally validated. In the experiment, coupling suppression of −51 dB at the operating frequency is successfully achieved, resulting in a recovery of the array pattern. The proposed antenna is highly efficient, which is suitable to be utilized for 5G communication.
{"title":"Complementary split ring resonator for isolation enhancement in 5G communication antenna array","authors":"R. Selvaraju, M. Jamaluddin, M. R. Kamarudin, J. Nasir, M. H. Dahri","doi":"10.2528/PIERC18011019","DOIUrl":"https://doi.org/10.2528/PIERC18011019","url":null,"abstract":"A square-shaped complementary split ring resonator (CSRR) filtering structure for isolation improvement is presented in this paper. The proposed research work investigates the design and development of a simple and compact CSRR structure. In order to verify the performance of the proposed filtering element and to improve the isolation among the closely placed antenna elements, arrays of configured CSRR structures are implemented between two antenna elements. An array of configured CSRR elements has been integrated with the printed antenna on the top and bottom layers. The proposed filtering elements offer an enhancement in isolation by 25 dB as compared to the simple array. The entire configuration has been simulated using the Ansoft HFSS simulator. Finally, the proposed design is fabricated and experimentally validated. In the experiment, coupling suppression of −51 dB at the operating frequency is successfully achieved, resulting in a recovery of the array pattern. The proposed antenna is highly efficient, which is suitable to be utilized for 5G communication.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC18011019","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47883902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
C. E. Santosa, J. Sumantyo, K. Urata, M. Chua, K. Ito, S. Gao
In this paper, a low-profile wide bandwidth circularly polarized microstrip antenna is proposed as element for a C-band airborne circularly polarized synthetic aperture radar sensor. Several bandwidth improvement techniques were proposed and implemented. In order to increase impedance bandwidth, the antenna is constructed using double-stacked substrate with low dielectric constant, modified radiating shape for multi-resonant frequency, and a circle-slotted parasitic patch. Generation of the circularly polarized wave employs a simple square patch with curve corner-truncation as radiating element. The asymmetric position of the feeding is attempted to improve the axial-ratio bandwidth. To avoid a complicated feed network, the antenna is fed by single-feed proximity-coupled microstrip line. The effect of copper-covering on the upper layer for decrease undesired radiation wave emitted by the feeding is also studied and presented. Measurement results show that the impedance bandwidth and axial ratio bandwidth are 20.9% (1,100 MHz) and 4.7% (250 MHz), respectively. Meanwhile the measured gain is 7 dBic at the frequency of 5.3 GHz.
{"title":"Development of a Low Profile Wide-Bandwidth Circularly Polarized Microstrip Antenna for C-Band Airborne CP-SAR Sensor","authors":"C. E. Santosa, J. Sumantyo, K. Urata, M. Chua, K. Ito, S. Gao","doi":"10.2528/PIERC17110901","DOIUrl":"https://doi.org/10.2528/PIERC17110901","url":null,"abstract":"In this paper, a low-profile wide bandwidth circularly polarized microstrip antenna is \u0000proposed as element for a C-band airborne circularly polarized synthetic aperture radar sensor. Several \u0000bandwidth improvement techniques were proposed and implemented. In order to increase impedance \u0000bandwidth, the antenna is constructed using double-stacked substrate with low dielectric constant, \u0000modified radiating shape for multi-resonant frequency, and a circle-slotted parasitic patch. Generation \u0000of the circularly polarized wave employs a simple square patch with curve corner-truncation as radiating \u0000element. The asymmetric position of the feeding is attempted to improve the axial-ratio bandwidth. \u0000To avoid a complicated feed network, the antenna is fed by single-feed proximity-coupled microstrip \u0000line. The effect of copper-covering on the upper layer for decrease undesired radiation wave emitted by \u0000the feeding is also studied and presented. Measurement results show that the impedance bandwidth \u0000and axial ratio bandwidth are 20.9% (1,100 MHz) and 4.7% (250 MHz), respectively. Meanwhile the \u0000measured gain is 7 dBic at the frequency of 5.3 GHz.","PeriodicalId":20699,"journal":{"name":"Progress in Electromagnetics Research C","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.2528/PIERC17110901","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41401271","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：