Pub Date : 2023-04-03DOI: 10.1080/02726343.2023.2209965
Mohammed El Amine Chaib, N. Cherif, M. Abri, H. Badaoui
ABSTRACT This paper demonstrates a novel configuration of half mode substrate integrated waveguide HMSIW bandpass selective filter based on Hilbert cells as DGS. Two 50-Ohm conventional micro-strip are used as feed lines. The filter is designed and optimized using CST Software, Where a parametric study is used to optimize its geometric parameters. In our design, six periodic Hilbert cells are used, which are work collectively with three transverse slots to generate the desired resonance frequency. The used dielectric substrate is FR4 with a relative permittivity of 4.3. The proposed filter operates at the frequency of 3.25 GHz with an insertion loss about of −2 dB and a rejection extended from 1 GHz to 3.2 GHz and from 3.4 GHz to 7 GHz respectively for the lower and the higher sides with a level more than −35 dB. The filter is fabricated and measured, where the obtained measurements show a clear crystal similarity with the simulated results. The proposed filter is considered for TD LTE applications.
{"title":"Miniaturized and optimized half mode SIW bandpass filter design integrating Hilbert cells as DGS","authors":"Mohammed El Amine Chaib, N. Cherif, M. Abri, H. Badaoui","doi":"10.1080/02726343.2023.2209965","DOIUrl":"https://doi.org/10.1080/02726343.2023.2209965","url":null,"abstract":"ABSTRACT This paper demonstrates a novel configuration of half mode substrate integrated waveguide HMSIW bandpass selective filter based on Hilbert cells as DGS. Two 50-Ohm conventional micro-strip are used as feed lines. The filter is designed and optimized using CST Software, Where a parametric study is used to optimize its geometric parameters. In our design, six periodic Hilbert cells are used, which are work collectively with three transverse slots to generate the desired resonance frequency. The used dielectric substrate is FR4 with a relative permittivity of 4.3. The proposed filter operates at the frequency of 3.25 GHz with an insertion loss about of −2 dB and a rejection extended from 1 GHz to 3.2 GHz and from 3.4 GHz to 7 GHz respectively for the lower and the higher sides with a level more than −35 dB. The filter is fabricated and measured, where the obtained measurements show a clear crystal similarity with the simulated results. The proposed filter is considered for TD LTE applications.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41893403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/02726343.2023.2206263
B. Lin, Wenzhun Huang, Jianxin Guo, Xiang Ji, Yan Zhou, Yunyan Wu
ABSTRACT In this study, a 2-bit coding metasurface is proposed, which can achieve ultra-wideband radar cross section (RCS) reduction under arbitrary polarized incidences due to phase cancellation. In the design process of the 2-dit coding metasurface, a novel polarization conversion metasurface (PCM) is proposed at first, which can realize ultra-wideband circular-polarization (CP) maintaining reflection; moreover, when its unit cell structure is rotated by an angle ψ, ±2ψ Pancharatnam-Berry (PB) phase will be generated in its co-polarized reflection coefficients under CP incidence. Thus, based on the PCM, an ultra-wideband 2-dit coding metasurface is conveniently proposed. Numerical simulations demonstrate that the coding metasurface has excellent RCS reduction performance. Compared with a pure metallic plate with the same size, its RCS can be reduced more than 10 dB under normal incidences with arbitrary polarizations in the ultra-wide frequency band of 6.9–33.1 GHz with a relative bandwidth of 131%. Moreover, when the incident angle is increased to 45°, the RCS reduction performance can be kept well. Finally, one laboratory sample of the coding metasurface is fabricated and measured, a reasonable agreement is observed between the measured and simulated results.
{"title":"Ultra-wideband radar cross-section reduction based on phase cancellation","authors":"B. Lin, Wenzhun Huang, Jianxin Guo, Xiang Ji, Yan Zhou, Yunyan Wu","doi":"10.1080/02726343.2023.2206263","DOIUrl":"https://doi.org/10.1080/02726343.2023.2206263","url":null,"abstract":"ABSTRACT In this study, a 2-bit coding metasurface is proposed, which can achieve ultra-wideband radar cross section (RCS) reduction under arbitrary polarized incidences due to phase cancellation. In the design process of the 2-dit coding metasurface, a novel polarization conversion metasurface (PCM) is proposed at first, which can realize ultra-wideband circular-polarization (CP) maintaining reflection; moreover, when its unit cell structure is rotated by an angle ψ, ±2ψ Pancharatnam-Berry (PB) phase will be generated in its co-polarized reflection coefficients under CP incidence. Thus, based on the PCM, an ultra-wideband 2-dit coding metasurface is conveniently proposed. Numerical simulations demonstrate that the coding metasurface has excellent RCS reduction performance. Compared with a pure metallic plate with the same size, its RCS can be reduced more than 10 dB under normal incidences with arbitrary polarizations in the ultra-wide frequency band of 6.9–33.1 GHz with a relative bandwidth of 131%. Moreover, when the incident angle is increased to 45°, the RCS reduction performance can be kept well. Finally, one laboratory sample of the coding metasurface is fabricated and measured, a reasonable agreement is observed between the measured and simulated results.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46399534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/02726343.2023.2206267
Dong Yang, Lichao Hao, ZhenHua Cao, W. Dai
ABSTRACT A novel broadband circularly polarized square-slot antenna with parasitic elements is presented in this article. The proposed antenna with dimensions of 77.6 × 77.6 × 1.6 mm3 is composed of a L-shaped strip, a pair of rectangular slots, a L-shaped branch, and an inverted L-shaped feeding line. First, a pair of rectangular slots are used to excite an impedance resonance point that appears near 4.8 GHz and improve the axial ratio bandwidth (ARBW). Second, a L-shaped strip etched into the square-slot ground plane is used to enhance the ARBW. Third, a L-shaped branch is inserted into the inverted L-shaped feeding line to improve the impedance matching at high frequencies. At a result, the multiple circularly polarized (CP) resonant points could be excited by using these slot and strips as perturbation elements to alter the surface current distribution of the antenna. To demonstrate the design rationality, a designed antenna model is simulated, manufactured, and measured. The tested results show the proposed antenna has a wider −10-dB impedance bandwidth from 2.6 to 6.6 GHz (86.9%) and a broad 3-dB ARBW from 2.35 to 5.80 GHz (84.7%). In addition, the measured peak gain of the antenna is 4.8 dBi. The presented antenna has a potential application value in C band wireless communication.
{"title":"A new wideband circularly polarized square-slot antenna with parasitic elements","authors":"Dong Yang, Lichao Hao, ZhenHua Cao, W. Dai","doi":"10.1080/02726343.2023.2206267","DOIUrl":"https://doi.org/10.1080/02726343.2023.2206267","url":null,"abstract":"ABSTRACT A novel broadband circularly polarized square-slot antenna with parasitic elements is presented in this article. The proposed antenna with dimensions of 77.6 × 77.6 × 1.6 mm3 is composed of a L-shaped strip, a pair of rectangular slots, a L-shaped branch, and an inverted L-shaped feeding line. First, a pair of rectangular slots are used to excite an impedance resonance point that appears near 4.8 GHz and improve the axial ratio bandwidth (ARBW). Second, a L-shaped strip etched into the square-slot ground plane is used to enhance the ARBW. Third, a L-shaped branch is inserted into the inverted L-shaped feeding line to improve the impedance matching at high frequencies. At a result, the multiple circularly polarized (CP) resonant points could be excited by using these slot and strips as perturbation elements to alter the surface current distribution of the antenna. To demonstrate the design rationality, a designed antenna model is simulated, manufactured, and measured. The tested results show the proposed antenna has a wider −10-dB impedance bandwidth from 2.6 to 6.6 GHz (86.9%) and a broad 3-dB ARBW from 2.35 to 5.80 GHz (84.7%). In addition, the measured peak gain of the antenna is 4.8 dBi. The presented antenna has a potential application value in C band wireless communication.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43479239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-04-03DOI: 10.1080/02726343.2023.2206265
H. Hao, Huangxia Xu, Qinxuan Ling, Yunrui Wang, Bin Wang
ABSTRACT In order to meet the development requirements of multi-frequency and functional integration of radio frequency (RF) modules, a broadband tunable filtering power divider with center frequency is designed. A new structure is composed of open branch line, step impedance resonator, and double branch resonator. The filter response is realized by branch line and double branch resonator. The resonant frequency of the device can be adjusted flexibly by controlling the varactor diode loaded on the two resonators with external voltage. The double branch resonator can realize the broadband frequency adjustability, the step impedance resonator can improve part of the return loss performance of the device, so that the central frequency can achieve high performance in a wide tuning range. The research results show that the center frequency of the designed filtering power divider is adjustable in the range of 1.6 GHz to 2.7 GHz, the tuning bandwidth is 51.2%, the input return loss of each center point is better than 20 dB, and the isolation between output ports is better than 19 dB. The device is expected to be widely used in RF communication systems such as array antennas and transceiver components.
{"title":"Design of a broadband frequency-tunable planar filtering power divider","authors":"H. Hao, Huangxia Xu, Qinxuan Ling, Yunrui Wang, Bin Wang","doi":"10.1080/02726343.2023.2206265","DOIUrl":"https://doi.org/10.1080/02726343.2023.2206265","url":null,"abstract":"ABSTRACT In order to meet the development requirements of multi-frequency and functional integration of radio frequency (RF) modules, a broadband tunable filtering power divider with center frequency is designed. A new structure is composed of open branch line, step impedance resonator, and double branch resonator. The filter response is realized by branch line and double branch resonator. The resonant frequency of the device can be adjusted flexibly by controlling the varactor diode loaded on the two resonators with external voltage. The double branch resonator can realize the broadband frequency adjustability, the step impedance resonator can improve part of the return loss performance of the device, so that the central frequency can achieve high performance in a wide tuning range. The research results show that the center frequency of the designed filtering power divider is adjustable in the range of 1.6 GHz to 2.7 GHz, the tuning bandwidth is 51.2%, the input return loss of each center point is better than 20 dB, and the isolation between output ports is better than 19 dB. The device is expected to be widely used in RF communication systems such as array antennas and transceiver components.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43981487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-17DOI: 10.1080/02726343.2023.2192102
W. Dai
ABSTRACT In this letter, a new wideband circularly polarized (CP) slot – microstrip patch antenna (SPMA) is elaborated. The proposed antenna consists of four crown patches as parasitic patches, an L-shaped crown slot etched into the ground plane as a parasitic slot, and a circular loop sequential rotating feeding structure (SRFS) as a driven element. First, four crown patches are used to stimulate a CP resonance. Second, the L-shaped crown slot is applied to excite an additional CP resonance. After that, the CP bandwidth of the antenna could be enhanced by combining these CP resonant modes. The measured results demonstrate that the antenna features a wide CPBW of 14.8% (5.30–6.15, 5.725 GHz), which has a potential application value in the WIFI (5.85–5.925 GHz) bands and the wireless local area network ITS (5.8 GHz) and (5.725–5.85 GHz).
{"title":"Wideband circularly polarized microstrip-slot antenna with parasitic elements","authors":"W. Dai","doi":"10.1080/02726343.2023.2192102","DOIUrl":"https://doi.org/10.1080/02726343.2023.2192102","url":null,"abstract":"ABSTRACT In this letter, a new wideband circularly polarized (CP) slot – microstrip patch antenna (SPMA) is elaborated. The proposed antenna consists of four crown patches as parasitic patches, an L-shaped crown slot etched into the ground plane as a parasitic slot, and a circular loop sequential rotating feeding structure (SRFS) as a driven element. First, four crown patches are used to stimulate a CP resonance. Second, the L-shaped crown slot is applied to excite an additional CP resonance. After that, the CP bandwidth of the antenna could be enhanced by combining these CP resonant modes. The measured results demonstrate that the antenna features a wide CPBW of 14.8% (5.30–6.15, 5.725 GHz), which has a potential application value in the WIFI (5.85–5.925 GHz) bands and the wireless local area network ITS (5.8 GHz) and (5.725–5.85 GHz).","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48977338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-17DOI: 10.1080/02726343.2023.2192091
Wenbo Li, Bin Wang, Xue Tian
ABSTRACT In this paper, a series-fed microstrip antenna array with low sidelobe is presented for 24-GHz automotive radar. Chebyshev distribution is realized by different widths of a quarter-guided wavelength (λ g /4) feedline between adjacent antenna elements, achieving a low sidelobe level (SLL). A 1 × 8 antenna array is designed with the SLL of −23.1 dB at 24.125 GHz, which is extended to 2 × 8 and 8 × 8 planar arrays to improve array gain. The measured gain of 2 × 8 and 8 × 8 planar arrays is 17.3 dBi with an SLL of −23.6 dB and 22.1 dBi with an SLL of −24.7 dB at 24.125 GHz, respectively. In summary, the two antennas have excellent performance in the 24 GHz ISM band with the characteristics of good performance, simple structure, and easy integration, which can be applied to 24-GHz automotive radar.
{"title":"A series-fed low sidelobe antenna for 24-GHz automotive radar","authors":"Wenbo Li, Bin Wang, Xue Tian","doi":"10.1080/02726343.2023.2192091","DOIUrl":"https://doi.org/10.1080/02726343.2023.2192091","url":null,"abstract":"ABSTRACT In this paper, a series-fed microstrip antenna array with low sidelobe is presented for 24-GHz automotive radar. Chebyshev distribution is realized by different widths of a quarter-guided wavelength (λ g /4) feedline between adjacent antenna elements, achieving a low sidelobe level (SLL). A 1 × 8 antenna array is designed with the SLL of −23.1 dB at 24.125 GHz, which is extended to 2 × 8 and 8 × 8 planar arrays to improve array gain. The measured gain of 2 × 8 and 8 × 8 planar arrays is 17.3 dBi with an SLL of −23.6 dB and 22.1 dBi with an SLL of −24.7 dB at 24.125 GHz, respectively. In summary, the two antennas have excellent performance in the 24 GHz ISM band with the characteristics of good performance, simple structure, and easy integration, which can be applied to 24-GHz automotive radar.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46774794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-17DOI: 10.1080/02726343.2023.2192101
Abha Sharma, Ajay Yadav, Amit Rathi
ABSTRACT This article presents a circular microstrip patch antenna loaded with three complementary split rings (CSRRs) on the ground plane for pattern agility features. The antenna resonated at 5.3 GHz and accommodated the frequency spectrum from 5.1–5.7 GHz for different CSRR combinations. The reconfigurable pattern feature has been produced with three p-i-n diode combinations integrated with the CSRR slot on the ground patch. The CSRR combinations are utilized to change the radiation phase concerning the primary radiating circular patch. The proposed antenna radiation beam can steer from ±15°, 180°, and 0° of the broadside pattern in the elevation plane with a satisfactory gain of 3 dBi. The phase variation for various CSRR combinations concerning the primary antenna is presented. The presented antenna is fabricated on an FR4 substrate and tested in an anechoic environment; the tested results verify the pattern agility of the antenna. The demonstrated antenna is suitable for modern wireless communications like LTE and Cognitive radios. The compact size, simple biasing, and low cost are added advantages of the antenna.
{"title":"A novel pattern agile microstrip antenna for modern wireless communication systems","authors":"Abha Sharma, Ajay Yadav, Amit Rathi","doi":"10.1080/02726343.2023.2192101","DOIUrl":"https://doi.org/10.1080/02726343.2023.2192101","url":null,"abstract":"ABSTRACT This article presents a circular microstrip patch antenna loaded with three complementary split rings (CSRRs) on the ground plane for pattern agility features. The antenna resonated at 5.3 GHz and accommodated the frequency spectrum from 5.1–5.7 GHz for different CSRR combinations. The reconfigurable pattern feature has been produced with three p-i-n diode combinations integrated with the CSRR slot on the ground patch. The CSRR combinations are utilized to change the radiation phase concerning the primary radiating circular patch. The proposed antenna radiation beam can steer from ±15°, 180°, and 0° of the broadside pattern in the elevation plane with a satisfactory gain of 3 dBi. The phase variation for various CSRR combinations concerning the primary antenna is presented. The presented antenna is fabricated on an FR4 substrate and tested in an anechoic environment; the tested results verify the pattern agility of the antenna. The demonstrated antenna is suitable for modern wireless communications like LTE and Cognitive radios. The compact size, simple biasing, and low cost are added advantages of the antenna.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47323663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-17DOI: 10.1080/02726343.2023.2192092
Kai Zhang, Fan Yang, Weidong Wang, Chen Zheng, Borong Zou, Hui Li
ABSTRACT Ionospheric delay is the most significant source of error affecting the Loran skywave timing. To improve timing service, we propose a new ionospheric delay estimation method in this paper. It is a cosine model that combines the ionospheric physical characteristics and skywave delay variation law. This semi-empirical and semi-measured model has characteristics of accuracy and simplicity compared with the traditional method. The experimental results show that estimation error of the model is less than 1 µs for a single day and less than 2 µs for 3 days in the stable time. It is sufficient to correct more than 90% of delay when skywave passes through the ionosphere and is less affected by the season. This paper also gives some suggestions on the propagation of ionospheric coefficients required for the model. It allows broadcasting only by modifying the data channel message structure under the normal operation of Loran system.
{"title":"Ionospheric delay estimation of Loran skywave using simple cosine model","authors":"Kai Zhang, Fan Yang, Weidong Wang, Chen Zheng, Borong Zou, Hui Li","doi":"10.1080/02726343.2023.2192092","DOIUrl":"https://doi.org/10.1080/02726343.2023.2192092","url":null,"abstract":"ABSTRACT Ionospheric delay is the most significant source of error affecting the Loran skywave timing. To improve timing service, we propose a new ionospheric delay estimation method in this paper. It is a cosine model that combines the ionospheric physical characteristics and skywave delay variation law. This semi-empirical and semi-measured model has characteristics of accuracy and simplicity compared with the traditional method. The experimental results show that estimation error of the model is less than 1 µs for a single day and less than 2 µs for 3 days in the stable time. It is sufficient to correct more than 90% of delay when skywave passes through the ionosphere and is less affected by the season. This paper also gives some suggestions on the propagation of ionospheric coefficients required for the model. It allows broadcasting only by modifying the data channel message structure under the normal operation of Loran system.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47274884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-17DOI: 10.1080/02726343.2023.2192103
Xiaoqiao Deng, Yuanjiang Li, Xiaolong Li, Lin Bao, Yubo Tian
ABSTRACT The bowtie antenna loaded with triangular-shaped fractal parasitic elements (TSFPE) is a kind of novel dual-band antenna with excellent performance and unique advantages. If it can achieve frequency reconfiguration by loading RF switches, its application will be further expanded. This paper attempts to load the RF switch onto the novel antenna. It is found in the research that the TSFPE performance is seriously deteriorated after loading the RF switch due to the discontinuous effect of RF switch loading. Therefore, a trapezoidal patch compensation loading scheme is proposed to ensure the performance of TSFPE. Through trapezoidal patch loading, S11 of TSFPE can be effectively improved, and its gain can be increased by 1.6 dB. The simulation and measurement results show that the designed frequency reconfigurable antenna has good performance in X/Ku/ka bands. The idea and method of compensation design after switch loading can be further popularized and applied.
{"title":"Research on frequency reconfigurable bowtie antenna loaded with triangular shaped fractal parasitic elements","authors":"Xiaoqiao Deng, Yuanjiang Li, Xiaolong Li, Lin Bao, Yubo Tian","doi":"10.1080/02726343.2023.2192103","DOIUrl":"https://doi.org/10.1080/02726343.2023.2192103","url":null,"abstract":"ABSTRACT The bowtie antenna loaded with triangular-shaped fractal parasitic elements (TSFPE) is a kind of novel dual-band antenna with excellent performance and unique advantages. If it can achieve frequency reconfiguration by loading RF switches, its application will be further expanded. This paper attempts to load the RF switch onto the novel antenna. It is found in the research that the TSFPE performance is seriously deteriorated after loading the RF switch due to the discontinuous effect of RF switch loading. Therefore, a trapezoidal patch compensation loading scheme is proposed to ensure the performance of TSFPE. Through trapezoidal patch loading, S11 of TSFPE can be effectively improved, and its gain can be increased by 1.6 dB. The simulation and measurement results show that the designed frequency reconfigurable antenna has good performance in X/Ku/ka bands. The idea and method of compensation design after switch loading can be further popularized and applied.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42817277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-02-17DOI: 10.1080/02726343.2023.2192104
Long Jin, Zhibin He, Jiuyang Xiao, Yao Sun, Yangmiao Lin, Ruohan Zhang
ABSTRACT A broadside direction gain-enhanced low-cost dual-polarized microstrip patch antenna has been presented. The proposed antenna consists of a slot-loaded cross-shaped patch and shorting pins. The orthogonal polarized radiating elements works in TM05 and TM12, meanwhile slot-loaded excite TM01. The equivalent magnetic currents (EMCs) amplitude, frequency, and flow direction of the TM12 are controlled by shorting pins to form the broadside gain enhancement. The superposition of them can enhance the gain in the broadside direction. The proposed antenna is coaxial feed. The substrate is divided into two layers: air and FR4. A copper column is added to the air layer to greatly improve the polarized isolation of the antenna. The size of the proposed antenna is 2.29λ 0×2.29λ 0×0.069λ 0 (λ 0 is the wavelength of free space at the central frequency). The simulated maximum realized gain is 12.59 dB, and the realized gain is better than 11.53 dB in operating band. The measured maximum realized gain is 12.05 dB, and the realized gain is better than 10.04 dB. The dual-polarized microstrip patch antenna has the advantages of low cost and high gain, which can be used in the modern wireless communication system.
{"title":"A novel dual-polarized gain-enhanced microstrip patch antenna","authors":"Long Jin, Zhibin He, Jiuyang Xiao, Yao Sun, Yangmiao Lin, Ruohan Zhang","doi":"10.1080/02726343.2023.2192104","DOIUrl":"https://doi.org/10.1080/02726343.2023.2192104","url":null,"abstract":"ABSTRACT A broadside direction gain-enhanced low-cost dual-polarized microstrip patch antenna has been presented. The proposed antenna consists of a slot-loaded cross-shaped patch and shorting pins. The orthogonal polarized radiating elements works in TM05 and TM12, meanwhile slot-loaded excite TM01. The equivalent magnetic currents (EMCs) amplitude, frequency, and flow direction of the TM12 are controlled by shorting pins to form the broadside gain enhancement. The superposition of them can enhance the gain in the broadside direction. The proposed antenna is coaxial feed. The substrate is divided into two layers: air and FR4. A copper column is added to the air layer to greatly improve the polarized isolation of the antenna. The size of the proposed antenna is 2.29λ 0×2.29λ 0×0.069λ 0 (λ 0 is the wavelength of free space at the central frequency). The simulated maximum realized gain is 12.59 dB, and the realized gain is better than 11.53 dB in operating band. The measured maximum realized gain is 12.05 dB, and the realized gain is better than 10.04 dB. The dual-polarized microstrip patch antenna has the advantages of low cost and high gain, which can be used in the modern wireless communication system.","PeriodicalId":50542,"journal":{"name":"Electromagnetics","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2023-02-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48561161","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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