Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366004
S. Zhekov, A. Tatomirescu, G. Pedersen
This paper presents a new design for a multiband sensing MIMO antenna system that can be used in cognitive radio communication for a mobile platform. The antenna system consists of two identical small-size multiband antennas with dimensions 29.5 × 17 × 5 mm3 and each of them is comprised of a driven strip monopole and a coupled parasitic shorted strip. These antennas are located diagonally to limit the mutual coupling and antenna correlation at low frequencies. The obtained operating bands are 698-990 MHz and 1710-5530 MHz, which include most of the LTE and Wi-Fi frequency bands. A prototype was fabricated and the measured results indicate that the realized efficiency is acceptable for a mobile application considering the compact size.
{"title":"Compact multiband sensing MIMO antenna array for cognitive radio system","authors":"S. Zhekov, A. Tatomirescu, G. Pedersen","doi":"10.1109/LAPC.2015.7366004","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366004","url":null,"abstract":"This paper presents a new design for a multiband sensing MIMO antenna system that can be used in cognitive radio communication for a mobile platform. The antenna system consists of two identical small-size multiband antennas with dimensions 29.5 × 17 × 5 mm3 and each of them is comprised of a driven strip monopole and a coupled parasitic shorted strip. These antennas are located diagonally to limit the mutual coupling and antenna correlation at low frequencies. The obtained operating bands are 698-990 MHz and 1710-5530 MHz, which include most of the LTE and Wi-Fi frequency bands. A prototype was fabricated and the measured results indicate that the realized efficiency is acceptable for a mobile application considering the compact size.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126471453","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366107
S. Hamid, Britta Karnbach, H. Shakhtour, D. Heberling
Design and characterization of a multilayer structure consisting of stacked frequency selective surfaces (FSS) combined with a patterned laminate absorber is presented. The FSS part is a higher order bandpass filter that operates in the C-band, namely from 5 GHz to 6 GHz. Its higher order response is achieved through the stacking of capacitive-inductive-capacitive layers to maintain the low-profile structure. The patterned absorber is glued on one side of the FSS so that the resulting structure is capable of absorbing signals in the X-band (receiving mode). The prototype has been fabricated using Taconic RF-35 substrates and Eccosorb SF for the FSS and absorber parts, respectively. It has a dimension of 24.5 cm × 24.5 cm with a thickness of 0.65 cm. The measurement has been done using free space method. The transmission loss in the passband is less than 1 dB and the roll-off slope is more than 65 dB/octave. The absorption band, characterized by its low reflection and transmission response (less than -10 dB), covers the range from 8.26 GHz to more than 12 GHz. These specifications make this prototype a promising candidate for a planar radome absorber application.
{"title":"Thin multilayer frequency selective surface absorber with wide absorption response","authors":"S. Hamid, Britta Karnbach, H. Shakhtour, D. Heberling","doi":"10.1109/LAPC.2015.7366107","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366107","url":null,"abstract":"Design and characterization of a multilayer structure consisting of stacked frequency selective surfaces (FSS) combined with a patterned laminate absorber is presented. The FSS part is a higher order bandpass filter that operates in the C-band, namely from 5 GHz to 6 GHz. Its higher order response is achieved through the stacking of capacitive-inductive-capacitive layers to maintain the low-profile structure. The patterned absorber is glued on one side of the FSS so that the resulting structure is capable of absorbing signals in the X-band (receiving mode). The prototype has been fabricated using Taconic RF-35 substrates and Eccosorb SF for the FSS and absorber parts, respectively. It has a dimension of 24.5 cm × 24.5 cm with a thickness of 0.65 cm. The measurement has been done using free space method. The transmission loss in the passband is less than 1 dB and the roll-off slope is more than 65 dB/octave. The absorption band, characterized by its low reflection and transmission response (less than -10 dB), covers the range from 8.26 GHz to more than 12 GHz. These specifications make this prototype a promising candidate for a planar radome absorber application.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"259 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133697721","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366024
Niels Koch
For high speed digital data connection such as WiMAX or WLAN, a good signal to noise ratio (S/N) is required. One way to keep up a good S/N-value while moving is the use of high gain antennas with a directive antenna beam. However, often there is insufficient room to place high gain antennas in a vehicle. On top if this, it is becoming increasingly difficult and more packed in the car, so that progressive antenna approaches are enforced. As a vehicle can move towards and away from the transmitter site in any azimuth angle, the antenna shall offer some omni-directionality. In this paper, an antenna for 2.45 GHz WLAN is described. It is very thin of 4 mm, and it offers 12 dBi antenna gain with almost omni-directional but very beneficial radiation characteristics with "rabbit-ear" shaped double-lobes. Moreover it can be easily implemented into the plastic spoiler on a hatchback vehicle. Experiments proof that this flat WLAN antenna structure in a spoiler outperforms monopoles and patch antennas on rooftop in any respect. When tuning to the right frequency, this antenna is ideally suited for Car2X-applications and Wireless Internet utilization such as WiMAX and WLAN.
{"title":"Vehicular spoiler antenna for high data rate WLAN","authors":"Niels Koch","doi":"10.1109/LAPC.2015.7366024","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366024","url":null,"abstract":"For high speed digital data connection such as WiMAX or WLAN, a good signal to noise ratio (S/N) is required. One way to keep up a good S/N-value while moving is the use of high gain antennas with a directive antenna beam. However, often there is insufficient room to place high gain antennas in a vehicle. On top if this, it is becoming increasingly difficult and more packed in the car, so that progressive antenna approaches are enforced. As a vehicle can move towards and away from the transmitter site in any azimuth angle, the antenna shall offer some omni-directionality. In this paper, an antenna for 2.45 GHz WLAN is described. It is very thin of 4 mm, and it offers 12 dBi antenna gain with almost omni-directional but very beneficial radiation characteristics with \"rabbit-ear\" shaped double-lobes. Moreover it can be easily implemented into the plastic spoiler on a hatchback vehicle. Experiments proof that this flat WLAN antenna structure in a spoiler outperforms monopoles and patch antennas on rooftop in any respect. When tuning to the right frequency, this antenna is ideally suited for Car2X-applications and Wireless Internet utilization such as WiMAX and WLAN.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133949905","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366056
J. Faerber, M. Desmulliez
In this paper, a conformai meander line antenna for wireless telemetry is proposed. The capsule antenna is simulated in free space and in a one-layer body phantom to determine its characteristics and performance in a body tissue environment using the CST software package. Free space measurements were conducted using prototype devices, the results of which showed good agreement with those from the simulations.
{"title":"Conformal meander shaped antenna for biotelemetry in endoscopic capsules","authors":"J. Faerber, M. Desmulliez","doi":"10.1109/LAPC.2015.7366056","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366056","url":null,"abstract":"In this paper, a conformai meander line antenna for wireless telemetry is proposed. The capsule antenna is simulated in free space and in a one-layer body phantom to determine its characteristics and performance in a body tissue environment using the CST software package. Free space measurements were conducted using prototype devices, the results of which showed good agreement with those from the simulations.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"116 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129036809","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366021
A. Harmouch, H. Haddad, M. Ziade, A. El Sayed Ahmad, M. Kenaan
Conventional slotted waveguide antennas are well known and prominently used for many military and even marketable applications. This is due to their different advantageous electrical and mechanical characteristics. It is also well known that this type of antennas is a typical array of slots with which the width of the main beam can be controlled in only one plane by using a different number of elements in such antennas. Numerous research, discuss the capability of using an array of such antennas in order to narrow down the main beam in both planes and even achieve a scanning phased array. In this paper, a new and broader approach is presented concerning beam width control of the typical configuration of such antennas. This work presents the ability to control the main lobe in both planes using only one slotted waveguide to a certain extent. Different simulation results are considered at the 2.4GHz frequency demonstrating improved effectiveness in terms of directivity and high gain as well as minimizing the side-lobe level and mechanically controlling the main lobe of the antenna.
{"title":"Double-plane beamwidth control of conventional rectangular waveguide antennas using curved slotted surfaces","authors":"A. Harmouch, H. Haddad, M. Ziade, A. El Sayed Ahmad, M. Kenaan","doi":"10.1109/LAPC.2015.7366021","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366021","url":null,"abstract":"Conventional slotted waveguide antennas are well known and prominently used for many military and even marketable applications. This is due to their different advantageous electrical and mechanical characteristics. It is also well known that this type of antennas is a typical array of slots with which the width of the main beam can be controlled in only one plane by using a different number of elements in such antennas. Numerous research, discuss the capability of using an array of such antennas in order to narrow down the main beam in both planes and even achieve a scanning phased array. In this paper, a new and broader approach is presented concerning beam width control of the typical configuration of such antennas. This work presents the ability to control the main lobe in both planes using only one slotted waveguide to a certain extent. Different simulation results are considered at the 2.4GHz frequency demonstrating improved effectiveness in terms of directivity and high gain as well as minimizing the side-lobe level and mechanically controlling the main lobe of the antenna.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124919908","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366077
H. Shakhtour, D. Heberling
This paper analyses the effect of noisy near-field amplitude data on the phase retrieval algorithm. Additive white Gaussian noise is applied on the signal. Signal-to-noise ratios between 3 dB and 60 dB are considered. It'll be shown that using the Iterative Fourier Transform the far-field data can be obtained even under low signal-to-noise ratio.
{"title":"Phase-less planar near-field antenna measurements: Noise analysis","authors":"H. Shakhtour, D. Heberling","doi":"10.1109/LAPC.2015.7366077","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366077","url":null,"abstract":"This paper analyses the effect of noisy near-field amplitude data on the phase retrieval algorithm. Additive white Gaussian noise is applied on the signal. Signal-to-noise ratios between 3 dB and 60 dB are considered. It'll be shown that using the Iterative Fourier Transform the far-field data can be obtained even under low signal-to-noise ratio.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124956959","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366113
Maria A. Seimeni, P. Gkonis, D. Kaklamani, I. Venieris, C. Papavasiliou
The purpose of this paper is to examine the algorithmic quality of a semi-Random subcarrier allocation strategy and a Block Anti-Jamming Subcarrier Scavenging (BAJSS) strategy in terms of mean capacity, mean Bit Error Rate (BER), complexity as well as Jain's fairness index (power, capacity). These strategies are implemented in a LTE OFDMA multicellular network platform, which executes a fixed, sufficient for convergence, Monte Carlo (MC) runs. Both strategies are based on anti-jamming criteria so as to further mitigate Intra-Channel Interference (ICI). According to the results, semiRandom outperforms BAJSS and the traditional random strategy in terms of mean capacity, mean BER and power dissipation at the cost however of increased computational complexity.
{"title":"Resource exploitation in multi-carrier multi-cellular networks","authors":"Maria A. Seimeni, P. Gkonis, D. Kaklamani, I. Venieris, C. Papavasiliou","doi":"10.1109/LAPC.2015.7366113","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366113","url":null,"abstract":"The purpose of this paper is to examine the algorithmic quality of a semi-Random subcarrier allocation strategy and a Block Anti-Jamming Subcarrier Scavenging (BAJSS) strategy in terms of mean capacity, mean Bit Error Rate (BER), complexity as well as Jain's fairness index (power, capacity). These strategies are implemented in a LTE OFDMA multicellular network platform, which executes a fixed, sufficient for convergence, Monte Carlo (MC) runs. Both strategies are based on anti-jamming criteria so as to further mitigate Intra-Channel Interference (ICI). According to the results, semiRandom outperforms BAJSS and the traditional random strategy in terms of mean capacity, mean BER and power dissipation at the cost however of increased computational complexity.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122580860","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366088
Tae-Woo Kim, Kyung Choi, Hee‐Yong Hwang
In this paper, A miniaturized monopole UWB antenna with λ/4 meander slot line is presented. To achieve a considerable miniaturized antenna, a reference bowtie monopole antenna was simplified using the perfect magnetic wall condition. Also, to obtain rejection characteristic at the interference bandwidth of 5 GHz-WLAN, a meander shaped slot line was inserted at ground patch. In comparison with reference antenna, the proposed bowtie monopole antenna is about 18.5% in size.
{"title":"Small bowtie monopole UWB antenna","authors":"Tae-Woo Kim, Kyung Choi, Hee‐Yong Hwang","doi":"10.1109/LAPC.2015.7366088","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366088","url":null,"abstract":"In this paper, A miniaturized monopole UWB antenna with λ/4 meander slot line is presented. To achieve a considerable miniaturized antenna, a reference bowtie monopole antenna was simplified using the perfect magnetic wall condition. Also, to obtain rejection characteristic at the interference bandwidth of 5 GHz-WLAN, a meander shaped slot line was inserted at ground patch. In comparison with reference antenna, the proposed bowtie monopole antenna is about 18.5% in size.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117003543","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7365998
J. Vélim, J. Lambor, Z. Raida
The paper summarizes first experimental results related to the wireless transfer of electromagnetic power along a conductive surface of a car body. The investigated power transfer is aimed to supply sensors connected by a wireless network. The experimental system was designed at 60 GHz. The electromagnetic energy is transmitted and received by substrate integrated waveguide (SIW) planar horn antennas. Influence of the curvature of the car body is described. A 3D textile material is used as upholstery to improve efficiency of power transfer.
{"title":"Wireless power transfer along a car body at 60 GHz: Experimental investigations","authors":"J. Vélim, J. Lambor, Z. Raida","doi":"10.1109/LAPC.2015.7365998","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7365998","url":null,"abstract":"The paper summarizes first experimental results related to the wireless transfer of electromagnetic power along a conductive surface of a car body. The investigated power transfer is aimed to supply sensors connected by a wireless network. The experimental system was designed at 60 GHz. The electromagnetic energy is transmitted and received by substrate integrated waveguide (SIW) planar horn antennas. Influence of the curvature of the car body is described. A 3D textile material is used as upholstery to improve efficiency of power transfer.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117190124","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}
Pub Date : 2015-11-01DOI: 10.1109/LAPC.2015.7366028
Yanghong Tan, Yichuang Sun, Yanqing Zhu, D. Lauder, Baoyong Ch
An adaptive broadband antenna tuning technique using quantum genetic algorithms is proposed in this paper. This method is fast and can achieve a global optimal solution. It is useful for software defined radio systems using a single antenna for multiple mobile and wireless bands. Simulations have been conducted using GSM, UMTS and both standards, with different antenna impedances. The frequency band of the dual standards ranges from 1.7 to 2.2GHz. Simulation results show good accuracy of the proposed tuning technique.
{"title":"Broadband impedance and antenna tuning using quantum genetic algorithms for multistandard wireless communications","authors":"Yanghong Tan, Yichuang Sun, Yanqing Zhu, D. Lauder, Baoyong Ch","doi":"10.1109/LAPC.2015.7366028","DOIUrl":"https://doi.org/10.1109/LAPC.2015.7366028","url":null,"abstract":"An adaptive broadband antenna tuning technique using quantum genetic algorithms is proposed in this paper. This method is fast and can achieve a global optimal solution. It is useful for software defined radio systems using a single antenna for multiple mobile and wireless bands. Simulations have been conducted using GSM, UMTS and both standards, with different antenna impedances. The frequency band of the dual standards ranges from 1.7 to 2.2GHz. Simulation results show good accuracy of the proposed tuning technique.","PeriodicalId":339610,"journal":{"name":"2015 Loughborough Antennas & Propagation Conference (LAPC)","volume":"599 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120880984","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}
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