Pub Date : 2012-10-01DOI: 10.23919/EUMC.2012.6459413
Zhenhai Ji, Weiqiang Zhu, Zhijian Li, Yongzhi Sun, Qi Wang
Conventional Phased array antenna (PAA) had beam squint during scanning in wide instantaneous bandwidth, and the paper proposed a novel method based on optical true time delay (OTTD) to solve the problem, which adopted the hybrid architecture of by-pass and differential architecture to realize the OTTD. The novel method has characteristics of high delay accuracy, compact volume and low loss. The experiments show the proposed method, which can solve the beam squint during scanning wide bandwidth and have better amplitude-frequency and phase response character as well as.
{"title":"A novel method of optical true time delay in phased array antenna","authors":"Zhenhai Ji, Weiqiang Zhu, Zhijian Li, Yongzhi Sun, Qi Wang","doi":"10.23919/EUMC.2012.6459413","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459413","url":null,"abstract":"Conventional Phased array antenna (PAA) had beam squint during scanning in wide instantaneous bandwidth, and the paper proposed a novel method based on optical true time delay (OTTD) to solve the problem, which adopted the hybrid architecture of by-pass and differential architecture to realize the OTTD. The novel method has characteristics of high delay accuracy, compact volume and low loss. The experiments show the proposed method, which can solve the beam squint during scanning wide bandwidth and have better amplitude-frequency and phase response character as well as.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123888243","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459402
T. Maleszka, P. Kabacik
The paper describes performance of textile and flexible antennas operating in the nearest vicinity of human body (at S-band and UHF), manufactured with use of four techniques. Presented results of our studies have revealed, a kind of fabric used to antenna manufacture has remarkable effect on gain, efficiency, radiation pattern and antenna bandwidth defined by impedance and other terms.
{"title":"Variations in properties of on- and off-body antennas manufactured with various fabrics","authors":"T. Maleszka, P. Kabacik","doi":"10.23919/EUMC.2012.6459402","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459402","url":null,"abstract":"The paper describes performance of textile and flexible antennas operating in the nearest vicinity of human body (at S-band and UHF), manufactured with use of four techniques. Presented results of our studies have revealed, a kind of fabric used to antenna manufacture has remarkable effect on gain, efficiency, radiation pattern and antenna bandwidth defined by impedance and other terms.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124490852","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459214
K. Kawai, H. Okazaki, S. Narahashi
This paper proposes a novel tunable dual-band bandpass filter that can individually tune its center frequency and the bandwidth of its two passbands. The proposed filter comprises two tunable single-band filters and branch lines that achieve a nearly independent tuning capability of its center frequency and the bandwidth in each passband. In addition, when tuning the frequency characteristics of one passband the characteristics of the other passband are not significantly affected. To the best knowledge of the authors, this is the first dual-band bandpass filter with highly flexible tuning capabilities in the 5-GHz band.
{"title":"5-GHz-band center frequency and bandwidth tunable dual-band bandpass filter","authors":"K. Kawai, H. Okazaki, S. Narahashi","doi":"10.23919/EUMC.2012.6459214","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459214","url":null,"abstract":"This paper proposes a novel tunable dual-band bandpass filter that can individually tune its center frequency and the bandwidth of its two passbands. The proposed filter comprises two tunable single-band filters and branch lines that achieve a nearly independent tuning capability of its center frequency and the bandwidth in each passband. In addition, when tuning the frequency characteristics of one passband the characteristics of the other passband are not significantly affected. To the best knowledge of the authors, this is the first dual-band bandpass filter with highly flexible tuning capabilities in the 5-GHz band.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129048096","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459410
A. Rodriguez, V. Boria, J. Selga, F. Martín
In this work, a robust method for the automated synthesis of microstrip lines loaded with complementary split-ring resonators (CSRRs), starting from equivalent circuit models, is presented. Following this novel space mapping-based strategy, the initial estimated layout is already very close to the optimum final solution, thus achieving a fast and very soft convergence rate of the whole synthesis procedure. Additionally, this synthesis method is able to evaluate the suitability of the proposed microstrip technology for implementing any given target frequency response. For this purpose, the convergence region of this synthesis algorithm (related to the physical realization of the CSRRs loading the host microstrip line), is obtained following an aggressive space mapping (ASM) technique. For validation issues, three design examples are shown.
{"title":"A robust space mapping method for the practical synthesis of CSRR-based artificial transmission lines from equivalent circuit models","authors":"A. Rodriguez, V. Boria, J. Selga, F. Martín","doi":"10.23919/EUMC.2012.6459410","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459410","url":null,"abstract":"In this work, a robust method for the automated synthesis of microstrip lines loaded with complementary split-ring resonators (CSRRs), starting from equivalent circuit models, is presented. Following this novel space mapping-based strategy, the initial estimated layout is already very close to the optimum final solution, thus achieving a fast and very soft convergence rate of the whole synthesis procedure. Additionally, this synthesis method is able to evaluate the suitability of the proposed microstrip technology for implementing any given target frequency response. For this purpose, the convergence region of this synthesis algorithm (related to the physical realization of the CSRRs loading the host microstrip line), is obtained following an aggressive space mapping (ASM) technique. For validation issues, three design examples are shown.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130532408","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459265
J. P. Magalhães, J. Vieira, R. Gómez‐García, N. Carvalho
This paper proposes an original architecture for a Software-Defined-Radio receiver based on an Hybrid Filter Bank. The key issue for its proper operation is the channelization of the incoming signal into multiple sub-bands, that is performed at two stages: radio-frequency (RF) and intermediate-frequency (IF) levels. Thus, low-cost analog-to-digital converters (ADCs) can be employed for the sampling of these sub-bands to be subsequently processed at the digital level for the overall signal reconstruction. Special attention is given to the RF and IF channelizers, for which two suitable designs consisting of an eight-channel double-star-junction and a cochlea-like multiplexer, respectively, are devised. For experimental verification, two prototypes in microstrip and lumped-element technologies are developed and characterized.
{"title":"RF and IF channelizers for wide-band sensing in cognitive/Software-Defined-Radio receivers","authors":"J. P. Magalhães, J. Vieira, R. Gómez‐García, N. Carvalho","doi":"10.23919/EUMC.2012.6459265","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459265","url":null,"abstract":"This paper proposes an original architecture for a Software-Defined-Radio receiver based on an Hybrid Filter Bank. The key issue for its proper operation is the channelization of the incoming signal into multiple sub-bands, that is performed at two stages: radio-frequency (RF) and intermediate-frequency (IF) levels. Thus, low-cost analog-to-digital converters (ADCs) can be employed for the sampling of these sub-bands to be subsequently processed at the digital level for the overall signal reconstruction. Special attention is given to the RF and IF channelizers, for which two suitable designs consisting of an eight-channel double-star-junction and a cochlea-like multiplexer, respectively, are devised. For experimental verification, two prototypes in microstrip and lumped-element technologies are developed and characterized.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130079677","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459196
D. Glay, A. El Fellahi, T. Lasri
In this paper we present a novel method of near-field microwave microscopy using a high impedance measurement system. The proposed system combines a classical vector network analyzer to a high referenced impedance splitter via impedance matching networks. We show that the resulting high impedance reflectometer associated to a tip probe permits to compensate the limitation of the non-resonant mode by using the frequency diversity.
{"title":"High impedance reflectometer dedicated to non-resonant near-field microwave microscopy","authors":"D. Glay, A. El Fellahi, T. Lasri","doi":"10.23919/EUMC.2012.6459196","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459196","url":null,"abstract":"In this paper we present a novel method of near-field microwave microscopy using a high impedance measurement system. The proposed system combines a classical vector network analyzer to a high referenced impedance splitter via impedance matching networks. We show that the resulting high impedance reflectometer associated to a tip probe permits to compensate the limitation of the non-resonant mode by using the frequency diversity.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124773576","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459324
P. Vizarreta, G. Montoro, P. Gilabert
This paper presents an envelope tracking (ET) Power Amplifier (PA) whose architecture includes an efficient Envelope Amplifier (EA) and a bandwidth reduction algorithm suitable for real time applications. The EA consists of a hybrid amplifier combining switched and linear amplification. A bandwidth and slew-rate reduction algorithm has been incorporated in order to allow wide-band envelope amplifications. Non-linearities introduced by the Hybrid EA (HEA) and the dynamic supply are compensated with Digital Pre-Distortion. The ET PA has been tested using 64-QAM signals and commercial devices. Results show that non-linearities produced by the HEA are compensable and that the architecture provides efficiency improvements compared to the conventional linear EA.
{"title":"Hybrid Envelope Amplifier for envelope tracking power amplifier transmitters","authors":"P. Vizarreta, G. Montoro, P. Gilabert","doi":"10.23919/EUMC.2012.6459324","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459324","url":null,"abstract":"This paper presents an envelope tracking (ET) Power Amplifier (PA) whose architecture includes an efficient Envelope Amplifier (EA) and a bandwidth reduction algorithm suitable for real time applications. The EA consists of a hybrid amplifier combining switched and linear amplification. A bandwidth and slew-rate reduction algorithm has been incorporated in order to allow wide-band envelope amplifications. Non-linearities introduced by the Hybrid EA (HEA) and the dynamic supply are compensated with Digital Pre-Distortion. The ET PA has been tested using 64-QAM signals and commercial devices. Results show that non-linearities produced by the HEA are compensable and that the architecture provides efficiency improvements compared to the conventional linear EA.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125627551","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459176
J. P. Guzman, S. Muhammad, M. Ney, C. Person
In this paper, a completely packaged solution is presented for high data rate radio front end operating around 60 GHz. A cylindrical dielectric resonator antenna is micromachined as a part of the package surrounding other active elements. This resonator is magnetically coupled to a nearby integrated coplanar-fed slotted dipole. Simulation results show a 6.1GHz impedance matching bandwidth (VSWR=2) with a gain greater than 5dBi throughout the entire bandwidth.
{"title":"Cylindrical dielectric resonator antenna excited by on-chip integrated slot for a completely packaged 60 GHz front-end solution","authors":"J. P. Guzman, S. Muhammad, M. Ney, C. Person","doi":"10.23919/EUMC.2012.6459176","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459176","url":null,"abstract":"In this paper, a completely packaged solution is presented for high data rate radio front end operating around 60 GHz. A cylindrical dielectric resonator antenna is micromachined as a part of the package surrounding other active elements. This resonator is magnetically coupled to a nearby integrated coplanar-fed slotted dipole. Simulation results show a 6.1GHz impedance matching bandwidth (VSWR=2) with a gain greater than 5dBi throughout the entire bandwidth.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127123164","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459422
G. Sajin, F. Craciunoiu, A. Dinescu, I. Mocanu, A. Stefanescu
The paper presents a zeroth order resonance (ZOR) Composite Right / Left-Handed (CRLH) coplanar waveguide (CPW) antenna on AlSiMag 614 alumina substrate. The device was designed, microprocessed by laser ablation and tested for millimeter wave frequency range (48 GHz). Experimental results for two antenna samples show return loss of -21.98 dB at 48.01 GHz and -20.42 dB at 48.17 GHz respectively. The -3 dB beamwidth of the transversal radiation lobe for two antenna samples are 57° and 54°, respectively. The gain measured at 48 GHz using the De Friis method was 8.98 dBi.
{"title":"Laser ablated 48 GHz ZOR CRLH antenna on alumina substrate","authors":"G. Sajin, F. Craciunoiu, A. Dinescu, I. Mocanu, A. Stefanescu","doi":"10.23919/EUMC.2012.6459422","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459422","url":null,"abstract":"The paper presents a zeroth order resonance (ZOR) Composite Right / Left-Handed (CRLH) coplanar waveguide (CPW) antenna on AlSiMag 614 alumina substrate. The device was designed, microprocessed by laser ablation and tested for millimeter wave frequency range (48 GHz). Experimental results for two antenna samples show return loss of -21.98 dB at 48.01 GHz and -20.42 dB at 48.17 GHz respectively. The -3 dB beamwidth of the transversal radiation lobe for two antenna samples are 57° and 54°, respectively. The gain measured at 48 GHz using the De Friis method was 8.98 dBi.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"10 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113962151","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 : 2012-10-01DOI: 10.23919/EUMC.2012.6459248
Nasimuddin, Zhi Ning Chen, X. Qing
A microstrip-fed symmetric-slot antenna is proposed for wideband circularly polarized radiation. The antenna consists of a microstrip feed line and a wide symmetrical slot along the diagonal axis. The slot and feeding structure are fabricated on the opposite plane of a low cost FR4 substrate. The wideband is achieved by changing the symmetric-shaped slot lengths and a strip-line length. The measured 3-dB axial ratio and 10-dB return-loss bandwidths of the antenna are around 50% and more than 100% respectively. The boresight gain and backside gain is more than 3.0 dBic over the 3-dB axial ratio bandwidth.
{"title":"Wideband circularly polarized slot antenna","authors":"Nasimuddin, Zhi Ning Chen, X. Qing","doi":"10.23919/EUMC.2012.6459248","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459248","url":null,"abstract":"A microstrip-fed symmetric-slot antenna is proposed for wideband circularly polarized radiation. The antenna consists of a microstrip feed line and a wide symmetrical slot along the diagonal axis. The slot and feeding structure are fabricated on the opposite plane of a low cost FR4 substrate. The wideband is achieved by changing the symmetric-shaped slot lengths and a strip-line length. The measured 3-dB axial ratio and 10-dB return-loss bandwidths of the antenna are around 50% and more than 100% respectively. The boresight gain and backside gain is more than 3.0 dBic over the 3-dB axial ratio bandwidth.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122550703","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：