Pub Date : 2013-08-01DOI: 10.1109/IWEM.2013.6888798
Yi-Hsin Pang, Chiau-Ling Huang
This paper proposes a compact wideband filters consisting of a stepped-impedance transformer. The stepped-impedance transformer is loaded by two short-circuited stubs and a pair of open-circuited stubs. A wideband bandpass filter operated from 3.71 GHz to 7.28 GHz has been designed and simulated. The designed filter has also been fabricated for validation. The fabricated filter exhibits a 60% bandwidth and occupies an area of 8.6 × 8.35 mm2. A compact and wideband filter is therefore obtained.
{"title":"A compact wideband filter utilizing stepped-impedance transformer and stubs","authors":"Yi-Hsin Pang, Chiau-Ling Huang","doi":"10.1109/IWEM.2013.6888798","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888798","url":null,"abstract":"This paper proposes a compact wideband filters consisting of a stepped-impedance transformer. The stepped-impedance transformer is loaded by two short-circuited stubs and a pair of open-circuited stubs. A wideband bandpass filter operated from 3.71 GHz to 7.28 GHz has been designed and simulated. The designed filter has also been fabricated for validation. The fabricated filter exhibits a 60% bandwidth and occupies an area of 8.6 × 8.35 mm2. A compact and wideband filter is therefore obtained.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124103186","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888781
Q. Lin, Xiu Yin Zhang, H. Lai, H. Wong
In this paper, a wideband compact circularly-polarized (CP) patch antenna is proposed. This patch antenna is excited by a meandering probe which is implemented in multi-layered substrates. The proposed antenna is wide in both impedance and axial ratio (AR) bandwidths, which respectively are 49% (for reflection coefficient<;-10dB) and 8.64% (for AR<;3dB). The peak gain within the AR bandwidth is 7.3dBic and the gain variation is less than 0.5dB.
本文提出了一种宽带紧凑型圆极化贴片天线。这种贴片天线是由在多层衬底上实现的弯曲探针激发的。该天线具有较宽的阻抗和轴比(AR)带宽，分别为49%(反射系数< -10dB)和8.64% (AR <;3dB)。AR带宽内的峰值增益为7.3dBic，增益变化小于0.5dB。
{"title":"Wideband circularly-polarized dielectric loaded patch antenna fed by a meandering probe","authors":"Q. Lin, Xiu Yin Zhang, H. Lai, H. Wong","doi":"10.1109/IWEM.2013.6888781","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888781","url":null,"abstract":"In this paper, a wideband compact circularly-polarized (CP) patch antenna is proposed. This patch antenna is excited by a meandering probe which is implemented in multi-layered substrates. The proposed antenna is wide in both impedance and axial ratio (AR) bandwidths, which respectively are 49% (for reflection coefficient<;-10dB) and 8.64% (for AR<;3dB). The peak gain within the AR bandwidth is 7.3dBic and the gain variation is less than 0.5dB.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"13 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132580355","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888754
J. L. Li
Summary form only given. The wave propagation in a multilayered medium has been an important topic since the last century and can find many practical and useful applications in realistic engineering applications. In this talk, multilayered media of planar stratified and spherically multilayered structures are re-visited and the general solutions are obtained for general applications to microstrip antennas and arrays radiation in the multilayered structures. Associated with the spherical and planar structures, the Gibbs phenomena are again looked into, and analytic removal of such phenomena has been proposed and its implementation is conducted. Associated with the new solution, the fields and waves in multilayered spherical structures are formulated and their solutions are obtained in close form. Using the transformation electromagnetics approach, the waves and fields in planar stratified multilayers are obtained in series form, where the Sommerfeld integrals occurring in the planar multilayers can be avoided and accurate and rigorous solutions are obtained in explicit form. In the analysis, some numerical examples are obtained and comparison results are obtained to check the validity and accuracy. The new solution procedure serves as an alternative approach for evaluating the Sommerfeld integrals, for validating these approximate solutions from some well-known numerical approaches such as steepest saddle-point method, branch cut method and curve fitting approximations, and for setting a unified solution to the same problem of where various different solutions exist in literature.
{"title":"Keynote speaker 4: A new transformation solution to Sommerfeld integrals & analytical removal of Gibbs phenomena for multilayered media","authors":"J. L. Li","doi":"10.1109/IWEM.2013.6888754","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888754","url":null,"abstract":"Summary form only given. The wave propagation in a multilayered medium has been an important topic since the last century and can find many practical and useful applications in realistic engineering applications. In this talk, multilayered media of planar stratified and spherically multilayered structures are re-visited and the general solutions are obtained for general applications to microstrip antennas and arrays radiation in the multilayered structures. Associated with the spherical and planar structures, the Gibbs phenomena are again looked into, and analytic removal of such phenomena has been proposed and its implementation is conducted. Associated with the new solution, the fields and waves in multilayered spherical structures are formulated and their solutions are obtained in close form. Using the transformation electromagnetics approach, the waves and fields in planar stratified multilayers are obtained in series form, where the Sommerfeld integrals occurring in the planar multilayers can be avoided and accurate and rigorous solutions are obtained in explicit form. In the analysis, some numerical examples are obtained and comparison results are obtained to check the validity and accuracy. The new solution procedure serves as an alternative approach for evaluating the Sommerfeld integrals, for validating these approximate solutions from some well-known numerical approaches such as steepest saddle-point method, branch cut method and curve fitting approximations, and for setting a unified solution to the same problem of where various different solutions exist in literature.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133199199","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888780
C. Shao, Jian‐Xin Chen, H. Tang, Li-Heng Zhou, H. Chu
In this paper, two compact low temperature co-fired ceramic (LTCC) bandpass filters (BPFs) based on multi-layer distributed-element resonator are proposed. The employed half-wavelength (λg/2) resonator has been vertically folded to form a multi-layer transmission line resonator to minimize the circuit size significantly. Since there is a virtual ground in the symmetrical plane of the LTCC multi-layer resonator, the characteristic of the resonator keeps almost unchanged. For demonstration, a second-order BPF centered at 3.1GHz and a dual-mode BPF centered at 2.45GHz utilizing the proposed resonator are fabricated and measured, and the circuit sizes are 5.1×3.9×1.8 mm3 and 2.7×2.6×1.6mm3.
{"title":"LTCC bandpass filter based on distributed-element resonator","authors":"C. Shao, Jian‐Xin Chen, H. Tang, Li-Heng Zhou, H. Chu","doi":"10.1109/IWEM.2013.6888780","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888780","url":null,"abstract":"In this paper, two compact low temperature co-fired ceramic (LTCC) bandpass filters (BPFs) based on multi-layer distributed-element resonator are proposed. The employed half-wavelength (λg/2) resonator has been vertically folded to form a multi-layer transmission line resonator to minimize the circuit size significantly. Since there is a virtual ground in the symmetrical plane of the LTCC multi-layer resonator, the characteristic of the resonator keeps almost unchanged. For demonstration, a second-order BPF centered at 3.1GHz and a dual-mode BPF centered at 2.45GHz utilizing the proposed resonator are fabricated and measured, and the circuit sizes are 5.1×3.9×1.8 mm3 and 2.7×2.6×1.6mm3.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132429562","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888771
Lulu Wang, R. Simpkin, A. Al-Jumaily
Microwave imaging techniques for breast cancer detection have attacked many research groups recently. The key element for the microwave imaging system is the antenna. In this paper, a small flanged open-ended rectangular waveguide antenna (ORWA) is proposed for breast cancer detection. WR 62 waveguide which has cut-off frequency of 9.5 GHz is used in the design process. A 16-element antenna array plane is proposed for operation at a frequency of 12.6 GHz. Measurement and simulation results show that the designed single ORWA can obtain a return loss less than -60 dB at frequency of 12.12 GHz. The scattered field detection capability is also tested under our developed holographic microwave imaging array (HMIA) system for breast phantom detection. The experimental results show that the proposed ORWA has the ability to detect tumour as small as 2.5 mm within the breast phantom.
{"title":"Open-ended waveguide antenna for microwave breast cancer detection","authors":"Lulu Wang, R. Simpkin, A. Al-Jumaily","doi":"10.1109/IWEM.2013.6888771","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888771","url":null,"abstract":"Microwave imaging techniques for breast cancer detection have attacked many research groups recently. The key element for the microwave imaging system is the antenna. In this paper, a small flanged open-ended rectangular waveguide antenna (ORWA) is proposed for breast cancer detection. WR 62 waveguide which has cut-off frequency of 9.5 GHz is used in the design process. A 16-element antenna array plane is proposed for operation at a frequency of 12.6 GHz. Measurement and simulation results show that the designed single ORWA can obtain a return loss less than -60 dB at frequency of 12.12 GHz. The scattered field detection capability is also tested under our developed holographic microwave imaging array (HMIA) system for breast phantom detection. The experimental results show that the proposed ORWA has the ability to detect tumour as small as 2.5 mm within the breast phantom.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126070201","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888797
Wei He, Yejun He, H. Wong
A circularly polarized (CP) UHF RFID tag antenna is proposed in this paper. This antenna is realized by a meandering cross dipole. The meandering structure of the dipole could adjust amplitudes and phases from the two orthogonal arms of the cross dipole such that a CP frequency would be generated by the mutually-orthogonal mode. Therefore, we can achieve CP operation from the tag. The maximum transmitted power can be obtained when the input impedance of the tag is conjugate-match with the impedance of the RFID chip. A special matching structure is employed in this design to control the input impedance of the tag. This tag antenna is designed to cover whole UHF band (840-960 MHz), and its 3-dB axial-ratio (AR) bandwidth is 43 MHz (905-948 MHz).
{"title":"Meandering cross dipole antenna for RFID applications","authors":"Wei He, Yejun He, H. Wong","doi":"10.1109/IWEM.2013.6888797","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888797","url":null,"abstract":"A circularly polarized (CP) UHF RFID tag antenna is proposed in this paper. This antenna is realized by a meandering cross dipole. The meandering structure of the dipole could adjust amplitudes and phases from the two orthogonal arms of the cross dipole such that a CP frequency would be generated by the mutually-orthogonal mode. Therefore, we can achieve CP operation from the tag. The maximum transmitted power can be obtained when the input impedance of the tag is conjugate-match with the impedance of the RFID chip. A special matching structure is employed in this design to control the input impedance of the tag. This tag antenna is designed to cover whole UHF band (840-960 MHz), and its 3-dB axial-ratio (AR) bandwidth is 43 MHz (905-948 MHz).","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127577564","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888792
Shih-Cheng Lin, C. Hsieh, C. Chen
This study presents a direct-coupled bandpass filter with open-ended stubs based on composite right-left handed zeroth-order resonator (CRLH-ZOR). The design approach starts from the conventional bandpass filter on the foundation of admittance inverters and shunt open-ended stubs. The inverters which provide couplings between adjacent resonators are accomplished by direct-connected transmission lines equivalent to quarter-wave lines. The coupled-resonator method can be utilized for designing the interstage couplings by introducing a simple conversion. A balanced dual-plane CRLH TL open-ended on one side, serves as ZOR stub with shunt resonance is adopted as resonating components. By appropriately combing the direct-connected TLs and the ZOR open-ended stubs, a new dual-plane direct-coupled filter can be constructed. Specifically, a filter with center frequency of 1.5GHz and bandwidth of 32.05% is validated by theory and experiment. The experimental results are well-predicted by full-wave simulations.
{"title":"Dual-plane direct-coupled bandpass filters with open-ended stubs based on CRLH zeroth-order resonators","authors":"Shih-Cheng Lin, C. Hsieh, C. Chen","doi":"10.1109/IWEM.2013.6888792","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888792","url":null,"abstract":"This study presents a direct-coupled bandpass filter with open-ended stubs based on composite right-left handed zeroth-order resonator (CRLH-ZOR). The design approach starts from the conventional bandpass filter on the foundation of admittance inverters and shunt open-ended stubs. The inverters which provide couplings between adjacent resonators are accomplished by direct-connected transmission lines equivalent to quarter-wave lines. The coupled-resonator method can be utilized for designing the interstage couplings by introducing a simple conversion. A balanced dual-plane CRLH TL open-ended on one side, serves as ZOR stub with shunt resonance is adopted as resonating components. By appropriately combing the direct-connected TLs and the ZOR open-ended stubs, a new dual-plane direct-coupled filter can be constructed. Specifically, a filter with center frequency of 1.5GHz and bandwidth of 32.05% is validated by theory and experiment. The experimental results are well-predicted by full-wave simulations.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132791753","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888751
H. Arai
This talk presents antenna systems for high power applications to test electric equipment and discuss the issues of measurement facilities. Before releasing new electrical products, EMS (Electromagnetic susceptibility) tests are required to verify whether EUT (Equipment under test) causes the malfunction by a peripheral electromagnetic radiation. The EMS test needs to irradiate EUTs by high electric field in wide frequency range inside anechoic chamber. A problem in this facility is the antenna size in HF band, because the limited chamber space forces to design electrically small antenna with high power handling capability. In addition, EUTs under test are placed in the vicinity of the antenna, it is necessary to predict electric near field distributions. The antenna design for this application, this talk presents a multi-element folded dipole antenna in HF band and a pyramidal horn antenna in UHF band. The technique of antenna parameter optimization to provide high electric field at EUT is discussed in detail. The second topic of antennas for high power applications is the anechoic chamber design including with very small reflection from absorbers. Anechoic chambers do not provide artificial free space for antenna measurements. Small reflections from absorbers generate standing waves inside chamber and change the estimated electric field distributions inside chambers. The antenna design including small reflections from absorbers is also discussed to optimize EMS antennas.
{"title":"Keynote speaker 1: Antennas for high power applications","authors":"H. Arai","doi":"10.1109/IWEM.2013.6888751","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888751","url":null,"abstract":"This talk presents antenna systems for high power applications to test electric equipment and discuss the issues of measurement facilities. Before releasing new electrical products, EMS (Electromagnetic susceptibility) tests are required to verify whether EUT (Equipment under test) causes the malfunction by a peripheral electromagnetic radiation. The EMS test needs to irradiate EUTs by high electric field in wide frequency range inside anechoic chamber. A problem in this facility is the antenna size in HF band, because the limited chamber space forces to design electrically small antenna with high power handling capability. In addition, EUTs under test are placed in the vicinity of the antenna, it is necessary to predict electric near field distributions. The antenna design for this application, this talk presents a multi-element folded dipole antenna in HF band and a pyramidal horn antenna in UHF band. The technique of antenna parameter optimization to provide high electric field at EUT is discussed in detail. The second topic of antennas for high power applications is the anechoic chamber design including with very small reflection from absorbers. Anechoic chambers do not provide artificial free space for antenna measurements. Small reflections from absorbers generate standing waves inside chamber and change the estimated electric field distributions inside chambers. The antenna design including small reflections from absorbers is also discussed to optimize EMS antennas.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131132482","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888784
Haotian Zhu, Q. Tang, L. Chiu, Q. Xue, S. Pang
A coplanar waveguide with ground (CPWG) to dielectric ridge waveguide (DRW) transition is proposed and investigated. The proposed transition consists of two parts for the analysis, and they are the CPWG to Microstrip line transition and the Microstrip line to DRW transition. The mechanism of the transition and the electromagnetic (EM) field distributions are given in this paper. Attenuation analysis's of the DRW, CPWG, and CPW are presented in this paper. With full-wave EM simulation, the insertion loss of a back-to-back transition is around 5 dB at 0.3THz.
{"title":"Design of a broadband CPWG to dielectric ridge waveguide transition for terahertz circuits","authors":"Haotian Zhu, Q. Tang, L. Chiu, Q. Xue, S. Pang","doi":"10.1109/IWEM.2013.6888784","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888784","url":null,"abstract":"A coplanar waveguide with ground (CPWG) to dielectric ridge waveguide (DRW) transition is proposed and investigated. The proposed transition consists of two parts for the analysis, and they are the CPWG to Microstrip line transition and the Microstrip line to DRW transition. The mechanism of the transition and the electromagnetic (EM) field distributions are given in this paper. Attenuation analysis's of the DRW, CPWG, and CPW are presented in this paper. With full-wave EM simulation, the insertion loss of a back-to-back transition is around 5 dB at 0.3THz.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123757386","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 : 2013-08-01DOI: 10.1109/IWEM.2013.6888782
Yu-Zhe Zhang, Wai-Lon Chio, Wen-Yao Zhuang, Wai‐Wa Choi, K. Tam
In this paper double equilateral U-shaped defected ground structure (DGS) units are applied to relize a size reduced microstrip crossover for Butler matrix application. By embedding the DGS units the size of the microstrip crossover at 900 MHz can be reduced by 14.6% compare to conventional design.
{"title":"Size reduction of microstrip crossover using defected ground structure and its application in butler matrix","authors":"Yu-Zhe Zhang, Wai-Lon Chio, Wen-Yao Zhuang, Wai‐Wa Choi, K. Tam","doi":"10.1109/IWEM.2013.6888782","DOIUrl":"https://doi.org/10.1109/IWEM.2013.6888782","url":null,"abstract":"In this paper double equilateral U-shaped defected ground structure (DGS) units are applied to relize a size reduced microstrip crossover for Butler matrix application. By embedding the DGS units the size of the microstrip crossover at 900 MHz can be reduced by 14.6% compare to conventional design.","PeriodicalId":119627,"journal":{"name":"2013 IEEE International Workshop on Electromagnetics, Applications and Student Innovation Competition","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125498613","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：