Pub Date : 2002-08-07DOI: 10.1109/MIKON.2002.1017876
B. Givot, J. Krupka, K. Derzakowski
This paper describes a new construction of a 20-25 GHz split post dielectric resonator. The dielectric parts of the resonator are made out of single crystal YAG, and an unloaded Q-factor value of about 5000 has been obtained. It has been proven, that using such resonators, it is possible to measure permittivity with an uncertainty of approximately 0.5%, and dielectric loss tangents with a resolution of 5/spl times/10/sup -5/ for laminar dielectric specimens.
{"title":"Split-post dielectric resonator for complex permittivity measurements at 20-25 GHz","authors":"B. Givot, J. Krupka, K. Derzakowski","doi":"10.1109/MIKON.2002.1017876","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017876","url":null,"abstract":"This paper describes a new construction of a 20-25 GHz split post dielectric resonator. The dielectric parts of the resonator are made out of single crystal YAG, and an unloaded Q-factor value of about 5000 has been obtained. It has been proven, that using such resonators, it is possible to measure permittivity with an uncertainty of approximately 0.5%, and dielectric loss tangents with a resolution of 5/spl times/10/sup -5/ for laminar dielectric specimens.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129760449","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017871
K. Górecki, W. J. Stepowicz, J. Chramiec, J. Zarebski
Temperature influences strongly the electrical behaviour of semiconductor devices, affecting their d.c. characteristics as well as small and large-signal parameters. To determine the junction temperature under thermal steady-state conditions, its thermal resistance has to be known. This paper describes briefly the experimental set-up and procedures developed at the GMA which permit such characterisation of various semiconductor devices including microwave types. As shown in the experimental example, high sensitivity and accuracy of the presented method enables comparative measurements, yielding the thermal resistance value of microwave planar mounting structures.
{"title":"Thermal resistance measurements of microwave devices","authors":"K. Górecki, W. J. Stepowicz, J. Chramiec, J. Zarebski","doi":"10.1109/MIKON.2002.1017871","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017871","url":null,"abstract":"Temperature influences strongly the electrical behaviour of semiconductor devices, affecting their d.c. characteristics as well as small and large-signal parameters. To determine the junction temperature under thermal steady-state conditions, its thermal resistance has to be known. This paper describes briefly the experimental set-up and procedures developed at the GMA which permit such characterisation of various semiconductor devices including microwave types. As shown in the experimental example, high sensitivity and accuracy of the presented method enables comparative measurements, yielding the thermal resistance value of microwave planar mounting structures.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129772743","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017805
T. Żak, K. Sachse
The elements of the matrix - 3 dB/90/spl deg/ coupled-line directional couplers and cross-overs - have been designed in multilayer technology, optimised and tested individually, and then merged to form the whole integrated 4 /spl times/ 4 Butler matrix. A good performance of the manufactured matrix, operating in the frequency band 2-4 GHz, encouraged us to design a four-channel amplifier with four input- and four output ports, in which monolithic amplifiers are surface-mounted into 50 /spl Omega/ microstrip lines connecting the input and output Butler matrices. Very promising experimental results are shown.
{"title":"An integrated Butler matrix in multi-layer technology for multi-port amplifier applications","authors":"T. Żak, K. Sachse","doi":"10.1109/MIKON.2002.1017805","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017805","url":null,"abstract":"The elements of the matrix - 3 dB/90/spl deg/ coupled-line directional couplers and cross-overs - have been designed in multilayer technology, optimised and tested individually, and then merged to form the whole integrated 4 /spl times/ 4 Butler matrix. A good performance of the manufactured matrix, operating in the frequency band 2-4 GHz, encouraged us to design a four-channel amplifier with four input- and four output ports, in which monolithic amplifiers are surface-mounted into 50 /spl Omega/ microstrip lines connecting the input and output Butler matrices. Very promising experimental results are shown.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128268180","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017950
K. Kulpa, M. Smolarczyk, A. Gorzelańczyk
To develop and to test different data processing algorithms for radar applications, a reliable raw radar data source is required. The most straightforward way for obtaining such data is to generate simulated data using specialized program tools. The presented radar signal simulator (RSS) is a Matlab program that can generate raw complex radar data based on supplied radar parameters and environmental data. The use of RSS for generating raw SAR data and for testing different SAR algorithms is also presented.
{"title":"Radar signal generator and its usage for SAR algorithm tests","authors":"K. Kulpa, M. Smolarczyk, A. Gorzelańczyk","doi":"10.1109/MIKON.2002.1017950","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017950","url":null,"abstract":"To develop and to test different data processing algorithms for radar applications, a reliable raw radar data source is required. The most straightforward way for obtaining such data is to generate simulated data using specialized program tools. The presented radar signal simulator (RSS) is a Matlab program that can generate raw complex radar data based on supplied radar parameters and environmental data. The use of RSS for generating raw SAR data and for testing different SAR algorithms is also presented.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128368261","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017870
A. Lewandowski, G. Kompa, W. Mwema, W. Wiatr
Presents a systematic nonlinear procedure for designing microwave oscillators utilising a nonlinear PHEMT model, the negative resistance approach and the describing function concept. The procedure is applied in the design of a 24 GHz oscillator which is then realised in hybrid technology. Measurement results show -6% shift in the frequency but an acceptable agreement in the output power. A detailed analysis shows that the frequency shift arises mainly from inadequate CAD models in the K-band, for the microstrip components employed in the design.
{"title":"A 24 GHz PHEMT-based oscillator","authors":"A. Lewandowski, G. Kompa, W. Mwema, W. Wiatr","doi":"10.1109/MIKON.2002.1017870","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017870","url":null,"abstract":"Presents a systematic nonlinear procedure for designing microwave oscillators utilising a nonlinear PHEMT model, the negative resistance approach and the describing function concept. The procedure is applied in the design of a 24 GHz oscillator which is then realised in hybrid technology. Measurement results show -6% shift in the frequency but an acceptable agreement in the output power. A detailed analysis shows that the frequency shift arises mainly from inadequate CAD models in the K-band, for the microstrip components employed in the design.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128645752","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017807
W. Kocanda, A. Rutkowski
The paper concerns a wideband direction finding (DF) device scanning an angular segment of the space. It contains a quasi-circular antenna array and planar microwave amplitude-to-phase converter (APC). Such a structure performs a quasi amplitude method of estimation of direction of signal arrival. An experimental version of the device works in conjunction with a microwave phase discriminator (MPD) and personal computer (PC). This set has been successfully used to determine the angle of arrival (AOA) of signals over the L band. The device architecture and results of experiments are presented.
{"title":"Direction finding device with quasi-circular antenna array","authors":"W. Kocanda, A. Rutkowski","doi":"10.1109/MIKON.2002.1017807","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017807","url":null,"abstract":"The paper concerns a wideband direction finding (DF) device scanning an angular segment of the space. It contains a quasi-circular antenna array and planar microwave amplitude-to-phase converter (APC). Such a structure performs a quasi amplitude method of estimation of direction of signal arrival. An experimental version of the device works in conjunction with a microwave phase discriminator (MPD) and personal computer (PC). This set has been successfully used to determine the angle of arrival (AOA) of signals over the L band. The device architecture and results of experiments are presented.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124640984","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017814
A. Ciminski
Artificial Neural Networks (ANN) have recently gained attention as a fast and flexible vehicle for microwave modeling, simulation and optimization. This paper presents an example of ANN usefulness in microwave filter design process. The filter consists of four segments. Every segment is represented by electromagnetically trained neural network model (EM-ANN). Furthermore EM-ANN model maps a set of scattering parameters of coupled microstrip lines (CML) in terms of its geometric dimensions. A comparison of results from different simulation methods and measurements has been presented.
{"title":"Artificial neural networks modeling for computer-aided design of microwave filter","authors":"A. Ciminski","doi":"10.1109/MIKON.2002.1017814","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017814","url":null,"abstract":"Artificial Neural Networks (ANN) have recently gained attention as a fast and flexible vehicle for microwave modeling, simulation and optimization. This paper presents an example of ANN usefulness in microwave filter design process. The filter consists of four segments. Every segment is represented by electromagnetically trained neural network model (EM-ANN). Furthermore EM-ANN model maps a set of scattering parameters of coupled microstrip lines (CML) in terms of its geometric dimensions. A comparison of results from different simulation methods and measurements has been presented.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123467043","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017984
M. Nojman
The radiating column for an IFF system made in SSL laminate technology is described. The method of designing and fabricating this type of antenna is presented. The numerical results obtained for the shaped pattern are compared with experimental data.
{"title":"The radiating column in SSL laminate technology with shaped pattern for L band","authors":"M. Nojman","doi":"10.1109/MIKON.2002.1017984","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017984","url":null,"abstract":"The radiating column for an IFF system made in SSL laminate technology is described. The method of designing and fabricating this type of antenna is presented. The numerical results obtained for the shaped pattern are compared with experimental data.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116153170","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017924
W. Wojtasiak, D. Gryglewski, T. Morawski, E. Sedek
The paper presents the concept and the performances of the L- and C-band T/R module for an active phased array radar (APAR). The transmitters were optimized for minimum transmittance distortions and maximum output power level. The method used was based on a self-invented electro-thermal MESFET model. The receivers were optimized with respect to the minimum noise figure and maximum resistance for the input power. The most important parameters of the T/R modules are as follows: L-band with P/sub out/ = 100 W, /spl Delta/|T|<0.1 dB, /spl delta//spl phi/<1/spl deg/, F<2.5dB; and C-band with P/sub out/ = 4 W, /spl Delta/|T|<0.1dB, /spl delta//spl phi/<0.2/spl deg/, F<2.5dB.
{"title":"Designing T/R module for active phased array radar","authors":"W. Wojtasiak, D. Gryglewski, T. Morawski, E. Sedek","doi":"10.1109/MIKON.2002.1017924","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017924","url":null,"abstract":"The paper presents the concept and the performances of the L- and C-band T/R module for an active phased array radar (APAR). The transmitters were optimized for minimum transmittance distortions and maximum output power level. The method used was based on a self-invented electro-thermal MESFET model. The receivers were optimized with respect to the minimum noise figure and maximum resistance for the input power. The most important parameters of the T/R modules are as follows: L-band with P/sub out/ = 100 W, /spl Delta/|T|<0.1 dB, /spl delta//spl phi/<1/spl deg/, F<2.5dB; and C-band with P/sub out/ = 4 W, /spl Delta/|T|<0.1dB, /spl delta//spl phi/<0.2/spl deg/, F<2.5dB.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"90 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114838552","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 : 2002-08-07DOI: 10.1109/MIKON.2002.1017988
A. Kręczkowski, T. Rutkowski, A. Buda, S. Kostka
The paper presents a model of a lightweight, self-supporting antenna with radiation pattern exclusively designed for the IFF system employed in airborne radar. The antenna utilizes aperture coupled rectangular patches as a sub-array element. The array antenna is realized to operate in a frequency bandwidth BW>6% with a VSWR below 1.5.
{"title":"The microstrip IFF antenna for the airborne radar","authors":"A. Kręczkowski, T. Rutkowski, A. Buda, S. Kostka","doi":"10.1109/MIKON.2002.1017988","DOIUrl":"https://doi.org/10.1109/MIKON.2002.1017988","url":null,"abstract":"The paper presents a model of a lightweight, self-supporting antenna with radiation pattern exclusively designed for the IFF system employed in airborne radar. The antenna utilizes aperture coupled rectangular patches as a sub-array element. The array antenna is realized to operate in a frequency bandwidth BW>6% with a VSWR below 1.5.","PeriodicalId":372054,"journal":{"name":"14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562)","volume":"270 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131949334","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：