Pub Date : 2012-10-01DOI: 10.23919/EUMC.2012.6459193
L. Pelliccia, F. Cacciamani, R. Sorrentino, P. Farinelli, P. Ligander, O. Persson
This paper presents the first experimental results of innovative MEMS-tunable waveguide filters showing very high Q (>;1000) in K-band. Ohmic RF-MEMS cantilever switches are used to connect printed line sections placed over the side wall of a TE101 mode cavity so realising an equivalent movable inner wall. The effective width of the cavity, thus its resonant frequency, can so be changed by activating the MEMS switches. Such a configuration is shown to yield a frequency tuning range up to 3% with unloaded Qs of the order of 1000 and negligible bandwidth variations (<; 10%). Measurements of a 23 GHz cavity show 730 MHz frequency shift (3.1%) with Qs of 750 and 1450 depending on the MEMS state. K-band 4th order filters have also been designed and fabricated. The experimental results are very promising both in terms of IL (i.e. unloaded Q) and robustness of the filter response after tuning.
{"title":"High-Q MEMS-tunable waveguide filters in K-band","authors":"L. Pelliccia, F. Cacciamani, R. Sorrentino, P. Farinelli, P. Ligander, O. Persson","doi":"10.23919/EUMC.2012.6459193","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459193","url":null,"abstract":"This paper presents the first experimental results of innovative MEMS-tunable waveguide filters showing very high Q (>;1000) in K-band. Ohmic RF-MEMS cantilever switches are used to connect printed line sections placed over the side wall of a TE101 mode cavity so realising an equivalent movable inner wall. The effective width of the cavity, thus its resonant frequency, can so be changed by activating the MEMS switches. Such a configuration is shown to yield a frequency tuning range up to 3% with unloaded Qs of the order of 1000 and negligible bandwidth variations (<; 10%). Measurements of a 23 GHz cavity show 730 MHz frequency shift (3.1%) with Qs of 750 and 1450 depending on the MEMS state. K-band 4th order filters have also been designed and fabricated. The experimental results are very promising both in terms of IL (i.e. unloaded Q) and robustness of the filter response after tuning.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130742385","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.2012.6459099
Shyh-Jong Chung, Hsiao-Ning Wang
Integration of devices is a trend of modern RF front-end design. To shrink the required area and enhance overall performance, the passive components can be co-designed into an antenna to deliver a so-called multi-function antenna, possessing not only the function of radiation but also filtering, impedance matching, and/or balanced-to-unbalanced transforming. In this paper, we presented the design of such a multi-function antenna based on a typical filter synthesis process. In the approach, the antenna serves as the last-stage resonator and load of a filter, while circuit resonators embedded in the antenna structure behave as the filter's front stages. Without increasing circuit area and sacrificing antenna gain, the accomplished antenna exhibits better band-edge selectivity and flat passband response. Several design examples will be addressed.
{"title":"Compact multi-function antennas designed using filter synthesis technique","authors":"Shyh-Jong Chung, Hsiao-Ning Wang","doi":"10.23919/EUMC.2012.6459099","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459099","url":null,"abstract":"Integration of devices is a trend of modern RF front-end design. To shrink the required area and enhance overall performance, the passive components can be co-designed into an antenna to deliver a so-called multi-function antenna, possessing not only the function of radiation but also filtering, impedance matching, and/or balanced-to-unbalanced transforming. In this paper, we presented the design of such a multi-function antenna based on a typical filter synthesis process. In the approach, the antenna serves as the last-stage resonator and load of a filter, while circuit resonators embedded in the antenna structure behave as the filter's front stages. Without increasing circuit area and sacrificing antenna gain, the accomplished antenna exhibits better band-edge selectivity and flat passband response. Several design examples will be addressed.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134136958","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.2012.6459409
J. Martens
Because of low direct power detection sensitivities in the higher mm-wave ranges and the high multiplier orders typically used, accurate and stable leveled power control in this frequency range is challenging. Through more careful leveling modeling in the case of higher order multipliers under various detection schemes, one can better study structural effects on instantaneous power accuracy. Simulation and measurements showed that a real-time, post-multiplier detection method with adequate dynamic gain control was capable of instantaneous accuracy improvements of one to nearly 10 dB (depending on configuration) in the WR-2.2 band over a sampled approach and over a pre-multiplier detection method.
{"title":"Improved power leveling in mm-wave/sub-THz systems","authors":"J. Martens","doi":"10.23919/EUMC.2012.6459409","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459409","url":null,"abstract":"Because of low direct power detection sensitivities in the higher mm-wave ranges and the high multiplier orders typically used, accurate and stable leveled power control in this frequency range is challenging. Through more careful leveling modeling in the case of higher order multipliers under various detection schemes, one can better study structural effects on instantaneous power accuracy. Simulation and measurements showed that a real-time, post-multiplier detection method with adequate dynamic gain control was capable of instantaneous accuracy improvements of one to nearly 10 dB (depending on configuration) in the WR-2.2 band over a sampled approach and over a pre-multiplier detection method.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133524446","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.2012.6459262
N. Janssen, P. Smulders
Millimeter-wave reflectometry is a potentially interesting method to measure varying properties of human-skin tissue. With this method, an open-ended waveguide probe is used, which is pressed against the skin (or bandage), to measure the reflection coefficient in the millimeter-wave frequency band of 40-60 GHz. Thanks to todays low-cost millimeter-wave silicon-based chip technology, this method could possibly be made available for massive usage in home-care situations. However, the measurement conditions in such situations might be ill-defined in the sense that parameters such as probe pressure and probeskin angle are not well controlled. In this paper, two candidate probe types are investigated as regards the sensitivity for probe pressure on the skin, probe-skin angle and layers of bandage between probe and skin. The probes considered are either with or without flange. The unflanged probe turns out to be the most promising candidate provided that careful calibration is possible despite the missing flange.
{"title":"Design of millimeter-wave probe for diagnosis of human skin","authors":"N. Janssen, P. Smulders","doi":"10.23919/EUMC.2012.6459262","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459262","url":null,"abstract":"Millimeter-wave reflectometry is a potentially interesting method to measure varying properties of human-skin tissue. With this method, an open-ended waveguide probe is used, which is pressed against the skin (or bandage), to measure the reflection coefficient in the millimeter-wave frequency band of 40-60 GHz. Thanks to todays low-cost millimeter-wave silicon-based chip technology, this method could possibly be made available for massive usage in home-care situations. However, the measurement conditions in such situations might be ill-defined in the sense that parameters such as probe pressure and probeskin angle are not well controlled. In this paper, two candidate probe types are investigated as regards the sensitivity for probe pressure on the skin, probe-skin angle and layers of bandage between probe and skin. The probes considered are either with or without flange. The unflanged probe turns out to be the most promising candidate provided that careful calibration is possible despite the missing flange.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132575578","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.2012.6459270
S. Cobos-Bandera, J. Sánchez-Martínez, E. Márquez-Segura
A MEMS-based reconfigurable test-set for differential and common mode S-parameters measurement, using a two-port network analyzer as a host instrument, is presented. The test-set uses discrete packaged MEMS switches to provide reconfigurable paths for common and differential mode separately. Therefore, this system is suitable for measurements of differential circuits without making multiple connections, avoiding some of the uncertainties derived from the reconnecting of the ports. In addition, the results of a de-embedding technique are presented in order to assess the performance of the test-set.
{"title":"MEMS-based reconfigurable test-set for differential and common mode measurement using a two-port network analyzer","authors":"S. Cobos-Bandera, J. Sánchez-Martínez, E. Márquez-Segura","doi":"10.23919/EUMC.2012.6459270","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459270","url":null,"abstract":"A MEMS-based reconfigurable test-set for differential and common mode S-parameters measurement, using a two-port network analyzer as a host instrument, is presented. The test-set uses discrete packaged MEMS switches to provide reconfigurable paths for common and differential mode separately. Therefore, this system is suitable for measurements of differential circuits without making multiple connections, avoiding some of the uncertainties derived from the reconnecting of the ports. In addition, the results of a de-embedding technique are presented in order to assess the performance of the test-set.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116503088","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.2012.6459080
A. Rumiantsev, R. Doerner, F. Lenk
This paper investigates the impact of possible parameter extraction errors caused by inaccurate definition of the calibration reference impedance of in-situ multiline TRL. Two calibration sets implemented on GaAs and Si/SiGe:C wafer processes were quantitatively analyzed. Obtained results demonstrated that for most practical cases, the desired 5%-level of confidence of extracted parameters of high-reflective devices can easily be achieved without additional efforts. Thus, implementation of the in-situ TRL into a characterization workflow of high-performance microwave devices can be significantly simplified.
{"title":"Impact of in-situ TRL reference impedance determination on parameter extraction","authors":"A. Rumiantsev, R. Doerner, F. Lenk","doi":"10.23919/EUMC.2012.6459080","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459080","url":null,"abstract":"This paper investigates the impact of possible parameter extraction errors caused by inaccurate definition of the calibration reference impedance of in-situ multiline TRL. Two calibration sets implemented on GaAs and Si/SiGe:C wafer processes were quantitatively analyzed. Obtained results demonstrated that for most practical cases, the desired 5%-level of confidence of extracted parameters of high-reflective devices can easily be achieved without additional efforts. Thus, implementation of the in-situ TRL into a characterization workflow of high-performance microwave devices can be significantly simplified.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128590889","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.2012.6459293
R. Juenemann
This paper describes a patch antenna excited by two slots suitable for state of the art multilayer integration. Instead of having two different ports feeding the slots, they form part of a 3-line-system able to guide an even- or odd-mode. It is shown that the even-mode excites a horizontal and the odd-mode a vertical polarisation. Taking into account that any circular polarisation can be composed from two orthogonal linear polarisations, the antenna is proved to be also excitable for left handed and right handed circular polarisation. Feeding the 3-line-system with a MMIC responsible for all amplitude and phase adjustments, thus saving space and cost, makes this antenna attractive for being used in large arrays. The particular antenna is designed for later use in a microwave imaging system centered at 75 GHz.
{"title":"Patch antenna fed by a 3 line system for dual orthogonal linear and circular polarisation","authors":"R. Juenemann","doi":"10.23919/EUMC.2012.6459293","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459293","url":null,"abstract":"This paper describes a patch antenna excited by two slots suitable for state of the art multilayer integration. Instead of having two different ports feeding the slots, they form part of a 3-line-system able to guide an even- or odd-mode. It is shown that the even-mode excites a horizontal and the odd-mode a vertical polarisation. Taking into account that any circular polarisation can be composed from two orthogonal linear polarisations, the antenna is proved to be also excitable for left handed and right handed circular polarisation. Feeding the 3-line-system with a MMIC responsible for all amplitude and phase adjustments, thus saving space and cost, makes this antenna attractive for being used in large arrays. The particular antenna is designed for later use in a microwave imaging system centered at 75 GHz.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134228040","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.2012.6459397
Ki Young Kim, Young-Ho Ryu, Eunseok Park, Nam Yoon Kim, Jinsung Choi, Dong-Zo Kim, Changwook Yoon, Keum-Su Song, C. Ahn, Yun-Kwon Park, Sangwook Kwon
Power transfer efficiencies of magnetic resonance wireless power link including a relay resonator that is not aligned with the source and device resonators are reported. Based on the properties of power transfer efficiencies for misalignments of two resonators with no relay, it is possible to explain the peculiar properties in power transfer efficiency for the cases with relay resonator misaligned. All the theoretical predictions have been confirmed by measurement results, both of which are in good agreement. Some interesting phenomena in power transfer efficiency have been pointed out and discussed.
{"title":"Power transfer efficiency of magnetic resonance wireless power link with misaligned relay resonator","authors":"Ki Young Kim, Young-Ho Ryu, Eunseok Park, Nam Yoon Kim, Jinsung Choi, Dong-Zo Kim, Changwook Yoon, Keum-Su Song, C. Ahn, Yun-Kwon Park, Sangwook Kwon","doi":"10.23919/EUMC.2012.6459397","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459397","url":null,"abstract":"Power transfer efficiencies of magnetic resonance wireless power link including a relay resonator that is not aligned with the source and device resonators are reported. Based on the properties of power transfer efficiencies for misalignments of two resonators with no relay, it is possible to explain the peculiar properties in power transfer efficiency for the cases with relay resonator misaligned. All the theoretical predictions have been confirmed by measurement results, both of which are in good agreement. Some interesting phenomena in power transfer efficiency have been pointed out and discussed.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134473920","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.2012.6459257
M. Hrobak, W. Stein, M. Sterns, M. Schramm, L. Schmidt
Triple balanced mixers (TBM) are ideally suited for use in heterodyne transceivers with great signal bandwidths. The design and construction of a hybrid broadband TBM based on commercial silicon crossed quad diodes is presented. Broadband planar baluns and the use of balanced edge and broadside coupled striplines allow for covering an RF / LO frequency range of 1 GHz to 35 GHz and at least 10 GHz IF bandwidth, if we claim for up- and downconversion loss values below 15 dB. This is achieved with local oscillator power levels PLO ∈ [10,14] dBm and an input 1 dB compression point of 6 dBm. The paper includes spectral measurement data which are in reasonable agreement with the simulation results that are based on a co-simulation procedure between 3D electromagnetic field (EM) simulations and nonlinear harmonic balance circuit simulations.
{"title":"A hybrid broadband microwave triple balanced mixer based on silicon crossed quad diodes","authors":"M. Hrobak, W. Stein, M. Sterns, M. Schramm, L. Schmidt","doi":"10.23919/EUMC.2012.6459257","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459257","url":null,"abstract":"Triple balanced mixers (TBM) are ideally suited for use in heterodyne transceivers with great signal bandwidths. The design and construction of a hybrid broadband TBM based on commercial silicon crossed quad diodes is presented. Broadband planar baluns and the use of balanced edge and broadside coupled striplines allow for covering an RF / LO frequency range of 1 GHz to 35 GHz and at least 10 GHz IF bandwidth, if we claim for up- and downconversion loss values below 15 dB. This is achieved with local oscillator power levels PLO ∈ [10,14] dBm and an input 1 dB compression point of 6 dBm. The paper includes spectral measurement data which are in reasonable agreement with the simulation results that are based on a co-simulation procedure between 3D electromagnetic field (EM) simulations and nonlinear harmonic balance circuit simulations.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134033815","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.2012.6459389
K. Ichinose, F. Kuroki
An NRD-guide pulse radar front-end was fabricated as a short range sensor at millimeter wave lengths, and the distance and velocity detections were successfully performed. A-D converters are usually used to precisely detect the target information. They however become expensive for short range applications using narrow pulse widths because they need high speed operation using sampling clocks with higher pulse repetition frequencies to satisfy the sampling theorem. To reduce the cost of the digital signal processing circuits, we applied a manner that the reflected pulse trains are easily converted into digital signals using sampling clocks with lower pulse repetition frequencies based on the sequential sampling technique. The detection of the target information was successfully performed by the cost-effective procedure by the NRD guide pulse radar system at 60 GHz license-free band in Japan.
{"title":"A cost-effective A-D converting technique on NRD guide pulse radar system at 60 GHz","authors":"K. Ichinose, F. Kuroki","doi":"10.23919/EUMC.2012.6459389","DOIUrl":"https://doi.org/10.23919/EUMC.2012.6459389","url":null,"abstract":"An NRD-guide pulse radar front-end was fabricated as a short range sensor at millimeter wave lengths, and the distance and velocity detections were successfully performed. A-D converters are usually used to precisely detect the target information. They however become expensive for short range applications using narrow pulse widths because they need high speed operation using sampling clocks with higher pulse repetition frequencies to satisfy the sampling theorem. To reduce the cost of the digital signal processing circuits, we applied a manner that the reflected pulse trains are easily converted into digital signals using sampling clocks with lower pulse repetition frequencies based on the sequential sampling technique. The detection of the target information was successfully performed by the cost-effective procedure by the NRD guide pulse radar system at 60 GHz license-free band in Japan.","PeriodicalId":266910,"journal":{"name":"2012 42nd European Microwave Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133952520","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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