Pub Date : 2012-08-06DOI: 10.1109/MWSYM.2012.6259709
M. Stuenkel, M. Feng
This paper presents a W-Band Push-Push VCO with a 64X static frequency divider, for a total frequency division of 128X, using InP/InGaAs DHBT technology. The oscillator operates around a center frequency of 77.75 GHz with a measured phase noise of < −94 dBc/Hz at a 1 MHz offset, and employs a unique tuning methodology that uses only the intrinsic parasitics of the DHBTs to give a tuning range of 1.3 GHz. The oscillator, which includes buffers to drive the divider chain, has a power dissipation of 84 mW, one of the lowest power dissipations reported for a III–V DHBT based push-push oscillator.
{"title":"A W-Band tunable Push-Push oscillator with 128X frequency division for frequency synthesis applications","authors":"M. Stuenkel, M. Feng","doi":"10.1109/MWSYM.2012.6259709","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259709","url":null,"abstract":"This paper presents a W-Band Push-Push VCO with a 64X static frequency divider, for a total frequency division of 128X, using InP/InGaAs DHBT technology. The oscillator operates around a center frequency of 77.75 GHz with a measured phase noise of < −94 dBc/Hz at a 1 MHz offset, and employs a unique tuning methodology that uses only the intrinsic parasitics of the DHBTs to give a tuning range of 1.3 GHz. The oscillator, which includes buffers to drive the divider chain, has a power dissipation of 84 mW, one of the lowest power dissipations reported for a III–V DHBT based push-push oscillator.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"37 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84633465","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 : 2012-08-06DOI: 10.1109/MWSYM.2012.6259541
M. Fice, E. Rouvalis, C. Renaud, A. Seeds
A wireless data communications link operating at a carrier frequency of 200 GHz and a data rate of 1 Gb/s is demonstrated. Photonic carrier generation and modulation was employed at the transmitter, with the optical signal converted to millimeter waves using a uni-traveling carrier photodiode. Heterodyne detection was used to demodulate the signal, the first time, to our knowledge, that this approach has been used for Gb/s data on a carrier above 100 GHz. Baseband data was recovered by offline processing of a sampled version of the intermediate frequency signal captured by a real-time oscilloscope. A bit error ratio of 10−3, sufficient for reliable transmission with forward error correction, was obtained for a received power of approximately −52 dBm.
{"title":"1 Gb/s wireless link at 200 GHz using heterodyne detection","authors":"M. Fice, E. Rouvalis, C. Renaud, A. Seeds","doi":"10.1109/MWSYM.2012.6259541","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259541","url":null,"abstract":"A wireless data communications link operating at a carrier frequency of 200 GHz and a data rate of 1 Gb/s is demonstrated. Photonic carrier generation and modulation was employed at the transmitter, with the optical signal converted to millimeter waves using a uni-traveling carrier photodiode. Heterodyne detection was used to demodulate the signal, the first time, to our knowledge, that this approach has been used for Gb/s data on a carrier above 100 GHz. Baseband data was recovered by offline processing of a sampled version of the intermediate frequency signal captured by a real-time oscilloscope. A bit error ratio of 10−3, sufficient for reliable transmission with forward error correction, was obtained for a received power of approximately −52 dBm.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"9 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75395337","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 : 2012-08-06DOI: 10.1109/MWSYM.2012.6259410
M. Bakr
Over the years, Transmission Line Modeling (TLM) of high frequency structures has seen great advances. The pioneering work of Johns, Hoefer, Vahdlieck, and others have helped in making TLM a robust modeling approach. This paved the way for the most recent developments in TLM-based adjoint sensitivity analysis which is reviewed in this work. We show that using at most one extra TLM simulation, the first order sensitivities of an arbitrary objective function are obtained with respect to all parameters regardless of their number. The extra simulation can be eliminated for S-parameter sensitivity analysis. We also show that the sensitivities of complete transient responses can be estimated using also one adjoint simulation. TLM-based adjoint sensitivity analysis is illustrated through two examples.
{"title":"TLM-based time domain adjoint sensitivities: State of the art and outlook","authors":"M. Bakr","doi":"10.1109/MWSYM.2012.6259410","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259410","url":null,"abstract":"Over the years, Transmission Line Modeling (TLM) of high frequency structures has seen great advances. The pioneering work of Johns, Hoefer, Vahdlieck, and others have helped in making TLM a robust modeling approach. This paved the way for the most recent developments in TLM-based adjoint sensitivity analysis which is reviewed in this work. We show that using at most one extra TLM simulation, the first order sensitivities of an arbitrary objective function are obtained with respect to all parameters regardless of their number. The extra simulation can be eliminated for S-parameter sensitivity analysis. We also show that the sensitivities of complete transient responses can be estimated using also one adjoint simulation. TLM-based adjoint sensitivity analysis is illustrated through two examples.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"43 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86639926","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 : 2012-08-06DOI: 10.1109/MWSYM.2012.6259721
Ming Yu, Ying Wang
This paper is dedicated to the memory of Dr. Ruediger Vahldieck of the University of Victoria, Canada. The technical achievements reviewed herein were accomplished under Dr. Vahldieck's supervision. This research has been devoted to the development of accurate and efficient design algorithms for the analysis and design of MMIC's and MHMIC's. An overview of the SSDA is presented, which combines the advantages of the 1D Spectral Domain Method (SDM) and 1D Method of Lines (MoL). Besides calculation of resonance frequencies, SSDA has been extended to analyze equivalent circuit parameters and S-parameters of planar discontinuities using the deterministic quasi-static SSDA. The algorithms are proven to be highly efficient for the analysis of arbitrary planar discontinuities for applications in the design of MMIC's and MHMIC's.
{"title":"Overview of the research and applications of the space-spectral domain approach (SSDA)","authors":"Ming Yu, Ying Wang","doi":"10.1109/MWSYM.2012.6259721","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259721","url":null,"abstract":"This paper is dedicated to the memory of Dr. Ruediger Vahldieck of the University of Victoria, Canada. The technical achievements reviewed herein were accomplished under Dr. Vahldieck's supervision. This research has been devoted to the development of accurate and efficient design algorithms for the analysis and design of MMIC's and MHMIC's. An overview of the SSDA is presented, which combines the advantages of the 1D Spectral Domain Method (SDM) and 1D Method of Lines (MoL). Besides calculation of resonance frequencies, SSDA has been extended to analyze equivalent circuit parameters and S-parameters of planar discontinuities using the deterministic quasi-static SSDA. The algorithms are proven to be highly efficient for the analysis of arbitrary planar discontinuities for applications in the design of MMIC's and MHMIC's.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"471 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76694083","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 : 2012-08-06DOI: 10.1109/MWSYM.2012.6259592
B. Aja, M. Seelmann-Eggebert, A. Leuther, H. Massler, M. Schlechtweg, J. Gallego, I. López-Fernández, C. Diez, I. Malo, E. Villa, E. Artal
MMIC Broadband Low Noise Amplifiers (LNA) for radio astronomy applications with 100 nm GaAs metamorphic High Electron Mobility Transistor (mHEMT) process have been developed. Cryogenic performance of a 4–12 GHz and a 25–34 GHz LNAs is presented. The 4–12 GHz LNA cooled at 15 K exhibits an associated gain of 31.5 dB ± 1.8 dB and average noise temperature of 5.3 K with a low power dissipation of 8 mW. Cooled to 15 K the 25–34 GHz amplifier has demonstrated a flat gain of 24.2 dB ± 0.4 dB with 15.2 K average noise temperature, and a very low power dissipation of 2.8 mW on chip. The mHEMT based LNA MMICs have demonstrated excellent noise characteristics at cryogenic temperatures for their use in radio astronomy applications.
{"title":"4–12 GHz and 25–34 GHz cryogenic MHEMT MMIC Low Noise Amplifiers for radio astronomy","authors":"B. Aja, M. Seelmann-Eggebert, A. Leuther, H. Massler, M. Schlechtweg, J. Gallego, I. López-Fernández, C. Diez, I. Malo, E. Villa, E. Artal","doi":"10.1109/MWSYM.2012.6259592","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259592","url":null,"abstract":"MMIC Broadband Low Noise Amplifiers (LNA) for radio astronomy applications with 100 nm GaAs metamorphic High Electron Mobility Transistor (mHEMT) process have been developed. Cryogenic performance of a 4–12 GHz and a 25–34 GHz LNAs is presented. The 4–12 GHz LNA cooled at 15 K exhibits an associated gain of 31.5 dB ± 1.8 dB and average noise temperature of 5.3 K with a low power dissipation of 8 mW. Cooled to 15 K the 25–34 GHz amplifier has demonstrated a flat gain of 24.2 dB ± 0.4 dB with 15.2 K average noise temperature, and a very low power dissipation of 2.8 mW on chip. The mHEMT based LNA MMICs have demonstrated excellent noise characteristics at cryogenic temperatures for their use in radio astronomy applications.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"2 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75058785","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 : 2012-08-06DOI: 10.1109/MWSYM.2012.6259723
D. Ricketts, A. Hillenius
This paper presents the first demonstration of a dispersion-tapered reflection soliton oscillator (RS0). Prior soliton oscillators have relied on uniform nonlinear transmission lines (NLTLs) to self-generate electrical solitons. In this work we show that the stabilizing mechanisms for uniform NLTL soliton oscillators are sufficient to stabilize and self generate solitons using a dispersion-tapered NLTL. Moreover, we show that the dispersion-tapered NLTL provides a significant benefit in further sharpening the soliton pulses in the soliton oscillator. Through two experimental prototypes we demonstrate a 40 % difference in pulse width between the uniform NLTL RSO and the dispersion-tapered RSO introduced in this paper.
{"title":"A dispersion-tapered reflection soliton oscillator","authors":"D. Ricketts, A. Hillenius","doi":"10.1109/MWSYM.2012.6259723","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259723","url":null,"abstract":"This paper presents the first demonstration of a dispersion-tapered reflection soliton oscillator (RS0). Prior soliton oscillators have relied on uniform nonlinear transmission lines (NLTLs) to self-generate electrical solitons. In this work we show that the stabilizing mechanisms for uniform NLTL soliton oscillators are sufficient to stabilize and self generate solitons using a dispersion-tapered NLTL. Moreover, we show that the dispersion-tapered NLTL provides a significant benefit in further sharpening the soliton pulses in the soliton oscillator. Through two experimental prototypes we demonstrate a 40 % difference in pulse width between the uniform NLTL RSO and the dispersion-tapered RSO introduced in this paper.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"37 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73773323","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 : 2012-08-06DOI: 10.1109/MWSYM.2012.6259771
M. Hofmann, F. Trenz, R. Weigel, G. Fischer, D. Kissinger
This paper presents a novel parameterized Debye relaxation model for aqueous glucose solutions up to 40 GHz. The influence on all Debye relaxation parameters is given by three equations. A compact microwave demon- strator for concentration measurements, consisting of two directional couplers, a voltage controlled oscillator (VCO), a six-port-junction, power detectors and a signal processing board is introduced. A hybrid calibration procedure for the reflectometer based approach is applied, based on a linear five standard calibration and a three standard error-box model, respectively.
{"title":"A microwave sensing system for aqueous concentration measurements based on a microwave reflectometer","authors":"M. Hofmann, F. Trenz, R. Weigel, G. Fischer, D. Kissinger","doi":"10.1109/MWSYM.2012.6259771","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259771","url":null,"abstract":"This paper presents a novel parameterized Debye relaxation model for aqueous glucose solutions up to 40 GHz. The influence on all Debye relaxation parameters is given by three equations. A compact microwave demon- strator for concentration measurements, consisting of two directional couplers, a voltage controlled oscillator (VCO), a six-port-junction, power detectors and a signal processing board is introduced. A hybrid calibration procedure for the reflectometer based approach is applied, based on a linear five standard calibration and a three standard error-box model, respectively.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"17 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81502768","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 : 2012-06-17DOI: 10.1109/MWSYM.2012.6259729
J. R. G. Oya, A. Kwan, S. Bassam, Fernando Munoz, F. Ghannouchi
This paper presents an optimization of the noise performance for a dual band receiver based on subsampling in a nonlinear scenario. The focus is on designing a multiband receiver for software defined radio. Thus, another goal of the presented architecture is its flexibility, focusing on the jitter and folded noise optimization of the subsampling receiver and covering as many wireless standards as possible. To approach these objectives, different architectures based on subsampling technique are investigated and analyzed.
{"title":"Optimization of subsampling dual band receivers design in nonlinear systems","authors":"J. R. G. Oya, A. Kwan, S. Bassam, Fernando Munoz, F. Ghannouchi","doi":"10.1109/MWSYM.2012.6259729","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259729","url":null,"abstract":"This paper presents an optimization of the noise performance for a dual band receiver based on subsampling in a nonlinear scenario. The focus is on designing a multiband receiver for software defined radio. Thus, another goal of the presented architecture is its flexibility, focusing on the jitter and folded noise optimization of the subsampling receiver and covering as many wireless standards as possible. To approach these objectives, different architectures based on subsampling technique are investigated and analyzed.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"2020 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72783409","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 : 2012-06-17DOI: 10.1109/MWSYM.2012.6259555
Fei Yang, Hongxi Yu, Xinyang He, Ying Zhou, Ruitong Liu
Novel dual-band band-stop filter coupling networks are introduced in the paper. Based on the topology, the design of dual-band, triple-band and four-band band-stop filters are firstly proposed and synthesized. The entire multi-band band-stop filter can be designed on the bases of several Chebyshev filters, which is easy to be realized with a good property. By using Substrate Integrated Waveguide (SIW), a dual-band band-stop filter is first designed and fabricated. The test results agree well with the simulated ones and have a good performance.
{"title":"Novel multi-band filter design and Substrate Integrated Waveguide filter realization","authors":"Fei Yang, Hongxi Yu, Xinyang He, Ying Zhou, Ruitong Liu","doi":"10.1109/MWSYM.2012.6259555","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259555","url":null,"abstract":"Novel dual-band band-stop filter coupling networks are introduced in the paper. Based on the topology, the design of dual-band, triple-band and four-band band-stop filters are firstly proposed and synthesized. The entire multi-band band-stop filter can be designed on the bases of several Chebyshev filters, which is easy to be realized with a good property. By using Substrate Integrated Waveguide (SIW), a dual-band band-stop filter is first designed and fabricated. The test results agree well with the simulated ones and have a good performance.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"22 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75566036","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 : 2012-06-17DOI: 10.1109/MWSYM.2012.6259701
César Sánchéz-Perez, D. Sardin, M. Roberg, J. de Mingo, Z. Popovic
Load mismatch in RF high power amplifier leads to efficiency reduction or amplifier failure. Instead of impedance tuning, in this paper an outphasing architecture with a tunable non-isolated combiner is used to reduce sensitivity to load variations. Experimental results with two GaN class AB amplifiers at 2.14GHz show it is possible to maintain the efficiency above 50% over a wide range of impedances, while maintaining the output power within a few dB around 20W.
{"title":"Tunable outphasing for power amplifier efficiency improvement under load mismatch","authors":"César Sánchéz-Perez, D. Sardin, M. Roberg, J. de Mingo, Z. Popovic","doi":"10.1109/MWSYM.2012.6259701","DOIUrl":"https://doi.org/10.1109/MWSYM.2012.6259701","url":null,"abstract":"Load mismatch in RF high power amplifier leads to efficiency reduction or amplifier failure. Instead of impedance tuning, in this paper an outphasing architecture with a tunable non-isolated combiner is used to reduce sensitivity to load variations. Experimental results with two GaN class AB amplifiers at 2.14GHz show it is possible to maintain the efficiency above 50% over a wide range of impedances, while maintaining the output power within a few dB around 20W.","PeriodicalId":6385,"journal":{"name":"2012 IEEE/MTT-S International Microwave Symposium Digest","volume":"59 1","pages":"1-3"},"PeriodicalIF":0.0,"publicationDate":"2012-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74281510","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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