Pub Date : 2008-06-15DOI: 10.1109/MWSYM.2008.4633161
T. O'Sullivan, M. Urteaga, R. Pierson, P. Asbeck
In this paper a millimeter-wave power amplifier implemented using a planar radial type power splitter and combiner is presented. The amplifier achieves an unsaturated output power of 23 dBm at 71 GHz with a corresponding P1dB of 20.8 dBm. The radial layout for the combiner allows 4 unit amplifiers to be combined in a single stage of power combining with a compact layout. The amplifier is implemented using an InP HBT process with ft/fmax values of 300/300 GHz.
{"title":"InP HBT millimeter-wave power amplifier implemented using planar radial power combiner","authors":"T. O'Sullivan, M. Urteaga, R. Pierson, P. Asbeck","doi":"10.1109/MWSYM.2008.4633161","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4633161","url":null,"abstract":"In this paper a millimeter-wave power amplifier implemented using a planar radial type power splitter and combiner is presented. The amplifier achieves an unsaturated output power of 23 dBm at 71 GHz with a corresponding P1dB of 20.8 dBm. The radial layout for the combiner allows 4 unit amplifiers to be combined in a single stage of power combining with a compact layout. The amplifier is implemented using an InP HBT process with ft/fmax values of 300/300 GHz.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125713095","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4633306
A. Vergara, N. Petrochilos, O. Boric-Lubecke, A. Høst-Madsen, V. Lubecke
Direct conversion Doppler radar can provide remote non-invasive monitoring of cardio-pulmonary activity of human subjects. However, real world life signs monitoring requires real-time processing of data over long monitoring periods, during which it is unlikely that the subject can be expected to suppress other body motion. Measurement of cardiopulmonary motion of a human subject with extraneous subject movement in the field of view of a Doppler radar system is a complex problem. The use of multiple antennas and blind source separation signal processing techniques is a logical approach for monitoring humans in real world conditions. Described here is the successful separation of cardiopulmonary motion and hand motion for a single subject.
{"title":"Blind source separation of human body motion using direct conversion Doppler radar","authors":"A. Vergara, N. Petrochilos, O. Boric-Lubecke, A. Høst-Madsen, V. Lubecke","doi":"10.1109/MWSYM.2008.4633306","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4633306","url":null,"abstract":"Direct conversion Doppler radar can provide remote non-invasive monitoring of cardio-pulmonary activity of human subjects. However, real world life signs monitoring requires real-time processing of data over long monitoring periods, during which it is unlikely that the subject can be expected to suppress other body motion. Measurement of cardiopulmonary motion of a human subject with extraneous subject movement in the field of view of a Doppler radar system is a complex problem. The use of multiple antennas and blind source separation signal processing techniques is a logical approach for monitoring humans in real world conditions. Described here is the successful separation of cardiopulmonary motion and hand motion for a single subject.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120957393","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4633006
L. Hady, D. Kajfez, A. Kishk
A new concept of dual mode operation for oscillation and radiation characteristics using single dielectric resonator enclosed by modified rectangular cavity has been developed in this paper. High unloaded quality factor of 2700 at 2.54 GHz and omni-directional radiation patterns with radiation bandwidth of 5.13% around 3.31 GHz were achieved simultaneously. The high-Q mode is coupled to a microstrip line and the low-Q mode is coupled to a coaxial probe with capacitive plate. Measurements of the scattering parameters and of the radiating patterns were carried out to verify the simulation results.
{"title":"Dual function of a dielectric resonator: A high-Q resonator and a low-Q radiator","authors":"L. Hady, D. Kajfez, A. Kishk","doi":"10.1109/MWSYM.2008.4633006","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4633006","url":null,"abstract":"A new concept of dual mode operation for oscillation and radiation characteristics using single dielectric resonator enclosed by modified rectangular cavity has been developed in this paper. High unloaded quality factor of 2700 at 2.54 GHz and omni-directional radiation patterns with radiation bandwidth of 5.13% around 3.31 GHz were achieved simultaneously. The high-Q mode is coupled to a microstrip line and the low-Q mode is coupled to a coaxial probe with capacitive plate. Measurements of the scattering parameters and of the radiating patterns were carried out to verify the simulation results.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114930815","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4632984
A. Traille, Li Yang, A. Rida, M. Tentzeris
The performance of the most commonly used metal antennas close to the human body is one of the limiting factors of the performance of bio-sensors and wireless body area networks (WBAN). Due to the high dielectric and conductivity contrast with respect to most parts of the human body (blood, skin, …), the range of most of the wireless sensors operating in RF and microwave frequencies is limited to 1–2 cm when attached to the body. In this paper, we introduce the very novel idea of liquid antennas, that is based on engineering the properties of liquids. This approach allows for the improvement of the range by a factor of 5–10 in a very easy-to-realize way, just modifying the salinity of the aqueous solution of the antenna. A similar methodology can be extended to the development of liquid RF electronics for implantable devices and wearable real-time bio-signal monitoring, since it can potentially lead to very flexible antenna and electronic configurations.
{"title":"A novel liquid antenna for wearable bio-monitoring applications","authors":"A. Traille, Li Yang, A. Rida, M. Tentzeris","doi":"10.1109/MWSYM.2008.4632984","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4632984","url":null,"abstract":"The performance of the most commonly used metal antennas close to the human body is one of the limiting factors of the performance of bio-sensors and wireless body area networks (WBAN). Due to the high dielectric and conductivity contrast with respect to most parts of the human body (blood, skin, …), the range of most of the wireless sensors operating in RF and microwave frequencies is limited to 1–2 cm when attached to the body. In this paper, we introduce the very novel idea of liquid antennas, that is based on engineering the properties of liquids. This approach allows for the improvement of the range by a factor of 5–10 in a very easy-to-realize way, just modifying the salinity of the aqueous solution of the antenna. A similar methodology can be extended to the development of liquid RF electronics for implantable devices and wearable real-time bio-signal monitoring, since it can potentially lead to very flexible antenna and electronic configurations.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"144 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116607009","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4632999
J. Rayas-Sánchez, V. Gutiérrez-Ayala
We propose in this work a general procedure to efficient EM-based design of single-layer SIW interconnects, including their transitions to microstrip lines. Our starting point is developed by exploiting available empirical knowledge for SIW. We propose an efficient SIW surrogate model for direct EM design optimization in two stages: first optimizing the SIW width to achieve the specified low cutoff frequency, followed by the transition optimization to reduce reflections and extend the dominant mode bandwidth. Our procedure is illustrated by designing a SIW interconnect on a standard FR4-based substrate.
{"title":"A general EM-based design procedure for single-layer substrate integrated waveguide interconnects with microstrip transitions","authors":"J. Rayas-Sánchez, V. Gutiérrez-Ayala","doi":"10.1109/MWSYM.2008.4632999","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4632999","url":null,"abstract":"We propose in this work a general procedure to efficient EM-based design of single-layer SIW interconnects, including their transitions to microstrip lines. Our starting point is developed by exploiting available empirical knowledge for SIW. We propose an efficient SIW surrogate model for direct EM design optimization in two stages: first optimizing the SIW width to achieve the specified low cutoff frequency, followed by the transition optimization to reduce reflections and extend the dominant mode bandwidth. Our procedure is illustrated by designing a SIW interconnect on a standard FR4-based substrate.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131164319","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4633048
P. Cruz, N. Carvalho, K. Remley
This paper characterizes nonlinear distortion in an analog-to-digital converter (ADC) when excited by representative communication signals having non-constant time-domain envelopes. The effect of subjecting the ADC to signals that present a range of values of peak-to-average power ratio is studied in order to understand the impact of various nonlinear ADC mechanisms in the transmission chain.
{"title":"Evaluation of Nonlinear distortion in ADCs using multisines","authors":"P. Cruz, N. Carvalho, K. Remley","doi":"10.1109/MWSYM.2008.4633048","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4633048","url":null,"abstract":"This paper characterizes nonlinear distortion in an analog-to-digital converter (ADC) when excited by representative communication signals having non-constant time-domain envelopes. The effect of subjecting the ADC to signals that present a range of values of peak-to-average power ratio is studied in order to understand the impact of various nonlinear ADC mechanisms in the transmission chain.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132101871","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4633144
A. Lau, D. Jackson, J. Williams, F. Mesa, J. Bernal
The currents induced on overhead power lines and the subsequent fields from them are studied for a high frequency “broadband over power line” (BPL) source. The physical properties of the fields are studied, and the level of the fields is examined to determine the significance of the fields from BPL sources on power lines.
{"title":"Investigation of fields and currents for broadband over power line (BPL) communications","authors":"A. Lau, D. Jackson, J. Williams, F. Mesa, J. Bernal","doi":"10.1109/MWSYM.2008.4633144","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4633144","url":null,"abstract":"The currents induced on overhead power lines and the subsequent fields from them are studied for a high frequency “broadband over power line” (BPL) source. The physical properties of the fields are studied, and the level of the fields is examined to determine the significance of the fields from BPL sources on power lines.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134624895","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4632908
S. Bastioli, L. Marcaccioli, R. Sorrentino
This paper presents a novel resonant structure for the design of compact pseudo-elliptic filters in waveguide technology. The resonator consists of a rectangular ridge which is arbitrarily located and oriented within a rectangular waveguide. Under certain conditions, by exciting the ridge with the fundamental TE10 mode of the waveguide, the resonator exhibits a transmission zero besides the transmission pole, thus behaving as a singlet. This element can be used as a basic building block for the design of higher order filters. In this work an in-line 5th order filter with three transmission zeros has been fabricated and tested, demonstrating the feasibility of the proposed design.
{"title":"Novel waveguide pseudo-elliptic filters using slant ridge resonators","authors":"S. Bastioli, L. Marcaccioli, R. Sorrentino","doi":"10.1109/MWSYM.2008.4632908","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4632908","url":null,"abstract":"This paper presents a novel resonant structure for the design of compact pseudo-elliptic filters in waveguide technology. The resonator consists of a rectangular ridge which is arbitrarily located and oriented within a rectangular waveguide. Under certain conditions, by exciting the ridge with the fundamental TE10 mode of the waveguide, the resonator exhibits a transmission zero besides the transmission pole, thus behaving as a singlet. This element can be used as a basic building block for the design of higher order filters. In this work an in-line 5th order filter with three transmission zeros has been fabricated and tested, demonstrating the feasibility of the proposed design.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133368584","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4633219
L. Vardapetyan, J. Manges, Z. Cendes
Sensitivity analysis of microwave devices with respect to design parameters is presented. Ports are included in the computational domain via the Transfinite Element Method. The derivative of the system matrix is computed analytically. In particular, derivatives of the system matrix entries that depend on ports are obtained by analytical differentiation of the port eigenvalue problem. Numerical examples confirm the effectiveness of the proposed approach.
{"title":"Sensitivity analysis of S-parameters Including port variations using the Transfinite Element Method","authors":"L. Vardapetyan, J. Manges, Z. Cendes","doi":"10.1109/MWSYM.2008.4633219","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4633219","url":null,"abstract":"Sensitivity analysis of microwave devices with respect to design parameters is presented. Ports are included in the computational domain via the Transfinite Element Method. The derivative of the system matrix is computed analytically. In particular, derivatives of the system matrix entries that depend on ports are obtained by analytical differentiation of the port eigenvalue problem. Numerical examples confirm the effectiveness of the proposed approach.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133064081","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 : 2008-06-15DOI: 10.1109/MWSYM.2008.4633236
J. Corral, R. Sambaraju, M. Piqueras, V. Polo
A novel photonic vector modulator architecture for generating pure quadrature amplitude modulation (QAM) signals is presented. No electrical devices apart from the local oscillator are needed in the generation process. Both binary and multilevel digital signals can be used to generate quadrature phase shift keying (QPSK) or multilevel QAM (M-QAM) digital modulations at any carrier frequency. A pure 2.5Gb/s 16-QAM signal has been experimentally generated at a 42 GHz carrier frequency.
{"title":"Pure 2.5 Gb/s 16-QAM signal generation with photonic vector modulator","authors":"J. Corral, R. Sambaraju, M. Piqueras, V. Polo","doi":"10.1109/MWSYM.2008.4633236","DOIUrl":"https://doi.org/10.1109/MWSYM.2008.4633236","url":null,"abstract":"A novel photonic vector modulator architecture for generating pure quadrature amplitude modulation (QAM) signals is presented. No electrical devices apart from the local oscillator are needed in the generation process. Both binary and multilevel digital signals can be used to generate quadrature phase shift keying (QPSK) or multilevel QAM (M-QAM) digital modulations at any carrier frequency. A pure 2.5Gb/s 16-QAM signal has been experimentally generated at a 42 GHz carrier frequency.","PeriodicalId":273767,"journal":{"name":"2008 IEEE MTT-S International Microwave Symposium Digest","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2008-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133345797","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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