Pub Date : 2017-06-01DOI: 10.1109/MWSYM.2017.8058910
J. Rautio
Port tuning is a form of space mapping that allows rapid optimization of filters and other microwave circuits. An initial electromagnetic (EM) analysis of the filter with tuning ports inserted in all resonators is performed. Then small circuit theory components (e.g., inductors, transmission lines) are connected to the tuning ports and filter optimization takes place at circuit theory speed with nearly full EM accuracy. Once a port tuning model is in place, design time can be reduced to almost zero. This paper discusses the effect of internal port calibration and illustrates the additional port tuning techniques allowed when good port calibration is available. While the technique can work in some cases without port calibration, the range, accuracy, and efficiency is vastly improved with good port calibration.
{"title":"Tuning ports in the middle of resonators","authors":"J. Rautio","doi":"10.1109/MWSYM.2017.8058910","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058910","url":null,"abstract":"Port tuning is a form of space mapping that allows rapid optimization of filters and other microwave circuits. An initial electromagnetic (EM) analysis of the filter with tuning ports inserted in all resonators is performed. Then small circuit theory components (e.g., inductors, transmission lines) are connected to the tuning ports and filter optimization takes place at circuit theory speed with nearly full EM accuracy. Once a port tuning model is in place, design time can be reduced to almost zero. This paper discusses the effect of internal port calibration and illustrates the additional port tuning techniques allowed when good port calibration is available. While the technique can work in some cases without port calibration, the range, accuracy, and efficiency is vastly improved with good port calibration.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73301621","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8059091
Haifeng Wu, Xuejie Liao, Cetian Wang, Yijun Chen, Yunan Hua, Liu-lin Hu, Jiping Lv, W. Tong
A 4–10 GHz fully-integrated power amplifier (PA) is demonstrated using a 0.15-μm GaAs pHEMT process. This PA employs a compact structure with 4-parallel 3-stacked-FET cells to obtain a broadband power performance within a very small chip size. The measurement results of this PA in the frequency range of 4–10 GHz show a gain flatness of 13.5±1.5 dB, a maximum input return loss (S11) of −9 dB, a maximum output return loss (S22) of −7 dB, and a 35–37 dBm output power with the corresponding power added efficiency (PAE) of 25–32%. To the author's knowledge, this is the first GaAs PA ever reported which covers the frequency range of 4–10 GHz and achieves the combination of output power and instantaneous broadband performance within a chip size of 1.6×1.6 mm2.
{"title":"A 4–10 GHz fully-integrated stacked GaAs pHEMT power amplifier","authors":"Haifeng Wu, Xuejie Liao, Cetian Wang, Yijun Chen, Yunan Hua, Liu-lin Hu, Jiping Lv, W. Tong","doi":"10.1109/MWSYM.2017.8059091","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8059091","url":null,"abstract":"A 4–10 GHz fully-integrated power amplifier (PA) is demonstrated using a 0.15-μm GaAs pHEMT process. This PA employs a compact structure with 4-parallel 3-stacked-FET cells to obtain a broadband power performance within a very small chip size. The measurement results of this PA in the frequency range of 4–10 GHz show a gain flatness of 13.5±1.5 dB, a maximum input return loss (S11) of −9 dB, a maximum output return loss (S22) of −7 dB, and a 35–37 dBm output power with the corresponding power added efficiency (PAE) of 25–32%. To the author's knowledge, this is the first GaAs PA ever reported which covers the frequency range of 4–10 GHz and achieves the combination of output power and instantaneous broadband performance within a chip size of 1.6×1.6 mm2.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73365007","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8058807
D. Prather, J. Murakowski, G. Schneider, S. Shi, C. Schuetz, Dylan D. Ross
A technique for the spatial-spectral analysis of the cellular environment by performing a near real-time imaging of k-space is presented. The system uses a random spatial-spectral dispersion map from an optically-upconverted RF phased array receiver and tomographic reconstruction techniques to recover the cellular source scene. While spatial dispersion is inherent to phased array antennas, temporal dispersion is introduced by randomizing the fiber length for each up-converted antenna element, which contains the received RF signal as a sideband on an optical carrier. Each fiber is routed into a common fiber bundle where the filtered RF-sidebands are launched into free space, expand and overlap. The resulting complex superposition produces an interference pattern unique to a given RF source location and frequency, which is used to recover the spatial direction and frequency of each source in the cellular environment. We present the theory of operation and experimental results of this approach.
{"title":"k-Space tomography for spatial-spectral monitoring in cellular networks","authors":"D. Prather, J. Murakowski, G. Schneider, S. Shi, C. Schuetz, Dylan D. Ross","doi":"10.1109/MWSYM.2017.8058807","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058807","url":null,"abstract":"A technique for the spatial-spectral analysis of the cellular environment by performing a near real-time imaging of k-space is presented. The system uses a random spatial-spectral dispersion map from an optically-upconverted RF phased array receiver and tomographic reconstruction techniques to recover the cellular source scene. While spatial dispersion is inherent to phased array antennas, temporal dispersion is introduced by randomizing the fiber length for each up-converted antenna element, which contains the received RF signal as a sideband on an optical carrier. Each fiber is routed into a common fiber bundle where the filtered RF-sidebands are launched into free space, expand and overlap. The resulting complex superposition produces an interference pattern unique to a given RF source location and frequency, which is used to recover the spatial direction and frequency of each source in the cellular environment. We present the theory of operation and experimental results of this approach.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79928646","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8058932
S. A. Nauroze, L. Novelino, M. Tentzeris, G. Paulino
A state-of-the-art fully Inkjet-printed tunable frequency selective surface on cellulose paper is presented, which uses a Miura origami structure for an on-demand linear variation in inter-element distance and the effective length of the resonant dipole elements, resulting in an observable shift in the operational frequency of the structure. The dipole elements are placed on the foldlines along with special “bridge-like” structures to realize first-of-its-kind truly flexible conductive traces over sharp bends. Simulation and measurement results show that the Miura-FSS can be tuned to a wide range of frequencies and features a large angle of incidence rejection.
{"title":"Inkjet-printed “4D” tunable spatial filters using on-demand foldable surfaces","authors":"S. A. Nauroze, L. Novelino, M. Tentzeris, G. Paulino","doi":"10.1109/MWSYM.2017.8058932","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058932","url":null,"abstract":"A state-of-the-art fully Inkjet-printed tunable frequency selective surface on cellulose paper is presented, which uses a Miura origami structure for an on-demand linear variation in inter-element distance and the effective length of the resonant dipole elements, resulting in an observable shift in the operational frequency of the structure. The dipole elements are placed on the foldlines along with special “bridge-like” structures to realize first-of-its-kind truly flexible conductive traces over sharp bends. Simulation and measurement results show that the Miura-FSS can be tuned to a wide range of frequencies and features a large angle of incidence rejection.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77172874","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8058732
Junwen Jiang, Ka Wai Wong, R. Mansour
This paper presents a millimeter-wave variable attenuator using vanadium dioxide (VO2)-based variable resistors. The thin-films VO2 are integrated monolithically with a 0-dB coupler to realize the variable attenuator. A 30 GHz variable attenuator is designed, fabricated, and tested to verify the concept. It exhibits a continuous attenuation tuning range of 13 dB, and a return loss of 15 dB over a bandwidth of 5 GHz. The proposed VO2 based variable attenuators have a great potential to be used in a wide range of millimeter-wave applications.
{"title":"A VO2-based 30 GHz variable attenuator","authors":"Junwen Jiang, Ka Wai Wong, R. Mansour","doi":"10.1109/MWSYM.2017.8058732","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058732","url":null,"abstract":"This paper presents a millimeter-wave variable attenuator using vanadium dioxide (VO2)-based variable resistors. The thin-films VO2 are integrated monolithically with a 0-dB coupler to realize the variable attenuator. A 30 GHz variable attenuator is designed, fabricated, and tested to verify the concept. It exhibits a continuous attenuation tuning range of 13 dB, and a return loss of 15 dB over a bandwidth of 5 GHz. The proposed VO2 based variable attenuators have a great potential to be used in a wide range of millimeter-wave applications.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77185302","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8058767
Tong-Hong Lin, J. Bito, J. Hester, J. Kimionis, R. Bahr, M. Tentzeris
A novel wearable and flexible energy harvesting circuit from a hand-held two-way radio for an energy autonomous on-body sensing network is proposed. The proposed circuit is more efficient than conventional ambient RF energy harvesting architectures because both the dc and the harmonics generated by the rectifier is simultaneously utilized to serve two different functions. The dc power is used to drive dc loads and the harmonic is used to build a carrier emitter for backscatter RFID tags for on-body sensing. The 3D printed substrate is used to alleviate the limitations imposed by the substrate. Both the energy harvester and the custom backscatter RFID tags are fabricated and characterized. The measured dc and the second harmonic, 928 MHz, output power from the proposed rectifier are 17.5 dBm and 1.43 dBm while a two-way talk radio is 9 cm away. The reading range of the custom tag is extended to 17 m with the help of the proposed energy harvester.
{"title":"Ambient energy harvesting from two-way talk radio for on-body autonomous wireless sensing network using inkjet and 3D printing","authors":"Tong-Hong Lin, J. Bito, J. Hester, J. Kimionis, R. Bahr, M. Tentzeris","doi":"10.1109/MWSYM.2017.8058767","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058767","url":null,"abstract":"A novel wearable and flexible energy harvesting circuit from a hand-held two-way radio for an energy autonomous on-body sensing network is proposed. The proposed circuit is more efficient than conventional ambient RF energy harvesting architectures because both the dc and the harmonics generated by the rectifier is simultaneously utilized to serve two different functions. The dc power is used to drive dc loads and the harmonic is used to build a carrier emitter for backscatter RFID tags for on-body sensing. The 3D printed substrate is used to alleviate the limitations imposed by the substrate. Both the energy harvester and the custom backscatter RFID tags are fabricated and characterized. The measured dc and the second harmonic, 928 MHz, output power from the proposed rectifier are 17.5 dBm and 1.43 dBm while a two-way talk radio is 9 cm away. The reading range of the custom tag is extended to 17 m with the help of the proposed energy harvester.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82289444","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8058657
S. Caizzone, W. Elmarissi, M. A. M. Marinho, F. Antreich
The quest for compact antenna arrays able to perform robust beamforming and high resolution direction of arrival (DOA) estimation is pushing the antenna array dimensions to progressively shrink, with effects in terms of reduced performance not only for the antenna but also for beamforming and DOA estimation algorithms, for which their assumptions about the antenna properties do not hold anymore. This work shows the design and development of an antenna array with adjustable mutual distance between the single elements: such setup will allow to scientifically analyse the effects that progressive miniaturization, i.e. progressively smaller mutual distances between the antennas, have on the DOA estimation algorithms, as well as show the improvements obtained by using array interpolation methods, i.e. techniques able to create a virtual array response out of the actual array one, such as to comply with the algorithms' requirements on the antenna response.
{"title":"Direction of arrival estimation performance for compact antenna arrays with adjustable size","authors":"S. Caizzone, W. Elmarissi, M. A. M. Marinho, F. Antreich","doi":"10.1109/MWSYM.2017.8058657","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058657","url":null,"abstract":"The quest for compact antenna arrays able to perform robust beamforming and high resolution direction of arrival (DOA) estimation is pushing the antenna array dimensions to progressively shrink, with effects in terms of reduced performance not only for the antenna but also for beamforming and DOA estimation algorithms, for which their assumptions about the antenna properties do not hold anymore. This work shows the design and development of an antenna array with adjustable mutual distance between the single elements: such setup will allow to scientifically analyse the effects that progressive miniaturization, i.e. progressively smaller mutual distances between the antennas, have on the DOA estimation algorithms, as well as show the improvements obtained by using array interpolation methods, i.e. techniques able to create a virtual array response out of the actual array one, such as to comply with the algorithms' requirements on the antenna response.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82493758","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8058656
Reece T. Iwami, Tyler F. Chun, Wade Tonaki, W. Shiroma
A power-detecting, null-scanning, retrodirective antenna array for CubeSat platforms is presented. The system utilizes several hardware and software enhancements over previous retrodirective array architectures to address the size, weight, and power limitations of the CubeSat structure. Full-duplex retro-directivity is reported at 9.59 and 9.67 GHz for transmit and receive, respectively.
{"title":"A power-detecting, null-scanning, retrodirective array for a CubeSat platform","authors":"Reece T. Iwami, Tyler F. Chun, Wade Tonaki, W. Shiroma","doi":"10.1109/MWSYM.2017.8058656","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058656","url":null,"abstract":"A power-detecting, null-scanning, retrodirective antenna array for CubeSat platforms is presented. The system utilizes several hardware and software enhancements over previous retrodirective array architectures to address the size, weight, and power limitations of the CubeSat structure. Full-duplex retro-directivity is reported at 9.59 and 9.67 GHz for transmit and receive, respectively.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78682876","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8058669
W. Scheiblhofer, R. Feger, A. Haderer, S. Scheiblhofer, A. Stelzer
In this paper, the integration of a communication link for a modulated-reflector radar is presented. This kind of radar system is intended to determine the position of multiple semi-passive backscatter reflector nodes, designed to be mounted on different objects of interest. A method to transport information from these objects back to the radar-basestation is sketched, using the available hardware-resources of the nodes. In addition a technique minimizing the influence of this communication link on the localization capability of the system is presented and validated by measurements.
{"title":"Simultaneous localization and data-interrogation using a 24-GHz modulated-reflector FMCW radar system","authors":"W. Scheiblhofer, R. Feger, A. Haderer, S. Scheiblhofer, A. Stelzer","doi":"10.1109/MWSYM.2017.8058669","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058669","url":null,"abstract":"In this paper, the integration of a communication link for a modulated-reflector radar is presented. This kind of radar system is intended to determine the position of multiple semi-passive backscatter reflector nodes, designed to be mounted on different objects of interest. A method to transport information from these objects back to the radar-basestation is sketched, using the available hardware-resources of the nodes. In addition a technique minimizing the influence of this communication link on the localization capability of the system is presented and validated by measurements.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76177349","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 : 2017-06-01DOI: 10.1109/MWSYM.2017.8058869
Yu-An Lin, Ya-Che Yeh, Hong-Yeh Chang
A broadband high-speed high-linearity track-and-hold amplifier (THA) is presented in this paper using 0.18 μm SiGe process. A switched emitter follower track-and-hold (T/H) stage with cascode stage is adopted to achieve high resolution for analog-to-digital conversion. A modified Darlington amplifier with peaking technique is used to enhance the input bandwidth. With a dc power consumption of 94.3 mW, the proposed THA demonstrates a 3-dB input bandwidth from DC to 27 GHz, a maximum spurious-free dynamic range of 45 dB, and a minimum total harmonic distortion of −40 dB. The proposed circuit has potential for high-speed high-dynamic-range applications due to its superior performance.
{"title":"A 27-GHz 45-dB SFDR track-and-hold amplifier using modified darlington amplifier and cascoded SEF in 0.18-μm SiGe process","authors":"Yu-An Lin, Ya-Che Yeh, Hong-Yeh Chang","doi":"10.1109/MWSYM.2017.8058869","DOIUrl":"https://doi.org/10.1109/MWSYM.2017.8058869","url":null,"abstract":"A broadband high-speed high-linearity track-and-hold amplifier (THA) is presented in this paper using 0.18 μm SiGe process. A switched emitter follower track-and-hold (T/H) stage with cascode stage is adopted to achieve high resolution for analog-to-digital conversion. A modified Darlington amplifier with peaking technique is used to enhance the input bandwidth. With a dc power consumption of 94.3 mW, the proposed THA demonstrates a 3-dB input bandwidth from DC to 27 GHz, a maximum spurious-free dynamic range of 45 dB, and a minimum total harmonic distortion of −40 dB. The proposed circuit has potential for high-speed high-dynamic-range applications due to its superior performance.","PeriodicalId":6481,"journal":{"name":"2017 IEEE MTT-S International Microwave Symposium (IMS)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87607209","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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