Pub Date : 2018-06-01DOI: 10.1109/MWSYM.2018.8439832
H. Chu, Ting Heish, T. Ma
This paper presents an electronically reconfigurable dual-mode integrated beam-steering array. The core building block to fulfill the design is the reconfigurable synthesized transmission line (RSTL), whose transmission characteristic is controlled by a varactor diode as an on/off RF switch. By integrating the RSTLs to the array feed network, the proposed array is capable of, at a given frequency, switching its functionality as a beam-switching Butler matrix or a retro-directive array combined with data modulation. The switching is only dependent on the bias voltage of the varactor diodes, and the dc power consumption is very low $(mu mathrm{W})$. The circuit response of the feed network and the radiation characteristics of the phased array are verified experimentally.
{"title":"Reconfigurable Dual-mode Integrated Beam-steering Array","authors":"H. Chu, Ting Heish, T. Ma","doi":"10.1109/MWSYM.2018.8439832","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439832","url":null,"abstract":"This paper presents an electronically reconfigurable dual-mode integrated beam-steering array. The core building block to fulfill the design is the reconfigurable synthesized transmission line (RSTL), whose transmission characteristic is controlled by a varactor diode as an on/off RF switch. By integrating the RSTLs to the array feed network, the proposed array is capable of, at a given frequency, switching its functionality as a beam-switching Butler matrix or a retro-directive array combined with data modulation. The switching is only dependent on the bias voltage of the varactor diodes, and the dc power consumption is very low $(mu mathrm{W})$. The circuit response of the feed network and the radiation characteristics of the phased array are verified experimentally.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"59 1","pages":"628-631"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91231428","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439568
Tzu-Chun Tai, Hung-Wei Wu, Yu-Ming Lin, Sin-Pei Wang, Yeong-Her Wang, S. Chang
In this paper, we presented a method to investigate the effects of average power-handling capability (APHC) on dc reactive magnetron sputtering aluminum nitride (AlN) thin film coplanar waveguide (CPW) line fabricated on the ceramic substrate. We discussed the effects of material properties, microwave characteristics, and APHC on the thin-film CPW line. Using the AlN thin-film passivation on the ceramic substrate can effectively improve the thermal conductivity and enhance the APHC of a thin-film CPW line. Measured microwave losses (total of conductor loss $pmb{alpha}_{mathbf{c}}(pmb{f})$ and dielectric loss $pmb{alpha}_{mathbf{d}}(pmb{f})$, dielectric constant, and APHC were extracted from S-parameters that were measured up to 10 GHz. This method can be applied in low-temperature cofired ceramic techniques (LTCC).
{"title":"Effects of Average Power-Handling Capability on DC-Sputtering Aluminum Nitride Thin Film on Ceramic Substrate","authors":"Tzu-Chun Tai, Hung-Wei Wu, Yu-Ming Lin, Sin-Pei Wang, Yeong-Her Wang, S. Chang","doi":"10.1109/MWSYM.2018.8439568","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439568","url":null,"abstract":"In this paper, we presented a method to investigate the effects of average power-handling capability (APHC) on dc reactive magnetron sputtering aluminum nitride (AlN) thin film coplanar waveguide (CPW) line fabricated on the ceramic substrate. We discussed the effects of material properties, microwave characteristics, and APHC on the thin-film CPW line. Using the AlN thin-film passivation on the ceramic substrate can effectively improve the thermal conductivity and enhance the APHC of a thin-film CPW line. Measured microwave losses (total of conductor loss $pmb{alpha}_{mathbf{c}}(pmb{f})$ and dielectric loss $pmb{alpha}_{mathbf{d}}(pmb{f})$, dielectric constant, and APHC were extracted from S-parameters that were measured up to 10 GHz. This method can be applied in low-temperature cofired ceramic techniques (LTCC).","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"1 1","pages":"1385-1388"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88559087","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439540
Z. Yao, H. Cui, T. Itoh, Y. Wang
A fast-converging one-dimensional (1-D) finite-difference time-domain (FDTD) algorithm has been proposed based on reduction strategy of unknowns in electromagnetic (EM) fields. The proposed algorithm solves simultaneously Max-well's equations and Landau-Lifshitz-Gilbert (LLG) equation with nonlinear effects. Therefore, the proposed algorithm can predict the dynamic interaction between magnetic spins and EM fields. The accuracy of the modeling has been validated by 1. a standard magnetic switching process under static magnetic fields, and 2. the dispersive permeability of a PEe-backed continuous ferrite film with a 3 $pmb{mu} mathbf{m}$ -thickness, under dynamic electric excitation. The simulated permeability agrees with the theoretical prediction, under both linear and nonlinear circumstances. Specifically, the algorithm has fully revealed numerically that sufficiently large RF power can decrease the ferromagnetic resonance (FMR) frequency and suppress the permeability.
{"title":"Multiphysics Time-Domain Modeling of Nonlinear Permeability in Thin-film Magnetic Material","authors":"Z. Yao, H. Cui, T. Itoh, Y. Wang","doi":"10.1109/MWSYM.2018.8439540","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439540","url":null,"abstract":"A fast-converging one-dimensional (1-D) finite-difference time-domain (FDTD) algorithm has been proposed based on reduction strategy of unknowns in electromagnetic (EM) fields. The proposed algorithm solves simultaneously Max-well's equations and Landau-Lifshitz-Gilbert (LLG) equation with nonlinear effects. Therefore, the proposed algorithm can predict the dynamic interaction between magnetic spins and EM fields. The accuracy of the modeling has been validated by 1. a standard magnetic switching process under static magnetic fields, and 2. the dispersive permeability of a PEe-backed continuous ferrite film with a 3 $pmb{mu} mathbf{m}$ -thickness, under dynamic electric excitation. The simulated permeability agrees with the theoretical prediction, under both linear and nonlinear circumstances. Specifically, the algorithm has fully revealed numerically that sufficiently large RF power can decrease the ferromagnetic resonance (FMR) frequency and suppress the permeability.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"38 1","pages":"208-211"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85995345","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439428
R. Correia, N. Carvalho
Wireless sensor nodes growth is limited by high cost and energy consumption. Backscatter communication over ambient sources has the potential to overcome these limitations since eliminate the need of an active RF transmitter. In this work, we propose a dual-band 4-QAM ambient backscatter circuit, which employs a dual-band Wilkinson power divider combined with a modulator composed of two transistors responsible for generating the modulation. The design strategy for dual-band high level order backscatter modulations will be explained and a design approach will be presented in this manuscript. The modulator presents a power consumption of 27 nW for 500 kbps of data rate.
{"title":"Dual-Band High Order Modulation Ambient Backscatter","authors":"R. Correia, N. Carvalho","doi":"10.1109/MWSYM.2018.8439428","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439428","url":null,"abstract":"Wireless sensor nodes growth is limited by high cost and energy consumption. Backscatter communication over ambient sources has the potential to overcome these limitations since eliminate the need of an active RF transmitter. In this work, we propose a dual-band 4-QAM ambient backscatter circuit, which employs a dual-band Wilkinson power divider combined with a modulator composed of two transistors responsible for generating the modulation. The design strategy for dual-band high level order backscatter modulations will be explained and a design approach will be presented in this manuscript. The modulator presents a power consumption of 27 nW for 500 kbps of data rate.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"1 1","pages":"270-273"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86416981","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439603
Harikesh, A. Basu, M. Abegaonkar, S. Koul
In this paper, a simple direct demodulation Doppler radar is proposed to detect the respiration rate through the wall using Hilbert vibration decomposition (HVD) at 2.4 GHz. For through the wall detection of the human subject, the measurements are taken by varying the respiration rate, with different positions of human subject with respect to the radar and different background behind the human subject. This method is suitable for the detection of human subject in natural calamities or disasters. Using this method, through the wall respiration rate of human subject can be detected up to 2–3 meter.
{"title":"Through The Wall Respiration Rate Detection Using Hilbert Vibrational Decomposition","authors":"Harikesh, A. Basu, M. Abegaonkar, S. Koul","doi":"10.1109/MWSYM.2018.8439603","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439603","url":null,"abstract":"In this paper, a simple direct demodulation Doppler radar is proposed to detect the respiration rate through the wall using Hilbert vibration decomposition (HVD) at 2.4 GHz. For through the wall detection of the human subject, the measurements are taken by varying the respiration rate, with different positions of human subject with respect to the radar and different background behind the human subject. This method is suitable for the detection of human subject in natural calamities or disasters. Using this method, through the wall respiration rate of human subject can be detected up to 2–3 meter.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"17 1","pages":"961-963"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81651407","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439226
T. Nagatsuma, T. Kurokawa, M. Sonoda, T. Ishibashi, M. Shimizu, K. Kato
Uni-traveling-carrier photodiodes (UTC-PDs) are packaged with WR-1.5 rectangular metallic waveguides to ensure 600-GHz band operation. A broadband coupler circuit between the UTC-PD and the hollow waveguide is monolithically integrated with the UTC-PD chip. The fabricated module exhibits the 3-dB bandwidth of 340 GHz, which is the widest among ever-reported photodiode modules. This module is successfully applied to 600-GHz band wireless communications with a data rate of over 10 Gbit/s.
{"title":"600-GHz-band Waveguide-output Uni-traveling-carrier Photodiodes and Their Applications to Wireless Communication","authors":"T. Nagatsuma, T. Kurokawa, M. Sonoda, T. Ishibashi, M. Shimizu, K. Kato","doi":"10.1109/MWSYM.2018.8439226","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439226","url":null,"abstract":"Uni-traveling-carrier photodiodes (UTC-PDs) are packaged with WR-1.5 rectangular metallic waveguides to ensure 600-GHz band operation. A broadband coupler circuit between the UTC-PD and the hollow waveguide is monolithically integrated with the UTC-PD chip. The fabricated module exhibits the 3-dB bandwidth of 340 GHz, which is the widest among ever-reported photodiode modules. This module is successfully applied to 600-GHz band wireless communications with a data rate of over 10 Gbit/s.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"22 1","pages":"1180-1183"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81840573","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439137
S. Sirci, M. Sánchez-Soriano, J. D. Martínez, V. Boria
The implementation of singlets and doublets in coaxial SIW technology is presented in this paper. The proposed structures are based on the introduction of a direct source/load bypass coupling using end-coupled embedded coplanar lines. The modelling and design of these structures are discussed, and then two prototypes are designed, manufactured and measured, thus showing the validity of the proposed approach and its potential application for implementing highly selective responses in a very compact footprint.
{"title":"High Selectivity Filters in Coaxial SIW Based on Singlets and Doublets","authors":"S. Sirci, M. Sánchez-Soriano, J. D. Martínez, V. Boria","doi":"10.1109/MWSYM.2018.8439137","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439137","url":null,"abstract":"The implementation of singlets and doublets in coaxial SIW technology is presented in this paper. The proposed structures are based on the introduction of a direct source/load bypass coupling using end-coupled embedded coplanar lines. The modelling and design of these structures are discussed, and then two prototypes are designed, manufactured and measured, thus showing the validity of the proposed approach and its potential application for implementing highly selective responses in a very compact footprint.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"64 1","pages":"704-707"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84834835","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439512
S. Afshar, E. Salimi, M. Butler, D. Thomson, G. Bridges
We employed dielectrophoresis (DEP) to investigate changes in the membrane capacitance and cytoplasm conductivity of single Chinese hamster ovary (CHO) cells induced by thermal stress. CHO cells were exposed to temperatures ranging from 42 °C to 50°C for 15 minutes. The DEP response of heat-treated cells were measured at frequencies over the $beta$ -dispersion region using a microwave DEP cytometer. The results reveal that temperature induced stress is accompanied by decrease in the cell membrane capacitance, and decline in the ionic content of cytoplasm.
{"title":"DEP Measurement of the Dielectric Properties of Single CHO Cells Under Thermal Stress","authors":"S. Afshar, E. Salimi, M. Butler, D. Thomson, G. Bridges","doi":"10.1109/MWSYM.2018.8439512","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439512","url":null,"abstract":"We employed dielectrophoresis (DEP) to investigate changes in the membrane capacitance and cytoplasm conductivity of single Chinese hamster ovary (CHO) cells induced by thermal stress. CHO cells were exposed to temperatures ranging from 42 °C to 50°C for 15 minutes. The DEP response of heat-treated cells were measured at frequencies over the $beta$ -dispersion region using a microwave DEP cytometer. The results reveal that temperature induced stress is accompanied by decrease in the cell membrane capacitance, and decline in the ionic content of cytoplasm.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"57 1","pages":"1152-1155"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84843325","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439465
R. Das, Qingfeng Zhang, A. Kandwal, Haiwen Liu
This paper proposes a novel coupling matrix extraction technique for both highly lossy and lossless filters for the first time. Pole zero optimization is used to approximate characteristic polynomials (CP) from measured results. Coupling matrix (CM) can be derived from CP which is further used for filter auto tuning. Three different filter configurations are considered for validation of proposed CM extraction method. Finally, a lossy filter with unequal $Q_{u}$ tuning case is examined to demonstrate the robustness of the proposed extraction technique.
{"title":"Coupling Matrix Extraction Technique for Auto Tuning of Highly Lossy Filters","authors":"R. Das, Qingfeng Zhang, A. Kandwal, Haiwen Liu","doi":"10.1109/MWSYM.2018.8439465","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439465","url":null,"abstract":"This paper proposes a novel coupling matrix extraction technique for both highly lossy and lossless filters for the first time. Pole zero optimization is used to approximate characteristic polynomials (CP) from measured results. Coupling matrix (CM) can be derived from CP which is further used for filter auto tuning. Three different filter configurations are considered for validation of proposed CM extraction method. Finally, a lossy filter with unequal $Q_{u}$ tuning case is examined to demonstrate the robustness of the proposed extraction technique.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"45 4 1","pages":"697-700"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89178068","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 : 2018-06-01DOI: 10.1109/MWSYM.2018.8439567
S. Sattler, F. Gentili, R. Teschl, W. Bösch
In recent years, additive manufacturing (AM) techniques were increasingly applied to develop RF and microwave components. The main advantage of AM is a reduction in both mass and production time. The AM technique investigated in this paper is direct metal printing (DMP). As a consequence, challenging geometries can be implemented. Here we present a 4th order cavity filter, realized by cascading four lollypop-shaped resonators. The filter was designed to be manufactured in one block using stainless steel as a base material, however, for reasons of workpiece accessibility the two halves and the closing plates of the first prototype were produced separately and subsequently fixed together. Tuning screws were used to adjust the performance. The prototype filter exhibits a measured insertion loss of 1.14 dB with the matching being better than −12.77 dB, a fractional bandwidth of about 3.6 % at 7.926 GHz, and a Q-factor of 1600.
{"title":"Direct Metal Printed 4th order Stepped Impedance Filter in the C/X Band","authors":"S. Sattler, F. Gentili, R. Teschl, W. Bösch","doi":"10.1109/MWSYM.2018.8439567","DOIUrl":"https://doi.org/10.1109/MWSYM.2018.8439567","url":null,"abstract":"In recent years, additive manufacturing (AM) techniques were increasingly applied to develop RF and microwave components. The main advantage of AM is a reduction in both mass and production time. The AM technique investigated in this paper is direct metal printing (DMP). As a consequence, challenging geometries can be implemented. Here we present a 4th order cavity filter, realized by cascading four lollypop-shaped resonators. The filter was designed to be manufactured in one block using stainless steel as a base material, however, for reasons of workpiece accessibility the two halves and the closing plates of the first prototype were produced separately and subsequently fixed together. Tuning screws were used to adjust the performance. The prototype filter exhibits a measured insertion loss of 1.14 dB with the matching being better than −12.77 dB, a fractional bandwidth of about 3.6 % at 7.926 GHz, and a Q-factor of 1600.","PeriodicalId":6675,"journal":{"name":"2018 IEEE/MTT-S International Microwave Symposium - IMS","volume":"3 1","pages":"145-148"},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84297643","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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