Pub Date : 2020-08-01DOI: 10.1109/IMS30576.2020.9223804
Na Zhu, Andrew Franson, S. Kurfman, M. Chilcote, D. Candido, Katherine E. Nygren, M. Flatté, K. Buchanan, E. Johnston-Halperin, H. Tang
Vanadium tetracyanoethylene ($V$(TCNE)2) is a new organic ferrimagnetic material known for its ultra low Gilbert damping. Magnetic resonators based on this material demonstrate high quality factors exceeding 7,000 at ambient conditions, rivaling those of inorganic magnetic materials such as Yttrium Iron Garnet (YIG). $V$(TCNE)2 is of particular interest for non-reciprocal device applications thanks to its micro-patterning capabilities. Here we provide a review of the magnetic and microwave properties of $V$(TCNE)2 and discuss its potential applications in microwave circulators. Using a generic multimode coupling model, we describe $V$(TCNE)2-based superconducting circulator and assess its optimal performance in terms of isolation, insertion loss and circulation bandwidth. High isolation (> 59 dB), extremely low insertion loss (< 0.03 dB), and flexible bandwidth control can be potentially realized. By engineering the V(TCNE)2 structures, the devices can operate in both weak and strong coupling regimes, realizing various circulation bandwidths from sub-megahertz to hundreds of megahertz. Especially, the narrow-band circulation could serve as a filter function and benefit noise-sensitive quantum microwave measurements.
{"title":"Organic Ferrimagnetic Material Vanadium Tetracyanoethylene for Non-reciprocal Microwave Applications","authors":"Na Zhu, Andrew Franson, S. Kurfman, M. Chilcote, D. Candido, Katherine E. Nygren, M. Flatté, K. Buchanan, E. Johnston-Halperin, H. Tang","doi":"10.1109/IMS30576.2020.9223804","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9223804","url":null,"abstract":"Vanadium tetracyanoethylene ($V$(TCNE)2) is a new organic ferrimagnetic material known for its ultra low Gilbert damping. Magnetic resonators based on this material demonstrate high quality factors exceeding 7,000 at ambient conditions, rivaling those of inorganic magnetic materials such as Yttrium Iron Garnet (YIG). $V$(TCNE)2 is of particular interest for non-reciprocal device applications thanks to its micro-patterning capabilities. Here we provide a review of the magnetic and microwave properties of $V$(TCNE)2 and discuss its potential applications in microwave circulators. Using a generic multimode coupling model, we describe $V$(TCNE)2-based superconducting circulator and assess its optimal performance in terms of isolation, insertion loss and circulation bandwidth. High isolation (> 59 dB), extremely low insertion loss (< 0.03 dB), and flexible bandwidth control can be potentially realized. By engineering the V(TCNE)2 structures, the devices can operate in both weak and strong coupling regimes, realizing various circulation bandwidths from sub-megahertz to hundreds of megahertz. Especially, the narrow-band circulation could serve as a filter function and benefit noise-sensitive quantum microwave measurements.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"24 1","pages":"528-531"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86145588","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9224014
Meng-Hsuan Lin, Chia-Chan Chang, Sheng-Fuh Chang
A 915-MHz transmitting tag designed for nasogastric tube (NGT) positioning is proposed and implemented in this work. Associated with the guidewire, only the tag antenna is attached at the wire tip and will be inserted into the human body along with the tube, while the other transmitting circuitry and the battery will stay outside the body. Due to the size restriction of NGT, the designed helical dipole antenna is 106 mm in length and only 4 mm in diameter, and has a measured gain of 1.92 dBi. Verification tests were performed on different pork tissues as well as the intubation training phantom. It is expected that this sensing technique could provide a low cost solution to help to prevent the tube misplacement during intubation.
{"title":"The Design of Transmitting Tag for Nasogastric Intubation Sensing","authors":"Meng-Hsuan Lin, Chia-Chan Chang, Sheng-Fuh Chang","doi":"10.1109/IMS30576.2020.9224014","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9224014","url":null,"abstract":"A 915-MHz transmitting tag designed for nasogastric tube (NGT) positioning is proposed and implemented in this work. Associated with the guidewire, only the tag antenna is attached at the wire tip and will be inserted into the human body along with the tube, while the other transmitting circuitry and the battery will stay outside the body. Due to the size restriction of NGT, the designed helical dipole antenna is 106 mm in length and only 4 mm in diameter, and has a measured gain of 1.92 dBi. Verification tests were performed on different pork tissues as well as the intubation training phantom. It is expected that this sensing technique could provide a low cost solution to help to prevent the tube misplacement during intubation.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"90 1","pages":"500-503"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86178045","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9223862
André Dürr, D. Schwarz, C. Waldschmidt
In this paper a thorough system analysis to evaluate the overall imaging performance of millimeter wave radar systems is presented. All relevant noise influences and their influence on the system performance are considered. A comparison of two imaging radar systems at 160 GHz with different hardware architectures is discussed, one of which is based on monolithic microwave integrated circuits (MMICs) optimized for low phase noise. Radar measurements are performed to evaluate the achievable imaging performance with both realized radar demonstrators. It is shown that the optimization of the phase noise of a single MMIC is not necessarily advantageous when used for multi-channel radar systems.
{"title":"A System Analysis of Noise Influences on the Imaging Performance of Millimeter Wave MIMO Radars","authors":"André Dürr, D. Schwarz, C. Waldschmidt","doi":"10.1109/IMS30576.2020.9223862","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9223862","url":null,"abstract":"In this paper a thorough system analysis to evaluate the overall imaging performance of millimeter wave radar systems is presented. All relevant noise influences and their influence on the system performance are considered. A comparison of two imaging radar systems at 160 GHz with different hardware architectures is discussed, one of which is based on monolithic microwave integrated circuits (MMICs) optimized for low phase noise. Radar measurements are performed to evaluate the achievable imaging performance with both realized radar demonstrators. It is shown that the optimization of the phase noise of a single MMIC is not necessarily advantageous when used for multi-channel radar systems.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"1 1","pages":"1019-1022"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86532897","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9223856
F. Thome, E. Ture, A. Leuther, F. Schäfer, A. Navarrini, P. Serres, O. Ambacher
In this paper, a W-band I/Q-down-conversion monolithic microwave integrated circuit (MMIC) is presented. The MMIC is based on the Fraunhofer IAF 50-nm gate-length metamorphic high-electron-mobility transistor technology and contains an RF 3-dB quadrature coupler, two subharmonically-pumped mixer cells, two IF low-noise amplifiers, and an LO chain including a frequency tripler, a band-pass filter, and two power amplifiers. The nonlinear circuits use an anti-parallel Schottky diode topology. The circuit covers an RF and IF bandwidth from at least 75 to 110 GHz and 3 to 13 GHz, respectively. The MMIC exhibits a single-sideband conversion gain of up to 17 dB and an average double-sideband noise figure in the range of 14.2-15.4 dB. The input-referred one-decibel compression point is up to -7 dBm. To the best of our knowledge, the presented W-band I/Q-down-conversion MMIC demonstrates state-of-the-art results with regards to complexity and performance.
{"title":"A Fully-Integrated W-Band I/Q-Down-Conversion MMIC for Use in Radio Astronomical Multi-Pixel Receivers","authors":"F. Thome, E. Ture, A. Leuther, F. Schäfer, A. Navarrini, P. Serres, O. Ambacher","doi":"10.1109/IMS30576.2020.9223856","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9223856","url":null,"abstract":"In this paper, a W-band I/Q-down-conversion monolithic microwave integrated circuit (MMIC) is presented. The MMIC is based on the Fraunhofer IAF 50-nm gate-length metamorphic high-electron-mobility transistor technology and contains an RF 3-dB quadrature coupler, two subharmonically-pumped mixer cells, two IF low-noise amplifiers, and an LO chain including a frequency tripler, a band-pass filter, and two power amplifiers. The nonlinear circuits use an anti-parallel Schottky diode topology. The circuit covers an RF and IF bandwidth from at least 75 to 110 GHz and 3 to 13 GHz, respectively. The MMIC exhibits a single-sideband conversion gain of up to 17 dB and an average double-sideband noise figure in the range of 14.2-15.4 dB. The input-referred one-decibel compression point is up to -7 dBm. To the best of our knowledge, the presented W-band I/Q-down-conversion MMIC demonstrates state-of-the-art results with regards to complexity and performance.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"115 1","pages":"193-196"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80814965","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9223785
Gianluca Fabi, C. H. Joseph, Xin Jin, Xiaopeng Wang, T. Pietrangelo, Xuanhong Cheng, J. Hwang, M. Farina
Near-field Scanning Microwave Microscopy (SMM) makes use of a high frequency signal to image and characterize electrical properties of samples. Recently, a new SMM setup was developed, the so called inverted-SMM (iSMM), whose biocompatibility allows its application to sample of biological interest. The experimental arrangement of the iSMM combines an Atomic Force Microscope (AFM), a Vector Network Analyser (VNA) and a slot line as a sample holder. In this work, a calibration protocol for reflection mode measurements is applied to the imaging of biological samples, in particular Jurkat cells. The complex local admittance of a single cell is extracted and the dielectric constant is estimated to be around 2.6 ± 0.3. Thus, the first quantitative characterization of iSMM operating in reflection mode is reported, as well as the first electrical characterization of Jurkat cells by this tool.
{"title":"Electrical properties of Jurkat cells: an inverted scanning microwave microscope study","authors":"Gianluca Fabi, C. H. Joseph, Xin Jin, Xiaopeng Wang, T. Pietrangelo, Xuanhong Cheng, J. Hwang, M. Farina","doi":"10.1109/IMS30576.2020.9223785","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9223785","url":null,"abstract":"Near-field Scanning Microwave Microscopy (SMM) makes use of a high frequency signal to image and characterize electrical properties of samples. Recently, a new SMM setup was developed, the so called inverted-SMM (iSMM), whose biocompatibility allows its application to sample of biological interest. The experimental arrangement of the iSMM combines an Atomic Force Microscope (AFM), a Vector Network Analyser (VNA) and a slot line as a sample holder. In this work, a calibration protocol for reflection mode measurements is applied to the imaging of biological samples, in particular Jurkat cells. The complex local admittance of a single cell is extracted and the dielectric constant is estimated to be around 2.6 ± 0.3. Thus, the first quantitative characterization of iSMM operating in reflection mode is reported, as well as the first electrical characterization of Jurkat cells by this tool.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"48 1","pages":"237-240"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88494290","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9224070
Jingzhou Pang, Yue Li, Chenhao Chu, Jun Peng, X. Zhou, A. Zhu
A load modulation network with characteristic impedance-modified transmission lines (TLs) is presented in this paper to extend the efficiency range and bandwidth of the Doherty power amplifier (DPA). Characteristic impedance values for designing the proposed DPA with different high efficiency ranges are given and wideband performance can also be achieved. A DPA with 2.55-3.35 GHz bandwidth using commercial GaN transistors is designed and implemented to validate the proposed architecture. The fabricated DPA achieves a measured 9.2-10.4 dB gain and 44.3-45.4 dBm saturated power. 57.9-75.6% and 47.6-58.8 % drain efficiency is achieved at saturation and 8 dB output power back-off (OBO) within the designed bandwidth, respectively. When driven by a 5-carrier 100 MHz OFDM signal with 8 dB peak to average power ratio (PAPR), the proposed DPA achieves adjacent channel leakage ratio (ACLR) of better than -50 dBc after digital pre-distortion with average efficiency of 53.4%, 55.3% and 56.6% at 2.75, 2.95 and 3.15 GHz centre frequencies.
{"title":"Extend High Efficiency Range of Doherty Power Amplifier by Modifying Characteristic Impedance of Transmission Lines in Load Modulation Network","authors":"Jingzhou Pang, Yue Li, Chenhao Chu, Jun Peng, X. Zhou, A. Zhu","doi":"10.1109/IMS30576.2020.9224070","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9224070","url":null,"abstract":"A load modulation network with characteristic impedance-modified transmission lines (TLs) is presented in this paper to extend the efficiency range and bandwidth of the Doherty power amplifier (DPA). Characteristic impedance values for designing the proposed DPA with different high efficiency ranges are given and wideband performance can also be achieved. A DPA with 2.55-3.35 GHz bandwidth using commercial GaN transistors is designed and implemented to validate the proposed architecture. The fabricated DPA achieves a measured 9.2-10.4 dB gain and 44.3-45.4 dBm saturated power. 57.9-75.6% and 47.6-58.8 % drain efficiency is achieved at saturation and 8 dB output power back-off (OBO) within the designed bandwidth, respectively. When driven by a 5-carrier 100 MHz OFDM signal with 8 dB peak to average power ratio (PAPR), the proposed DPA achieves adjacent channel leakage ratio (ACLR) of better than -50 dBc after digital pre-distortion with average efficiency of 53.4%, 55.3% and 56.6% at 2.75, 2.95 and 3.15 GHz centre frequencies.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"1 1","pages":"707-710"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89703182","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9223834
Soroush Rasti-Boroujeni, A. Wyrzykowska, M. Mazaheri, A. Palizban, S. Ituah, A. El-Gouhary, Guoyan Chen, H. Gharaei-Garakani, M. Nezhad-Ahmadi, S. Safavi-Naeini
A high efficiency 27–30 GHz 130nm BiCMOS transmitter front-end MMIC for mobile satellite communication phased-array is presented. The implemented chip consists of a gain control block with 15 dB gain variation, a 400 degree phase shifter and a high efficiency two stage power amplifier. The chip has a measured transducer gain of 23 dB and power consumption of 45 mW at $P_{1dB}$ of 10.8 dBm. The power added efficiency (PAE) of 26.7% is measured for the entire channel at $P_{1dB}$. An error vector magnitude (EVM) of -29 dB at $P_{out,avg}$ of 5.7 dBm and $PAE_{avg}$ of 12% is measured for a 400 MHz bandwidth 64-QAM (1.8 Gbps) modulated signal. The overall size of the chip is 2.1×0.8 mm2.
{"title":"A Power Efficient BiCMOS Ka-Band Transmitter Front-End for SATCOM Phased-Arrays","authors":"Soroush Rasti-Boroujeni, A. Wyrzykowska, M. Mazaheri, A. Palizban, S. Ituah, A. El-Gouhary, Guoyan Chen, H. Gharaei-Garakani, M. Nezhad-Ahmadi, S. Safavi-Naeini","doi":"10.1109/IMS30576.2020.9223834","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9223834","url":null,"abstract":"A high efficiency 27–30 GHz 130nm BiCMOS transmitter front-end MMIC for mobile satellite communication phased-array is presented. The implemented chip consists of a gain control block with 15 dB gain variation, a 400 degree phase shifter and a high efficiency two stage power amplifier. The chip has a measured transducer gain of 23 dB and power consumption of 45 mW at $P_{1dB}$ of 10.8 dBm. The power added efficiency (PAE) of 26.7% is measured for the entire channel at $P_{1dB}$. An error vector magnitude (EVM) of -29 dB at $P_{out,avg}$ of 5.7 dBm and $PAE_{avg}$ of 12% is measured for a 400 MHz bandwidth 64-QAM (1.8 Gbps) modulated signal. The overall size of the chip is 2.1×0.8 mm2.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"1 1","pages":"1223-1226"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90334419","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9223845
Navid Hosseinzadeh, Kelvin Fang, Luis A. Valenzuela, C. Schow, J. Buckwalter
This paper presents an integrated optical driver and Mach-Zehnder modulator (MZM) that operates to 50 Gb/$s$. The MZM consists of 4 traveling wave segments along a 3.2 mm length in a 90-nm Silicon Photonic (SiP) technology. The broadband distributed amplifier is a pseudo-differential design with 3-stack driver stages to deliver sufficient voltage swing in a 45nm CMOS SOI technology. The optical eye is open to 50 Gb/$s$ and indicates error-free operation to 30 Gb/$s$. The total circuit consumes 480 mW.
{"title":"A 50-Gb/s Optical Transmitter Based on Co-design of a 45-nm CMOS SOI Distributed Driver and 90-nm Silicon Photonic Mach-Zehnder Modulator","authors":"Navid Hosseinzadeh, Kelvin Fang, Luis A. Valenzuela, C. Schow, J. Buckwalter","doi":"10.1109/IMS30576.2020.9223845","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9223845","url":null,"abstract":"This paper presents an integrated optical driver and Mach-Zehnder modulator (MZM) that operates to 50 Gb/$s$. The MZM consists of 4 traveling wave segments along a 3.2 mm length in a 90-nm Silicon Photonic (SiP) technology. The broadband distributed amplifier is a pseudo-differential design with 3-stack driver stages to deliver sufficient voltage swing in a 45nm CMOS SOI technology. The optical eye is open to 50 Gb/$s$ and indicates error-free operation to 30 Gb/$s$. The total circuit consumes 480 mW.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"34 1","pages":"205-208"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76711850","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9223883
Ramon A. Beltran, Feiyu Wang, Greg Villagrana
A high-efficiency class- F power amplifier loading network based on a coaxial dielectric resonator is presented. Low loss and high dielectric constant are among the compelling characteristics that make a dielectric resonator an excellent candidate to realize high-efficiency amplifiers output networks in a circuit area significantly smaller than its microstrip equivalent. In order to achieve 82- W output power with 82 % efficiency, four class-F amplifiers are series-combined using a simple and novel synthesis technique. The results are verified with a UHF prototype at 500-MHz fundamental-frequency based upon GaN FETs. The four-amplifier system is in a 4×6 in area.
{"title":"Series-Combined Coaxial Dielectric Resonator Class-F Power Amplifier System","authors":"Ramon A. Beltran, Feiyu Wang, Greg Villagrana","doi":"10.1109/IMS30576.2020.9223883","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9223883","url":null,"abstract":"A high-efficiency class- F power amplifier loading network based on a coaxial dielectric resonator is presented. Low loss and high dielectric constant are among the compelling characteristics that make a dielectric resonator an excellent candidate to realize high-efficiency amplifiers output networks in a circuit area significantly smaller than its microstrip equivalent. In order to achieve 82- W output power with 82 % efficiency, four class-F amplifiers are series-combined using a simple and novel synthesis technique. The results are verified with a UHF prototype at 500-MHz fundamental-frequency based upon GaN FETs. The four-amplifier system is in a 4×6 in area.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"29 7 1","pages":"21-24"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78179944","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 : 2020-08-01DOI: 10.1109/IMS30576.2020.9223943
Siqi Wang, Wenhui Cao, T. Eriksson
Massive multi-input and multi-output (MIMO) systems request wideband power amplifiers (PA) for multi-band signal transmission. In this paper, we present different digital predistortion (DPD) techniques to linearize wideband PA with multi-band stimulus. We firstly propose a general form for pruned multi-band DPD models with low complexity. A study on the implementation complexities of different linearization methods is then analyzed. This paper provides a critical view on the metric of implementation complexity in function of the DPD model complexity and the sampling frequency of the signal processing. We finally propose a sampling frequency threshold to determine the best DPD solution according to the measurement results.
{"title":"Complexity Analysis of Wideband Power Amplifiers Linearization in Multi-band Signal Transmission for Massive MIMO systems","authors":"Siqi Wang, Wenhui Cao, T. Eriksson","doi":"10.1109/IMS30576.2020.9223943","DOIUrl":"https://doi.org/10.1109/IMS30576.2020.9223943","url":null,"abstract":"Massive multi-input and multi-output (MIMO) systems request wideband power amplifiers (PA) for multi-band signal transmission. In this paper, we present different digital predistortion (DPD) techniques to linearize wideband PA with multi-band stimulus. We firstly propose a general form for pruned multi-band DPD models with low complexity. A study on the implementation complexities of different linearization methods is then analyzed. This paper provides a critical view on the metric of implementation complexity in function of the DPD model complexity and the sampling frequency of the signal processing. We finally propose a sampling frequency threshold to determine the best DPD solution according to the measurement results.","PeriodicalId":6784,"journal":{"name":"2020 IEEE/MTT-S International Microwave Symposium (IMS)","volume":"28 1","pages":"960-963"},"PeriodicalIF":0.0,"publicationDate":"2020-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74970856","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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