Pub Date : 2019-08-06DOI: 10.1109/mwsym.2019.8700914
André Dürr, B. Schweizer, C. Waldschmidt
One common problem of frequency modulated continuous wave radar is leakage from the transmitter to the receiver. The leakage power is orders of magnitude larger than the target return power and appears as a very strong signal in the first few range bins. Additionally, the residual phase noise density of the local oscillator occurs around the leakage signal, which often raises the noise floor and limits the dynamic range of a radar system at the close proximity of the sensor. In this paper a novel system concept that cancels the phase noise around the dominating leakage path is proposed, mathematically derived, and proven by radar measurements with a radar demonstrator at 77 GHz.
{"title":"Leakage Phase Noise Mitigation for Monostatic FMCW Radar Sensors Using Carrier Transmission","authors":"André Dürr, B. Schweizer, C. Waldschmidt","doi":"10.1109/mwsym.2019.8700914","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8700914","url":null,"abstract":"One common problem of frequency modulated continuous wave radar is leakage from the transmitter to the receiver. The leakage power is orders of magnitude larger than the target return power and appears as a very strong signal in the first few range bins. Additionally, the residual phase noise density of the local oscillator occurs around the leakage signal, which often raises the noise floor and limits the dynamic range of a radar system at the close proximity of the sensor. In this paper a novel system concept that cancels the phase noise around the dominating leakage path is proposed, mathematically derived, and proven by radar measurements with a radar demonstrator at 77 GHz.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"57 1","pages":"1092-1095"},"PeriodicalIF":0.0,"publicationDate":"2019-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84574662","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8701013
Masaya Tamura, Kousuke Murai, Yasumasa Naka
This paper presents a capacitive coupler utilizing an electric double layer for wireless power transfer under seawater. Since seawater is an electrolyte solution, an electric double layer (EDL) is formed on the electrode surface of the coupler in direct current. If the EDL can be utilized in RF frequency, it is possible that high power transfer efficiency can be achieved under seawater because a high Q-factor can be obtained. To clarify this possibility, first, the frequency characteristics of the complex permittivity in seawater is measured and the behaviors of the EDL and electric conductivity are elucidated from the results. Next, it is clarified that EDL leads to an improvement in the Q-factor of seawater. Finally, it is demonstrated that the efficiency with the designed coupler under seawater can achieve about 91.1% by the single-ended model and 55.3% by the differential model.
{"title":"Capacitive Coupler Utilizing Electric Double Layer for Wireless Power Transfer Under Seawater","authors":"Masaya Tamura, Kousuke Murai, Yasumasa Naka","doi":"10.1109/mwsym.2019.8701013","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8701013","url":null,"abstract":"This paper presents a capacitive coupler utilizing an electric double layer for wireless power transfer under seawater. Since seawater is an electrolyte solution, an electric double layer (EDL) is formed on the electrode surface of the coupler in direct current. If the EDL can be utilized in RF frequency, it is possible that high power transfer efficiency can be achieved under seawater because a high Q-factor can be obtained. To clarify this possibility, first, the frequency characteristics of the complex permittivity in seawater is measured and the behaviors of the EDL and electric conductivity are elucidated from the results. Next, it is clarified that EDL leads to an improvement in the Q-factor of seawater. Finally, it is demonstrated that the efficiency with the designed coupler under seawater can achieve about 91.1% by the single-ended model and 55.3% by the differential model.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"51 1","pages":"1415-1418"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75196739","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8701079
A. Arias, P. Rowell, M. Urteaga, Z. Griffith, K. Shinohara, J. Bergman, A. Carter, R. Pierson, B. Brar, J. Buckwalter, M. Rodwell
We report a 250nm InP HBT MMIC that demonstrates record output power at 44 GHz for its chip size, having a small signal bandwidth of 25 - 50 GHz, and operating from a 2.5-2.8 V supply. The reported power amplifier delivers up to 185 mW and has a peak PAE of 38% at 44 GHz. The results in this work highlight the relevance of 250nm InP HBT devices for emerging size-constrained platforms including MIMO communication front-ends and radar applications.
{"title":"185mW InP HBT Power Amplifier with 1 Octave Bandwidth (2550GHz), 38% peak PAE at 44GHz and Chip Area of 276 x 672 μm2","authors":"A. Arias, P. Rowell, M. Urteaga, Z. Griffith, K. Shinohara, J. Bergman, A. Carter, R. Pierson, B. Brar, J. Buckwalter, M. Rodwell","doi":"10.1109/mwsym.2019.8701079","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8701079","url":null,"abstract":"We report a 250nm InP HBT MMIC that demonstrates record output power at 44 GHz for its chip size, having a small signal bandwidth of 25 - 50 GHz, and operating from a 2.5-2.8 V supply. The reported power amplifier delivers up to 185 mW and has a peak PAE of 38% at 44 GHz. The results in this work highlight the relevance of 250nm InP HBT devices for emerging size-constrained platforms including MIMO communication front-ends and radar applications.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"18 1","pages":"1303-1305"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75033839","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8700922
J. Cuper, M. Rytel, T. Karpisz, A. Pacewicz, B. Salski, P. Kopyt
The paper describes two test setups allowing one to measure over the Ka-band the scalar transmission coefficient of a state-of-the-art high-Q Fabry-Pérot open resonators that are often used for measurement of properties of low-loss materials. Both setups described herein employ readily-available components. Their performance is verified against measurements performed using a laboratory-grade vector network analyzer for two exemplary material samples and agreement is found, which demonstrates that an effective Ka-band material properties measurement system can be realized also without high-end laboratory equipment.
{"title":"Ka-band Compact Scalar Network Analyzer Dedicated to Resonator-based Measurements of Material Properties","authors":"J. Cuper, M. Rytel, T. Karpisz, A. Pacewicz, B. Salski, P. Kopyt","doi":"10.1109/mwsym.2019.8700922","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8700922","url":null,"abstract":"The paper describes two test setups allowing one to measure over the Ka-band the scalar transmission coefficient of a state-of-the-art high-Q Fabry-Pérot open resonators that are often used for measurement of properties of low-loss materials. Both setups described herein employ readily-available components. Their performance is verified against measurements performed using a laboratory-grade vector network analyzer for two exemplary material samples and agreement is found, which demonstrates that an effective Ka-band material properties measurement system can be realized also without high-end laboratory equipment.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"38 1","pages":"51-54"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79142906","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8700893
Umut Kodak, Bhaskara Rupakula, S. Zihir, Gabriel M. Rebeiz
This paper presents a scalable 60 GHz 2x64-element transmit/receive (TRX) dual-polarized/dual-beam wafer-scale phased-array with integrated dual up/down converters. The entire phased-array is built as a single reticle and occupies 21x21 mm2. The phased-array is based on RF beam-forming TRX channels with 5-bit phase control, 9-bit amplitude control, 1:64 nested distribution networks with amplifiers, and dual-transceivers with a shared LO path for transmit and receive modes. The high-efficiency quartz superstrate dipole antennas are electromagnetically coupled to the TRX channels using on-wafer antenna feeds, which are spaced λ/2 apart in the x- and y-directions. The 64-element array scans to ±50° and results in near ideal patterns for both polarizations in the E- and H-planes with side-lobe and cross-polarization levels <-13 dB and <-30 dB, respectively. The measured saturated EIRP is 38.5 dBm and 37 dBm for V- and H-polarizations with ~60-64 GHz 3-dB bandwidth, respectively. A communication link is also demonstrated with 64-QAM waveform achieving 4.2 Gbps at 1.25 m distance with 2.63% EVM. The phased-array is infinitely-scalable and to the best of our knowledge, this paper presents the first fully-polarimetric large-scale transmit/receive phased-array with dual transceivers.
{"title":"A Scalable 60 GHz Tx/Rx 2x64-Element Dual-Polarized Dual-Beam Wafer-Scale Phased-Array with Integrated Dual-Transceivers","authors":"Umut Kodak, Bhaskara Rupakula, S. Zihir, Gabriel M. Rebeiz","doi":"10.1109/mwsym.2019.8700893","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8700893","url":null,"abstract":"This paper presents a scalable 60 GHz 2x64-element transmit/receive (TRX) dual-polarized/dual-beam wafer-scale phased-array with integrated dual up/down converters. The entire phased-array is built as a single reticle and occupies 21x21 mm2. The phased-array is based on RF beam-forming TRX channels with 5-bit phase control, 9-bit amplitude control, 1:64 nested distribution networks with amplifiers, and dual-transceivers with a shared LO path for transmit and receive modes. The high-efficiency quartz superstrate dipole antennas are electromagnetically coupled to the TRX channels using on-wafer antenna feeds, which are spaced λ/2 apart in the x- and y-directions. The 64-element array scans to ±50° and results in near ideal patterns for both polarizations in the E- and H-planes with side-lobe and cross-polarization levels <-13 dB and <-30 dB, respectively. The measured saturated EIRP is 38.5 dBm and 37 dBm for V- and H-polarizations with ~60-64 GHz 3-dB bandwidth, respectively. A communication link is also demonstrated with 64-QAM waveform achieving 4.2 Gbps at 1.25 m distance with 2.63% EVM. The phased-array is infinitely-scalable and to the best of our knowledge, this paper presents the first fully-polarimetric large-scale transmit/receive phased-array with dual transceivers.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"4 1","pages":"1068-1071"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81612832","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8701096
Tommaso A. Cappello, Shane Verploegh, C. Florian, Z. Popovic
This paper addresses the efficiency enhancement of microwave power amplifiers (PAs) with discrete-level supply-modulation. We demonstrate an efficient modulator architecture that generates three levels of drain supply voltages from a single dc voltage. Each level is stored in a "flying" capacitor that acts as a temporary voltage supply and is dynamically regulated by feedback through reversal of the PA drain current. A hybrid modulator based on GaN-on-Si technology is tested with a single-stage 2-W X-band MMIC PA with a drain efficiency of 55% at the peak output power. The overall average drain efficiency (PA and modulator) of up to 43% is measured with Gaussian-like pulses for radar and a 5-MHz 6-dB PAPR OFDM signal, and is improved up to 14 percentage points over a constant supply case, with normalized root mean square error below 1.5% when pre-distortion is used.
本文研究了用离散级电源调制技术提高微波功率放大器的效率。我们演示了一种高效的调制器结构，它可以从单个直流电压产生三个水平的漏极电源电压。每个电平都存储在一个“飞行”电容器中，作为临时电压供应，并通过PA漏极电流的反转反馈动态调节。基于GaN-on-Si技术的混合调制器在单级2-W x波段MMIC PA上进行了测试，峰值输出功率的漏极效率为55%。使用雷达类高斯脉冲和5 mhz 6 db PAPR OFDM信号测量的总体平均漏极效率(PA和调制器)高达43%，比恒定电源情况下提高了14个百分点，使用预失真时标准化均方根误差低于1.5%。
{"title":"Single-DC-Input Multi-Level Envelope Tracking of a High-Efficiency X-band Power Amplifier","authors":"Tommaso A. Cappello, Shane Verploegh, C. Florian, Z. Popovic","doi":"10.1109/mwsym.2019.8701096","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8701096","url":null,"abstract":"This paper addresses the efficiency enhancement of microwave power amplifiers (PAs) with discrete-level supply-modulation. We demonstrate an efficient modulator architecture that generates three levels of drain supply voltages from a single dc voltage. Each level is stored in a \"flying\" capacitor that acts as a temporary voltage supply and is dynamically regulated by feedback through reversal of the PA drain current. A hybrid modulator based on GaN-on-Si technology is tested with a single-stage 2-W X-band MMIC PA with a drain efficiency of 55% at the peak output power. The overall average drain efficiency (PA and modulator) of up to 43% is measured with Gaussian-like pulses for radar and a 5-MHz 6-dB PAPR OFDM signal, and is improved up to 14 percentage points over a constant supply case, with normalized root mean square error below 1.5% when pre-distortion is used.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"3 1","pages":"464-467"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84326206","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8700971
Paris Ang, G. Eleftheriades
A surface conformal array of conventional antennas can be configured to actively cloak an object, preventing it from scattering an impinging electromagnetic wave. This technique is advantageous as it can be implemented with commercially available components while its active nature can mitigate passivity based constraints. Although efforts have been made to conceptually expand this technique to more complex scenarios, experimental validation past simple uniform scatterers is lacking. This paper seeks to remedy this deficiency by presenting the experimental demonstration of a low profile active cloak, constructed from commercially available monopoles, designed to conceal a metallic polygonal target. The design and configuration of the cloak and experimental apparatus are explored. Field measurements, taken when the target is illuminated by a 1.2 GHz cylindrical wave, indicate an average scattering suppression of 5.6 dB. Overall performance was found to be impacted by design and apparatus imperfections.
{"title":"Experimental Active Cloaking of a Metallic Polygonal Cylinder","authors":"Paris Ang, G. Eleftheriades","doi":"10.1109/mwsym.2019.8700971","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8700971","url":null,"abstract":"A surface conformal array of conventional antennas can be configured to actively cloak an object, preventing it from scattering an impinging electromagnetic wave. This technique is advantageous as it can be implemented with commercially available components while its active nature can mitigate passivity based constraints. Although efforts have been made to conceptually expand this technique to more complex scenarios, experimental validation past simple uniform scatterers is lacking. This paper seeks to remedy this deficiency by presenting the experimental demonstration of a low profile active cloak, constructed from commercially available monopoles, designed to conceal a metallic polygonal target. The design and configuration of the cloak and experimental apparatus are explored. Field measurements, taken when the target is illuminated by a 1.2 GHz cylindrical wave, indicate an average scattering suppression of 5.6 dB. Overall performance was found to be impacted by design and apparatus imperfections.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"21 1","pages":"39-42"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84474039","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8700796
M. Hagag, M. A. Khater, D. Peroulis
Multifunctional RF components are of great benefit to wireless systems, as they can reduce size and power consumption. A fully balanced Low-Noise Amplifier (LNA), with embedded tunable filtering functionality, using a single transistor, is presented in this paper. The design concept is based on evanescent-mode cavity resonators at the input and the output. The resonators provide filtering, in addition to balanced (BAL) external coupling and a Single-Ended (SE) internal coupling with the core LNA. The internal coupling provides the minimum noise matching to the transistor. A proof-of-concept design is fabricated using a PCB process. The measured results demonstrate a tuning range from 2.8–4 GHz with a noise figure ranging from 3.4–4.6 dB, a balanced gain of 16.7–14.2 dB, and a CMRR of better than 55 dB. The presented BAL-BAL LNA can seamlessly interface with fully balanced RF systems.
{"title":"Balanced-Balanced Tunable Filtering LNA using Evanescent-Mode Resonators","authors":"M. Hagag, M. A. Khater, D. Peroulis","doi":"10.1109/mwsym.2019.8700796","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8700796","url":null,"abstract":"Multifunctional RF components are of great benefit to wireless systems, as they can reduce size and power consumption. A fully balanced Low-Noise Amplifier (LNA), with embedded tunable filtering functionality, using a single transistor, is presented in this paper. The design concept is based on evanescent-mode cavity resonators at the input and the output. The resonators provide filtering, in addition to balanced (BAL) external coupling and a Single-Ended (SE) internal coupling with the core LNA. The internal coupling provides the minimum noise matching to the transistor. A proof-of-concept design is fabricated using a PCB process. The measured results demonstrate a tuning range from 2.8–4 GHz with a noise figure ranging from 3.4–4.6 dB, a balanced gain of 16.7–14.2 dB, and a CMRR of better than 55 dB. The presented BAL-BAL LNA can seamlessly interface with fully balanced RF systems.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"12 1","pages":"13-16"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85207685","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8700902
H. Ladhani, Jeffrey K. Jones, J. Stevenson Kenney
RF Pre-Matching of High Power Transistors involves considerations of impedance matching, RF Bandwidth, phase characteristics as well as physical realization. Due to the increase in signal bandwidth requirements of next generation applications, it has become necessary to incorporate baseband impedance circuits to ensure the power transistor is capable of amplifying these signals with minimum distortion as well as correct within specifications using digital predistortion systems. In this paper we analyze the baseband response of a widely used pre matching topology for RF Power Transistors as well as propose and analyze modifications that allow for improved large signal bandwidth operation. The results show than an ACLR improvement of approximately 10dB resulted from the addition of an integrated bias network with damping resistance using the same DPD complexity.
{"title":"Analysis of the Baseband Termination of High Power RF Transistors","authors":"H. Ladhani, Jeffrey K. Jones, J. Stevenson Kenney","doi":"10.1109/mwsym.2019.8700902","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8700902","url":null,"abstract":"RF Pre-Matching of High Power Transistors involves considerations of impedance matching, RF Bandwidth, phase characteristics as well as physical realization. Due to the increase in signal bandwidth requirements of next generation applications, it has become necessary to incorporate baseband impedance circuits to ensure the power transistor is capable of amplifying these signals with minimum distortion as well as correct within specifications using digital predistortion systems. In this paper we analyze the baseband response of a widely used pre matching topology for RF Power Transistors as well as propose and analyze modifications that allow for improved large signal bandwidth operation. The results show than an ACLR improvement of approximately 10dB resulted from the addition of an integrated bias network with damping resistance using the same DPD complexity.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"58 1","pages":"1168-1170"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83941621","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 : 2019-06-02DOI: 10.1109/mwsym.2019.8700945
Li Zhu, R. Mansour, Ming Yu
This paper presents a novel configuration of dual-band filter employing TE11m dual-mode elliptical cavity resonators. The proposed side-coupled configuration leads to a significant reduction of filter footprint compared to previously reported dual-band filter structures. Such configuration also facilitates cross-couplings to realize advanced quasi-elliptic filter functions. To demonstrate the concept, an 8-pole C-band elliptical cavity dual-band filter is designed, manufactured and measured.
{"title":"A Compact Waveguide Quasi-Elliptic Dual-Band Filter","authors":"Li Zhu, R. Mansour, Ming Yu","doi":"10.1109/mwsym.2019.8700945","DOIUrl":"https://doi.org/10.1109/mwsym.2019.8700945","url":null,"abstract":"This paper presents a novel configuration of dual-band filter employing TE11m dual-mode elliptical cavity resonators. The proposed side-coupled configuration leads to a significant reduction of filter footprint compared to previously reported dual-band filter structures. Such configuration also facilitates cross-couplings to realize advanced quasi-elliptic filter functions. To demonstrate the concept, an 8-pole C-band elliptical cavity dual-band filter is designed, manufactured and measured.","PeriodicalId":6720,"journal":{"name":"2019 IEEE MTT-S International Microwave Symposium (IMS)","volume":"11 1","pages":"1179-1182"},"PeriodicalIF":0.0,"publicationDate":"2019-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79190672","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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