Pub Date : 2020-12-08DOI: 10.1109/APMC47863.2020.9331364
Abdul Ali, W. Ahmad, H. Ng, D. Kissinger, F. Giannini, P. Colantonio
A wideband 4-way combined power amplifier (PA) in a $0.13-mu mathrm{m}$ BiCMOS process is presented. The overall PA is based on four unit cells of 3-stage cascode PA, which is adopted for larger output power and higher gain. Load pull simulations are done to optimize the unit cells together with the 4-way combiner for wideband characteristics. With the assistance of hicum and vbic models, the overall PA shows a peak gain of 30dB at 126GHz with the 3-dB bandwidth higher than 80GHz. Under large-signal excitation, the PA delivers a maximum output power greater than 17.5dBm at 120-180 GHz with peak PAE higher than 5%. The PA can be used for various future D-band applications. Measurements are on the way and will be presented into the final contribution.
提出了一种采用$0.13-mu math {m}$ BiCMOS工艺的宽带4路组合功率放大器(PA)。整体放大器基于4个三级级联放大器单元格，采用三级级联放大器实现更大的输出功率和更高的增益。通过负载拉仿真，优化了单元格和4路合成器的宽带特性。在hicum和vbic模型的辅助下，整体放大器在126GHz时的峰值增益为30dB, 3db带宽高于80GHz。在大信号激励下，该放大器在120 ~ 180 GHz频段的最大输出功率大于17.5dBm，峰值PAE高于5%。PA可用于未来的各种d波段应用。测量正在进行中，并将呈现在最终贡献中。
{"title":"Wideband 4-Way Combined Power Amplifier in BiCMOS Technology for D-Band Applications","authors":"Abdul Ali, W. Ahmad, H. Ng, D. Kissinger, F. Giannini, P. Colantonio","doi":"10.1109/APMC47863.2020.9331364","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331364","url":null,"abstract":"A wideband 4-way combined power amplifier (PA) in a $0.13-mu mathrm{m}$ BiCMOS process is presented. The overall PA is based on four unit cells of 3-stage cascode PA, which is adopted for larger output power and higher gain. Load pull simulations are done to optimize the unit cells together with the 4-way combiner for wideband characteristics. With the assistance of hicum and vbic models, the overall PA shows a peak gain of 30dB at 126GHz with the 3-dB bandwidth higher than 80GHz. Under large-signal excitation, the PA delivers a maximum output power greater than 17.5dBm at 120-180 GHz with peak PAE higher than 5%. The PA can be used for various future D-band applications. Measurements are on the way and will be presented into the final contribution.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115727151","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331451
Raja Usman Tariq, M. Ye, Yong-ning He
Distortions occurred due to the presence of nonlinearities in radio frequency and microwave circuits severely influence the performance of telecom industry. Most dominant of these distortions include harmonic and passive intermodulation distortion. To evaluate both of these distortions of any device-under-test (DUT) require separate complex measurement setup moreover, just after the fabrication of any DUT, it is mandatory to measure its S-parameters (S-par). Repetition of assembling and disassembling of DUT with the test set-ups introduce uncertainties in the measurement results; moreover, these tests consume a lot of time, human energy and decrease the life span of cables and connectors. In literature, few of the devices or measurement setups introduced to measurement the S-par & PIM, or S-par & HD. While, a comprehensive measurement set-up critically required to measure all these properties altogether without disconnecting the DUT. This research aims to develop high-quality test set-up to measure S-par, HD, and PIM circuits in a brief time.
{"title":"Development of Single Measurement Setup to Test S-Parameters and Distortions of Microwave Devices","authors":"Raja Usman Tariq, M. Ye, Yong-ning He","doi":"10.1109/APMC47863.2020.9331451","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331451","url":null,"abstract":"Distortions occurred due to the presence of nonlinearities in radio frequency and microwave circuits severely influence the performance of telecom industry. Most dominant of these distortions include harmonic and passive intermodulation distortion. To evaluate both of these distortions of any device-under-test (DUT) require separate complex measurement setup moreover, just after the fabrication of any DUT, it is mandatory to measure its S-parameters (S-par). Repetition of assembling and disassembling of DUT with the test set-ups introduce uncertainties in the measurement results; moreover, these tests consume a lot of time, human energy and decrease the life span of cables and connectors. In literature, few of the devices or measurement setups introduced to measurement the S-par & PIM, or S-par & HD. While, a comprehensive measurement set-up critically required to measure all these properties altogether without disconnecting the DUT. This research aims to develop high-quality test set-up to measure S-par, HD, and PIM circuits in a brief time.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116669351","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331664
Yi Wang, Tongde Huang, Wen Wu, Yuehua Li
A novel on-chip wideband bandpass filter (denoted as BPF-A) and a BPF with a tunable transmission zero (denoted as BPF-B) are presented. The proposed BPFs, featuring two ring resonators, are routed in octagonal interwinding shape, and a wide bandwidth is realized by strong coupling between the two resonators in this special routing way. A transmission zero is generated by loading stubs at the input and output ports. To further improve the selectivity of the proposed BPF, a MOS-varactor is adopted at the end of the loaded stub to flexibly adjust the location of the transmission zero. Moreover, theoretical analyses of the BPFs are performed based on LC-equivalent circuit. The measured results show BPF-A has a center frequency of 31.9 GHz, a bandwidth of 51.5%, an insertion loss of 4.9 dB and a transmission zero at 70.7 GHz. The BPF-B shows flexible tunability of transmission zero.
{"title":"Octagonal On-chip Wideband Bandpass Filter with a Tunable Transmission Zero in 0.18-μm (Bi)-CMOS Technology","authors":"Yi Wang, Tongde Huang, Wen Wu, Yuehua Li","doi":"10.1109/APMC47863.2020.9331664","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331664","url":null,"abstract":"A novel on-chip wideband bandpass filter (denoted as BPF-A) and a BPF with a tunable transmission zero (denoted as BPF-B) are presented. The proposed BPFs, featuring two ring resonators, are routed in octagonal interwinding shape, and a wide bandwidth is realized by strong coupling between the two resonators in this special routing way. A transmission zero is generated by loading stubs at the input and output ports. To further improve the selectivity of the proposed BPF, a MOS-varactor is adopted at the end of the loaded stub to flexibly adjust the location of the transmission zero. Moreover, theoretical analyses of the BPFs are performed based on LC-equivalent circuit. The measured results show BPF-A has a center frequency of 31.9 GHz, a bandwidth of 51.5%, an insertion loss of 4.9 dB and a transmission zero at 70.7 GHz. The BPF-B shows flexible tunability of transmission zero.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116766561","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331401
Nan Zhang, Xiaolong Wang, Zhewang Ma, Chun-Ping Chen
A wideband bandpass filter using coupled lines with sharp roll-off shirts is proposed in this paper. Seven transmission poles within the passband and high out-band rejection performance can be realized through even-and oddmode input impedance calculations. For demonstration, a wideband bandpass filter prototype centered at 1.5 GHz with high-stopband rejection is designed and fabricated. Good agreement between the simulations and measurements validates the design idea.
{"title":"Wideband Bandpass Filter Using Coupled Lines With Multiple Transmission Poles and Good Outband Performance","authors":"Nan Zhang, Xiaolong Wang, Zhewang Ma, Chun-Ping Chen","doi":"10.1109/APMC47863.2020.9331401","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331401","url":null,"abstract":"A wideband bandpass filter using coupled lines with sharp roll-off shirts is proposed in this paper. Seven transmission poles within the passband and high out-band rejection performance can be realized through even-and oddmode input impedance calculations. For demonstration, a wideband bandpass filter prototype centered at 1.5 GHz with high-stopband rejection is designed and fabricated. Good agreement between the simulations and measurements validates the design idea.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"99 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116803333","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331608
Bosang Pan, Haoshen Zhu, W. Feng, W. Che, Q. Xue
A compact balanced bandpass filter with wideband common mode suppression is proposed. Swap structures based on double-sided parallel-strip line (DSPSL) are used to realize 180° phase invert, which can provide an inherent common mode suppression in a wideband, and compared with half-wavelength transmission line in other work, this swap structure greatly reduces the size of the balanced filter and achieve a compact structure. Two transmission zeros are introduced by dual-mode ring resonator lead to high selectivity. One prototype center at 2.2 GHz was designed and fabricated, 3-dB factional bandwidth of 23.6% and over 20 dB common mode suppression extend to $2.91f_{0}$. Simulated results are in good agreement with measured results.
{"title":"Compact Balanced Bandpass Filter With Wideband Common Mode Suppression","authors":"Bosang Pan, Haoshen Zhu, W. Feng, W. Che, Q. Xue","doi":"10.1109/APMC47863.2020.9331608","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331608","url":null,"abstract":"A compact balanced bandpass filter with wideband common mode suppression is proposed. Swap structures based on double-sided parallel-strip line (DSPSL) are used to realize 180° phase invert, which can provide an inherent common mode suppression in a wideband, and compared with half-wavelength transmission line in other work, this swap structure greatly reduces the size of the balanced filter and achieve a compact structure. Two transmission zeros are introduced by dual-mode ring resonator lead to high selectivity. One prototype center at 2.2 GHz was designed and fabricated, 3-dB factional bandwidth of 23.6% and over 20 dB common mode suppression extend to $2.91f_{0}$. Simulated results are in good agreement with measured results.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120841335","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331627
H. Nusantara, R. A. R. Q. Y. Putri, Hartuti Mistialustina, A. Munir
This paper deals with the development of narrowband bandpass filter (BPF) made of a waveguide loaded by split ring resonator (SRR) based frequency selective surfaces (FSS). The structure of FSS loaded into the waveguide is developed by two layers of Arlon DiClad 527 dielectric substrate flank some structures of SRR. Two different configurations of SRR-based FSS structure, i.e. one SRR and two SRRs, are involved in the design of narrowband waveguide BPF and analyzed in terms of working bandwidth, return loss, and transmission loss. The results show that the waveguide BPF with two SRRs has a wider working bandwidth and better performance compared to the other with one SRR. The realized narrowband waveguide BPF with two SRRs has the working bandwidth of 240MHz in the frequency range of 7.32GHz to 7.56GHz which has good agreement with the simulation.
{"title":"Narrowband BPF Made of Waveguide Loaded by SRR-based Frequency Selective Surfaces","authors":"H. Nusantara, R. A. R. Q. Y. Putri, Hartuti Mistialustina, A. Munir","doi":"10.1109/APMC47863.2020.9331627","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331627","url":null,"abstract":"This paper deals with the development of narrowband bandpass filter (BPF) made of a waveguide loaded by split ring resonator (SRR) based frequency selective surfaces (FSS). The structure of FSS loaded into the waveguide is developed by two layers of Arlon DiClad 527 dielectric substrate flank some structures of SRR. Two different configurations of SRR-based FSS structure, i.e. one SRR and two SRRs, are involved in the design of narrowband waveguide BPF and analyzed in terms of working bandwidth, return loss, and transmission loss. The results show that the waveguide BPF with two SRRs has a wider working bandwidth and better performance compared to the other with one SRR. The realized narrowband waveguide BPF with two SRRs has the working bandwidth of 240MHz in the frequency range of 7.32GHz to 7.56GHz which has good agreement with the simulation.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120950370","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331555
Jinfeng Li
This work numerically investigates a novel insertion loss mitigation strategy by shaping the core line’s edge profile in hexagonal, trapezoidal, and rounded configurations for an enclosed coplanar waveguide filled with liquid crystals as tunable dielectrics. As compared with a right-angled core line, full-wave simulation results show that the optimal hexagonal edge profile with a chopping angle of 7.12° and offset distance of $17mu m$ reduces the insertion loss by 0.57 dB at 60 GHz for a 0$-pi$ phase shifter, while trapezoidal and rounded core edges degrade the forward transmission by 2.59 dB and 0.26 dB, respectively.
{"title":"Managing 60 GHz Field Peaking of an Liquid Crystal Enclosed Coplanar Waveguide by Core Edge Shaping","authors":"Jinfeng Li","doi":"10.1109/APMC47863.2020.9331555","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331555","url":null,"abstract":"This work numerically investigates a novel insertion loss mitigation strategy by shaping the core line’s edge profile in hexagonal, trapezoidal, and rounded configurations for an enclosed coplanar waveguide filled with liquid crystals as tunable dielectrics. As compared with a right-angled core line, full-wave simulation results show that the optimal hexagonal edge profile with a chopping angle of 7.12° and offset distance of $17mu m$ reduces the insertion loss by 0.57 dB at 60 GHz for a 0$-pi$ phase shifter, while trapezoidal and rounded core edges degrade the forward transmission by 2.59 dB and 0.26 dB, respectively.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"412 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124847697","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331728
Hongjia Huang, Lei Ge
A wideband cylindrical dielectric resonator antenna (DRA) using inserted metallic ring is presented. Before giving the specific designs, an analysis about E-field distribution of $TM_{02sigma}$ mode is carried out and an engineering formula for calculating the resonance frequency of $TM_{02sigma}$ mode in a cylindrical dielectric resonator (DR) is proposed. The errors between the results obtained by the proposed engineering formula and that of the dielectric waveguide model (DWM) method are less than 2%. Based on the analysis of E-field distribution, the wideband DRA is proposed, which introduces an inserted metallic ring in the cylindrical DR to adjust the resonance frequency of $TM_{02sigma}$ mode. By the use of the metallic ring, the resonance frequencies of $TM_{01sigma}$ and $TM_{02sigma}$ modes are closely located and can support a wide (a) operating band of 21.2%.
{"title":"A Wideband Cylindrical Dielectric Resonator Antenna Using Inserted Metallic Ring","authors":"Hongjia Huang, Lei Ge","doi":"10.1109/APMC47863.2020.9331728","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331728","url":null,"abstract":"A wideband cylindrical dielectric resonator antenna (DRA) using inserted metallic ring is presented. Before giving the specific designs, an analysis about E-field distribution of $TM_{02sigma}$ mode is carried out and an engineering formula for calculating the resonance frequency of $TM_{02sigma}$ mode in a cylindrical dielectric resonator (DR) is proposed. The errors between the results obtained by the proposed engineering formula and that of the dielectric waveguide model (DWM) method are less than 2%. Based on the analysis of E-field distribution, the wideband DRA is proposed, which introduces an inserted metallic ring in the cylindrical DR to adjust the resonance frequency of $TM_{02sigma}$ mode. By the use of the metallic ring, the resonance frequencies of $TM_{01sigma}$ and $TM_{02sigma}$ modes are closely located and can support a wide (a) operating band of 21.2%.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"425 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123402734","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331332
Wei Lin, R. Ziolkowski
An omnidirectional horizontally polarized (OHP) magnetic dipole array is reported that achieves a high directivity and has a simple configuration. This OHP array is facilitated by a partially folded $TE_{0.5,0}$ mode rectangular waveguide. A set of folded sections along the waveguide realize collinear and in-phase magnetic dipole radiators thanks to the effective cancellation of the out-of-phase electric fields in them. The entire waveguide is excited by a microstrip feedline via a shorting pin in the middle. A design model has been optimized for the 2.5 GHz WLAN band and achieves excellent radiation performance. The simulated -10dB impedance bandwidth covers 190 MHz (7.8%) from 2.33 to 2.52 GHz. The realized gain values are stable across the entire bandwidth with a 8.7 dBi peak value. Good omnidirectional radiation patterns are also observed with the out-of-roundness value less than 3 dB. The presented OHP magnetic dipole array is an ideal candidate for point-to-multipoint communication or wireless power transfer applications.
{"title":"Omnidirectional Horizontally Polarized Magnetic Dipole Array Facilitated by Folded TE0.5,0 Mode Waveguide","authors":"Wei Lin, R. Ziolkowski","doi":"10.1109/APMC47863.2020.9331332","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331332","url":null,"abstract":"An omnidirectional horizontally polarized (OHP) magnetic dipole array is reported that achieves a high directivity and has a simple configuration. This OHP array is facilitated by a partially folded $TE_{0.5,0}$ mode rectangular waveguide. A set of folded sections along the waveguide realize collinear and in-phase magnetic dipole radiators thanks to the effective cancellation of the out-of-phase electric fields in them. The entire waveguide is excited by a microstrip feedline via a shorting pin in the middle. A design model has been optimized for the 2.5 GHz WLAN band and achieves excellent radiation performance. The simulated -10dB impedance bandwidth covers 190 MHz (7.8%) from 2.33 to 2.52 GHz. The realized gain values are stable across the entire bandwidth with a 8.7 dBi peak value. Good omnidirectional radiation patterns are also observed with the out-of-roundness value less than 3 dB. The presented OHP magnetic dipole array is an ideal candidate for point-to-multipoint communication or wireless power transfer applications.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126720478","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 : 2020-12-08DOI: 10.1109/APMC47863.2020.9331656
Zheng Zhang, C. Ruan
In this paper, a higher order mode (TE20 mode) staggered double vane travelling wave tube with two pencil beam tunnels operating at 220GHz is designed and optimized. To suppress the fundamental mode competition and get a stable output, we use a three-stage structure and set dielectric boards in the center of the SWS. 3D PIC simulation shows that with the beam voltage of 21.3kV and each beam current of 0.04A, this higher order mode (TE20 mode) SDV-TWT has a 53W stable output power at 220GHz, a 26.2dB gain and a 30GHz bandwidth from 207 to 237GHz.
{"title":"Design of a 220GHz TE20 Higher Order Mode SDVSWS TWT Amplifier","authors":"Zheng Zhang, C. Ruan","doi":"10.1109/APMC47863.2020.9331656","DOIUrl":"https://doi.org/10.1109/APMC47863.2020.9331656","url":null,"abstract":"In this paper, a higher order mode (TE20 mode) staggered double vane travelling wave tube with two pencil beam tunnels operating at 220GHz is designed and optimized. To suppress the fundamental mode competition and get a stable output, we use a three-stage structure and set dielectric boards in the center of the SWS. 3D PIC simulation shows that with the beam voltage of 21.3kV and each beam current of 0.04A, this higher order mode (TE20 mode) SDV-TWT has a 53W stable output power at 220GHz, a 26.2dB gain and a 30GHz bandwidth from 207 to 237GHz.","PeriodicalId":413224,"journal":{"name":"2020 IEEE Asia-Pacific Microwave Conference (APMC)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122452582","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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