The impedance characteristic of folded-waveguide (FW) slow-wave structure (SWS) is studied in this paper. The impedance parameters are determined by the high-frequency parameters, especially the digital electromagnetic field data from a high-frequency structure simulator. After the analysis of the gap impedance of different radii and different angles, the formula of interaction impedance is presented. Finally, the coupling impedance is studied and compared with the interaction impedance. The method can be applied to other complex SWSs that lack of effective analytical methods.
{"title":"Study of the Cold Impedance Characteristic of Folded-waveguide SWSs","authors":"Weizhong Yan, X. Bai, Yuntao Sun, Pengcheng Hu, Yunxian Tian, Yu-Lu Hu","doi":"10.1109/APCAP.2018.8538207","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538207","url":null,"abstract":"The impedance characteristic of folded-waveguide (FW) slow-wave structure (SWS) is studied in this paper. The impedance parameters are determined by the high-frequency parameters, especially the digital electromagnetic field data from a high-frequency structure simulator. After the analysis of the gap impedance of different radii and different angles, the formula of interaction impedance is presented. Finally, the coupling impedance is studied and compared with the interaction impedance. The method can be applied to other complex SWSs that lack of effective analytical methods.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115168426","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}
A novel method is proposed for synthesizing subar-rayed linear array using as few subarrays as possible. According to Compressed Sensing theory, the synthesis herein can be for- mulated as a convex problem with $l_{1}$norm minimization by de- veloping a sparse basis, which benefits from the fact that the element weighting vector is compressible and has a sparse representation. In this way, the corresponding parameters including the number of subarrays, the subarray weights and sizes can be optimized simultaneously by sequential convex optimization. The proposed method is very easy to implement and has good computational efficiency. Numerical experiments are carried out to show the performance of the proposed method.
{"title":"Synthesis of Subarrayed Linear Array via l1-norm Minimization Compressed Sensing Method","authors":"Xiaowen Zhao, Qingshan Yang, Yunhua Zhang, Yunhua Zhang","doi":"10.1109/APCAP.2018.8538246","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538246","url":null,"abstract":"A novel method is proposed for synthesizing subar-rayed linear array using as few subarrays as possible. According to Compressed Sensing theory, the synthesis herein can be for- mulated as a convex problem with $l_{1}$norm minimization by de- veloping a sparse basis, which benefits from the fact that the element weighting vector is compressible and has a sparse representation. In this way, the corresponding parameters including the number of subarrays, the subarray weights and sizes can be optimized simultaneously by sequential convex optimization. The proposed method is very easy to implement and has good computational efficiency. Numerical experiments are carried out to show the performance of the proposed method.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115006419","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538118
Zeqi Zhu, Xu-ling Lin, X. Ji
For improving the performance of CMOS terahertz detectors, parasitic capacitance reduction technique and new working model are proposed for MOSFET devices. We investigate the influence of source parasitic capacitance and drain-to-source current on the performance of CMOS terahertz detectors and analyze the relationship to the voltage responsivity $(mathrm{R}_{V})$ and noise equivalent power (NEP) of detectors. Experiment on the CMOS detectors with a 650GHz antenna shows the maximum improvement of voltage responsivity can attain to 155% by suppressing gate-source parasitic capacitance. The additional drain current Ids can further increase RV while NEP remains unchanged.
{"title":"Performance Enhancement Of Cmos Terahertz Detector","authors":"Zeqi Zhu, Xu-ling Lin, X. Ji","doi":"10.1109/APCAP.2018.8538118","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538118","url":null,"abstract":"For improving the performance of CMOS terahertz detectors, parasitic capacitance reduction technique and new working model are proposed for MOSFET devices. We investigate the influence of source parasitic capacitance and drain-to-source current on the performance of CMOS terahertz detectors and analyze the relationship to the voltage responsivity $(mathrm{R}_{V})$ and noise equivalent power (NEP) of detectors. Experiment on the CMOS detectors with a 650GHz antenna shows the maximum improvement of voltage responsivity can attain to 155% by suppressing gate-source parasitic capacitance. The additional drain current Ids can further increase RV while NEP remains unchanged.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116685252","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538066
Xianmin Zhang, Jiayu Zheng, Shilie Zheng
The orbital angular momentum (OAM) carrying beams associated with helical wavefronts can be viewed as a complete set of eigen-modes for the electromagnetic waves, thus can be used to realize the structured radio wavefront with desired intensity and phase distribution. The structured radio beam maintains the vorticity and orthogonality of the OAM modes and has a directional gain. The unique characteristics provided by structured radio beam may afford a new solution to radar detection.
{"title":"Structured Radio Beam for Radar Detection","authors":"Xianmin Zhang, Jiayu Zheng, Shilie Zheng","doi":"10.1109/APCAP.2018.8538066","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538066","url":null,"abstract":"The orbital angular momentum (OAM) carrying beams associated with helical wavefronts can be viewed as a complete set of eigen-modes for the electromagnetic waves, thus can be used to realize the structured radio wavefront with desired intensity and phase distribution. The structured radio beam maintains the vorticity and orthogonality of the OAM modes and has a directional gain. The unique characteristics provided by structured radio beam may afford a new solution to radar detection.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117046087","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538050
Wei-jun Wu, Zhi-ya Zhang, Yi Mo, Dongdong Wang, Liang Chen
A novel multi-beam antenna based on Butler matrix is designed and realized. In this paper, Butler matrix adopts the substrate integrated waveguide and double layer technology to realize the miniaturization of the network, and the two-layer directional coupler achieves good matching and better flatness in amplitude and phase by using multiple slots, besides, the edge gradient short holes of short slot coupler is adopted to better ensure the equipartition of energy, and inhibit the emergence of TE30. The proposed multi-beam antenna has operation frequency range of 8.0 to 8.5GHz with perfect port matching performance. The maximum gain of the intermediate beam of the antenna reaches 11.2dBi, and the maximum gain of the beam on both sides reaches 10.0dBi with ± 38 ° beam point.
{"title":"A Miniaturized Multi-beam Antenna Based on SIW Butler Matrix","authors":"Wei-jun Wu, Zhi-ya Zhang, Yi Mo, Dongdong Wang, Liang Chen","doi":"10.1109/APCAP.2018.8538050","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538050","url":null,"abstract":"A novel multi-beam antenna based on Butler matrix is designed and realized. In this paper, Butler matrix adopts the substrate integrated waveguide and double layer technology to realize the miniaturization of the network, and the two-layer directional coupler achieves good matching and better flatness in amplitude and phase by using multiple slots, besides, the edge gradient short holes of short slot coupler is adopted to better ensure the equipartition of energy, and inhibit the emergence of TE30. The proposed multi-beam antenna has operation frequency range of 8.0 to 8.5GHz with perfect port matching performance. The maximum gain of the intermediate beam of the antenna reaches 11.2dBi, and the maximum gain of the beam on both sides reaches 10.0dBi with ± 38 ° beam point.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"780 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115329821","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538250
X. Liao, Y. Shao, Yang Wang, Tao Hu
This paper presents a measurement campaign of diffuse scattering pattern from six typical construction materials, including granite, marble, plasterboard, wooden board, rough stone and ceramic tile over a frequency range from 40 GHz to 50 GHz using relatively simple measurement setup. Analysis of the experimental results indicates that diffuse scattering is concentrated around specular reflection direction and has a much greater impact on received power at slant incidence mode than normal incidence mode at 45 GHz. The measured results can be applied in ray-tracing tool to predict mm-Wave propagation for future wireless communication.
{"title":"Experimental Study of Diffuse Scattering from Typical Construction Materials over 40-50GHz","authors":"X. Liao, Y. Shao, Yang Wang, Tao Hu","doi":"10.1109/APCAP.2018.8538250","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538250","url":null,"abstract":"This paper presents a measurement campaign of diffuse scattering pattern from six typical construction materials, including granite, marble, plasterboard, wooden board, rough stone and ceramic tile over a frequency range from 40 GHz to 50 GHz using relatively simple measurement setup. Analysis of the experimental results indicates that diffuse scattering is concentrated around specular reflection direction and has a much greater impact on received power at slant incidence mode than normal incidence mode at 45 GHz. The measured results can be applied in ray-tracing tool to predict mm-Wave propagation for future wireless communication.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115348826","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538156
X. Xie, W. Fang, Ping Chen, Y. Poo, Ruixin Wu
In this work, a broadband and wide-angle band-stop FSS based on dual-layered periodic arrays of fractal square loops was proposed and demonstrated. Equivalent circuit model and full-wave electromagnetic simulation were used to analyze this FSS. The sample of designed FSS with optimized structure parameters for center working frequency about 13GHz was fabricated and measured. The experimental results agree well with the simulated ones. Both of them indicated that the FSS has broad stop bands for both TE and TM polarization under incident angles from 0° to 60°. Specifically, the stop bands under incident angle 60° are over 7.35GHz and 5.91GHz for TE and TM polarization, respectively.
{"title":"A Broadband and Wide-angle Band-stop Frequency Selective Surface (FSS) Based on Dual-layered Fractal Square Loops","authors":"X. Xie, W. Fang, Ping Chen, Y. Poo, Ruixin Wu","doi":"10.1109/APCAP.2018.8538156","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538156","url":null,"abstract":"In this work, a broadband and wide-angle band-stop FSS based on dual-layered periodic arrays of fractal square loops was proposed and demonstrated. Equivalent circuit model and full-wave electromagnetic simulation were used to analyze this FSS. The sample of designed FSS with optimized structure parameters for center working frequency about 13GHz was fabricated and measured. The experimental results agree well with the simulated ones. Both of them indicated that the FSS has broad stop bands for both TE and TM polarization under incident angles from 0° to 60°. Specifically, the stop bands under incident angle 60° are over 7.35GHz and 5.91GHz for TE and TM polarization, respectively.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"201 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115702893","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538130
Huan-Chu Huang, Yijin Wang, Xianjing Jian
In this paper, the influences of ZrO2 ceramic on the fifth generation mobile communications (5G) millimeter-wave (mm-Wave) antenna performance are studied. A 28-GHz 2 × 2 non-stacked patch antenna array and a 28-GHz 2 ×2 stacked patch antenna array are designed on dielectric substrates as the performance baseline. Based on the two types of antenna arrays, various ZrO2 ceramic thicknesses and various gaps between the ZrO2 ceramic and the antenna arrays are simulated to get quick understanding of the ZrO2 ceramic influence on the antenna performance. From the simulated results, it can be found that the ZrO2 ceramic has different influences on different types of antenna arrays. Besides, for both of the two types of antenna arrays, when the thicknesses of ZrO2 ceramic are close or equal to integer multiples of 0.5 guided wavelengths (λg), the antenna performance in the material-loading cases gets close to that in the free space (FS). Also, when the thicknesses of ZrO2 ceramic are close or equal to odd multiples of 0.25 (λg) and the gaps between the ZrO2 ceramic and the antenna array are close or equal to integer multiples 0.5 FS wavelengths (λg), the focusing effects of electromagnetic (EM) beams get significant for both arrays. The findings comply with the EM wave propagation theory and can be applied to radome designs of Terahertz (THz) antenna arrays.
{"title":"Influence Analysis of ZrO2 Ceramic for Cellular Phones on 5G mm-Wave Antenna Performance","authors":"Huan-Chu Huang, Yijin Wang, Xianjing Jian","doi":"10.1109/APCAP.2018.8538130","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538130","url":null,"abstract":"In this paper, the influences of ZrO<inf>2</inf> ceramic on the fifth generation mobile communications (5G) millimeter-wave (mm-Wave) antenna performance are studied. A 28-GHz 2 × 2 non-stacked patch antenna array and a 28-GHz 2 ×2 stacked patch antenna array are designed on dielectric substrates as the performance baseline. Based on the two types of antenna arrays, various ZrO<inf>2</inf> ceramic thicknesses and various gaps between the ZrO<inf>2</inf> ceramic and the antenna arrays are simulated to get quick understanding of the ZrO<inf>2</inf> ceramic influence on the antenna performance. From the simulated results, it can be found that the ZrO<inf>2</inf> ceramic has different influences on different types of antenna arrays. Besides, for both of the two types of antenna arrays, when the thicknesses of ZrO<inf>2</inf> ceramic are close or equal to integer multiples of 0.5 guided wavelengths (λ<inf>g</inf>), the antenna performance in the material-loading cases gets close to that in the free space (FS). Also, when the thicknesses of ZrO<inf>2</inf> ceramic are close or equal to odd multiples of 0.25 (λ<inf>g</inf>) and the gaps between the ZrO<inf>2</inf> ceramic and the antenna array are close or equal to integer multiples 0.5 FS wavelengths (λ<inf>g</inf>), the focusing effects of electromagnetic (EM) beams get significant for both arrays. The findings comply with the EM wave propagation theory and can be applied to radome designs of Terahertz (THz) antenna arrays.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124927538","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538072
Mingming Wang, Dongsheng Li, Ziming Liu, Yijie Gong
Large-scale reflector for compact test range (CTR) is usually obtained by block manufacturing followed by unified assembly alignment. As a consequence, appropriate alignment method is vital for acquiring reflector surfaces with high accuracy. However, periodic oscillation occurs during alignment of reflector panels due to insufficient depth and no isolation of the concrete foundation. To resolve the alignment problem caused by periodic oscillation of the foundation, this paper proposes an iterative self-modified alignment method using a laser tracker, the key to which is how to plan alignment sequence and select appropriate reference points for modifying measurement coordinate system. The method effectively reduces the extra alignment deviation due to periodic oscillation of the foundation, where the loss of accuracy is only 7.9 percent of the theoretical value, while the root mean square of the surface error reduces to 0.041 millimeter. Finally, a microwave amplitude and phase test system based on probe scanning has been established to evaluate electromagnetic performance of the CTR, and the results meet the design requirements.
{"title":"Alignment Method of Reflector Panels for Compact Test Range in Periodic Oscillation Environment","authors":"Mingming Wang, Dongsheng Li, Ziming Liu, Yijie Gong","doi":"10.1109/APCAP.2018.8538072","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538072","url":null,"abstract":"Large-scale reflector for compact test range (CTR) is usually obtained by block manufacturing followed by unified assembly alignment. As a consequence, appropriate alignment method is vital for acquiring reflector surfaces with high accuracy. However, periodic oscillation occurs during alignment of reflector panels due to insufficient depth and no isolation of the concrete foundation. To resolve the alignment problem caused by periodic oscillation of the foundation, this paper proposes an iterative self-modified alignment method using a laser tracker, the key to which is how to plan alignment sequence and select appropriate reference points for modifying measurement coordinate system. The method effectively reduces the extra alignment deviation due to periodic oscillation of the foundation, where the loss of accuracy is only 7.9 percent of the theoretical value, while the root mean square of the surface error reduces to 0.041 millimeter. Finally, a microwave amplitude and phase test system based on probe scanning has been established to evaluate electromagnetic performance of the CTR, and the results meet the design requirements.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125013506","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 : 2018-08-01DOI: 10.1109/APCAP.2018.8538291
Bi Xiaojun
This paper presents three silicon-based 100 GHz radiometer chips for passive imaging, including a total power radiometer and two types of Dicke radiometers. The total power radiometer consists of a high gain low noise amplifier (LNA) and a high-responsivity detector. Besides the LNA and the detector, the two Dicke radiometers include an additional passive SPDT switch and a proposed SPDT amplifier respectively. The above radiometers are fabricated in two different $0.13 mu mathrm {m}$ SiGe BiCMOS technologies, which feature comparable $f_{mathrm {T}}/ f_{max}$. The measurement results demonstrate a typical LNA gain of 35–45 dB utilizing 4 cascode stages, a typical responsivity of 27.2 kV/W, a typical noise equivalent power of around $2.5,mathrm{pW/surd Hz}$ at 91 GHz. Utilizing the SPDT amplifier, the Dicke radiometer demonstrates a switching loss as small as 0.93 @ 91 GHz, which leads to a noise equivalent temperature difference (NETD) as small as 0.21 K@30 ms.
{"title":"Silicon-Based sub-THz Radiometers for Passive Imaging","authors":"Bi Xiaojun","doi":"10.1109/APCAP.2018.8538291","DOIUrl":"https://doi.org/10.1109/APCAP.2018.8538291","url":null,"abstract":"This paper presents three silicon-based 100 GHz radiometer chips for passive imaging, including a total power radiometer and two types of Dicke radiometers. The total power radiometer consists of a high gain low noise amplifier (LNA) and a high-responsivity detector. Besides the LNA and the detector, the two Dicke radiometers include an additional passive SPDT switch and a proposed SPDT amplifier respectively. The above radiometers are fabricated in two different $0.13 mu mathrm {m}$ SiGe BiCMOS technologies, which feature comparable $f_{mathrm {T}}/ f_{max}$. The measurement results demonstrate a typical LNA gain of 35–45 dB utilizing 4 cascode stages, a typical responsivity of 27.2 kV/W, a typical noise equivalent power of around $2.5,mathrm{pW/surd Hz}$ at 91 GHz. Utilizing the SPDT amplifier, the Dicke radiometer demonstrates a switching loss as small as 0.93 @ 91 GHz, which leads to a noise equivalent temperature difference (NETD) as small as 0.21 K@30 ms.","PeriodicalId":198124,"journal":{"name":"2018 IEEE Asia-Pacific Conference on Antennas and Propagation (APCAP)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125513697","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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