Pub Date : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704704
Connor B. Jenkins, Vigyanshu Mishra, A. Kiourti
Detecting and diagnosing joint effusion is a costly and often invasive process. Our previous work introduced a seamless wearable system consisting of transmit and receive loops that was able to detect changes in synovial fluid build-up via transmission coefficient $boldsymbol{(mathrm{S}_{21})}$ measurements. The system relied on magnitude and phase measurements conducted each at different frequencies. This work simplifies the previous design by enabling monitoring of both magnitude and phase at a single frequency. Another improvement is the elimination of any lumped elements attached to the loops to ease the wearable implementation. Our studies provide an optimal design at 1485.2 MHz that is robust to frequency fluctuations within a bandwidth of 30 MHz. Key performance metrics are identified and compared for magnitude-Iphase-only designs vs. the proposed combined approach.
{"title":"Wearables for Joint Effusion Detection: An Analysis for Magnitude-/Phase-Only vs. Combined Readings","authors":"Connor B. Jenkins, Vigyanshu Mishra, A. Kiourti","doi":"10.1109/APS/URSI47566.2021.9704704","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704704","url":null,"abstract":"Detecting and diagnosing joint effusion is a costly and often invasive process. Our previous work introduced a seamless wearable system consisting of transmit and receive loops that was able to detect changes in synovial fluid build-up via transmission coefficient $boldsymbol{(mathrm{S}_{21})}$ measurements. The system relied on magnitude and phase measurements conducted each at different frequencies. This work simplifies the previous design by enabling monitoring of both magnitude and phase at a single frequency. Another improvement is the elimination of any lumped elements attached to the loops to ease the wearable implementation. Our studies provide an optimal design at 1485.2 MHz that is robust to frequency fluctuations within a bandwidth of 30 MHz. Key performance metrics are identified and compared for magnitude-Iphase-only designs vs. the proposed combined approach.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"16 1","pages":"137-138"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81099618","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704534
Yihang Tu, E. Li, Lin Qin, Yang Qiu
This paper presents an open resonator at 35 GHz for plasma diagnosis. The resonator combines the closed cavity with the antenna. According to the hole coupling theory, the resonant mode in the cavity can be converted into the propagation mode of the antenna. After the plasma is loaded, the reflection coefficient of the antenna will be affected, thereby disturbing the resonance mode in the cavity. In view of the phenomenon, a measurement for the plasma electron density ($N_{e}$) based on resonance theory will be realized.
{"title":"Research on Open Resonator at 35 GHz for Plasma Diagnosis","authors":"Yihang Tu, E. Li, Lin Qin, Yang Qiu","doi":"10.1109/APS/URSI47566.2021.9704534","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704534","url":null,"abstract":"This paper presents an open resonator at 35 GHz for plasma diagnosis. The resonator combines the closed cavity with the antenna. According to the hole coupling theory, the resonant mode in the cavity can be converted into the propagation mode of the antenna. After the plasma is loaded, the reflection coefficient of the antenna will be affected, thereby disturbing the resonance mode in the cavity. In view of the phenomenon, a measurement for the plasma electron density ($N_{e}$) based on resonance theory will be realized.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"42 1","pages":"843-844"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78560065","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9703938
Nagma Vohra, M. El-Shenawee, Keith Bailey
In this work, we demonstrate the use of the reflection mode terahertz imaging technique for the margin assessment of breast cancer tumors developed in Sprague Dawley rats. The tumors in the rats were produced by injecting N-ethyl-N-nitrosourea chemical into their mammary pad. The pathology assessment results demonstrated the presence of fibro-fatty tissue adjacent to cancer in the excised tumor. THz imaging results show significant differentiation between these tissue types. Thus, the proposed rat breast tumor model demonstrated a potential to obtain cancerous tissues closely mimicking human breast tumors.
{"title":"Terahertz Imaging of ENU Injected Sprague Dawley Rat Breast Cancer Tumors","authors":"Nagma Vohra, M. El-Shenawee, Keith Bailey","doi":"10.1109/APS/URSI47566.2021.9703938","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9703938","url":null,"abstract":"In this work, we demonstrate the use of the reflection mode terahertz imaging technique for the margin assessment of breast cancer tumors developed in Sprague Dawley rats. The tumors in the rats were produced by injecting N-ethyl-N-nitrosourea chemical into their mammary pad. The pathology assessment results demonstrated the presence of fibro-fatty tissue adjacent to cancer in the excised tumor. THz imaging results show significant differentiation between these tissue types. Thus, the proposed rat breast tumor model demonstrated a potential to obtain cancerous tissues closely mimicking human breast tumors.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"41 1","pages":"585-586"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76253370","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704495
Katarina Vodvarka, M. Vucic, Goran Molnar
The paper presents pencil beams which are optimum in $L_{1}$-sense. A convex optimization program for their design is provided. The presented pencil beams exhibit maximum sidelobe level of approximately −21 dB for all array sizes and the lobes that monotonically decrease as the azimuth angle increases. The dynamic range ratio of excitation coefficients increases linearly with the number of elements and generally takes low values.
{"title":"Synthesis of Pencil Beams Optimum in L1-Sense","authors":"Katarina Vodvarka, M. Vucic, Goran Molnar","doi":"10.1109/APS/URSI47566.2021.9704495","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704495","url":null,"abstract":"The paper presents pencil beams which are optimum in $L_{1}$-sense. A convex optimization program for their design is provided. The presented pencil beams exhibit maximum sidelobe level of approximately −21 dB for all array sizes and the lobes that monotonically decrease as the azimuth angle increases. The dynamic range ratio of excitation coefficients increases linearly with the number of elements and generally takes low values.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"54 7 1","pages":"307-308"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78320047","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9703934
Zi-Liang Li, Z. Xing, Jian-ying Li
A novel T-shaped defected ground structure (DGS) is presented to reduce the mutual coupling between dual feed points circularly polarization microstrip antennas. In this paper, the mutual coupling between the same polarization ports decreases by 12.8dB and 7dB in parallel and series arrangement, respectively. The gain and radiation efficiency are increased from 7.2dB to 7.58dB and from 94.6% to 95.6%, respectively. The axial ratio has also been optimized from 1.74dB to 0.36dB.
{"title":"A T-shaped defected ground structure for decoupling circularly polarization microstrip antenna array","authors":"Zi-Liang Li, Z. Xing, Jian-ying Li","doi":"10.1109/APS/URSI47566.2021.9703934","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9703934","url":null,"abstract":"A novel T-shaped defected ground structure (DGS) is presented to reduce the mutual coupling between dual feed points circularly polarization microstrip antennas. In this paper, the mutual coupling between the same polarization ports decreases by 12.8dB and 7dB in parallel and series arrangement, respectively. The gain and radiation efficiency are increased from 7.2dB to 7.58dB and from 94.6% to 95.6%, respectively. The axial ratio has also been optimized from 1.74dB to 0.36dB.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"107 1","pages":"933-934"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77426402","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704132
Abdel-Kareem Moadi, Marvin Joshi, O. Kilic, A. Fathy
Impulse Radar Ultra-Wideband (IR-UWB) radar has a high range resolution due to its available wide band; thus, it can precisely localize more than one target along its range. However, it has been criticized for its inefficiency in terms of complexity and cost when used for vital sign detection. Here, we utilize a low-cost novel IR radar chip for non-contact vital-sign sensing that could be used for either single or multiple subjects' vital sign detection. The approach uses a commercial low cost 8 GHz IR-UWB Doppler radar chip with a combination of arctangent demodulation (AD) and Short-Time State-Space Method (ST-SSM) algorithms to successfully and accurately extract the phase variation signals to estimate the respiration rate and heart rate of a subject. Precise range information of the scene is utilized to clearly discern multiple targets, making it possible to detect vital signs multiple targets within the few cm range resolution. The proposed method can accurately operate in real time and it is feasible to be used for patients' health tracking, elderly care, emergency surveillance, and infant sleep apnea monitoring as well.
{"title":"Low Cost IR-UWB Radar for Multisubject Non-Contact Vital Sign Detection","authors":"Abdel-Kareem Moadi, Marvin Joshi, O. Kilic, A. Fathy","doi":"10.1109/APS/URSI47566.2021.9704132","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704132","url":null,"abstract":"Impulse Radar Ultra-Wideband (IR-UWB) radar has a high range resolution due to its available wide band; thus, it can precisely localize more than one target along its range. However, it has been criticized for its inefficiency in terms of complexity and cost when used for vital sign detection. Here, we utilize a low-cost novel IR radar chip for non-contact vital-sign sensing that could be used for either single or multiple subjects' vital sign detection. The approach uses a commercial low cost 8 GHz IR-UWB Doppler radar chip with a combination of arctangent demodulation (AD) and Short-Time State-Space Method (ST-SSM) algorithms to successfully and accurately extract the phase variation signals to estimate the respiration rate and heart rate of a subject. Precise range information of the scene is utilized to clearly discern multiple targets, making it possible to detect vital signs multiple targets within the few cm range resolution. The proposed method can accurately operate in real time and it is feasible to be used for patients' health tracking, elderly care, emergency surveillance, and infant sleep apnea monitoring as well.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"60 1","pages":"135-136"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77772489","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704515
B. Dawson
The use of short vertical monopoles with imperfect ground radial systems has become more common at medium and low frequencies as property area for such systems has become more valuable. A simple and straightforward method for evaluation of the efficiency effects of such restricted size systems is described.
{"title":"Technique for Efficiency Evaluation of Vertical Monopoles over Imperfect Earth","authors":"B. Dawson","doi":"10.1109/APS/URSI47566.2021.9704515","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704515","url":null,"abstract":"The use of short vertical monopoles with imperfect ground radial systems has become more common at medium and low frequencies as property area for such systems has become more valuable. A simple and straightforward method for evaluation of the efficiency effects of such restricted size systems is described.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"50 1","pages":"667-668"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77790632","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704766
R. Hussain, A. Raza, Muhammad Umar Khan, M. Abou-Khousa, M. Sharawi
An integrated multi-standard slot-based multiple-input multiple-output (MIMO) antenna is proposed in this work. The design is suitable for 5G new radio access networks (n-RNA) applications. It comprises of 2-elements frequency reconfigurable (FR) and 2-elements ultra-wide-band (UWB) MIMO antenna developed on the same substrate. The dual-band FR antenna covers the frequency bands from 1.36-3.19 and 3.6-5.6 GHz while UWB operates over a frequency bands from 1.27-4.415 GHz. Continuous frequency sweep is achieved over both bands using a single varactor diode. The multi-functional antenna design that operates independently as a FR MIMO antenna, an UWB MIMO antenna as well as an integrated front-end solution covered several standard. It is a compact antenna design with total substrate dimensions of $boldsymbol{120times 60}mm^{2}$.
{"title":"Integrated Multi-Standard MIMO Antennas for 5G n-RNA Applications","authors":"R. Hussain, A. Raza, Muhammad Umar Khan, M. Abou-Khousa, M. Sharawi","doi":"10.1109/APS/URSI47566.2021.9704766","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704766","url":null,"abstract":"An integrated multi-standard slot-based multiple-input multiple-output (MIMO) antenna is proposed in this work. The design is suitable for 5G new radio access networks (n-RNA) applications. It comprises of 2-elements frequency reconfigurable (FR) and 2-elements ultra-wide-band (UWB) MIMO antenna developed on the same substrate. The dual-band FR antenna covers the frequency bands from 1.36-3.19 and 3.6-5.6 GHz while UWB operates over a frequency bands from 1.27-4.415 GHz. Continuous frequency sweep is achieved over both bands using a single varactor diode. The multi-functional antenna design that operates independently as a FR MIMO antenna, an UWB MIMO antenna as well as an integrated front-end solution covered several standard. It is a compact antenna design with total substrate dimensions of $boldsymbol{120times 60}mm^{2}$.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"67 4 1","pages":"761-762"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77803725","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704500
T. Khan, A. Wong
This research presents a theoretical implementation of a wideband open resonator antenna (ORA) using an impedance surface acting as a ground plane. The impedance surface realization is based on the Bessel filter design methodology. It will be shown that the proposed methodology provides an alternative approach to design ORA without using complicated structures. Our proposed ORA design shows significant improvement in the 3dB gain bandwidth - 24.7 % - with a peak gain of 16.9 dBi. Simulated results are shown and compared with the ORA design with discretized metallic and flat ground.
{"title":"Wideband High-Gain Open Resonator Antenna Using a Flat Impedance Surface","authors":"T. Khan, A. Wong","doi":"10.1109/APS/URSI47566.2021.9704500","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704500","url":null,"abstract":"This research presents a theoretical implementation of a wideband open resonator antenna (ORA) using an impedance surface acting as a ground plane. The impedance surface realization is based on the Bessel filter design methodology. It will be shown that the proposed methodology provides an alternative approach to design ORA without using complicated structures. Our proposed ORA design shows significant improvement in the 3dB gain bandwidth - 24.7 % - with a peak gain of 16.9 dBi. Simulated results are shown and compared with the ORA design with discretized metallic and flat ground.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"74 1","pages":"1966-1967"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72805348","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 : 2021-12-04DOI: 10.1109/APS/URSI47566.2021.9704340
Wenyu Zhao, Xiuping Li, Zihang Qi
In this paper, a dual circularly polarized antenna array with a compact feeding network is proposed for millimeter-wave applications. The antenna element consists of four sequentially rotated patches fed by a high-order mode cavity to reduce the dielectric loss in the feeding network. Right-hand circular polarization(RHCP) and left-hand circular polarization(LHCP) are achieved by adopting a coupler and a phase shifter between the two input ports. The measured and simulated results agree well, showing its good performance of high gain and wide impedance bandwidth.
{"title":"A Dual Circularly Polarized Antenna Array With Compact Feeding Network","authors":"Wenyu Zhao, Xiuping Li, Zihang Qi","doi":"10.1109/APS/URSI47566.2021.9704340","DOIUrl":"https://doi.org/10.1109/APS/URSI47566.2021.9704340","url":null,"abstract":"In this paper, a dual circularly polarized antenna array with a compact feeding network is proposed for millimeter-wave applications. The antenna element consists of four sequentially rotated patches fed by a high-order mode cavity to reduce the dielectric loss in the feeding network. Right-hand circular polarization(RHCP) and left-hand circular polarization(LHCP) are achieved by adopting a coupler and a phase shifter between the two input ports. The measured and simulated results agree well, showing its good performance of high gain and wide impedance bandwidth.","PeriodicalId":6801,"journal":{"name":"2021 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting (APS/URSI)","volume":"23 1","pages":"1565-1566"},"PeriodicalIF":0.0,"publicationDate":"2021-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79873918","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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