Pub Date : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329942
Xiaobao Deng, Zijun Wu, N. Buris
This paper describes a drone assisted method to perform simplified 3D reconstruction of real-world buildings for Ray Tracing (RT) and wireless system analyses. The efficiency of the method is assessed via the accuracy in predicting the RF coverage and capacity of simple antenna wireless systems in the resultant propagation environment.
{"title":"3D Propagation Environment Reconstruction for RF Coverage and Capacity","authors":"Xiaobao Deng, Zijun Wu, N. Buris","doi":"10.1109/IEEECONF35879.2020.9329942","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329942","url":null,"abstract":"This paper describes a drone assisted method to perform simplified 3D reconstruction of real-world buildings for Ray Tracing (RT) and wireless system analyses. The efficiency of the method is assessed via the accuracy in predicting the RF coverage and capacity of simple antenna wireless systems in the resultant propagation environment.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128567174","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329773
J. Budhu, A. Grbic, N. Pfiester, C. Ball, K. Choi, S. Krishna
A Dielectric Resonator Antenna Coupled Infrared Antimonide Photodetector (DRACAD) is presented. The large capture area of the DRA feeds incident radiation to the subwavelength dimension detector. The reduced dimension of the detector reduces the Noise Equivalent Power (NEP). The large capture area of the DRA increases the captured signal. The combination leads to high Signal-to-Noise Ratios (SNR). The DRACAD is designed using a Genetic Algorithm Optimization to obtain dimensions which maximize the absorbed infrared radiation with the smallest possible detector. The plasmonic metals are modeled as effective lossy sheet impedances. Absorption spectrum simulations between $8-12mu m$ wavelengths show the DRACAD absorbs nearly 73% of the incident light at $9mu m$ after all metal losses are accounted for.
{"title":"Dielectric Resonator Antenna Coupled Infrared Antimonide Photodetectors","authors":"J. Budhu, A. Grbic, N. Pfiester, C. Ball, K. Choi, S. Krishna","doi":"10.1109/IEEECONF35879.2020.9329773","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329773","url":null,"abstract":"A Dielectric Resonator Antenna Coupled Infrared Antimonide Photodetector (DRACAD) is presented. The large capture area of the DRA feeds incident radiation to the subwavelength dimension detector. The reduced dimension of the detector reduces the Noise Equivalent Power (NEP). The large capture area of the DRA increases the captured signal. The combination leads to high Signal-to-Noise Ratios (SNR). The DRACAD is designed using a Genetic Algorithm Optimization to obtain dimensions which maximize the absorbed infrared radiation with the smallest possible detector. The plasmonic metals are modeled as effective lossy sheet impedances. Absorption spectrum simulations between $8-12mu m$ wavelengths show the DRACAD absorbs nearly 73% of the incident light at $9mu m$ after all metal losses are accounted for.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124634738","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330070
Anup Karki, B. Dunne, J. Ward, Paul W. Keenlance
Pseudo-Doppler (PD) is a powerful technique for Angle of Arrival (AoA) estimation for single-channel systems. In the application of collared animal tracking considered within, the VHF transmitting beacon is enabled for a very low duty cycle such as 2 percent. This low duty cycle presents several unique design challenges that are addressed in the revised PD algorithm. PD is then implemented using the LimeMini-SDR for a four-element antenna array. The resulting system delivers accurate AoA estimates for duty cycles approaching 1 percent.
{"title":"SDR-based Psuedo-Doppler AoA Estimation for Low Duty Cycle Transmitters","authors":"Anup Karki, B. Dunne, J. Ward, Paul W. Keenlance","doi":"10.1109/IEEECONF35879.2020.9330070","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330070","url":null,"abstract":"Pseudo-Doppler (PD) is a powerful technique for Angle of Arrival (AoA) estimation for single-channel systems. In the application of collared animal tracking considered within, the VHF transmitting beacon is enabled for a very low duty cycle such as 2 percent. This low duty cycle presents several unique design challenges that are addressed in the revised PD algorithm. PD is then implemented using the LimeMini-SDR for a four-element antenna array. The resulting system delivers accurate AoA estimates for duty cycles approaching 1 percent.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124766636","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330069
Lijia Chen, Qi Zhang, Hao Wang, Shufeng Zhang, Shengchang Lan
In this paper, a MIMO antenna array for 5G mobile terminal is proposed. The antenna bandwidth was broadened by opening either L-shaped slot or square slot in the ground plate. The covering bandwidth of the antenna array is 3.3GHz-3.6GHz and 4.8GHz-5GHz. CST software was used to simulate and optimize the parameters of the designed antenna array. The prototype antenna was manufactured and tested. The performance of the simulation shows that the proposed antenna array can be used in 5G mobile terminals.
{"title":"A Ten-port Multi-band 5G MIMO Antenna Array","authors":"Lijia Chen, Qi Zhang, Hao Wang, Shufeng Zhang, Shengchang Lan","doi":"10.1109/IEEECONF35879.2020.9330069","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330069","url":null,"abstract":"In this paper, a MIMO antenna array for 5G mobile terminal is proposed. The antenna bandwidth was broadened by opening either L-shaped slot or square slot in the ground plate. The covering bandwidth of the antenna array is 3.3GHz-3.6GHz and 4.8GHz-5GHz. CST software was used to simulate and optimize the parameters of the designed antenna array. The prototype antenna was manufactured and tested. The performance of the simulation shows that the proposed antenna array can be used in 5G mobile terminals.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129483572","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329792
Songyi Yen, D. Filipović
Four-arm spirals are proposed for use in an active Van Atta array configuration with co-polarized simultaneous transmit and receive in mind. Retrodirective behavior is observed out to 60° at the analysis frequency with active circuit gain possible up to a limit, related to the transmit-receive coupling. Additionally, retrodirection generally increases at a faster rate than specular reflection as circuit gain is increased.
{"title":"Co-polarized Retrodirective Array with Active Enhancement","authors":"Songyi Yen, D. Filipović","doi":"10.1109/IEEECONF35879.2020.9329792","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329792","url":null,"abstract":"Four-arm spirals are proposed for use in an active Van Atta array configuration with co-polarized simultaneous transmit and receive in mind. Retrodirective behavior is observed out to 60° at the analysis frequency with active circuit gain possible up to a limit, related to the transmit-receive coupling. Additionally, retrodirection generally increases at a faster rate than specular reflection as circuit gain is increased.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129536910","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330288
T. Guo, C. Argyropoulos
This work reports a novel asymmetric bifacial graphene metasurface design exhibiting broadband coherent perfect absorption (CPA) at low terahertz (THz) frequencies. Nonlinear CPA performance without resorting to optical nonlinearities, as well as amplification are demonstrated based on wave interference phenomena taking place in this subwavelength structure. The proposed design is composed of two graphene square patch arrays with different dimensions stacked over an ultrathin dielectric substrate. Asymmetric reflection in a broad frequency range is obtained that leads to the presented broadband and nonlinear CPA response and amplifying performance. The proposed ultrathin broadband CPA device is expected to be an important component to several new on-chip THz communication devices, such as sensors, coherent detectors, all-optical modulators, and small-signal amplifiers.
{"title":"Nonlinear and Amplification Response with Asymmetric Graphene-based Coherent Perfect Absorbers","authors":"T. Guo, C. Argyropoulos","doi":"10.1109/IEEECONF35879.2020.9330288","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330288","url":null,"abstract":"This work reports a novel asymmetric bifacial graphene metasurface design exhibiting broadband coherent perfect absorption (CPA) at low terahertz (THz) frequencies. Nonlinear CPA performance without resorting to optical nonlinearities, as well as amplification are demonstrated based on wave interference phenomena taking place in this subwavelength structure. The proposed design is composed of two graphene square patch arrays with different dimensions stacked over an ultrathin dielectric substrate. Asymmetric reflection in a broad frequency range is obtained that leads to the presented broadband and nonlinear CPA response and amplifying performance. The proposed ultrathin broadband CPA device is expected to be an important component to several new on-chip THz communication devices, such as sensors, coherent detectors, all-optical modulators, and small-signal amplifiers.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129656118","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329756
Hong Sheng Lin, Y. Cheng
A novel low-profile distributed conformal phased array antenna (DCPAA) with hemispherical beam coverage is presented in this paper. All conventional spherical phased array antennas (SPAAs) have large beam coverage but high profile because of their spherical carrier. In this design, the proposed low-profile DCPAA is reconfigured by readjusting positions and directions of some antenna elements on the conventional SPAA symmetrically. Elements in distributed areas of the DCPAA cooperate to realize the distributed virtual aperture synthesis. In this case, the low-profile DCPAA can roughly keep the original effective radiation aperture of the SPAA and their performances are almost the same. Thus, the profile of the proposed DCPAA is 44.45% lower than that of the SPAA. In addition, the gain flatness of the low-profile DCPAA is as same as that of the SPAA (1.3 dB) within hemispherical beam coverage. Moreover, the DCPAA has only 0.5 dB gain loss within the scanning range compared with the SPAA.
{"title":"A Low-Profile Distributed Conformal Phased Array Antenna with Hemispherical Beam Coverage","authors":"Hong Sheng Lin, Y. Cheng","doi":"10.1109/IEEECONF35879.2020.9329756","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329756","url":null,"abstract":"A novel low-profile distributed conformal phased array antenna (DCPAA) with hemispherical beam coverage is presented in this paper. All conventional spherical phased array antennas (SPAAs) have large beam coverage but high profile because of their spherical carrier. In this design, the proposed low-profile DCPAA is reconfigured by readjusting positions and directions of some antenna elements on the conventional SPAA symmetrically. Elements in distributed areas of the DCPAA cooperate to realize the distributed virtual aperture synthesis. In this case, the low-profile DCPAA can roughly keep the original effective radiation aperture of the SPAA and their performances are almost the same. Thus, the profile of the proposed DCPAA is 44.45% lower than that of the SPAA. In addition, the gain flatness of the low-profile DCPAA is as same as that of the SPAA (1.3 dB) within hemispherical beam coverage. Moreover, the DCPAA has only 0.5 dB gain loss within the scanning range compared with the SPAA.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130542064","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9330259
Yafeng Li, E. Li, Jianyu Wang
In this paper, an optical signal microwave measurement technique based on the resonance performance of a helical antenna is proposed. The helical antenna loaded with a cadmium sulfide (CdS) photoresistor is used as the core detection sensor. When the CdS photoresistor is irradiated, the resistance loaded on the helical antenna changes, which causes the microwave resonance performance to change accordingly. Therefore, according to the measurement of the microwave resonance, the optical signal can be successfully detected. In this experiment, the light source is a power tunable signal source with a working wavelength of 480nm. The minimum detection power is $mathbf{2.5}times mathbf{10}^{-mathbf{9}}mathbf{W}$, and the photosensitivity is $mathbf{R}=mathbf{0.034dB}/mathbf{nW}$.
{"title":"Microwave measurement technology of optical signal based on the helical antenna","authors":"Yafeng Li, E. Li, Jianyu Wang","doi":"10.1109/IEEECONF35879.2020.9330259","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9330259","url":null,"abstract":"In this paper, an optical signal microwave measurement technique based on the resonance performance of a helical antenna is proposed. The helical antenna loaded with a cadmium sulfide (CdS) photoresistor is used as the core detection sensor. When the CdS photoresistor is irradiated, the resistance loaded on the helical antenna changes, which causes the microwave resonance performance to change accordingly. Therefore, according to the measurement of the microwave resonance, the optical signal can be successfully detected. In this experiment, the light source is a power tunable signal source with a working wavelength of 480nm. The minimum detection power is $mathbf{2.5}times mathbf{10}^{-mathbf{9}}mathbf{W}$, and the photosensitivity is $mathbf{R}=mathbf{0.034dB}/mathbf{nW}$.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126707498","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329998
Bi-Hui Xu, Yanwen Zhao, Li Gu
A simple and compact broadband circularly polarized (CP) filtering planar monopole antenna for C-band applications is presented. A printed falcate-shaped monopole with a modified ground plane is applied to realize broadband impedance matching and circular polarization radiation. By symmetrically etching a pair of rectangular complementary split-ring resonators (CSRRs) on the ground plane directly beneath the feedline, good filtering performance in the upper stopband is achieved and CP radiation towards high frequency is enhanced. The proposed antenna provides −10 dB impedance bandwidth of 72% ranging from 3.8 to 8.1 GHz, and the 3 dB axial ratio (AR) bandwidth of 63% ranging from 4.1-7.9 GHz.
{"title":"Broadband Circularly Polarized Filtering Monopole Antenna for C-Band Applications","authors":"Bi-Hui Xu, Yanwen Zhao, Li Gu","doi":"10.1109/IEEECONF35879.2020.9329998","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329998","url":null,"abstract":"A simple and compact broadband circularly polarized (CP) filtering planar monopole antenna for C-band applications is presented. A printed falcate-shaped monopole with a modified ground plane is applied to realize broadband impedance matching and circular polarization radiation. By symmetrically etching a pair of rectangular complementary split-ring resonators (CSRRs) on the ground plane directly beneath the feedline, good filtering performance in the upper stopband is achieved and CP radiation towards high frequency is enhanced. The proposed antenna provides −10 dB impedance bandwidth of 72% ranging from 3.8 to 8.1 GHz, and the 3 dB axial ratio (AR) bandwidth of 63% ranging from 4.1-7.9 GHz.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130654631","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 : 2020-07-05DOI: 10.1109/IEEECONF35879.2020.9329926
Haider Ali, M. Afzal, K. Esselle, R. Hashmi
This paper investigates a stacked-ring based unit cell design for near-field phase-shifting metasurfaces developed for beam-steering applications. The unit cell has two dielectric layers sandwiched between three thin patterns of conductive material. Each of the three conductive patterns has a circular ring of varying sizes to produce the required spatial phase variation across the metasurface. To validate the performance of the unit cell, a metasurface was designed to tilt the beam of a $4times 4$ microstrip array. The numerical simulations predict that the array beam can be tilted by an angle of 28.8° without severe degradation, verifying the unit cell phase-shifting characteristics.
{"title":"Investigating Stacked-Ring Based Cells for Phase Shifting Surfaces","authors":"Haider Ali, M. Afzal, K. Esselle, R. Hashmi","doi":"10.1109/IEEECONF35879.2020.9329926","DOIUrl":"https://doi.org/10.1109/IEEECONF35879.2020.9329926","url":null,"abstract":"This paper investigates a stacked-ring based unit cell design for near-field phase-shifting metasurfaces developed for beam-steering applications. The unit cell has two dielectric layers sandwiched between three thin patterns of conductive material. Each of the three conductive patterns has a circular ring of varying sizes to produce the required spatial phase variation across the metasurface. To validate the performance of the unit cell, a metasurface was designed to tilt the beam of a $4times 4$ microstrip array. The numerical simulations predict that the array beam can be tilted by an angle of 28.8° without severe degradation, verifying the unit cell phase-shifting characteristics.","PeriodicalId":135770,"journal":{"name":"2020 IEEE International Symposium on Antennas and Propagation and North American Radio Science Meeting","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123399355","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：