Pub Date : 2020-07-05DOI: 10.23919/USNC/URSI49741.2020.9321690
Atik Mahabub, Syed M. Sifat, A. Kishk
Three configurations of substrate integrated printed log-periodic dipole array (PLPDA) antenna are presented. The antenna is designed at the ka-band for 5G applications. The antennas provide a peak gain of 12-14.5dBi with a bandwidth of about 59% (21-37GHz). First configuration, LPDA antenna backed by a flat ground, is proposed to reduce the back radiation and to improve the gain. Second configuration, directors are added to improve the gain (about 2.5 dBi) and reduce the back lobe further, but the return loss is increased. In the third configuration, the substrate is perforated to decrease the return loss. All of these proposed configurations of the substrate integrated printed LPDA antenna maintain fantastic front to back lobe ratio with low cross-polarization for the entire frequency 5G band.
{"title":"High Gain Wideband Log-Periodic Antenna with Directors and Perforation for 5G Application","authors":"Atik Mahabub, Syed M. Sifat, A. Kishk","doi":"10.23919/USNC/URSI49741.2020.9321690","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321690","url":null,"abstract":"Three configurations of substrate integrated printed log-periodic dipole array (PLPDA) antenna are presented. The antenna is designed at the ka-band for 5G applications. The antennas provide a peak gain of 12-14.5dBi with a bandwidth of about 59% (21-37GHz). First configuration, LPDA antenna backed by a flat ground, is proposed to reduce the back radiation and to improve the gain. Second configuration, directors are added to improve the gain (about 2.5 dBi) and reduce the back lobe further, but the return loss is increased. In the third configuration, the substrate is perforated to decrease the return loss. All of these proposed configurations of the substrate integrated printed LPDA antenna maintain fantastic front to back lobe ratio with low cross-polarization for the entire frequency 5G band.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"11255 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":"116748879","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: 10.23919/USNC/URSI49741.2020.9321685
Kalyankar Shravan Kumar, Yee Hui Lee, Y. S. Meng
Recently, a spectrum survey was performed at a Mass Rapid Transit (MRT) station located in Singapore for the study of spectrum utilization in the 2.4 GHz ISM frequency band. The measurement results indicate that the 2.4 GHz ISM band is highly crowded by the WLAN signals and the CCTV signals in this MRT environment. The presence of WLAN signals and CCTV signals increases the potential of interference to the Communications-Based Train Control (CBTC) signals and therefore creates the risk of frequent failures in train control.An occupancy analysis is then carried out to study the severity of interference from those Non-CBTC signals to the CBTC signals. The results present that maximum occupancy in the 2.4 GHz ISM band could be up to 58.76 %, which is significant enough to introduce spectral congestion for the CBTC system.
{"title":"Spectrum Survey in 2.4 GHz ISM Band for a MRT Station Located in Singapore","authors":"Kalyankar Shravan Kumar, Yee Hui Lee, Y. S. Meng","doi":"10.23919/USNC/URSI49741.2020.9321685","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321685","url":null,"abstract":"Recently, a spectrum survey was performed at a Mass Rapid Transit (MRT) station located in Singapore for the study of spectrum utilization in the 2.4 GHz ISM frequency band. The measurement results indicate that the 2.4 GHz ISM band is highly crowded by the WLAN signals and the CCTV signals in this MRT environment. The presence of WLAN signals and CCTV signals increases the potential of interference to the Communications-Based Train Control (CBTC) signals and therefore creates the risk of frequent failures in train control.An occupancy analysis is then carried out to study the severity of interference from those Non-CBTC signals to the CBTC signals. The results present that maximum occupancy in the 2.4 GHz ISM band could be up to 58.76 %, which is significant enough to introduce spectral congestion for the CBTC system.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"30 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":"121121445","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: 10.23919/USNC/URSI49741.2020.9321597
Ning Zhang, Z. Xue, Xiao-fei Wang, Shi-gang Zhou
This paper presents the design of a circular polarized antenna array in X-band with high efficiency. The antenna array consists of a linear polarized antenna array and a circular-polarization polarizer. Full metal structure and corporate feeding network are adopted in the linear polarized antenna array to achieve high efficiency and wide band properties. The polarizer is metal strips printed on a one-layer substrate in periodic layout. An antenna array with 4 × 4 radiation elements and 12×12 polarizer elements is designed. The simulated results show that the antenna array can cover the bandwidth from 8.3 GHz to 9.2 GHz with VSWR<2.0 and the axial ratio below 3.0 dB. The realized gain varies from 17.8 dB to 18.0 dB over the frequency band. The taper feeding is used here.
{"title":"Design of High Efficiency Circular Polarized Antenna Array","authors":"Ning Zhang, Z. Xue, Xiao-fei Wang, Shi-gang Zhou","doi":"10.23919/USNC/URSI49741.2020.9321597","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321597","url":null,"abstract":"This paper presents the design of a circular polarized antenna array in X-band with high efficiency. The antenna array consists of a linear polarized antenna array and a circular-polarization polarizer. Full metal structure and corporate feeding network are adopted in the linear polarized antenna array to achieve high efficiency and wide band properties. The polarizer is metal strips printed on a one-layer substrate in periodic layout. An antenna array with 4 × 4 radiation elements and 12×12 polarizer elements is designed. The simulated results show that the antenna array can cover the bandwidth from 8.3 GHz to 9.2 GHz with VSWR<2.0 and the axial ratio below 3.0 dB. The realized gain varies from 17.8 dB to 18.0 dB over the frequency band. The taper feeding is used here.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"104 5 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":"126115093","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: 10.23919/USNC/URSI49741.2020.9321603
S. Garman, Y. Kuga, Oliver Ruo
EM coupling in Mars soils is important for water-extraction on Mars. We present new measurement data for thermal rise in Mars soil simulants across a range of microwave frequencies. Results show an inverse relationship between frequency and thermal rise. Data is collected at low temperature to simulate the Mars environment.
{"title":"Electromagnetic Coupling in Mars Soil Simulants","authors":"S. Garman, Y. Kuga, Oliver Ruo","doi":"10.23919/USNC/URSI49741.2020.9321603","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321603","url":null,"abstract":"EM coupling in Mars soils is important for water-extraction on Mars. We present new measurement data for thermal rise in Mars soil simulants across a range of microwave frequencies. Results show an inverse relationship between frequency and thermal rise. Data is collected at low temperature to simulate the Mars environment.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"124 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":"125463288","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: 10.23919/USNC/URSI49741.2020.9321629
Turfa S. Amin, A. Kishk
A contactless circular waveguide adapter made of a bed of pins is proposed. The bed of pins are surrounding a circular waveguide opening from both ends to be used between the flanges of two standard circular waveguides. The bed of pins surface is making an artificial magnetic conductor (AMC). Inserting the adapter between the flanges of the waveguide prevents signal leakage even with no contact is assured. The adapter with bed of pins can be used for circular waveguides covering multiple mm-wave frequency bands between 50 and 110 GHz. The same adapter can be used with different circular waveguide diameters that operate within the 50- 110 GHz by changing the adapter circular waveguide diameter.
{"title":"Contactless Waveguide Adapter for Multiple Frequency Bands","authors":"Turfa S. Amin, A. Kishk","doi":"10.23919/USNC/URSI49741.2020.9321629","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321629","url":null,"abstract":"A contactless circular waveguide adapter made of a bed of pins is proposed. The bed of pins are surrounding a circular waveguide opening from both ends to be used between the flanges of two standard circular waveguides. The bed of pins surface is making an artificial magnetic conductor (AMC). Inserting the adapter between the flanges of the waveguide prevents signal leakage even with no contact is assured. The adapter with bed of pins can be used for circular waveguides covering multiple mm-wave frequency bands between 50 and 110 GHz. The same adapter can be used with different circular waveguide diameters that operate within the 50- 110 GHz by changing the adapter circular waveguide diameter.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"7 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":"128536282","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: 10.23919/USNC/URSI49741.2020.9321590
Syed M. Sifat, S. Shams, A. Kishk
Gap waveguide is one of the promising technologies in 5G & mm-wave applications due to their low cost, low losses, and high power handling capability. In this work, we have proposed a featured design of an antenna with metamaterial layers to provide a high gain and wide bandwidth simultaneously. The antenna fed by an emerging guiding structure entitled Printed ridge gap waveguide (PRGW), which is planar, lower loss, and works very well at mm-wave frequency range. The antenna offers a stable radiation pattern with a very high gain of 12 dBi, which facilitates the utilization of such an antenna in covering large areas or achieving high penetration.
{"title":"Wideband PRGW Polygon Antenna Augmented with Metamaterial Lens","authors":"Syed M. Sifat, S. Shams, A. Kishk","doi":"10.23919/USNC/URSI49741.2020.9321590","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321590","url":null,"abstract":"Gap waveguide is one of the promising technologies in 5G & mm-wave applications due to their low cost, low losses, and high power handling capability. In this work, we have proposed a featured design of an antenna with metamaterial layers to provide a high gain and wide bandwidth simultaneously. The antenna fed by an emerging guiding structure entitled Printed ridge gap waveguide (PRGW), which is planar, lower loss, and works very well at mm-wave frequency range. The antenna offers a stable radiation pattern with a very high gain of 12 dBi, which facilitates the utilization of such an antenna in covering large areas or achieving high penetration.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"23 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":"123958083","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: 10.23919/USNC/URSI49741.2020.9321679
Tayfun Özdemir, C. N. Davis, D. Ariando, S. Mandal
Antenna size increases with wavelength in order to maintain the radiation efficiency so, for low frequencies, grows prohibitively large. Because real estate is at premium in any platform, such restrictions produce electrically small antennas with low radiation efficiency and narrow instantaneous bandwidth (IBW), putting severe limitations on transmit data rates. The HF band provides favorable propagation characteristics but legacy HF antenna systems suffer from both radiation efficiency and IBW limitations. This paper describes theoretical and simulation work on demonstrating a HF direct antenna modulation (DAM) scheme to overcome this fundamental trade-off.
{"title":"Direct Antenna Modulation for Wide-Band HF Communications","authors":"Tayfun Özdemir, C. N. Davis, D. Ariando, S. Mandal","doi":"10.23919/USNC/URSI49741.2020.9321679","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321679","url":null,"abstract":"Antenna size increases with wavelength in order to maintain the radiation efficiency so, for low frequencies, grows prohibitively large. Because real estate is at premium in any platform, such restrictions produce electrically small antennas with low radiation efficiency and narrow instantaneous bandwidth (IBW), putting severe limitations on transmit data rates. The HF band provides favorable propagation characteristics but legacy HF antenna systems suffer from both radiation efficiency and IBW limitations. This paper describes theoretical and simulation work on demonstrating a HF direct antenna modulation (DAM) scheme to overcome this fundamental trade-off.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"180 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":"123371748","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: 10.23919/USNC/URSI49741.2020.9321644
Yong Wei, Chaoxian Qi, Jiefu Chen
A conical spiral transmission line-based sensor (CSTLS) is introduced to measure the water holdup in oil-water two-phase flows. The theoretical model of the transmission line is given to describe the electromagnetic wave propagation on the CSTLS. Numerical simulations and experimental results show the water holdup of the measured fluid is approximately linearly proportional to the phase shift of the signals detected by sensors. The detection resolution is up to 3% in the whole range of water holdup from 0% to 100%.
{"title":"Borehole Water Holdup Detection Using Conical Spiral Transmission Line","authors":"Yong Wei, Chaoxian Qi, Jiefu Chen","doi":"10.23919/USNC/URSI49741.2020.9321644","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321644","url":null,"abstract":"A conical spiral transmission line-based sensor (CSTLS) is introduced to measure the water holdup in oil-water two-phase flows. The theoretical model of the transmission line is given to describe the electromagnetic wave propagation on the CSTLS. Numerical simulations and experimental results show the water holdup of the measured fluid is approximately linearly proportional to the phase shift of the signals detected by sensors. The detection resolution is up to 3% in the whole range of water holdup from 0% to 100%.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"49 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":"114239983","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: 10.23919/USNC/URSI49741.2020.9321599
Babak Molaei, A. Kishk
In this paper, a new method is applied to the Franklin antenna concept in order to enhance the impedance bandwidth to more than an octave and retain the main beam direction in broadside mode within much more bandwidth with less than 3 dB gain fluctuation. Moreover, a very fine-shaped controllable fan-beam pattern is achieved using this technique.
{"title":"Innovative Octave-band Double-In-Phase-Fed Franklin Antenna for V/E-band Applications","authors":"Babak Molaei, A. Kishk","doi":"10.23919/USNC/URSI49741.2020.9321599","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321599","url":null,"abstract":"In this paper, a new method is applied to the Franklin antenna concept in order to enhance the impedance bandwidth to more than an octave and retain the main beam direction in broadside mode within much more bandwidth with less than 3 dB gain fluctuation. Moreover, a very fine-shaped controllable fan-beam pattern is achieved using this technique.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"58 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":"132915476","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: 10.23919/USNC/URSI49741.2020.9321688
Y. Salchak, N. Albadri, D. Thiel, H. G. Espinosa
The accurate location of an internal radio transmitter is important for long-term patient monitoring. An inverse solution for the surface field attenuation-based algorithm provides a simple position estimation but is degraded by noise and movement artefacts. Using the minimum cost function between the predicted and experimentally received signal strength indicators (RSSI) for four skin-surface receivers, the localization accuracy within 10 mm was achieved even with movement and external Gaussian noise. The relationship between RMSE value of each coordinate component in 3D under various noise levels provides a location accuracy estimate.
{"title":"Location Accuracy Estimates of an Ingested Wireless Endoscopy Capsule based on an RSSI Cost Function","authors":"Y. Salchak, N. Albadri, D. Thiel, H. G. Espinosa","doi":"10.23919/USNC/URSI49741.2020.9321688","DOIUrl":"https://doi.org/10.23919/USNC/URSI49741.2020.9321688","url":null,"abstract":"The accurate location of an internal radio transmitter is important for long-term patient monitoring. An inverse solution for the surface field attenuation-based algorithm provides a simple position estimation but is degraded by noise and movement artefacts. Using the minimum cost function between the predicted and experimentally received signal strength indicators (RSSI) for four skin-surface receivers, the localization accuracy within 10 mm was achieved even with movement and external Gaussian noise. The relationship between RMSE value of each coordinate component in 3D under various noise levels provides a location accuracy estimate.","PeriodicalId":443426,"journal":{"name":"2020 IEEE USNC-CNC-URSI North American Radio Science Meeting (Joint with AP-S Symposium)","volume":"12 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":"127647903","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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