Pub Date : 2021-12-17DOI: 10.1109/imarc49196.2021.9714587
Alex Raterink, Ali Farshkaran, E. Porter
Microwave imaging could provide a low-cost, easy, and non-invasive method of detecting the state of the human bladder. However, current work on bladder detection uses relatively simple models. This paper presents a complex surface model of the human torso, based on the AustinMan model, to be used in broadband simulations. Model preparation is discussed, including the selection of dielectric properties of the tissues, bladder shape construction, and necessary simplifications to facilitate simulation of the model. Simulation results suggest that differences in the dielectric properties and volume of the urine are detectable through changes in the S11 parameter of the antenna.
{"title":"Microwave Reflection-based Bladder State Discrimination with Realistic Pelvic Models: Impact of Urine Conductivity and Volume","authors":"Alex Raterink, Ali Farshkaran, E. Porter","doi":"10.1109/imarc49196.2021.9714587","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714587","url":null,"abstract":"Microwave imaging could provide a low-cost, easy, and non-invasive method of detecting the state of the human bladder. However, current work on bladder detection uses relatively simple models. This paper presents a complex surface model of the human torso, based on the AustinMan model, to be used in broadband simulations. Model preparation is discussed, including the selection of dielectric properties of the tissues, bladder shape construction, and necessary simplifications to facilitate simulation of the model. Simulation results suggest that differences in the dielectric properties and volume of the urine are detectable through changes in the S11 parameter of the antenna.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130051772","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714702
R. Torres, F. Pereira, R. Correia, N. Carvalho
This work presents the development of an all digital backscatter system powered by an energy harvester circuit. The system is composed by a solar panel as energy source and a microcontroller unit (MCU) that processes the data coming from any sensor while changing the state of a digital IO pin to perform backscatter communication. The system achieved a bit rate of 5 kb/s sending information provided by a temperature sensor.
{"title":"An All-Digital Ambient Backscatter solution powered by Energy Harvesting","authors":"R. Torres, F. Pereira, R. Correia, N. Carvalho","doi":"10.1109/imarc49196.2021.9714702","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714702","url":null,"abstract":"This work presents the development of an all digital backscatter system powered by an energy harvester circuit. The system is composed by a solar panel as energy source and a microcontroller unit (MCU) that processes the data coming from any sensor while changing the state of a digital IO pin to perform backscatter communication. The system achieved a bit rate of 5 kb/s sending information provided by a temperature sensor.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131050803","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714616
Koki Sekine, Toyoyuki Hagiwara, K. Takano, S. Hara, A. Kasamatsu, Y. Umeda
In recent years, as communication speeds increase, the 300-GHz band has been attracting attention for its wide bandwidth. To realize transmitter in such a region, research has been conducted on up-conversion mixers operating at the 300-GHz band. The problem with conventional mixers is that they can’t separate the LO and IF signal ports, and even if they could, harmonics would be generated near the RF band. In this work, we propose an up-conversion mixer with separate LO and IF ports and harmonic suppression. Using a 40-nm CMOS process, we realize the up-conversion mixer with a bandwidth of 19 GHz and a maximum output power of -42.69 dBm. If the LO signal of 5 dBm is input, the output power of approximately -20 dBm can be obtained.
{"title":"A 300 GHz Band Fundamental Up-Conversion Mixer Using 40 nm CMOS Technology","authors":"Koki Sekine, Toyoyuki Hagiwara, K. Takano, S. Hara, A. Kasamatsu, Y. Umeda","doi":"10.1109/imarc49196.2021.9714616","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714616","url":null,"abstract":"In recent years, as communication speeds increase, the 300-GHz band has been attracting attention for its wide bandwidth. To realize transmitter in such a region, research has been conducted on up-conversion mixers operating at the 300-GHz band. The problem with conventional mixers is that they can’t separate the LO and IF signal ports, and even if they could, harmonics would be generated near the RF band. In this work, we propose an up-conversion mixer with separate LO and IF ports and harmonic suppression. Using a 40-nm CMOS process, we realize the up-conversion mixer with a bandwidth of 19 GHz and a maximum output power of -42.69 dBm. If the LO signal of 5 dBm is input, the output power of approximately -20 dBm can be obtained.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132154125","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714629
D. Kumar, Kamaljeet Singh, Kumar Sangam, A. V. Nirmal
Microstrip realization of CW-based high-power amplifier at X-band is demonstrated using standard techniques. Gallium nitride devices are employed for high power application in the output chain. The present article demonstrates realization of a 25W power amplifier with the minimal number of active devices. Microstrip implementation and simple topology shows the effectiveness of the adopted methodology in achieving high power and efficiency. Further, the developed topology is integrated with the data transmitter and characterized for various parameters including EVM. This article details the various methodologies, microstrip realization, characterization and thermal study.
{"title":"Realization of compact Continuous Wave-based X-Band Power Amplifier using GaN device for Data Transmitter Applications","authors":"D. Kumar, Kamaljeet Singh, Kumar Sangam, A. V. Nirmal","doi":"10.1109/imarc49196.2021.9714629","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714629","url":null,"abstract":"Microstrip realization of CW-based high-power amplifier at X-band is demonstrated using standard techniques. Gallium nitride devices are employed for high power application in the output chain. The present article demonstrates realization of a 25W power amplifier with the minimal number of active devices. Microstrip implementation and simple topology shows the effectiveness of the adopted methodology in achieving high power and efficiency. Further, the developed topology is integrated with the data transmitter and characterized for various parameters including EVM. This article details the various methodologies, microstrip realization, characterization and thermal study.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"726 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132326211","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714617
A. Bhattacharya, Shrija Bhattacharyya, Mahendra P. S. Bhadoria, Latheef A. Shaik, Harshita Tolani, P. Chakraborty, R. Jyoti
This paper presents the design and realization of narrow-band channel selection filter, required for mm-wave ground based sounding applications. The selection of channel frequency is mainly ascertained in order to facilitate the atmospheric vertical sounding upto an altitude of 10km. In order to accommodate above absorption bands, 3 identical IF backend channels (at 4.9GHz) are designed. Hence, one band pass filter (BPF) is proposed and fabricated using 25 mil alumina substrate which provides 344MHz noise equivalent bandwidth. Finally, the BPF is integrated with harmonic reject filter (HRF) in order to meet wider rejection band up to 20GHz.
{"title":"Design and Realization of Channel Selection Filter for mm-Wave Atmospheric Sounding Application","authors":"A. Bhattacharya, Shrija Bhattacharyya, Mahendra P. S. Bhadoria, Latheef A. Shaik, Harshita Tolani, P. Chakraborty, R. Jyoti","doi":"10.1109/imarc49196.2021.9714617","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714617","url":null,"abstract":"This paper presents the design and realization of narrow-band channel selection filter, required for mm-wave ground based sounding applications. The selection of channel frequency is mainly ascertained in order to facilitate the atmospheric vertical sounding upto an altitude of 10km. In order to accommodate above absorption bands, 3 identical IF backend channels (at 4.9GHz) are designed. Hence, one band pass filter (BPF) is proposed and fabricated using 25 mil alumina substrate which provides 344MHz noise equivalent bandwidth. Finally, the BPF is integrated with harmonic reject filter (HRF) in order to meet wider rejection band up to 20GHz.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129517816","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714708
Kabir das Ayinala, P. K. Sahu
This work introduces a compact novel four-port Multiple-Input Multiple-Output structure with DGS-based decoupling elements for the 5.2GHz band of WLAN standards. The DGS decoupling elements are L-shaped open-ended slots etched on the ring-shaped common ground plane between the curve-shaped radiating elements. The optimized decoupling slots function as bandstop filters to suppress the surface current distribution through the common ground plane in the targeted 5.2 GHz band (5.15-5.35GHz) to enhance the isolation. The MIMO antenna achieves peal isolation of 23 and 26dB between adjacent and diagonal elements despite its compact footprint of $24times 24$ mm2.
{"title":"A Novel DGS-Based Bandstop Filters Integrated Compact Four-Port MIMO Antenna for IEEE 802.11n/ac WLAN Standards","authors":"Kabir das Ayinala, P. K. Sahu","doi":"10.1109/imarc49196.2021.9714708","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714708","url":null,"abstract":"This work introduces a compact novel four-port Multiple-Input Multiple-Output structure with DGS-based decoupling elements for the 5.2GHz band of WLAN standards. The DGS decoupling elements are L-shaped open-ended slots etched on the ring-shaped common ground plane between the curve-shaped radiating elements. The optimized decoupling slots function as bandstop filters to suppress the surface current distribution through the common ground plane in the targeted 5.2 GHz band (5.15-5.35GHz) to enhance the isolation. The MIMO antenna achieves peal isolation of 23 and 26dB between adjacent and diagonal elements despite its compact footprint of $24times 24$ mm2.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125064134","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714591
Shobit Agarwal, G. Murtaza, A. Costanzo, D. Masotti
In this paper, an angularly stable super wideband metasurface is reported. The designed metasurface consists of a square Split Ring Resonator (SRR) and a circular SRR each having two cuts in adjacent sides for polarization conversion purposes. The proposed metasurface is operating within 11 - 35GHz and having a relative impedance bandwidth of 104.3%. The design shows a stable response for oblique incidence up to 40 degrees. The Polarization Conversion Ratio (PCR) of the proposed metasurface is above 62% within the entire operating band.
{"title":"A Super Wideband Angularly Stable Metasurface for Cross Polarization Conversion Applications","authors":"Shobit Agarwal, G. Murtaza, A. Costanzo, D. Masotti","doi":"10.1109/imarc49196.2021.9714591","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714591","url":null,"abstract":"In this paper, an angularly stable super wideband metasurface is reported. The designed metasurface consists of a square Split Ring Resonator (SRR) and a circular SRR each having two cuts in adjacent sides for polarization conversion purposes. The proposed metasurface is operating within 11 - 35GHz and having a relative impedance bandwidth of 104.3%. The design shows a stable response for oblique incidence up to 40 degrees. The Polarization Conversion Ratio (PCR) of the proposed metasurface is above 62% within the entire operating band.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"180 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124507993","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714704
B. Minnaert, G. Monti, A. Costanzo, M. Mongiardo
A general procedure to optimize a multiple-input multiple-output (MIMO) capacitive wireless power transfer system is described, i.e. a configuration with multiple transmitters and multiple receivers. A step-by-step procedure is presented to maximize the system efficiency, by determining the optimal loads and sources. The wireless link is considered fixed, and can be characterized by an admittance matrix, determined by analytical calculations, full-wave simulations or measurements.
{"title":"General Procedure to Optimize a MIMO Capacitive Wireless Power Transfer System","authors":"B. Minnaert, G. Monti, A. Costanzo, M. Mongiardo","doi":"10.1109/imarc49196.2021.9714704","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714704","url":null,"abstract":"A general procedure to optimize a multiple-input multiple-output (MIMO) capacitive wireless power transfer system is described, i.e. a configuration with multiple transmitters and multiple receivers. A step-by-step procedure is presented to maximize the system efficiency, by determining the optimal loads and sources. The wireless link is considered fixed, and can be characterized by an admittance matrix, determined by analytical calculations, full-wave simulations or measurements.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127630759","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714671
Kenta Sahara, K. Takano, S. Hara, A. Kasamatsu, Y. Umeda
We propose a simple way to increase the bandwidth and reduce the group-delay variation of a multi-stage amplifier in the sub-terahertz range. The method is to use transistors with low nodal quality factors [3] for the amplifier. To verify the proposed method, a four-stage amplifier is fabricated using a $0.13mumathrm{m}$ SiGe BiCMOS process. The amplifier has the maximum gain of 5.42dB, the 3dB bandwidth of over 30GHz, 12.8ps.
{"title":"A Wideband Multi-Stage Amplifier with Low Group-Delay Variation Using Transistors with Low Nodal Quality Factors in Sub-Terahertz Band","authors":"Kenta Sahara, K. Takano, S. Hara, A. Kasamatsu, Y. Umeda","doi":"10.1109/imarc49196.2021.9714671","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714671","url":null,"abstract":"We propose a simple way to increase the bandwidth and reduce the group-delay variation of a multi-stage amplifier in the sub-terahertz range. The method is to use transistors with low nodal quality factors [3] for the amplifier. To verify the proposed method, a four-stage amplifier is fabricated using a $0.13mumathrm{m}$ SiGe BiCMOS process. The amplifier has the maximum gain of 5.42dB, the 3dB bandwidth of over 30GHz, 12.8ps.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117181530","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 : 2021-12-17DOI: 10.1109/imarc49196.2021.9714602
Aditi Sharma, Saptarshi Ghosh, K. V. Srivastava
In this paper, a dual-polarized active switchable frequency selective structure loaded with PIN diodes has been designed. The proposed geometry switches the working states between a rasorber and an absorber during OFF and ON states of the diode, respectively. The topology is double-layered; the top lossy layer is made of a swastika-shaped cross-dipole geometry with embedded lumped resistors, whereas the bottom layer has a slot geometry loaded with PIN diodes. These diodes are soldered across the slot to exhibit the switching property. During absorption mode, a wide bandwidth having absorptivity above 90% is achieved for the range 4.39 GHz to 13.16 GHz. During the rasorber mode, the absorption bandwidth remains almost constant, whereas an additional transmission peak appears at 12.78 GHz. The proposed design is also made compact, with the unit cell dimensions $0.145 lambda_{L} times 0.145 lambda_{L}$, where $lambda_{L}$ designates the operating wavelength at the lowest absorption frequency (4.39 GHz).
{"title":"A Dual-Polarized Broadband Switchable Frequency Selective Rasorber/ Absorber","authors":"Aditi Sharma, Saptarshi Ghosh, K. V. Srivastava","doi":"10.1109/imarc49196.2021.9714602","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714602","url":null,"abstract":"In this paper, a dual-polarized active switchable frequency selective structure loaded with PIN diodes has been designed. The proposed geometry switches the working states between a rasorber and an absorber during OFF and ON states of the diode, respectively. The topology is double-layered; the top lossy layer is made of a swastika-shaped cross-dipole geometry with embedded lumped resistors, whereas the bottom layer has a slot geometry loaded with PIN diodes. These diodes are soldered across the slot to exhibit the switching property. During absorption mode, a wide bandwidth having absorptivity above 90% is achieved for the range 4.39 GHz to 13.16 GHz. During the rasorber mode, the absorption bandwidth remains almost constant, whereas an additional transmission peak appears at 12.78 GHz. The proposed design is also made compact, with the unit cell dimensions $0.145 lambda_{L} times 0.145 lambda_{L}$, where $lambda_{L}$ designates the operating wavelength at the lowest absorption frequency (4.39 GHz).","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121170866","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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