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":null,"pages":null},"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/imarc49196.2021.9714708
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":null,"pages":null},"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":null,"pages":null},"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/imarc49196.2021.9714566
D. Choudhary, R. Chaudhary
This paper presents the design of compact filtering branch line coupler (BLC) with coupled transmission line (TL) for the Global System of Mobile Communications application. The presented BLC provides equal power split among output ports ± 1.0 dB imbalance of amplitude and phase variation from $145^{0}$ to $-125^{0}$ at an operating frequency of 0.83 GHz. It occupies $0.07 lambda_{0} times 0.06 lambda_{0}(26.0 mathrm{~mm} times 22.5 mathrm{~mm})$ at 0.83 GHz, provides 92 % compactness over the conventional design of branch line coupler at the identical operating frequency. It gives 10 dB fractional bandwidth of 38.5 %(0.67-0.99 GHz) with reflection coefficient 37.5 dB and isolation of 43.0 dB at operating frequency.
{"title":"Compact Design of Filtering Branch Line Coupler for GSM Frequencies Using Coupled TL","authors":"D. Choudhary, R. Chaudhary","doi":"10.1109/imarc49196.2021.9714566","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714566","url":null,"abstract":"This paper presents the design of compact filtering branch line coupler (BLC) with coupled transmission line (TL) for the Global System of Mobile Communications application. The presented BLC provides equal power split among output ports ± 1.0 dB imbalance of amplitude and phase variation from $145^{0}$ to $-125^{0}$ at an operating frequency of 0.83 GHz. It occupies $0.07 lambda_{0} times 0.06 lambda_{0}(26.0 mathrm{~mm} times 22.5 mathrm{~mm})$ at 0.83 GHz, provides 92 % compactness over the conventional design of branch line coupler at the identical operating frequency. It gives 10 dB fractional bandwidth of 38.5 %(0.67-0.99 GHz) with reflection coefficient 37.5 dB and isolation of 43.0 dB at operating frequency.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132183192","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/imarc49196.2021.9714650
Ankur Prasad, M. Thorsell, H. Zirath, C. Fager
This paper investigates the influence of field-plates on the trapping effects in GaN HEMTs. Conclusions are drawn from the comparison of the extracted parameters of a Shockley- Read-Hall theory-based empirical trap model for devices with and without field-plates. The model separates the influence of the trap potential and the modulation of the drain-source current due to the trapped electrons. Lower trap potential is observed in the presence of a field-plate due to a lower number of trapped electrons. On the other hand, the trapped charges have a larger influence on the current in the field-plated devices. The extracted parameters, therefore, show a trade-off between reduced trap potential and increased influence on the current in the device with the added field-plate.
{"title":"Analyzing The Back-Gating Effect in GaN HEMTs with Field-Plates Using an Empirical Trap Model","authors":"Ankur Prasad, M. Thorsell, H. Zirath, C. Fager","doi":"10.1109/imarc49196.2021.9714650","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714650","url":null,"abstract":"This paper investigates the influence of field-plates on the trapping effects in GaN HEMTs. Conclusions are drawn from the comparison of the extracted parameters of a Shockley- Read-Hall theory-based empirical trap model for devices with and without field-plates. The model separates the influence of the trap potential and the modulation of the drain-source current due to the trapped electrons. Lower trap potential is observed in the presence of a field-plate due to a lower number of trapped electrons. On the other hand, the trapped charges have a larger influence on the current in the field-plated devices. The extracted parameters, therefore, show a trade-off between reduced trap potential and increased influence on the current in the device with the added field-plate.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134235852","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/imarc49196.2021.9714711
Sriparna De, S. Koul, K. Samanta
A mechanical tuning technique is proposed to design two compact reconfigurable filters in SIW technology. Cylindrical dielectric rods are loaded at the cavities of the filters and their dielectric material is changed to show tunability in the center frequency of the filters. A reconfigurable SIW cavity resonator is designed first to study the effect of change in relative permittivity of rods. Based on that, a reconfigurable cross coupled filter, and a Half Mode SIW (HMSIW) iris window coupled band pass filter are designed using full wave EM simulation software. Then they are fabricated and experimentally verified with measarements. The preliminary experiment shows wide range of tunability with low insertion loss $(lt 2mathrm{~dB})$ and good return loss $gt 10 mathrm{dB}$) for all tunable cases.
{"title":"Miniaturized Reconfigurable Band Pass Filters","authors":"Sriparna De, S. Koul, K. Samanta","doi":"10.1109/imarc49196.2021.9714711","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714711","url":null,"abstract":"A mechanical tuning technique is proposed to design two compact reconfigurable filters in SIW technology. Cylindrical dielectric rods are loaded at the cavities of the filters and their dielectric material is changed to show tunability in the center frequency of the filters. A reconfigurable SIW cavity resonator is designed first to study the effect of change in relative permittivity of rods. Based on that, a reconfigurable cross coupled filter, and a Half Mode SIW (HMSIW) iris window coupled band pass filter are designed using full wave EM simulation software. Then they are fabricated and experimentally verified with measarements. The preliminary experiment shows wide range of tunability with low insertion loss $(lt 2mathrm{~dB})$ and good return loss $gt 10 mathrm{dB}$) for all tunable cases.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133400441","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/imarc49196.2021.9714615
G. R. Shalini, D. Krishna, Gs Karthikeya, S. Koul
This paper demonstrates a high gain 3D printed lens antenna at 28GHz for 5G applications. The lens is a hemispherical lens designed to improve the gain of a microstrip patch antenna. The design technique employed here is to chop the edges of the lens to realize a compact antenna. The proposed antenna is observed to provide a gain of 11.70 dBi at 28GHz.
{"title":"Design of 3D printed lens antenna for 5G applications","authors":"G. R. Shalini, D. Krishna, Gs Karthikeya, S. Koul","doi":"10.1109/imarc49196.2021.9714615","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714615","url":null,"abstract":"This paper demonstrates a high gain 3D printed lens antenna at 28GHz for 5G applications. The lens is a hemispherical lens designed to improve the gain of a microstrip patch antenna. The design technique employed here is to chop the edges of the lens to realize a compact antenna. The proposed antenna is observed to provide a gain of 11.70 dBi at 28GHz.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133297603","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":null,"pages":null},"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/imarc49196.2021.9714647
Soumen Pandit, Vishakha Pandey, J. Mukherjee
This paper presents a novel dual-band negative-permittivity low-impedance metamaterial. The proposed metamaterial shows negative-permittivity properties in the frequency bands of 6.44 - 8.62 GHz and 11.72 - 17.23 GHz irrespective of the polarization-angle and a wide range of incident-angle of the imposed EM wave. This metamaterial can be used for gain enhancement of magnetic sources of EM radiation or magnetic dipole antennas.
{"title":"Polarization- and Incident-Angle Independent Negative-Permittivity Metamaterial","authors":"Soumen Pandit, Vishakha Pandey, J. Mukherjee","doi":"10.1109/imarc49196.2021.9714647","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714647","url":null,"abstract":"This paper presents a novel dual-band negative-permittivity low-impedance metamaterial. The proposed metamaterial shows negative-permittivity properties in the frequency bands of 6.44 - 8.62 GHz and 11.72 - 17.23 GHz irrespective of the polarization-angle and a wide range of incident-angle of the imposed EM wave. This metamaterial can be used for gain enhancement of magnetic sources of EM radiation or magnetic dipole antennas.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134357696","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/imarc49196.2021.9714605
T. Prakash, M. Ameen, R. Chaudhary, R. Gangwar
In this paper, a $2 times 3$ planar two-layer stacked symmetric array antenna has been studied. It consists of ±45° tilted square patch antenna. It is an eight-port antenna. Among all, 2 ports are fed with a phase difference $left(0^{circ}, pm 90^{circ} & 180^{circ}right)$ and remaining are $50 Omega$ matched terminated. It provides all possible polarizations e.g., linear (vertical & horizontal) and circular (right & left hand) polarization. Simultaneously, it offers frequency scanning at two frequency points, 5 GHz and 5.25 GHz, by implementing traveling wave technology. The crosspolarization in V-LP and H-LP is always below -40 dB and -20 dB, respectively. The simulated axial ratio in LHCP and RHCP have also achieved always below 3 dB in the desired frequency band.
{"title":"Quad-polarization Reconfigurable Frequency Scanning 2×3 Array Antenna for 5 GHz Band Application","authors":"T. Prakash, M. Ameen, R. Chaudhary, R. Gangwar","doi":"10.1109/imarc49196.2021.9714605","DOIUrl":"https://doi.org/10.1109/imarc49196.2021.9714605","url":null,"abstract":"In this paper, a $2 times 3$ planar two-layer stacked symmetric array antenna has been studied. It consists of ±45° tilted square patch antenna. It is an eight-port antenna. Among all, 2 ports are fed with a phase difference $left(0^{circ}, pm 90^{circ} & 180^{circ}right)$ and remaining are $50 Omega$ matched terminated. It provides all possible polarizations e.g., linear (vertical & horizontal) and circular (right & left hand) polarization. Simultaneously, it offers frequency scanning at two frequency points, 5 GHz and 5.25 GHz, by implementing traveling wave technology. The crosspolarization in V-LP and H-LP is always below -40 dB and -20 dB, respectively. The simulated axial ratio in LHCP and RHCP have also achieved always below 3 dB in the desired frequency band.","PeriodicalId":226787,"journal":{"name":"2021 IEEE MTT-S International Microwave and RF Conference (IMARC)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131647096","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：