Krishna Tej Varma Nagaraju, Satish Srivastava, Gaurangi Gupta, K. Kumari, Rajesh Chivukula, A. Harish
{"title":"Dual Polarized Shared Aperture Cavity Backed Antenna for K/Ka band operation","authors":"Krishna Tej Varma Nagaraju, Satish Srivastava, Gaurangi Gupta, K. Kumari, Rajesh Chivukula, A. Harish","doi":"10.1109/InCAP52216.2021.9726403","DOIUrl":null,"url":null,"abstract":"In this paper, a dual band dual linear polarized printed antenna with ring shaped aperture as the radiating element is proposed. The radiating ring aperture is backed by a cavity that is fed by an aperture coupled microstrip line. H-shaped slots are used for coupling the microstrip line to the cavity due to their small size compared to a simple rectangular slot. Tapered gradient has been used in the H- shaped slots to increase the bandwidth and reduce the cross polar level. The proposed antenna uses a single radiating surface for dual band operation which makes the antenna low profile. A dual port slot coupled arrangement for both the bands poses several challenges thus a tightly packed arrangement of vias around the central aperture is used to improve the coupling between the two bands. The bandwidth achieved at K and Ka band are, 18.06% and 13.9% respectively, minimum element gain across the bands is 6.73 dBi and 5.15 dBi, minimum cross polarization levels are 26.9 dB and 32 dB with a small element of size $9\\times 9$ mm. The proposed antenna can be used as an element of an array for satcom application.","PeriodicalId":201547,"journal":{"name":"2021 IEEE Indian Conference on Antennas and Propagation (InCAP)","volume":"83 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2021-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2021 IEEE Indian Conference on Antennas and Propagation (InCAP)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/InCAP52216.2021.9726403","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
In this paper, a dual band dual linear polarized printed antenna with ring shaped aperture as the radiating element is proposed. The radiating ring aperture is backed by a cavity that is fed by an aperture coupled microstrip line. H-shaped slots are used for coupling the microstrip line to the cavity due to their small size compared to a simple rectangular slot. Tapered gradient has been used in the H- shaped slots to increase the bandwidth and reduce the cross polar level. The proposed antenna uses a single radiating surface for dual band operation which makes the antenna low profile. A dual port slot coupled arrangement for both the bands poses several challenges thus a tightly packed arrangement of vias around the central aperture is used to improve the coupling between the two bands. The bandwidth achieved at K and Ka band are, 18.06% and 13.9% respectively, minimum element gain across the bands is 6.73 dBi and 5.15 dBi, minimum cross polarization levels are 26.9 dB and 32 dB with a small element of size $9\times 9$ mm. The proposed antenna can be used as an element of an array for satcom application.