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High inter‐port isolation dual circularly polarized slot antenna with interdigital capacitor
Author(s) -
Chaudhuri Sumantra,
Kshetrimayum Rakhesh S.,
Sonkar Ramesh K.
Publication year - 2019
Publication title -
international journal of rf and microwave computer‐aided engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.335
H-Index - 39
eISSN - 1099-047X
pISSN - 1096-4290
DOI - 10.1002/mmce.21903
Subject(s) - bandwidth (computing) , electrical engineering , physics , slot antenna , microstrip antenna , optoelectronics , optics , antenna (radio) , telecommunications , computer science , engineering
A planar dual circularly polarized slot antenna is presented. The designed antenna has two tilted “8” shaped slots fed by microstrip lines, one each for transmission ( T X ) and reception ( R X ) operations. The isolation between the two ports ( T X and R X ) is augmented by means of an interdigital capacitor based bandstop filter. The proposed antenna has an impedance bandwidth of 361 MHz centered at 2.293 GHz (2.113‐2.474 GHz) with the isolation between the ports being >17.6 dB which goes up to a value as high as 46 dB within the band of operation. The 3 dB axial ratio (AR) bandwidth is 11.52% centered at 2.1275 GHz (2.005‐2.25 GHz). Because of its high inter‐port isolation within the AR bandwidth, the design is suitable as a full‐duplex antenna for applications in S‐band.