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Design of low volume circularly polarized annular ring‐shaped planar antenna for GPS applications
Author(s) -
Agrawal Niraj,
Gautam Anil K.,
Mishra Rajesh
Publication year - 2021
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.22698
Subject(s) - global positioning system , axial ratio , optics , antenna (radio) , planar , coplanar waveguide , circular polarization , radiation , physics , ground plane , polarization (electrochemistry) , dielectric , materials science , optoelectronics , telecommunications , microstrip , microwave , engineering , computer science , chemistry , computer graphics (images) , quantum mechanics
Abstract A brand‐new low volume design of an antenna working at three discrete bands of Global Positioning System namely L1, L2, and L5 bands with preferred right hand circular polarization (RHCP) radiation has been presented in this article. The radiator of RHCP antenna is designed by using eight 45° rotated micro‐strips inside the narrow width annular patch and two rectangular ground planes is incorporated on the same side of the dielectric material to exhibit a coplanar wave guide feed. The TM 11 and TM 22 modes were used to achieve RHCP radiation at global positioning system (GPS) L1 (1.5754 GHz), L2 (1.2276 GHz), and L5 (1.1764 GHz) bands. This structure has low volume of 107.5 × 96 × 1.6 mm 3 , an excellent 3 dB beam‐width of about 95°, 100° and 102° in θ = 0° direction and an optimum axial ratio band‐width of 56 MHz (1.554‐1.610 GHz), 46 MHz (1.203‐1.249 GHz), and 46 MHz (1.157‐1.203 GHz). The measured results of S 11 ascertained that the designed antenna is capable to efficiently work from 1.140 to 1.276 GHz (136 MHz) and from 1.545 to 1.588 GHz (43 MHz), respectively, which well suited for GPS L1, GPS L2, and GPS L5 applications.