Open AccessDifferentially driven wideband Fabry–Perot cavity antenna
Author(s) -
Gupta Ravi Dutt,
Parihar Manoj Singh
Publication year - 2019
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2019.0226
Subject(s) - wideband , antenna gain , fabry–pérot interferometer , optics , bandwidth (computing) , physics , antenna (radio) , radiation pattern , antenna efficiency , telecommunications , engineering , wavelength
A wideband differential Fabry–Perot cavity antenna (FPCA) is presented. Unlike the mostly used patch antennas, a rectangular dielectric resonator antenna (DRA) has been investigated as primary radiation source. A compact partially reflective surface (PRS) is proposed and used as superstrate layer over the DRA for wideband gain enhancement. Measurements show that the antenna exhibits a wide impedance bandwidth (for |S 11 |<−10 dB) as well as half‐power gain bandwidth of 30% ranging from 2.27 to 3.05 GHz with a maximum boresight gain of 9.95 dBi. However, the gain of FPCA is improved all over the band; it is 4.5 dB higher than the DRA's gain at 2.7 GHz. The differential operation provides higher noise immunity than the single‐ended high gain antennas. Furthermore, the presence of DRA and imperfect phase of PRS have been considered for estimation of optimum height of the cavity. Characteristics of a rectangular DRA in a Fabry‐Perot cavity are studied through a detailed parametric study and presented here.