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A new dual‐mode wideband circularly polarized rectangular dielectric resonator antenna coupled with stubs and asymmetric ground plane for WiMAX applications
Author(s) -
Kumar Rajkishor,
Chowdhury Rakesh,
Chaudhary Raghvendra Kumar
Publication year - 2017
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.21150
Subject(s) - ground plane , dielectric resonator antenna , wideband , optics , microstrip antenna , physics , j pole antenna , bandwidth (computing) , axial ratio , microstrip , patch antenna , monopole antenna , stub (electronics) , circular polarization , electrical engineering , coaxial antenna , resonator , antenna (radio) , engineering , telecommunications
In this article, a new radiating stub microstrip feed has been investigated with asymmetrical ground plane for generation of circular polarization (CP) in a dielectric resonator antenna (DRA). Here, asymmetrical ground plane and 3 radiating stubs with microstrip feed line are used for generation of 2 different modes namely TE 11δ and TE 12δ in rectangular DRA. By using mode matching concepts, these modes are responsible for enhancing the impedance bandwidth (TE 12δ ie,TE 12 δ xandTE 12 δ y) and axial ratio (AR) bandwidth (TE 11δ ie,TE 11 δ xandTE 11 δ y) in proposed antenna. Designed antenna offers measured input impedance bandwidth (|S 11 | < −10 dB) and AR bandwidth (AR < 3‐dB) of 44.78%, ranging from 4.6 to 6.9 GHz and 23.32%, ranging from 4.6 to 6.9 GHz, respectively. It has been observed that proposed antenna shows left‐handed CP fields in boresight direction with average gain of 3.15 dBic and radiation efficiency of 90.54%. Designed antenna is suitable for Wi‐MAX (3.3‐3.7 GHz) applications.