Wideband circular polarized cylindrical segmented dielectric resonator antenna for ISM band applications

Abstract

In this article, cylindrical segmented dielectric resonator antenna (CDRA) is proposed for ISM band applications. To obtain the proposed antenna, three different (120°, 60°, and 30°) segments of different cylindrical radius r1, r2, and r3 with stacked angular displacement are used for circular polarization with wideband frequency response. Quadrature phase shift of orthogonal field are observed when segment of cylinder is stacked with specific angular displacement. Various higher order modes are investigated. The simulated and measured impedance bandwidth of the proposed antenna is 90% (3.3 GHz‐8.7 GHz) and 83.4% (3.5 GHz‐8.5 GHz) respectively and the simulated and measured axial ratio bandwidth is 53.8% (3.8 GHz‐6.6 GHz) and 58.5% (3.5 GHz‐6.4 GHz), respectively. Proposed antenna attains 7.1 dBi measured peak gain at 8.5 GHz with more than 80% radiation efficiency in the frequency band. The fabricated prototype is experimentally measured and its results are found to be commensurable with the simulation results.

Linearly and circularly polarized filtering patch antennas with enhanced gain selectivity on a single‐layer substrate

“…16,17 CP antennas with modified slots or substrate-integrated waveguide are investigated. [18][19][20][21] A CP filtering patch antenna for wearable applications is reported in Reference 22 where the LP filtering case is firstly designed to satisfy the condition of equal-magnitude, and CP radiation is achieved by an additional λ/4 delay line. After that, in References 23-27, two signal paths with different numbers of coupled resonators are utilized as a dual-fed network, and the conditions of magnitude and phase of wideband CP radiation can be simultaneously satisfied in such a co-design procedure.…”