Dual port spiral shaped dielectric resonator MIMO antenna with orthogonal modes for wideband application

Abstract

In this article, Dual port excitation spiral shaped dielectric resonator multiple input multiple output (MIMO) antenna is explored for wideband application. Dual coaxial feeding in inner and outer edge of spiral geometry generates orthogonal hybrid modes. Merging of various hybrid modes lead to a wide bandwidth of operation. HE11δx, HE11δy and HE12δx, HE12δy0.25em orthogonal radiating modes are investigated at 8.7 GHz and 11 GHz resonant frequencies, respectively. Proposed antenna covers wide operating frequency range from 8–15.1 GHz to 7.8–14.6 GHz corresponding to excitation of Port‐1 and Port‐2, respectively, is achieved between ports. Isolation below −25 dB. Envelope correlation coefficient, diversity gain, Total active reflection coefficient, radiation pattern, channel capacity loss, gain, efficiency and various other characteristics of MIMO antenna are explored. This antenna can be used for various C and X band wireless applications.

A single patch antenna with dual pairs of coupled modes forwide‐anglefrequency beam scanning

“…In Reference 15, a pin diodes‐loaded slot is utilized on the ground to change the effective form of the ground, which achieve ±78° wide‐angle discrete beam scanning at 2.4 GHz without requiring coupled mode. Different from the above directional beam‐scanning antenna, Reference 16 is an omnidirectional case achieved by a dual port spiral shaped dielectric resonator antenna.…”