An X-band gain-enhanced bidirectional antenna array using strip-loaded dielectric resonator operating in TE_3δ1 mode

Abstract

A bidirectional dielectric resonator (DR) antenna array using back-to-back quasi-Yagi antenna configuration is proposed and implemented for the first time. The DR operating at higher-order TE3δ1 mode is used as a magnetic dipole, applying for the driver of quasi-Yagi antenna. Due to the high-order mode employment, the antenna gain can be enhanced. By partially loading the metallic strip on the side wall of the DR, the gain can be further enhanced. In addition, a simple dual Marchand balun is constructed for feeding the two quasi-Yagi antennas directly for bidirectional radiation. To verify the design concept, a prototype operating at the X-band is fabricated and measured. Good agreement between the simulated and measured results can be observed.

Evolution of gain enhancement techniques in dielectric resonator antenna: applications and challenges

“…The antenna theory concepts [107] are utilized in [108], and four-element triangular DRA is utilized to achieve a gain of 4.76 dBi. In [109], a bidirectional DRA array using a back-to-back quasi-Yagi antenna configuration is proposed where the DR is excited at higher-order mode increasing the gain by 1.8 dBi. Though this is an array configuration, it should be noted that higher-order mode excitation results in gain enhancement.…”

An array of staircase‐shaped circularly polarized DRA

“…A simplest method of increasing the gain of DRAs is being utilized implementation of an array. 13 The implementation of an array is simpler in the case of linearly polarized antenna but maintaining the required phase difference between the required orthogonal modes is a difficult task in the case of CP antenna. Recently, an aperture coupled CPDRA array has been implemented for obtaining the wideband CP response with the axial ratio (AR) bandwidth around 23%.…”