Higher Order Mode Layered Cylindrical Dielectric Resonator Antenna

Abstract

A wideband high gain circularly polarized layered cylindrical dielectric resonator antenna (DRA) that operates in a higher order mode is proposed in the X-band frequency range. The antenna consists of two dielectric layers having different dielectric constants and radii. The results demonstrate a considerably improved performance as a result of adding the outer dielectric layer, where wider impedance and axial ratio bandwidths have been attained in conjunction with a higher broadside gain of ∼ 14 dBic. A prototype has been built and measured with close agreement between experimental and simulated results.

Wide Bandwidth High Gain Circularly Polarized Millimetre-Wave Rectangular Dielectric Resonator Antenna

“…In addition, the dielectric coat serves another purpose by exciting additional resonance modes in the same band, and margining the bands of adjacent modes improves the impedance bandwidth further. It is worth pointing that wideband and high gain X-band DRAs have been reported recently by incorporating an outer dielectric coat layer [17,18]. This approach is utilized in this letter for the mm-wave band applications, where further performance improvements have been achieved by optimizing the feed network and the dielectric coat dimensions.…”

Wideband High-Gain Millimetre-Wave Three-Layer Hemispherical Dielectric Resonator Antenna

“…The impedance bandwidth can be significantly increased by the addition of a dielectric coat that acts as a transition region between the antenna and free space. Recently, it has been reported that coating the DRA can also improve the gain and circular polarisation as well as impedance bandwidths [7,8]. Furthermore, wideband multi-layer hemispherical DRAs have been reported in [9] utilizing a slot aperture feed, where a bandwidth of 55% has been achieved by exciting TE 111 and TE 221 resonance modes.…”

A novel cylindrical dielectric resonator antenna based on Fibonacci series approach

“…Circular polarization in DRA is generated primarily by feeding mechanism such as single feed, multiple feed, and array of DRA using sequential rotation techniques. Feeding techniques excite the orthogonal mode and quadrature phase shift in electric field in DRA, which generates the circular polarization . Recently, fractal geometry DRAs have attracted a lot of attention for its compactness and improved bandwidth .…”

“…Feeding techniques excite the orthogonal mode and quadrature phase shift in electric field in DRA, which generates the circular polarization. [3][4][5] Recently, fractal geometry DRAs have attracted a lot of attention for its compactness and improved bandwidth. 6 Researchers have investigated the CP in DRA through trapezoidal DRA, 7 sigmoid-shaped DRA, 8 and square DRA with two unequal inclined slits 9 and also wideband circularly polarized DRA with stair-shaped slot excitation for generation of the circular polarization and wide bandwidth requirements.…”