Dual-Band Circularly Polarized Dielectric Resonator Antenna for WLAN and WiMAX Applications

Abstract

In this paper, a new dual-band circularly polarized (CP) dielectric resonator antenna for WLAN and WiMAX applications is proposed. The dielectric resonator has an asymmetric Y-shaped geometry. By properly selecting the length of the arms, the pairs of fundamental (TE 111 ) and second-order (TE 211 ) are excited separately at the design frequencies to radiate the CP wave. The measurement shows that the fabricated antenna exhibits a wide impedance bandwidth for |S 11 | < −10 dB of 62.07% (2.2–4.18 GHz). The far-field measurements in the broadside direction demonstrated a dual-band CP response with 3 dB ARBWs of 4.92%(2.38–2.5 GHz) at the lower and 12.64% (3.26–3.70 GHz) at the upper band. The measured CP bands cover the entire frequency range of WLAN (2.401–2.495 GHz) and WiMAX (3.4–3.69 GHz) at the lower and upper bands, respectively.

Circular Patch Fed Rectangular Dielectric Resonator Antenna with High Gain and High Efficiency for Millimeter Wave 5G Small Cell Applications

“…Further, for a given resonant frequency, two aspect ratios of a rectangular DRA (height/length and width/length) can be chosen independently. Maximum impedance bandwidth can be achieved using a impedance match between the connector and the DRA [7]. The major advantage of using the rectangular DRA is characterized by three independent geometrical dimensions along three different coordinate axis, and the height of the DRA is d, which enhances maximum flexibility in the physical dimensions of rectangular DRA while compared to the cylindrical DRA [8,9].…”

Size-Reduction of a Dual-Band Circularly Polarized Dielectric Resonator Antennas

“…In this paper, we presented a size reduction of a dual-band CP DRA by exploiting the unconventional shape of the DR. The geometry of the DR is Y-shaped that has arms of unequal length and where the combination of linearly polarized Efield from different arms combine to produce CP radiation in the WLAN and WiMAX frequency bands [32]. By applying the PEC boundary on the longest arm, a size reduction with CP radiation is achieved but the required bands are not entirely covered.…”

Design of Dielectric Resonator Antenna Using Dielectric Paste

“…For example, many DRAs employ very special geometric shapes, such as flipped staired DRAs, H-shaped DRAs, T-shaped DRAs [4][5][6], or employ different dielectric constants, such as multilayer ring DRAs or perforated DRAs [7][8][9]. Other structures may employ even more exotic structures, such as hook shaped DRAs [10], Y-shaped DRAs [11], pixelated DRAs [12], multiple circular sector DRAs [13], or have notches [14] and hollow regions in their DRA structures [15]. These structures, even though they may possess remarkable features, such as wide bandwidths, high gains, or multi-band operation, may not be easily manufactured using common methods and materials.…”

“…Figure11. Photograph of the fabricated antenna prototype with the following dimensions: a = 25.6 mm, b = 25 mm, h = 41 mm, w slot = 5.2 mm, l slot,1 = 32.6 mm, l slot,2 = 18.7 mm, l stub = 8.5 mm, l G = w G = 90 mm, and w strip = 2.7 mm.…”