Compact triband cylindrical dielectric resonator antenna with circular slots for wireless application

Abstract

In this article, low-profile and compact cylindrical dielectric resonator antenna along with circular slots and filtering structure for wireless application is reported. Proposed antenna is excited by annular-shaped microstrip line. Two ring-shaped resonators placed on opposite sides of feed line are working as a band-pass filter. These resonators are unified with wideband cylindrical dielectric resonator antenna and make it suitable for triple band operations with better isolation level. Dual ringshaped parasitic slots on a partial ground plane are used to make CDRA more compact. The proposed triple band antenna has been analyzed, studied and optimized using Ansoft HFSS simulation software. Prototype of proposed geometry has been fabricated and tested. There is a better accord between simulated and measured results. The proposed design engenders three frequency bands i.e. 2. GHz with a resonant frequency of 2.45, 3.55, and 5.35 GHz, respectively. Proposed antenna design may find suitable applications for WLAN (2.4/5.2 GHz) and WiMAX (3.5 GHz) bands. The proposed design shows an average measured gain of 4.71 dB in the three desired bands.

Compact circularly polarized triband staired rectangular dielectric resonator antenna using single and dual sections WPD with phase shifter for navigation satellite applications

“…Design of CP dielectric resonator antenna using wideband feed network was reported at center frequency of 6.5 GHz with ground plane footprint area 42 × 42 mm 2 . Compact triband cylindrical DRA was represented by Sharma et al in 2.35 to 2.52 GHz, 3.35 to 3.65 GHz, and 5.1 to 5.42 GHz frequency ranges with ground plane area of 50 × 50 mm 2 . Moreover, a compact wideband 4‐port circularly polarized dielectric resonator antenna (CPDRA) is proposed for global navigation satellite system applications in the frequency band 1.150 to 1.620 GHz with a circular ground plane diameter of 90 mm .…”

Tri-band composite cylindrical dielectric resonator antenna with hybrid mode excitation and cross-polarization suppression

“…The three segments RDRA have a good level of isolation but the antenna structure is so bulky . In order to overcome such type of drawbacks, the concept of hybrid DRA comes into the existence, which is the combination of DR and some other resonating structure such as dual C‐shaped patch fed Z‐shaped CDRA, fork shaped monopole loaded half split CDRA, bevel‐shaped patch loaded DRA, CDRA with the parasitic slots on ground plane …”

Modified annular ring patch fed cylindrical dielectric resonator antenna for WLAN/WIMAX applications

“…In order to fulfill such type of requirement, there are three methods reported in the literature, i.e. higher order mode generation , use of parasitic elements with resonating structures , and hybrid antennas . First method (generation of higher order modes) is quite easy to generate multiband characteristics in DRA such as Fang et al proposed conformal strip‐loaded CDRA .…”

“…This method also suffers from power coupling problem with parasitic structures. Finally, the concept of hybrid DRA (combination of DR with some other resonating structure) comes into the existence which is widely used these days for example, dual segment CDRA excited with dual ring‐shaped patches, multi‐segment rectangular DRA fed with three different size printed lines, aperture coupled irregular pentagon‐shaped DRA . Similarly, two half cylindrical DRA with fork‐shaped patch was presented by Khalily et al, for multiband applications .…”