Analysis and design of inclined fractal defected ground-based circularly polarized antenna for CA-band applications

Abstract

Design of single-feed circularly polarized (CP) microstrip antenna is proposed in this article. The design employs the concept of E-shape patch with inclined fractal defected ground structure (IFDGS), which can improve the impedance bandwidth, gain, and axial ratio (AR) bandwidth. The excellent enhanced impedance bandwidth, axial ratio bandwidth, and gain are achieved by an inclined E-shaped fractal etched on the ground plane. The parameter studies of the E-shaped IFDGS are given to illustrate the way to obtain CP radiation. The third iterative IFDGS is fabricated on easily available FR4 substrate with a size of 0.494 λ0 × 0.494 λ0 × 0.019 λ0 (λ0 is the wavelength in free space at 3.624 GHz). The measured results verify the simulated results and show good agreement. The proposed antenna shows an impedance bandwidth of 12.7% at a centre frequency of 3.47 GHz and 3-dB AR bandwidth for this band is 2.39% at a centre frequency of 3.626 GHz. The measured peak gain for the proposed antenna is found as 8.1 dBi. The proposed antenna can be suitable for mobile WIMAX operation (IEEE 802.16e-2005 standard), wireless communication in CA-band and FCC.

A bandwidth reconfigurable antenna for devices in low UWB-applications

“…In addition, this promising result comes as result of working with several states of PIN diodes, unlike what the previously published works opted for. Whereas, other published works antennas do not exceed 1.7 GHz inband and -35 dB in gain according to previous works [30]. Particularly results from article [32], the evolutionary procedure frequency response of the impedance bandwidth ranges from 5.65 GHz to 5.9 GHz, and reflection coefficient value is -34.08 dB, based on this result we can model and design a new antenna with new geometry such as C-shaped slot in order to get a large wide-band.…”

A Bandwidth Reconfigurable Planar Antenna for UWB-Applications

“…The results of working with several modes show that the presented antenna has a good isolation at the operating bands with multiple resonances and the antenna gain. [18], particularly when we compared the band of our antenna with that previous works [19], [20] and [21] that the band reaches to 1.7 GHz, 0.42 GHz and 0.25 GHz respectively. It is can be clearly noticed that the proposed design has a wide large band compared to all the previous works and the highest gain value.…”

Axial Ratio Bandwidth Enhanced Proximity Fed Fractal MGS-Based Circularly Polarized Patch Antenna

“…The same element, stacked as a parasitic patch with 0.8 mm height substrate material, improved the gain considerably. A single feed E-shaped patch with inclined fractal defected ground structure (IFDGS) is proposed in this article [15]. Like the traditional patches that use notches to generate CP in [13], a similar idea has been implemented to produce CP with sector patches.…”

“…The work depicted in [16] is a slot antenna loaded with parasitic patches to obtain a maximum usable CP bandwidth. An inclined FDGS has been discussed in [17] and [15]; the fractal DGS is achieved in the ground plane inclined along the diagonal axis. The work in [18] gives a detailed understanding of the fractal structure used in the paper with a square patch.…”