A Printed Dual-Band Dual-Sense Circularly Polarized Metal-Strip Antenna With Double Split-Ring Elements

Abstract

A novel and simple dual-band dual-sense circularly polarized (CP) metal-strip antenna is proposed. The antenna fed by a coplanar waveguide (CPW) with the advantages of uniplanar geometry and easier fabrication consists of a square slot and two split-ring elements. By appropriately introducing dual split-ring elements, the proposed dual-band CP design can easily be achieved. The two resonant frequencies are controlled by the size of the two split-ring elements. The proposed antenna prototype is fabricated and measured. Experimental results show that good CP radiation performances are obtained at both resonant frequencies. The proposed antenna has an impedance bandwidth (|S 11 | ≤ −10 dB) of 63.3% (2.0 ∼ 3.9 GHz), and the dual band circular polarization with left hand circular polarization (LHCP) at 2.2 GHz and the right hand circular polarization (RHCP) at 3.8 GHz are obtained. Also, the 3-dB axial ratio bandwidths are about 220 and 190 MHz at the lower and upper band, respectively.

Design and analysis of wideband composite antenna with dual‐sense circular polarization characteristics

“…Now a days, to enhance the wireless transmission capacity and to reduce the multipath effects, the requirement of dual‐sense CP antennas are effectively increased. For this purpose, few antenna designs have been reported in the literature . In, slot antennas are used to achieve dual‐sense circular polarization characteristics.…”

“…presented CPW fed metal strip antenna with dual split rings for obtaining the dual‐band dual‐sense CP waves. The aforementioned radiator provides wide impedance bandwidth, i.e., 63.3%, but it suffers from narrow 3‐dB axial ratio bandwidth . Some researchers are also focused on dual‐sense circularly polarized dielectric resonator antenna .…”