Reconfigurable Circularly Polarized Antenna for WLAN and WiMAX

Abstract

A simple design for a bi-band circularly polarized (CP) antenna with the capability of switching its polarization between dual-sense CPs is presented in this article, by using a monopole loop antenna as a primary radiator as a proposed antenna. An additional CP band is achieved by controlling the ON/OFF states of two PIN diodes; moreover, the reconfigurability of the polarization between right-hand CP (RHCP) and left-hand CP (LHCP) at three different frequencies 2.8, 3.4 and 4 GHz is realized. For validation, a retractable patch antenna design is offered on the basis of a distinctive situation analysis. The antenna offers a low reconfigurable band and a fixed band at higher frequencies. It also presents a reconfigurable low band and a fixed band at higher frequencies where the antenna has a simulated 3 dB ARBW of 52.8% [1.9-2.5] GHz, while the axial ratio bandwidths for both the RHCP and LHCP states were 5.1% [1.9-2] GHz, 8% [2.4-2.6] GHz, and 52.8% [1.9-2.5] GHz. Located in a reflection bandwidth of -10 dB of 3% [1.62-1.67] GHz, 8% [2.4-2.6] GHz for RHCP and 3% [1.62-1.67 ] GHz, 8%[2.44-2.64 ] GHz for LHCP. The proposed antenna is suitable for wireless applications such as WLAN (2.5 GHz) and part of the medium band of WiMAX..

A Multi-Bandwidth Reconfigurable Patch Antenna for Devices in WLAN and UWB Technology Applications

“…In recent years, advances in material technology and manufacturing techniques have led to the production of patch antennas with even smaller dimensions and higher performance [9][10][11][12][13]. The quest for further reduction in PA sizes remains a research field with open challenges, where new miniaturization techniques are under development [14][15][16][17].…”