A Circular Polarization Reconfigurable Antenna Based on Off‐Center‐Driven Dipoles

Abstract

A novel circular polarization (CP) reconfigurable antenna is proposed. The CP antenna consists of two folded off‐center‐driven dipoles. By switching four PIN diodes in the off‐center‐driven dipoles, the senses of CP can be changed between the left‐handed CP and the right‐handed CP. Two parasitic rectangular loops are added to the folded off‐center‐driven dipoles to improve the bandwidth. A T‐shaped microstrip probe line is used to feed the antenna. Experimental results show that the CP reconfigurable antenna achieves an impedance bandwidth of 31% (2.05–2.8 GHz) for return los >10 dB and a CP bandwidth of 16% (2.3–2.7 GHz) for axial ratio <3 dB. The measured gain of the CP reconfigurable antenna is about 7 dBi.

Wideband and low profile multipolarization reconfigurable antenna based on metasurface

“…By controlling the switch state and resetting its radiation current distribution, eventually resulting in a polarization variation. [3][4][5][6][7][8][9][10][11][12] In Chen et al, 3 a tri-polarization reconfigurable patch antenna is proposed, which changes the working mode by only two RF switches with a quite simple structure. The presented antenna has a high peak gain of 10 dBi, but a narrow operating bandwidth of 3%.…”

“…In the past decade, a common approach to designing a polarization reconfigurable antenna is to open slots on the radiator or ground plane first, and then embed the RF or optical switch. By controlling the switch state and resetting its radiation current distribution, eventually resulting in a polarization variation 3–12 . In Chen et al, 3 a tri‐polarization reconfigurable patch antenna is proposed, which changes the working mode by only two RF switches with a quite simple structure.…”

A Dual Orthogonal Fed Monopole Antenna for Circular Polarization Diversity

“…However, in the case of a single-feed antenna, at least two PIN diodes are generally used, and DC power and a bias circuit are required to implement control of the diodes. This may distort the radiation pattern of the antenna or degrade the antenna gain [5][6][7].…”

Gain Enhancement of Wideband Circularly Polarized UWB Antenna Using FSS

“…Circularly polarized (CP) antennas have attracted significant research interest over the last decade in wireless communication systems. These types of antennas are more flexible in terms of antennas orientation when they are used as a transmitter and receiver, and they are good candidates for reducing polarization mismatch, due to misalignment between transmitting and receiving antennas (Shirazi & Honarvar, 2015; Zarbakhsh et al, 2018; Zhang et al, 2019). Circularly polarized techniques and ultrawide bandwidth (UWB) technology are among the approaches proposed to optimize the performance of communication systems (Malekpour et al, 2017; Zhang et al, 2018).…”