A Circular Polarization-Reconfigurable Antenna With Enhanced Axial Ratio Bandwidth

Wideband and low profile multipolarization reconfigurable antenna based on metasurface

“…One method to expand the operating bandwidth is to utilize coupled feeding and excite the parasitic element. 8,9 Ye et al 8 present an antenna loaded with a circular coupled slot with a wider operating impedance bandwidth of 31.6%, but it lacks sufficient reconfigurability. Li et al 9 utilizes multiple resonances by loading I-shaped monopoles to improve operating bandwidth and tri-polarization diversities.…”

“…It is observed that the patch antenna has many advantages of a simple mechanism, high gain, and so on, but suffers from limited bandwidth. One method to expand the operating bandwidth is to utilize coupled feeding and excite the parasitic element 8,9 . Ye et al 8 present an antenna loaded with a circular coupled slot with a wider operating impedance bandwidth of 31.6%, but it lacks sufficient reconfigurability.…”

“…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.…”

“…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%.…”

Low‐profile multi‐polarization and pattern reconfigurable antenna based on metasurface

“…Multi‐polarization and pattern reconfigurable antennas generally possess more than two polarization modes, and they can switch the work state according to the communication requirement. There have three common approaches to realizing a polarization reconfigurable antenna, one is to reconfigure the radiator by some radio frequency (RF) switches [2–4], another one is to design a phase‐shift network [5–7], and the other is to utilize the metasurface (MS) [8–10]. A ±45° polarization reconfigurable antenna proposed in [2] has a low profile of 0.04 λ , but a narrow operating bandwidth of 5.7%.…”