Reconfigurable Patch Antennas With Four-Polarization States Agility Using Dual Feed Ports

Abstract

Abstract-Polarization reconfigurable patch antennas which can switch polarization states among vertical and horizontal linear polarization (LP), left-and right-hand circular polarization (CP) is demonstrated in this paper. The original orthogonal linear polarized antenna is a square patch fed by two ports at the adjacent edges. CP operations can be activated by introducing perturbations at the opposite corners of the patch. If a diode is loaded on every perturbed corner, the antenna polarization states can be alternated by controlling the bias voltage of two PIN diodes. Perturbation elements can be cut on the patch or on the ground. Two antenna prototypes are suggested, simulated, and verified by experiments. These polarization reconfigurable antennas have good antenna performances of low reflection coefficient, axial ratio, and cross-polarization (X-pol), and high isolation between two LP operations. They have concise structure with only two PIN diodes being required. The two reconfigurable antennas are low cost and can be integrated easily in wireless communication systems.

Implementation and Validation of Parasitic Stub Integrated Reconfigurable Polarization in Antennas

“…A semicircular slot with PIN diode is used to achieve polarization diversity between LP, LHCP and RHCP states in [13]. The corner truncated patch with PIN diodes to achieve polarization diversity is presented in [14][15][16][17].…”

Dual‐feed CSRR‐loaded switchable multiband microstrip patch antenna for ITS applications

“…Abutarboush et al [15] reported reconfigurable wideband and multiband C-slot antenna using dual-patch for compact wireless devices. Xue-Xia Yang et al [16] presented a reconfigurable antenna with four polarisation states using dual feed. Borhani et al [17] reported a novel printed microstrip slot antenna for switchable multiband.…”

“…Upadhyay and Tripathi [18] reported dual-port switchable multiband patch antenna. In the design of switchable antenna, switching components like PINdiodes, varactor diodes, or microelectromechanical system switches are most frequently used components [10][11][12][13][14][15][16][17][18]. In microstrip patch antenna, different types of excitation slots in various shapes are used such as slot loop, open stub, and slots for capacitive and inductive coupling.…”

Pin-diode based switchable multiband dual feed microstrip patch antenna

“…For WLAN/WiMAX applications, a CPW‐fed antenna with an E‐shaped strip inside C‐shaped radiating elements is presented . A reconfigurable patch antenna using dual feed ports with four polarization states is presented using only two PIN‐diodes switches . For cognitive radio, a frequency‐reconfigurable monopole antenna is proposed using PIN‐diodes with wide tuning range .…”