A Reconfigurable Polarized Antenna Using Switchable Slotted Ground Structure

Abstract

In this paper, a novel design of square patch antenna with a switchable polarization sense. The propose structure is reconfigurable patch antenna with polarization states being switched among linear polarization (LP), lefthand circular polarization (LHCP) and right-hand circular polarizations (RHCP). This antenna structure has four Lshaped slots on the ground plane, and the Circular Polarization (CP) radiation can be achieved by current perturbation due to the switchable slotted ground plane. The Polarization sense of the proposed antenna is altered by the current path that is redirected with switchable p-i-n diodes on the ground slots. Since the slots and diodes are not on the patch, these are placed on ground so the influences of the slots and p-i-n diodes on antenna performance are minimized. The proposed antenna has a simple and compact structure and can radiate a LP, RHCP & LHCP wave without altering the main beam direction. The results show that polarization reconfigurable antenna has good switchable radiation performance at 2.8 GHz, which can be used for wireless communication systems.Index Terms-Circular polarization (CP), patch antenna, pi-n diode, polarization diversity, reconfigurable antenna, switchable slotted ground.I.

Reconfigurable Polarization Mimo Dielectric Resonator Antenna

“…Recently, many types of reconfigurable frequency and polarization antennas have been designed and reported in [11][12][13][14]. In [11], a frequency and pattern reconfigurable antenna consisting of three switches has been presented.…”

“…Recently, many types of reconfigurable frequency and polarization antennas have been designed and reported in [11][12][13][14]. In [11], a frequency and pattern reconfigurable antenna consisting of three switches has been presented. In the antenna structure, a lumped switch controls the operating bands, and two other switches control the beam switching of the antenna.…”