Reconfigurable microstrip patch antenna with switchable polarization

Abstract

A novel reconfigurable microstrip patch antenna with frequency and polarization diversities is proposed. A U‐slot is incorporated into a square patch, and a PIN diode is utilized to switch the slot on and off, which realizes the frequency diversity characteristic. The polarization diversities among linear polarization (LP), right‐hand circular polarization (RHCP), and left‐hand circular polarization (LHCP) are also obtained by switching three PIN diodes on the slot and the truncating corners of a square patch on and off. The antenna design and experimental results are presented.

Microstrip Antennas for Indoor Wireless Dynamic Environments

“…The proposed ACMSA has a better bandwidth and good axial ratio compared to the designs presented by [22,[24][25][26]. Further, it can receive the RHCP and the LHCP simultaneously whereas the reconfigurable www.intechopen.com patch antennas could receive only one polarization type at a time [22,[24][25][26]. Above all, the proposed geometry can provide circular polarization diversity with good axial ratio over a broad angular range, wide bandwidth and small size.…”

“…For instance, size reductions of 72% and 60 % are achieved compared to the cases of [22] and [23] respectively. The proposed ACMSA has a better bandwidth and good axial ratio compared to the designs presented by [22,[24][25][26]. Further, it can receive the RHCP and the LHCP simultaneously whereas the reconfigurable www.intechopen.com patch antennas could receive only one polarization type at a time [22,[24][25][26].…”

Compact Tri Band Frequency Reconfigurable L-Slot Octagonal Shape Patch Antenna

“…A PIN diode on the radiating patch of the antenna with Uslot is used for the frequency diversity characteristic [8]. In [9] a frequency reconfigurable antenna with the U-slot in the patch is presented for the flat input resistance and this U-slot is used for the linear input reactance across a wider bandwidth, by the use of the inductor and the variable capacitor this antenna is tunable frequency from 2.6 to 3.35…”

Planar Bowtie Antenna With a Reconfigurable Radiation Pattern

“…Accordingly, in the last years several approaches for the design of antennas providing diversity functions in operating frequency [1,2,6], polarization [3][4][5] and radiation pattern [1,[5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] have been proposed. Among them, antennas able to modify their radiation pattern while preserving the working frequency and polarization are key components for improving the performance and security of MIMO (Multiple-InputMultiple-Output) architectures [5,9].…”