Circular Ring Shaped Polarization Reconfigurable Antenna for Wireless Communications

Abstract

A single fed polarization reconfigurable antenna is presented. The antenna comprises of a circular ring-shaped radiating element along with reconfigurable feed network located at its center which eliminates the need for additional space for reconfigurable feed network. A separate biasing network is placed to bias the pin diodes in the feed network for polarization reconfiguration and achieves three polarization states (linear, left-hand and right-hand circularly polarization). The antenna is designed to operate at 2.4 GHz ISM band. The antenna parameters are simulated using Ansoft highfrequency structure simulator and are validated using Agilent network analyzer (N9925A) and antenna test systems. The antenna achieves a good −10 dB impedance bandwidth of 85 MHz (2.40-2.485) GHz in linear state and 85 MHz (2.41-2.495) GHz in the circularly polarization states along with better crosspolarization isolation (≥ 15 dB) in the operating bands and hence more suitable for modern wireless communications.

Sierpinski-Carpet Fractal Frequency Reconfigurable Microstrip Patch Antenna Design for Ku/K/Ka Band Application

“…Also, a significant increase in bandwidth is obtained upon switching the diode state. The proposed antenna is capable of being used for applications in the Ku band (12)(13)(14)(15)(16)(17)(18) and Ka band (26.5-40 GHz) in the diode OFF state and Ku, Ka, and K bands (18)(19)(20)(21)(22)(23)(24)(25)(26)(27) in the diode ON state. Out of these three bands, Ku band (also known as K-under band) is primarily used for satellite communication applications, and K band is employed for short-range applications while the Ka band (also known as K-above band) is targeted for radar and experimental communications.…”

“…Interesting and novel designs of frequency reconfigurable antennas capable of switching among four frequency bands are proposed in [13] and [14] providing multifunction operation. Polarization reconfigurable antennas also have an important role in several applications like remote sensing, tracking, and guiding owing to their ability to avoid fading losses [15]. One of the most challenging areas of antenna reconfigurability is to realize reconfigurable radiation patterns [16].…”

Polarization Agile Reconfigurable Rectangular Patch Antenna for Biomedical Applications

“…A 3D printed ultrawideband antenna system with stable impedance matching has been proposed in [9]. Polarization reconfigurable antennas are widely used due to their ability to switch polarization in real time [10]. The reconfigurable antennas have better cross polarization isolation and mitigate the multipath reception of signals, which improves signal quality.…”

Implementation and Validation of Parasitic Stub Integrated Reconfigurable Polarization in Antennas

“…The polarization recon gurability is achieved by using an L-shaped slot on the patch and T-bias devices with PIN diode con gurations which alters the polarization states between RHCP and LHCP in [9]. A single feed is used with a circular ring-shaped patch and a triangular patch with a PIN diode as a switching component to achieve polarization diversity in [10] and [11], respectively. The dual feed method with L-shaped parasitic patches is used to produce polarization diversity, and PIN diode con guration alters the polarization states between LP, LHCP, and RHCP [12].…”