Inverted L-Shaped CP Patch Antenna with Corner-Truncated Partial Ground Plane Diagonally Adjoined with Square Branch for L-Band Applications.

Phanuphong Boontamchauy,Titipong Lertwiriyaprapa,Chuwong Phongcharoenpanich

doi:10.3390/s21041085

Abstract

This research proposes an inverted L-shaped patch antenna with a corner-truncated partial ground plane diagonally adjoined to a square branch for L-band applications. The adjoining square branch was used to perturb linear polarization for circular polarization, and the corner-truncated partial ground plane was utilized to enhance the axial ratio bandwidth (ARBW). Simulations were performed, an antenna prototype was fabricated, and experiments were carried out. The simulation and measured results were in good agreement. The proposed antenna could achieve an ARBW of 77.87% (1.09–2.48 GHz). The novelty of this research lies in the concurrent use of a square branch and a corner-truncated partial ground plane to realize wide ARBW in an L-band, rendering the technology suitable for satellite communication and navigation applications.

Highlights

In [8], slits were cut into the circular patch to perturb linear polarization (LP) for circularly polarized (CP) generation, and the proposed method could achieve a 4.92% return loss bandwidth (RLBW) (1.011–1.062 GHz) and 2.40% axial ratio bandwidth (ARBW) (1.028–1.053 GHz)
These findings reveal that LP perturbation by manipulating the radiating patch can achieve a very narrow ARBW
The findings showed that the concurrent use of an inverted L-shaped microstrip and adjoining branch effectively enhanced the ARBW of single-fed circularly polarized patch antennas (SCPA)

Summary

Introduction

With the exponential growth in smart wireless devices, compact and low-cost microstrip antennas, especially circularly polarized (CP) patch antennas, are increasingly being deployed in a wide range of devices and applications, such as radio frequency identification (RFID), near-field communication (NFC), wireless local area network (WLAN), and global navigation satellite system (GNSS). Antenna polarization indicates the direction of electric field vectors in the time domain at a fixed position in space. There are two types of polarization: linear polarization and circular polarization [1]. Circular polarization consists of two linear components of electric field that are perpendicular to each other and equal in magnitude, but have a 90◦ phase difference. The electric field rotates in a circle around the direction of propagation [1]

Methods

Results

Conclusion