Reconfigurable Phased Array Antenna Consisting of High-Gain High-Tilt Circularly Polarized Four-Arm Curl Elements for Near Horizon Scanning Satellite Applications

Abstract

A 2×2 phased array consisting of beam reconfigurable four-arm Right Handed Circularly Polarized (RHCP) curl unit elements antenna is presented. This array is designed at test frequency of 5.2 GHz and can undertake a high-gain near-the-horizon scanning with low grating lobes. Each curl antenna element has four ports and can provide four RHCP tilted-beams ( = 48°) with a gain of 8.3 dBic. By switching the feeding ports, the curl element can reconfigure / switch these unit element beams in four different quadrants in space. The array exploits these high-gain high-tilt switchable beams for generating an extremely wide scanning range from-80° ≤  ≤ +80°. For the 2×2 array, in this range, the beam has a maximum gain of 12.4 dBic at  = 40°. More importantly, the array provides RHCP beams with a gain of 10.5 dBic at near-the-horizon angles of  ≈ 70° and provides a lower gain of 6.5 dBic in the zenith direction. This has promising applications in Communications On The Move (COTM) using Flat Panel Antenna (FPA) to Geosynchronous Orbit (GSO) satellites. Here, when operating at high latitudes require high-gain at near-the-horizon angles.

Dual‐curl antennas for broadband circular polarisation

“…The purpose of this letter is to propose a novel dual-wire antenna showing wideband CP radiation. For this, we use a curl element [6][7][8], which is known as a simplified version of a single-arm spiral. The antenna is composed of horizontal curl elements and vertical parallel feedlines above the ground plane and analysed using the moment method [9].…”

A novel low‐cost beam‐controlling antenna based on digital coding metasurface

“…To manipulate the electric field distribution, the DCMS should be placed in the induction near-field of the source antenna. The boundary between the induction near-field and Fresnel region is taken as the original value of h 1 which is calculated as (5).…”

“…These techniques fall into two categories. The first type of techniques is implemented by passive or active phased arrays that require phase shifters 1–10 . Among them, some load switches on antennas, 6–8 and some adopt phase gradient surface 9 or lens 10 to realize wider angle beam‐scanning.…”

“…The first type of techniques is implemented by passive or active phased arrays that require phase shifters. [1][2][3][4][5][6][7][8][9][10] Among them, some load switches on antennas, [6][7][8] and some adopt phase gradient surface 9 or lens 10 to realize wider angle beam-scanning. Phased array antenna has the advantages of flexible beam-controlling, wide-angle beam-scanning and high reliability, but the disadvantages of high cost and high profile are also obvious which limit its application in wireless communication systems requiring miniaturized antennas.…”

A Circularly Polarized Low-Cost Flat Panel Antenna Array With a High Impedance Surface Meta-Substrate for Satellite On-the-Move Medical IoT Applications

“…1×3 QACH ANTENNA ARRAY Previously, [27] has developed a C-band 2×2 quad-arm curl antenna array, albeit without the key size benefits of an HIS and the vital low-cost implementation presented here. An L-band 2×2 QACH array configuration would be physically sizable (332 × 332 mm) even with the application of an HIS.…”