Wideband Circularly Polarized Magneto-Electric Dipole $1\times2$ Antenna Array for Millimeter-Wave Applications

Abstract

A novel wideband circularly polarized (CP) magneto-electric (ME) dipole 1 × 2 antenna array for millimeter-wave applications is presented in this paper. The magneto-electric dipole of a single radiator is designed by combining a pair of loaded short-circuited metallic patches acting as electric dipole with a bowtie-shape aperture and a pair of vertical metallic posts functioned as a magnetic dipole. The pair of metallic patches is fed by the bowtie-shape aperture etched on the top surface of shorted-end substrate integrated waveguide (SIW). By chamfering and adding perturbation on each rectangular patch, the proposed ME dipole antenna realizes circular polarization radiation. Measured results show that the proposed single radiator has an impedance bandwidth of 27.1% (24.29 to 31.9GHz) for S11<-10dB, an axial-ratio (AR) bandwidth of 9.7% (27.4 to 30.2GHz) for AR<3dB, and a stable gain of 7dBic. In order to extend AR bandwidth, the array antenna is implemented in a 1 × 2 arrangement and fed by a complementary SIW power distribution phase shifter. The proposed antenna has a simple structure and can be realized by PCB process, which is very convenient for mass production. Measured results demonstrate that the proposed 1 × 2 antenna array has a wide impedance bandwidth of 25% for S11<-10dB, a stable gain of 10dBic and an axial-ratio bandwidth of 24.7% for AR<3dB, which is 2.4 times higher than the 3-dB AR bandwidth of a single radiator. INDEX TERMS Circularly polarized, magneto-electric dipole, wideband, perturbation, chamfer.

A Wideband Circularly Polarized Magnetoelectric Dipole Antenna for 5G Millimeter-Wave Communications

“…It can be seen from the table that the proposed antenna demonstrated outstanding performance in terms of overall size, AR bandwidth, and peak gain. Many interesting designs of CP antennas based on ME dipole structure have been reported [ 8 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 ]. The proposed antenna is the smallest among its competitors with comparable gain and CP bandwidth.…”

“…Although the design developed in [ 22 ] offers a very wide AR bandwidth due to its novel feeding mechanism, it has limited gain and 3D geometry with a high antenna profile. The CP ME antenna arrays offer wideband and high gain due to their increased number of radiating elements, which, of course, increases the antenna size and complex feeding networks [ 23 , 24 , 25 ]. It is noted that our antenna consists of a single element and has a stable gain (average 8 dBic) with a deviation of only ±0.5 dBic.…”

“…This design has a high antenna profile (33.3 mm antenna height) and limited gain (6.6 dBic). A wideband circularly polarized ME dipole array fed by a complementary SIW power distribution phase shifter was presented [ 23 ]. The single-element antenna gain was 7dBic, while the AR bandwidth was restricted to 9.7%.…”

Variable Diagonal Loading Based Robust Concentric Hexagonal Antenna Array With Low Side Lobe Level Using Tapering Windows

“…In this paper, tapering windows are exploited to reduce the SLL of CHAA and analyze the performance. Experimental analysis with an antenna prototype of planner and circular polarized dipole antenna array for wireless communication is shown in [30][31][32]. So we can say that it is feasible to implement our proposed CHAA in practical application.…”

Wideband circularly polarized millimeter‐wave metasurface antenna array feed by SIW

“…1 In the recent years, circularly polarized (CP) antennas have been extensively studied. For example, CP dielectric resonant antennas, 2 CP microstrip antennas, 3,4 CP cavitybacked antennas, 5 CP magneto-electric (ME) dipole antennas, [6][7][8] and CP metasurface (MS) antennas, 9 Although these CP antennas achieved bidirectional, multi-frequency and other characteristics, their bandwidths are relatively narrow and their structures are complex, which are not easily fabricated.…”