Analytic study on CP enhancement of millimeter wave DR and patch subarray antennas

Abstract

This article presents a comparative analysis for the performance of single, 2 × 2, and 4 × 4 dielectric resonator (DR) and patch circularly polarized (CP) antenna subarrays at 30 GHz. In order to enhance the CP bandwidth, the subarray elements are fed by two kinds of sequential feeding techniques using parallel and hybrid ring feeds. The 4 × 4 patch antenna subarrays fed by parallel and hybrid ring feeding networks are fabricated and tested. Measurements show acceptable agreement with simulation results. The experimental results show a bandwidth of 36.9% for both (−10 dB) impedance matching and (3 dB) axial ratio CP patterns for the patch subarray antenna with hybrid ring feeding. For the parallel feeding, the corresponding bandwidth is 28.81%. The proposed antennas combine desirable features such as wide impedance and AR bandwidths, low profile, and easiness of fabrication and therefore is a good candidate for millimeter wave systems around 30 GHz.

CP Antenna Array With Switching-Beam Capability Using Electromagnetic Periodic Structures for 5G Applications

“…5(a) all the parameter values for realizing the feed, carefully optimized to obtain a sequential feeding at 30 GHz, are shown. The feeding network is based on the models presented in [2] and [24]. In this work, one novelty consists in the fact that the array is fed by a coaxial feed in one location while the models presented in [2] and [24] are based on microstrip line feeding.…”

“…The feeding network is based on the models presented in [2] and [24]. In this work, one novelty consists in the fact that the array is fed by a coaxial feed in one location while the models presented in [2] and [24] are based on microstrip line feeding. This novel approach minimizes the antenna length and the cost without any decrease in performance.…”

“…For some MM-wave applications, such as 5G applications, broadband high-gain antennas with circular polarization are preferable because of their ability to resist to multipath effects, polarization mismatch and weather conditions (i.e. rain or snow) [1], [2].…”

“…Various methods can be used for realizing a CP beam antenna. A first technique employs polarizers [2], [3]. If a multilayer configuration [4] is used, then a wide bandwidth can be obtained but both the losses and length of the antenna are increased because of the additional element, the polarizer.…”

A Dual Circularly Reconfigurable Polarization Patch Antenna for Fifth Generation Mobile Communication Systems

“…Furthermore, these antennas have diverse polarization and can switch to right/left hand circular polarization (RHCP and LHCP), two horizontal and vertical linear polarizations, and elliptical polarizations [11][12][13]. Several circularly polarized antennas have been recommended for operation in 5G mobile systems [14][15][16][17]. The weakness of these antennas is static on the type of circular polarization.…”