Wideband Circular Polarized Dielectric Resonator Antenna Array for Millimeter-Wave Applications

Abstract

A novel circular polarized dielectric antenna array (DRA) for millimeter-wave applications at 30 GHz is presented in this paper. The unit element array is a flower-shaped DRA fed with a cross slot. To obtain circular polarization, a sequential network combined with the cross slots is used to feed the 2×2 array. The prototype of the proposed antenna array is fabricated and measured to obtain a wide resonance bandwidth from 27 GHz to 38 GHz frequency band. Furthermore, this left-hand polarized antenna array has achieved a peak gain of 9.5 dBi with 3-dB axial ratio at 30 GHz. The proposed DRA array with wideband resonance and gain bandwidth has the potential to be used for millimeter-wave wireless communications at the 30 GHz band.

A Review of Circularly Polarized Dielectric Resonator Antennas: Recent Developments and Applications

“…Several studies have been carried out to overcome this drawback. However, most of them focused on LP designs [73][74][75] and very little attention has been paid to the mm-wave CP DRA [76][77][78][79][80]. In [76], four parasitic dielectric resonator elements are sequentially rotated with a 90 • phase angle to achieve circular polarization, as shown in Figure 17.…”

“…wave CP DRA [76][77][78][79][80]. In [76], four parasitic dielectric resonator elements are sequentially rotated with a 90° phase angle to achieve circular polarization, as shown in Figure 17.…”

“…However, substrate-integrated antenna often leads to large leakage losses which depends on the separation of vias and holes. One of the popular methods to enhance impedance bandwidth, AR bandwidth, and gain of the proposed antenna is by integrating a SP feeding network into the antenna design [78]. The DRA using a SP feeding network is proposed in for the mm-wave application at 30 GHz.…”

Design Consideration, Challenges and Measurement Aspects of 5g Mm-Wave Antennas: A Review

“…19. The summary of cited circularly polarized state-of-the-art mm-Wave antenna works [81][82][83][84][85][86][87][88][89][90][91][92][93][94][95][96] are illustrated in Table 5.…”

Standing-Wave Feeding for High-Gain Linear Dielectric Resonator Antenna (DRA) Array

“…The utilization of antennas had to wait for a long time, until Long et al presented the first cylindrical dielectric resonator antenna (DRA) in 1983 [2]. Ever since then, dielectric antennas have been intensively studied as potential substitutions of traditional less efficient metal radiators, which have serious problems at high frequencies [3][4][5]. There are some metal antennas such as lens [6] and slot [7] antennas that can avoid such losses and provide high gain with high efficiency, but they still have the drawbacks of being bulky and complex, respectively.…”