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Proceedings ArticleDOI

A Miniaturized Wide Beamwidth Dielectric Resonator Antenna

18 Aug 2021-
TL;DR: In this paper, a miniaturized wide beamwidth dielectric resonator antenna is presented to enhance the phase delay between the different positions on the same aperture, where metal patches are attached on the side walls of concave structure to miniaturize the antenna.
Abstract: A miniaturized wide beamwidth dielectric resonator antenna is presented. The wedge-shaped concave structure is introduced to enhance the phase delay between the different positions on the same aperture. Some metal patches are attached on the side walls of concave structure and the top of dielectric resonator antenna to miniaturize the antenna. The resonant frequency of the proposed antenna can be reduced by 26.2%, with excellent half-power beamwidth performance of 165.4° and 179.8° in the E- and H-planes at 24 GHz, respectively.
References
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Journal ArticleDOI
TL;DR: In this paper, the authors present a historical review of the research carried out on dielectric resonator antennas (DRAs) over the last three decades and highlight major research activities in each decade.
Abstract: This article presents a historical review of the research carried out on dielectric resonator antennas (DRAs) over the last three decades. Major research activities in each decade are highlighted. The current state of the art of dielectric-resonator-antenna technology is then reviewed. The achievable performance of dielectric resonator antennas designed for compactness, wide impedance bandwidth, low profiles, circular polarization, or high gain are illustrated. The latest developments in dielectric-resonator-antenna arrays and fabrication techniques are also examined.

494 citations

Journal ArticleDOI
TL;DR: In this article, a wide-beam microstrip antenna with metal walls is proposed to improve the wide-angle scanning performance of the phased array antennas, and the beamwidth of the antenna is broadened by the horizontal current on the radiating patch and the vertical currents on the metal walls.
Abstract: In order to improve the wide-angle scanning performance of the phased array antennas, a wide-beam microstrip antenna with metal walls is proposed in this letter. The beamwidth of the antenna is broadened by the horizontal current on the radiating patch and the vertical current on the metal walls. The half-power beamwidth of the E- and H-planes is 221° and 168° at 4.0 GHz. Furthermore, the wide-beam antenna element is employed in a nine-element E-plane linear array antenna. The main beam of the E-plane scanning linear array antenna can scan from −70° to +70° in the frequency band from 3.7 to 4.3 GHz with a gain fluctuation less than 2.7 dB and variation in maximum sidelobe level less than −5.8 dB. The E-plane scanning linear array antenna with nine elements is fabricated and tested. The measured results achieve a good agreement with the simulated results.

78 citations

Journal ArticleDOI
TL;DR: In this article, a single-feed circularly-polarized (CP) wide beam microstrip antenna is proposed for CNSS application, which is designed with a double-layer structure, comprising a circular patch with two rectangular stubs along the diameter direction and a parasitic ring right above it.
Abstract: A compact single-feed circularly-polarized (CP) wide beam microstrip antenna is proposed for CNSS application. The antenna is designed with a double-layer structure, comprising a circular patch with two rectangular stubs along the diameter direction and a parasitic ring right above it. The resonance frequency and the CP characteristics are mainly controlled by the circular patch and the rectangular stubs, respectively. The vertical HPBW (half power beam width) could be widened by the parasitic ring. Experimental results show that the measured vertical HPBW is approximately 140° and the measured out-of-roundness for the horizontal radiation pattern is only 1.1 dB. Besides, it could maintain good low-profile characteristics.

68 citations

Journal ArticleDOI
TL;DR: In this paper, the fundamental broadside TM110 mode of an aperture-coupled circular dielectric resonator antenna was studied and the return loss, radiation characteristics, antenna gain and beamwidth of the configuration were measured and discussed.
Abstract: The fundamental broadside TM110 mode of an aperture-coupled circular dielectric resonator antenna is studied. By using high-dielectric-constant material, the DR antenna can be made low-profile with a relatively low resonant frequency. The return loss, radiation characteristics, antenna gain and beamwidth of the configuration are measured and discussed.

49 citations

Journal ArticleDOI
TL;DR: By covering a cylindrical dielectric resonator antenna with a metallic cap, the resonant frequency of the antenna can be reduced by 30.6% as discussed by the authors, which finds applications in designing small antennas for wireless communication systems.
Abstract: By covering a cylindrical dielectric resonator antenna with a metallic cap, the resonant frequency of the antenna can be reduced by 30.6%. The result finds applications in designing small antennas for wireless communication systems.

49 citations