Strip-fed shaped dielectric resonator antenna for improved radiation characteristics through mode filtering

Abstract In this article, the design of a radiation beam-reconfigurable antenna using the reflector pins is presented. The reflector pins make a short or open connection with the ground, via switches and Plated Through Hole (PTH), which helps in controlling radiation characteristics of the proposed antenna. This design contains a simple 3D printed Cylindrical Dielectric Resonator Antenna that is located at the center of the substrate. The beam-sweeping of the antenna is attained by operating switches in different combinations of ON and OFF states. The reconfigurable CDRA operates at 4.5 GHz and covers all azimuth angles in four steps with a maximum measured gain of 6.6 dBi. This beam-switching antenna is very advantageous because of its trait of eliminating fade zones and beamforming.

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Novel Wideband Circularly Polarized DRA With Squint-free Radiation Characteristics

10.21203/rs.3.rs-124574/v1 ◽

2020 ◽

Author(s):

Mohammad Abedian ◽

Mohsen Khalily ◽

Vikrant Singh ◽

Pei Xiao ◽

Rahim Tafazolli ◽

...

Keyword(s):

Dielectric Resonator ◽

Vertical Section ◽

Axial Ratio ◽

Impedance Bandwidth ◽

Dielectric Resonator Antenna ◽

Radiation Characteristics ◽

Horizontal Section ◽

Circularly Polarized ◽

Metal Element ◽

Coaxial Probe

Abstract A new single-fed circularly polarized dielectric resonator antenna (CP-DRA) without beam squint is presented. The DRA comprises of an S-shaped dielectric resonator (SDR) with a metalized edge and two rectangular dielectric resonator (RDRs) blocks. A horizontal-section is applied as an extension of the SDR, and a vertical-section is placed in parallel to the metallic edge. A vertical coaxial probe is used to excite the SDR and the vertical RDR blocks through an S-shaped metal element and a small rectangular metal strip, respectively. The two added RDRs that form an L-shaped DR improve the radiation characteristics and compensate for the beam squint errors. A wideband CP performance is achieved due to the excitation of several orthogonal modes such as TEx d11, TEy 1d1, TEz 121, TEy 112, TEx 131, and TEy 311. The experimental results demonstrate an impedance bandwidth of approximately 66:8% (3:71-7:45 GHz) and a 3-dB axial-ratio (AR) bandwidth of about 54:8% (3:72-6:53 GHz) with a stable broadside beam achieving a measured peak gain of about 4:64dBi. Furthermore, a 100% correction in beam squint value from q = 41° to q = 0° with respect to the antenna boresight is achieved.

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T-Shaped Compact Dielectric Resonator Antenna for UWB Application

Advanced Electromagnetics ◽

10.7716/aem.v8i3.1077 ◽

2019 ◽

Vol 8 (3) ◽

pp. 57-63

Author(s):

A. Zitouni ◽

N. Boukli-Hacene

Keyword(s):

Dielectric Resonator ◽

Ground Plane ◽

Ultra Wideband ◽

Impedance Bandwidth ◽

Dielectric Resonator Antenna ◽

Printed Antenna ◽

Frequency Range ◽

Radiation Characteristics ◽

Antenna Structure ◽

Antenna Performance

In this article, a novel T-shaped compact dielectric resonator antenna for ultra-wideband (UWB) application is presented and studied. The proposed DRA structure consists of T-shaped dielectric resonator fed by stepped microstrip monopole printed antenna, partial ground plane and an inverted L-shaped stub. The inverted L-shaped stub and parasitic strip are utilized to improve impedance bandwidth. A comprehensive parametric study is carried out using HFSS software to achieve the optimum antenna performance and optimize the bandwidth of the proposed antenna. From the simulation results, it is found that the proposed antenna structure operates over a frequency range of 3.45 to more than 28 GHz with a fractional bandwidth over 156.12%, which covers UWB application, and having better gain and radiation characteristics.

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