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This paper proposes a new solution for realizing a pattern reconfigurable dielectric resonator antenna (DRA) using liquid injection to the 3D-printed container. The proposed methodology solves the existing problems of PIN-diode type reconfigurable antennas in narrow bandwidth and low radiation efficiency. The proposed DRA successfully demonstrates how to manipulate HEM01δ and TM01δ modes with broadside...
In this letter, a novel high-isolation 35/94-GHz dual-frequency orthogonal Cassegrain antenna is designed. The antenna consists of a D = 800 mm main reflector, a subreflector, and a dual-band orthogonal-polarization feed. In order to get similar feed horn's E–H radiation patterns and similar phase center positions at the dual frequencies separately, the dual-mode conical horn is designed in the feed...
A pattern reconfigurable dielectric resonator antenna (DRA) is investigated in this paper. In the design, a dielectric liquid called ethyl acetate is introduced as the radiator of the DRA. Therefore, a container is fabricated by 3D printing technology for the liquid DRA. The reconfigurability is achieved by pumping the ethyl acetate in and out to the 3D printed container. For demonstration, the antenna...
A compact monopolar patch antenna is presented in this paper. The antenna has a wide bandwidth and a monopole-like radiation pattern. To reduce the whole size of the antenna, a substrate with high dielectric constant is adopted. Besides, three types of shorting pins and a triangle slot are added to the patch to widen the impedance bandwidth. The proposed antenna operates from 2.29 to 2.59 GHz for...
This paper introduces several emerging reconfigurable antenna elements for modern broadband wireless communication systems. Firstly, we will present a broadband uni-directional circular polarization (CP) reconfigurable antenna consisting of four planar monopole radiators and an broadband output phase reconfigurable feeding network. Switchable left-handed circular polarization (LHCP) and right-handed...
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