Topic
Dielectric resonator antenna
About: Dielectric resonator antenna is a research topic. Over the lifetime, 8199 publications have been published within this topic receiving 111090 citations. The topic is also known as: DRA.
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TL;DR: In this paper, a multiband dielectric resonator (DR) antenna with dual-band circularly polarized (CP) response is proposed, which achieves a measured 3 dB axial ratio (AR) bandwidth of 19.98% in lower band and 3.07% in upper band.
Abstract: A multiband dielectric resonator (DR) antenna is proposed with dual-band circularly polarized (CP) response. This antenna consists of an inverted-sigmoid shaped DR. A metallic strip is applied at the surface of the DR to achieve the circular polarization. The fundamental and higher order hybrid modes are excited in the antenna structure because of the specific geometry. The antenna with dual-band CP response provides the measured 3 dB axial ratio (AR) bandwidth of 19.98% in the lower band and 3.07% in the upper band. The upper band 3 dB AR response can be tuned in different 10 dB impedance passbands of the antenna by changing the location and width of the metallic strip. Antenna response can also be tuned to obtain the triple band CP operation.
60 citations
TL;DR: In this article, the response of a dielectric resonator excited by either interior volume sources or incident exterior waves is investigated, and special attention is devoted to phenomena at resonace, and in particular to the induced electric and magnetic dipoles.
Abstract: The response of a dielectric resonator excited by either interior volume sources or incident exterior waves is investigated. Special attention is devoted to phenomena at resonace, and in particular to the induced electric and magnetic dipoles. Simple formulas are obtained for the scattering cross section. The material of the resonator is assumed lossless and of very high permittivity.
60 citations
TL;DR: In this article, a pre-stretched dielectric elastomer (DE) membrane is employed to tune the acoustic properties of each resonator, and the resulting attenuation band can be tuned by varying the applied voltage to the DE membranes, showing promising potentials for adaptive sound control devices for ventilation systems and other engineering applications.
60 citations
TL;DR: In this article, a single-fed wide dual-band circularly polarized (CP) dielectric resonator antenna (DRA) is presented, which is excited by a microstrip line through the narrow underneath rectangular aperture.
Abstract: A new single-fed wide dual-band circularly polarized (CP) dielectric resonator antenna (DRA) is presented in this letter. The DRA is excited by a microstrip line through the narrow underneath rectangular aperture, and its HE
111
and HE
11δ
(2 <; δ <; 3 ) modes are utilized for the dual-band design. To achieve CP fields, two notches are truncated from the cylindrical DRA at φ = 45
°
and 225 °
. A pair of equal arc-shaped slots are used to improve the axial-ratio (AR) and impedance bandwidths. The antenna features impedance bandwidths (|S
11
| <; -10 dB ) of 26.25% and 11.17%, and 3-dB AR bandwidths of 15.8% and 5.02% in the lower and upper bands, respectively. To verify the simulation, the antenna is designed and measured. Reasonable agreement between measured and simulated results is obtained.
60 citations
TL;DR: In this paper, a differentially fed rectangular dielectric resonator antenna (DRA) was studied using the finite-difference time-domain (FDTD) method, and the effects of magnitude and phase imbalances on the DRA impedance and radiation pattern were investigated.
Abstract: A differentially fed rectangular dielectric resonator antenna (DRA) is studied using the finite-difference time-domain (FDTD) method. The fundamental TE111 mode of the rectangular DRA is excited at 2.4 GHz, with a 10-dB differential impedance bandwidth (|Sdd11| < -10 dB) of ~10.4%. To verify the theory, measurements were carried out, and reasonable agreement between theory and experiment is obtained. The effects of the magnitude and phase imbalances on the DRA impedance and radiation pattern are investigated.
60 citations