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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.


Papers
More filters
Journal ArticleDOI
TL;DR: In this article, the vertical displacement of a columnar fluidic colloidal dispersion was examined as a frequency reconfigurable dielectric resonator antenna (DRA), and the coaxial probe-fed structure has tunable impedance properties that are reversibly controlled by adjusting the columnar height of the dispersion.
Abstract: The vertical displacement of a columnar fluidic colloidal dispersion is examined as a frequency reconfigurable dielectric resonator antenna (DRA). The coaxial probe-fed structure has tunable impedance properties that are reversibly controlled by adjusting the columnar height of the dispersion. Colloidal barium strontium titanate was dispersed in hydrotreated naphthenic oil and placed at several heights into a section of polycarbonate tubing over an aluminum ground plane to demonstrate the impedance properties of this structure. Measured, simulated, and calculated results for a range of heights that corresponded to single-mode operation are provided for a design operating between 2.5 and 4.5 GHz.

60 citations

Patent
27 Feb 2003
TL;DR: In this article, a method for varying the resonance frequency of a resonator beam is described, where the resonator is suspended above a substrate by the first end and the second end.
Abstract: A method for varying the resonance frequency of a resonator beam is disclosed. The method comprises first manufacturing a resonator beam having a first end and a second end. The resonator beam is suspended above a substrate by the first end and the second end. At least one end of the resonator beam is connected to an actuator that applies an actuation force to the resonator beam to apply tensile strain or compressive strain onto said resonator beam. By varying the amount of actuation force, the resonance frequency of the resonator beam may be tuned. Additionally, by varying the magnitude and direction of the actuation force, the resonator beam may be used as a temperature sensor or a temperature compensated resonator.

59 citations

Journal ArticleDOI
TL;DR: In this paper, a circularly polarised, rectangular, low profile, dielectric-resonator antenna is presented which is fed by a 50/spl Omega/ microstrip line through a single aperture.
Abstract: A circularly polarised, rectangular, low-profile, dielectric-resonator antenna is presented which is fed by a 50/spl Omega/ microstrip line through a single aperture. The measured 3dB axial-ratio bandwidth in the boresight direction is 14.35-14.80 GHz (3%). At 14.75 GHz, the input |s/sub 11/| is -28 dB; the measured pattern in one elevation plane decreases with increasing /spl theta/ but the axial ratio is close to 3 dB over 110/sup c/; in the orthogonal elevation plane, the axial ratio increases more rapidly with /spl theta/.

59 citations

Journal ArticleDOI
TL;DR: In this paper, a new trough-shaped air cavity has been introduced in the ground plane just beneath the DRA to simulate a special boundary condition, which enunciates desired modal fields.
Abstract: Higher-order HEM12δ mode has been experimentally realized in a cylindrical dielectric resonator antenna (CDRA) very recently revealing broadside radiation like the dominant HEM11δ mode. The primary challenge is the excitation of the mode in a practical DRA sitting on a metal ground plane, which was first resolved by introducing a floating feed as an equivalent current ribbon. In this letter, yet another technique has been explored using a conventional probe-fed CDRA placed on a metal plate. Only a new trough-shaped air cavity has been introduced in the ground plane just beneath the DRA to simulate a special boundary condition, which enunciates desired modal fields. Such a technique may be improvised for other potential applications. The proposed concept has been verified using both simulated and experimental results.

59 citations

Journal ArticleDOI
Jin Xu1, Chen Miao1, L. Cui1, Yu-Xue Ji1, Wen Wu1 
TL;DR: In this paper, a compact quad-band bandpass filter utilizing the proposed quad-mode resonator is presented, which has four tunable symmetrical resonant poles, can be treated as a two-side open-circuit stepped-impedance resonator with shortcircuit stubs in its low-IMpedance sections, and transmission zeros among each passband are generated to improve passband selectivity and achieve high isolation.
Abstract: A compact quad-band bandpass filter utilising the proposed quad-mode resonator is presented. The proposed resonator, which has four tunable symmetrical resonant poles, can be treated as a two-side open-circuit stepped-impedance resonator with short-circuit stubs in its low-impedance sections. With the multi-paths propagation mode configuration of the two resonators, transmission zeros among each passband are generated to improve passband selectivity and achieve high isolation. As an example, a quad-band bandpass filter centring at 1.9/2.8/4.3/5.2GHz is designed, fabricated and measured. The measurement results agree well with the full-wave EM simulated responses.

59 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023101
2022273
2021181
2020224
2019254
2018247