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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
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Journal ArticleDOI
TL;DR: In this paper, a dielectric resonator excited by a coaxial probe and designed for an omni-directional pattern is considered, and the effect of antenna parameters such as dielectrics constant and probe length is investigated.
Abstract: A dielectric resonator excited by a coaxial probe and designed for an omni-directional pattern is considered. Combining two dielectric resonators of different dielectric material with each other enhances bandwidth. The effect of antenna parameters such as dielectric constant and probe length are investigated. The analysis is performed numerically, using the method of moments and verified by the FDTD method. The agreement between the two methods is excellent. A 45% bandwidth is achieved with this structure. © 2002 Wiley Periodicals, Inc. Microwave Opt Technol Lett 35: 425–428, 2002; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.10628

48 citations

Patent
Masako Tanaka1
02 Mar 2005
TL;DR: In this paper, a piezoelectric resonator element with a thickness shear vibration as a main vibration, a first groove and a second groove formed so as to surround the center part of a main surface, and the thickness at the first and second groove structured to be between 70% to 96%, inclusive of the thickness of the resonator part.
Abstract: Exemplary embodiments provide a piezoelectric resonator element, to reduce the reaching of an attenuating vibration of a main vibration to a marginal edge of the piezoelectric resonator element, as well as to stabilize an oscillating-frequency without worsening the CI value, nor inducing another vibration mode. The piezoelectric resonator element having a thickness shear vibration as a main vibration, a first groove and a second groove formed so as to surround the center part of a main surface, and the thickness at the first groove and the second groove structured to be between 70% to 96%, inclusive, of the thickness of the center part of the resonator element.

48 citations

Patent
07 Nov 1983
TL;DR: In this article, a tuning slug is located within a nonhermetic chamber at the end of a screw threaded into a tapped hole through a wall of the non-hermetic chambers serving also as an outer wall of a housing enclosing both chambers.
Abstract: Microwave dielectric resonator apparatus which, for example, may be a microwave oscillator frequency stabilized by a dielectric resonator or may be a microwave filter whose critical frequency is determined by a dielectric resonator, has the dielectric resonator environmentally protected in a hermetic chamber. As the hermetic integrity of the chamber would be destroyed by having a tuning slug therein at the end of a screw threaded into a tapped hole through a chamber wall for rotation by a screwdriver outside the chamber, the tuning slug is instead located within a non-hermetic chamber at the end of a screw threaded into a tapped hole through a wall of the non-hermetic chamber serving also as an outer wall of a housing enclosing both chambers. The chambers have an interface which is transparent to microwave fields and proximate the dielectric resonator and tuning slug. The interface preserves the hermetic integrity of the hermetic chamber and transmits part of the microwave field developed by the dielectric resonator, when it resonates, to the non-hermetic chamber to be variously interfered with by the tuning slug as the slug is moved by rotation of the screw into different positional relationships of interference with the transmitted field part. As known per se, such interference alters the distribution and amount of microwave energy stored in the resonating dielectric resonator, and thereby alters the microwave frequency at which the dielectric resonator resonates. By using a puck of barium titanate as the dielectric resonator, a resonant frequency of 12 gigahertz is typically obtainable with a range of stable adjustment thereabout in the vicinity of 20 megahertz.

48 citations

Journal ArticleDOI
TL;DR: In this paper, a compact differential hollow dielectric resonator antenna (DRA) is investigated, where the hollow DRA is fed by two identical conducting strips connected to the outputs of an underlaid 180° hybrid coupler (rat-race).
Abstract: In this letter, a compact differential hollow dielectric resonator antenna (DRA) is investigated. The hollow DRA is fed by two identical conducting strips connected to the outputs of an underlaid 180° hybrid coupler (rat-race). With this compact configuration, loss of the feed network can be minimized and, thus, the differential gain can be made about the same as for the single-ended case. By using the differential feed, the DRA can be integrated with differential integrated circuits directly. Also, its cross-polarized fields are generally weaker than those of the single-ended version. The reflection coefficient, radiation pattern, and antenna gain of the proposed differential DRA are simulated, and the result agrees reasonably with our measurement.

48 citations

Patent
03 Nov 1999
TL;DR: In this paper, a broadband, miniaturized, slow-wave antenna for transmitting and receiving radio frequency (RF) signals is described, which consists of a dielectric substrate with a traveling wave structure mounted on one surface, and a conductive surface member mounted on the opposite surface.
Abstract: Disclosed is a broadband, miniaturized, slow-wave antenna (100) for transmitting and receiving radio frequency (RF) signals. The slow-wave antenna comprises a dielectric substrate (106) with a traveling wave structure mounted on one surface, and a conductive surface member (109) mounted on the opposite surface. The traveling wave structure, for example, is of the broadband planar type such as various types of spirals and includes conductive arms (123) which are coupled to feed lines (113) which are routed through the dielectric substrate and the conductive surface member for connection to a transmitter or receiver. The dielectric substrate is of a predetermined thickness which is, for example, less than 0.04μ1, where μ1 is the free space wavelength of the lowest frequency fl of the operating frequency range of the slow-wave antenna. Also, the dielectric constant of the dielectric substrate and the conductivity of the surface member are specified, along with the thickness of the dielectric substrate to ensure that a slow-wave launched in the traveling wave structure is tightly bound to the traveling wave structure, but not so tightly bound as to hinder radiation at a radiation zone of the traveling wave structure, while minimizing any propagation loss. The slow-wave antenna has a reduced phase velocity, which reduces the diameter of the radiation zone and, consequently, reduces the diameter of the slow-wave antenna.

48 citations


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