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.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the authors present a system which allows to tune the coupling between a superconducting resonator and a transmission line, which allows capture, storage and on-demand release of microwaves at a tunable rate.
Abstract: We present a system which allows to tune the coupling between a superconducting resonator and a transmission line. This storage resonator is addressed through a second, coupling resonator, which is frequency-tunable and controlled by a magnetic flux applied to a superconducting quantum interference device. We experimentally demonstrate that the lifetime of the storage resonator can be tuned by more than three orders of magnitude. A field can be stored for 18 μs when the coupling resonator is tuned off resonance and it can be released in 14 ns when the coupling resonator is tuned on resonance. The device allows capture, storage, and on-demand release of microwaves at a tunable rate.
75 citations
TL;DR: In this article, a mesoscaled disc resonator comprised of micro-machined substantially thermally non-conductive wafer with low coefficient of thermal expansion for sensing substantially in-plane vibration is presented.
Abstract: An inertial sensor includes a mesoscaled disc resonator comprised of micro-machined substantially thermally non-conductive wafer with low coefficient of thermal expansion for sensing substantially in-plane vibration, a rigid support coupled to the resonator at a central mounting point of the resonator, at least one excitation electrode within an interior of the resonator to excite internal in-plane vibration of the resonator, and at least one sensing electrode within the interior of the resonator for sensing the internal in-plane vibration of the resonator. The inertial sensor is fabricated by etching a baseplate, bonding the substantially thermally non-conductive wafer to the etched baseplate, through-etching the wafer using deep reactive ion etching to form the resonator, depositing a thin conductive film on the through-etched wafer. The substantially thermally non-conductive wafer may comprise a silicon dioxide glass wafer, which is a silica glass wafer or a borosilicate glass wafer, or a silicon-germanium wafer.
75 citations
TL;DR: In this article, the authors used the dielectric resonator antenna (DRA) as a filtering device, named as the DRA filter, to improve the insertion loss of the filter part, the DR is toploaded by a metallic disk without significantly affecting the radiation efficiency of the antenna part.
Abstract: For the first time, the dielectric resonator antenna (DRA) is simultaneously used as a filtering device, named as the DRA filter (DRAF). The theory and design methodology of the DRAF are elucidated using the cylindrical DR. It was found that the operating frequency of the filter part can be made equal to, or different from, that of the antenna part. The return loss, input impedance, radiation patterns, and insertion loss of the DRAF are studied. To improve the insertion loss of the filter part, the DR is top-loaded by a metallic disk without significantly affecting the radiation efficiency of the antenna part. The disk, in addition, can be used to tune the frequency of the filter. It was found that the antenna and filter parts of the DRAF can be designed and tuned almost independently. A second-order DRAF is also designed in this paper. As the dual function DRAF is compact and cost effective, it should find applications in modern wireless communication systems.
75 citations
TL;DR: In this article, a narrow slot coupled to a microstrip line excites a DRA consisting of a small dielectric disc embedded in a larger disc is tested with two different slots providing eight different possibilities.
Abstract: A narrow slot coupled to a microstrip line excites a dielectric resonator antenna (DRA) consisting of a small dielectric disc embedded in a larger disc is built and tested. Two different configurations of DRAs are tested with two different slots providing eight different possibilities. One configuration provides a bandwidth over 50%. These antennas have broadside radiation patterns because of the symmetry presence of the slot with the DRA. Sample of radiation patterns are provided.
74 citations
01 Dec 2007
TL;DR: In this article, an internal dielectric transduced resonator is verified to achieve low impedance transduction of silicon bulk acoustic resonators at frequencies exceeding 10 GHz with a 2 dB improvement in transduction efficiency in its 9th harmonic relative to its 3rd harmonic.
Abstract: This paper presents experimental verification of frequency scaling in an internal dielectric transduced resonator. A silicon bar resonator is excited in its 3rd and 9th longitudinal harmonic modes at 1.53 and 4.51 GHz, respectively. The resonator demonstrates a 2 dB improvement in transduction efficiency in its 9th harmonic relative to its 3rd harmonic, normalized to the quality Q of the resonance. This result is in close agreement with theory, promising low- impedance transduction of silicon bulk acoustic resonators at frequencies exceeding 10 GHz.
74 citations