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
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IBM1
TL;DR: In this paper, the beat frequencies between modes of an optical resonator with concave mirrors have been studied by the photomixing technique using Lasers operating on the 6328 A He-Ne transition.
Abstract: The beat frequencies between modes of an optical resonator with concave mirrors have been studied by the photomixing technique. Lasers operating on the 6328 A He–Ne transition were used. The results agree well with theory. Removal of degeneracy by resonator irregularities and mode repulsion effects have been observed. The technique of partially blocking the external laser beam in order to observe all the beat frequencies is pointed out.
67 citations
Patent•
15 Aug 2006TL;DR: In this article, an antenna comprising a first dielectric resonator antenna operating within a first frequency band, a second Dielectric Resonator antenna operative within a second frequency band and a feeding structure electrically coupled to the first and second dielectoric resonator antennas was provided.
Abstract: Provided is an antenna comprising a first dielectric resonator antenna operative within a first frequency band, a second dielectric resonator antenna operative within a second frequency band, and a feeding structure electrically coupled to the first and second dielectric resonator antennas to receive and transmit signals at the first and second frequency bands through the first and second dielectric resonator antennas.
67 citations
TL;DR: In this article, the authors investigated the feasibility of using dielectric materials as microwave resonators in a narrow-band bandpass filter operating in the 2200 to 2300 MHz telemetry band.
Abstract: The miniaturization of high-Q resonant microwave structures is of great importance. This must he done to keep pace with the size reduction of other related components. The need has led to an investigation into the feasibility of using dielectric materials as microwave resonators. This paper deals with the application of the TiO/sub 2/ dielectric resonator in a narrowband bandpass filter operating in the 2200 to 2300 MHz telemetry band. The study confirms the theory that a bandpass filter employing dielectric resonators is practical to build, is compact, and will approach the performance of an equivalent waveguide filter. The design employed five resonators mounted in a cylindrical tube that was 1.4 inches in diameter by 4.3 inches long and weighed 4.6 ounces. An equivalent waveguide filter would be approximately 2.3x4.5x16 inches long and would weigh approximately 64 ounces (WR-430). The thermal sensitivity of the dielectric resonator employing TiO/sub 2/ is an inherent problem and oven regulation for narrowband applications will be required. Small, inexpensive thermal jackets are available that will control the filter stability to a value equal to, or better than, that obtained with a filter utilizing aluminum cavities operating in a typical uncontrolled temperature environment.
66 citations
TL;DR: In this article, a circularly polarized Spidron fractal dielectric resonator antenna is presented, which has a 3-dB axial ratio (AR) bandwidth.
Abstract: In this letter, a circularly polarized Spidron fractal dielectric resonator antenna is presented. A wide 3-dB axial ratio (AR) bandwidth is realized by merging a Spidron fractal dielectric resonator and a C-shaped slot that can produce circular polarization. The proposed antenna is excited through the coupling between a C-shaped slot in the ground plane and a ${\hbox {50-}} \Omega $ microstrip feeding line. A prototype of the antenna is fabricated and tested. Reasonable agreement is achieved between the measurement and simulation. The experimental results show that the proposed antenna has a $-$ 10- $\hbox{dB}$ reflection bandwidth of 37.29% (4.32–6.30 GHz) and a 3-dB AR bandwidth of 11.57% (5.13–5.76 GHz). The measured gain of the antenna ranges 2.20 dBic to 3.16 dBic within the AR bandwidth.
66 citations
26 Apr 2011
TL;DR: A curved dual-band dielectric resonator antenna for RFID applications is proposed, designed to operate at 2.25– 2.55 GHz and 5.8 GHz bands.
Abstract: This paper presents a new application of dielectric resonator antenna in radio frequency identification system. A curved dual-band dielectric resonator antenna for RFID applications is proposed. The tag antenna is designed to operate at 2.45 GHz (2.25– 2.55 GHz) and 5.8 GHz (5.65– 5.95 GHz) bands. The radiation characteristics of the tag antenna in free space are investigated. The radar cross sections under different loads are obtained. The effect of curvature on the tag antenna performance is explained. Two examples are considered. In the first example, the tag antenna is mounted on cylindrical bottle filled with the Palmitic Acid material or water like materials. The effect of the object properties on the radiation characteristics and the radar cross section is investigated. In the second example, the tag antenna is mounted on spherical bottle filled with the Palmitic Acid material. The radiation and backscattering characteristics are calculated. The Finite Element Method (FEM) is used for simulation and the Finite Integration Technique (FIT) is used to verify the simulated results.
66 citations