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 article, a frequency-reconfigurable dielectric resonator antenna (DRA) for LTE/WWAN and WLAN applications is investigated and presented, which provides the frequency tuning between 1.60 and 2.71 GHz.
Abstract: A compact frequency-reconfigurable dielectric resonator antenna (DRA) for LTE/WWAN and WLAN applications is investigated and presented. The proposed antenna provides the frequency tuning between 1.60 and 2.71 GHz. The design consists of four identical rectangular dielectric resonators with permittivity of 10 each and three p-i-n diode switches that are located on the feedline network between each of two dielectric resonators. The proposed antenna size is $20 \times 36 \times 5.57~\hbox{mm}^3$ , which is suitable for mobile devices. The measurement and simulation results are applied to demonstrate the performance of the proposed antenna. From the measured results, it is found that the proposed antenna with acceptable performance provides four single-band modes with the impedance bandwidths of 17%, 11%, 14%, and 6%.
52 citations
Patent•
05 Jul 1985
TL;DR: In this article, a dielectric-resonator-stabilized, Gallium-Arsenide-FET, negative resistance oscillator operating in the microwave region was described.
Abstract: A dielectric-resonator-stabilized, Gallium-Arsenide-FET, negative resistance oscillator operating in the microwave region incorporating an improved form of dielectric resonator whose resonant frequency is tuned by the addition or removal of metal from the surface of a dielectric tuning plate in the resonator, and a method for tuning the oscillator to the desired frequency range with the resonator in place by use of a laser-trimming device are disclosed.
52 citations
TL;DR: In this paper, a hemispherical dielectric resonator antenna (DRA) generating two orbital angular momentum (OAM) states of l 1 + 1 and l 2 − 1 was studied theoretically and experimentally.
Abstract: A hemispherical dielectric resonator antenna (DRA) generating two orbital angular momentum (OAM) states of l = +1 and −1 is studied theoretically and experimentally. The DRA is fed with two orthogonal signals, exciting two degenerate higher-order TE221 modes that generate the two OAM states. It was simulated with full-wave simulation software to verify the design method. A prototype operating in the microwave band (5.8 GHz) was fabricated and measured. Its S-parameters, intensity profile, and phase pattern are simulated, and the results are compared with measurements. Also, its far-field radiation pattern, realized antenna gain, and total antenna efficiency are shown for a complete study of the antenna.
51 citations
Patent•
17 Feb 1998TL;DR: A vibrating structure gyroscope as discussed by the authors has a vibratory resonator having a substantially ring or hoop-like shape structure, an electromagnetic drive for causing the resonator to vibrate, a support structure including a plurality of flexible support beams for supporting the vibrator whilst allowing it to vibration, and an electromagnetic sensor for sensing movement of the resonance.
Abstract: A vibrating structure gyroscope has a vibratory resonator having a substantially ring or hoop-like shape structure, an electromagnetic drive for causing the resonator to vibrate, a support structure including a plurality of flexible support beams for supporting the resonator whilst allowing it to vibrate and an electromagnetic sensor for sensing movement of the resonator. The support beams and resonator are made from silicon and the electromagnetic drive and sensor include metal tracks which extend externally along each support beam onto and along respective segments of an outer substantially planar surface of the ring-like resonator. The resonator is substantially planar and means is produced a magnetic field substantially perpendicular to the plane of the resonator.
51 citations
TL;DR: In this article, a stripline resonator for ESR is described and the authors show that the relatively low Q value, as compared with a standard cavity, is to a high degree compensated by the higher filling factor.
Abstract: A stripline resonator for ESR is described. Spectra obtained show that the relatively low Q value, as compared with a standard cavity, is to a high degree compensated by the higher filling factor. The same resonator can be used for different frequencies. At low ESR frequencies the size of the resonator is much smaller than that of a cavity. A possibility of obtaining circularly polarized radiation is pointed out.
51 citations