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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01 Nov 2010
TL;DR: A conformal trapezoid strip excited broadband hemispherical dielectric resonator antenna (DRA) design in ultra wide-band (UWB) low band 3.1–4.8 GHz for medical capsule endoscope applications and a successful video transmission from inside to outside body has been carried out based on multiband orthogonal frequency-division multiplexing scheme using the proposed antennas.
Abstract: This paper proposes a conformal trapezoid strip excited broadband hemispherical dielectric resonator antenna (DRA) design in ultra wide-band (UWB) low band 3.1–4.8 GHz for medical capsule endoscope applications. The proposed antenna can be conformal to the capsule dome and is also characterized by light weight, low profile, low cost, small size. A broadband trapezoid monopole receiver antenna is developed for transmission measurements. The UWB transmission loss characteristics in body tissue are exploited based on the measurement solution. Moreover, a successful video transmission from inside to outside body has been carried out based on multiband orthogonal frequency-division multiplexing (MB-OFDM) scheme using the proposed antennas. Additionally, a preliminary research based on a binary phase-shift keying (BPSK) carrier transmission has been done to investigate the potential capsule endoscope communication performance.
57 citations
06 Jun 2004
TL;DR: In this article, a theoretical model describing the split-cylinder resonator for non-destructive measurement of a dielectric substrate's relative permittivity and loss tangent was discussed.
Abstract: We discuss a theoretical model describing the split-cylinder resonator for non-destructive measurement of a dielectric substrate's relative permittivity and loss tangent. This improved model properly accounts for the fringing electric and magnetic fields in the dielectric substrate. Previously, the split-cylinder resonator has been used for single-frequency permittivity and loss tangent measurements using only the fundamental TE/sub 011/ resonant mode. By including high-order TE/sub 0np/ modes, we demonstrate how to measure the relative permittivity and loss tangent of dielectric substrates over an extended frequency range. We validated the new model by measuring the permittivity and loss tangent of fused-silica substrates from 10 to 50 GHz and comparing with results obtained with circular-cylindrical cavity, a dielectric-post resonator, and several split-post resonators.
57 citations
Patent•
26 Feb 2002TL;DR: In this article, the authors proposed an improved dielectric filter with an improved Q factor of a resonator, a low loss, and a high attenuation, where the resonator electrodes are electro-magnetically coupled to each other to form a tri-plate structure.
Abstract: A dielectric filter includes resonator electrodes, an inter-stage coupling capacitor electrode, and an input/output coupling capacitor electrode on dielectric substrates, respectively. The resonator electrodes are electro-magnetically coupled to each other to form a tri-plate structure, are made of a metallic foil embedded in a resonator dielectric substrate. Another dielectric filter includes an upper shield electrode dielectric substrate, an inter-stage coupling capacitor dielectric substrate, a resonator dielectric substrate, and an input/output coupling capacitor dielectric substrate which are made of a composite dielectric material including a high-dielectric-constant material and a low-dielectric-constant material. The above described arrangement provides the dielectric filter with an improved Q factor of a resonator, a low loss, and a high attenuation.
57 citations
Patent•
11 Jun 1998
Abstract: A crystal resonator assembly is described wherein a piezo-electric resonator (14) is mounted over a heat conducting substrate (28) and one or more heat generating elements (40) are located on the substrate. The heating elements provide heat both by conduction and radiation and by virtue of the use of a heat conducting substrate enable a uniform and efficient heating of the crystal resonator to a desired oven temperature.
57 citations
TL;DR: In this article, a novel wideband microstrip band-pass filter is presented based on a quadruplemode ring resonator, which is developed by introducing a stepped-impedance one-wavelength ring resonators (SORR) into a step-impingance half-wvelength resonator (SHR) in order to suppress the harmonic responses of the filter for a wide stop-band.
Abstract: A novel wideband microstrip band-pass filter is presented in this letter based on a quadruple-mode ring resonator, which is developed by introducing a stepped-impedance one-wavelength ring resonator (SORR) into a stepped-impedance half-wavelength resonator (SHR). In order to suppress the harmonic responses of the filter for a wide stop-band, two band-stop sections with asymmetrical -type structure are introduced. A prototype filter having 49.3% of 1 dB and 57.9% of 3 dB fractional bandwidth is fabricated with advantages of high selectivity and high out-of-band rejection. In the pass-band, the return loss is larger than 18.8 dB and at the centre frequency insertion loss is 0.6 dB. The experiments are in good agreement with the simulations.
57 citations