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Showing papers on "Dielectric resonator antenna published in 2009"


Patent
25 Sep 2009
TL;DR: In this paper, improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator with a Q -factor Q 2 >100 coupled to a drain located a distance D from the source, where the source and the second resonators are coupled to exchange energy wirelessly among the source this paper.
Abstract: Described herein are improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator having a Q-factor Q 2 >100 and a characteristic size x 2 coupled to an energy drain located a distance D from the source resonator, where the source resonator and the second resonator are coupled to exchange energy wirelessly among the source resonator and the second resonator.

535 citations


Patent
14 May 2009
TL;DR: In this paper, an apparatus for use in wireless energy transfer is described, which includes a first resonator structure configured for energy transfer with a second resonance structure over a distance D larger than characteristic sizes of the first and second resonator structures.
Abstract: Disclosed is an apparatus for use in wireless energy transfer, which includes a first resonator structure configured for energy transfer with a second resonator structure over a distance D larger than characteristic sizes, [insert formula] and [insert formula], of the first and second resonator structures. A power generator is coupled to the first structure and configured to drive the first resonator structure or the second resonator structure at an angular frequency away from the resonance angular frequencies and shifted towards a frequency corresponding to an odd normal mode for the resonator structures to reduce radiation from the resonator structures by destructive far-field interference.

442 citations


Patent
28 Dec 2009
TL;DR: In this paper, the authors described improved capabilities for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and where the field of at least one of the source resonator and the second resonator is shaped to avoid a loss-inducing object.

315 citations


Journal ArticleDOI
TL;DR: A two-dimensional nanoscale structure which consists of two metal-insulator-metal (MIM) waveguides coupled to each other by a ring resonator is designed and the transmission characteristics of surface plasmon polaritons are studied.
Abstract: A two-dimensional nanoscale structure which consists of two metal-insulator-metal (MIM) waveguides coupled to each other by a ring resonator is designed. The transmission characteristics of surface plasmon polaritons are studied in this structure. There are several types of modes in the transmission spectrum. These modes exhibit red shift when the radius of the ring increases. The transmission properties of such structure are simulated by the Finite-Difference Time-Domain (FDTD) method, and the eignwavelengths of the ring resonator are calculated theoretically. Results obtained by the theory of the ring resonator are consistent with those from the FDTD simulations.

244 citations


Patent
06 Nov 2009
TL;DR: In this article, improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator with a Q -factor Q 2 >100 coupled to a drain located a distance D from the source, where the source and the second resonators are coupled to exchange energy wirelessly among the source this article.
Abstract: Described herein are improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator having a Q-factor Q 2 >100 and a characteristic size x 2 coupled to an energy drain located a distance D from the source resonator, where the source resonator and the second resonator are coupled to exchange energy wirelessly among the source resonator and the second resonator.

242 citations


Patent
01 Oct 2009
TL;DR: In this article, the authors proposed a method for transferring energy wirelessly, including transferring energy from a first resonator structure to an intermediate resonator, by adjusting at least one of the coupling rates κ 1B and κ B2 during the wireless energy transfers.
Abstract: Disclosed is a method for transferring energy wirelessly including transferring energy wirelessly from a first resonator structure to an intermediate resonator structure, wherein the coupling rate between the first resonator structure and the intermediate resonator structure is κ 1B , transferring energy wirelessly from the intermediate resonator structure to a second resonator structure, wherein the coupling rate between the intermediate resonator structure and the second resonator structure is κ B2 , and during the wireless energy transfers, adjusting at least one of the coupling rates κ 1B and κ B2 to reduce energy accumulation in the intermediate resonator structure and improve wireless energy transfer from the first resonator structure to the second resonator structure through the intermediate resonator structure.

199 citations


Patent
31 Dec 2009
TL;DR: In this paper, improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator with a Q -factor Q 2 >100 coupled to a drain located a distance D from the source, where the source and the second resonators are coupled to exchange energy wirelessly among the source this paper.
Abstract: Described herein are improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator having a Q-factor Q 2 >100 and a characteristic size x 2 coupled to an energy drain located a distance D from the source resonator, where the source resonator and the second resonator are coupled to exchange energy wirelessly among the source resonator and the second resonator.

197 citations


Patent
28 Dec 2009
TL;DR: In this article, the authors described improved capabilities for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and where the field of at least one of the source resonator and the second resonator is shaped using a magnetic material to avoid a loss-inducing object.

169 citations


Patent
28 Dec 2009
TL;DR: In this paper, the authors described improved capabilities for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and where the field of at least one of the source resonator and the second resonator is shaped using a conducting surface to avoid a loss-inducing object.

157 citations


Patent
24 Jun 2009
TL;DR: An acoustic resonator comprises a first electrode, a second electrode and a piezoelectric layer disposed between the first and second electrodes as mentioned in this paper, and a reflective element disposed beneath the first electrode.
Abstract: An acoustic resonator comprises a first electrode a second electrode and a piezoelectric layer disposed between the first and second electrodes. The acoustic resonator further comprises a reflective element disposed beneath the first electrode, the second electrode and the piezoelectric layer. An overlap of the reflective element, the first electrode, the second electrode and the piezoelectric layer comprises an active area of the acoustic resonator. The acoustic resonator also comprises a bridge adjacent to a termination of the active area of the acoustic resonator.

153 citations


Patent
31 Dec 2009
TL;DR: In this article, improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator with a Q -factor Q 2 >100 coupled to a drain located a distance D from the source, where the source and the second resonators are coupled to exchange energy wirelessly among the source this article.
Abstract: Described herein are improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator having a Q-factor Q 2 >100 and a characteristic size x 2 coupled to an energy drain located a distance D from the source resonator, where the source resonator and the second resonator are coupled to exchange energy wirelessly among the source resonator and the second resonator.

Patent
17 Dec 2009
TL;DR: In this article, the authors describe a magnetic core for wireless power transmission in a mobile device, which includes a substrate, at least one microstrip line, and a magnet core.
Abstract: Disclosed is a resonator for wireless power transmission used in a mobile device. The resonator includes a substrate, at least one microstrip line, and a magnetic core. The microstrip line is formed on the substrate and is provided at one side thereof with a slit to have an open-loop shape. The magnetic core is formed on the substrate and is disposed on a space defined by the microstrip line to increase coupling strength.

Patent
16 Dec 2009
TL;DR: In this article, improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator with a Q -factor Q 2 >100 coupled to a drain located a distance D from the source, where the source and the second resonators are coupled to exchange energy wirelessly among the source this article.
Abstract: Described herein are improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator having a Q-factor Q 2 >100 and a characteristic size x 2 coupled to an energy drain located a distance D from the source resonator, where the source resonator and the second resonator are coupled to exchange energy wirelessly among the source resonator and the second resonator.

Patent
30 Dec 2009
TL;DR: In this article, the authors described a method and system comprising a first resonator coupled to an energy source generating a field having magnetic material, and a second resonator located a variable distance from the source resonator having magnetic materials and not connected by any wire or shared magnetic material to the first resonance.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a first resonator coupled to an energy source generating a field having magnetic material, and a second resonator located a variable distance from the source resonator having magnetic material and not connected by any wire or shared magnetic material to the first resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator, and where the field of at least one of the source resonator and the second resonator is shaped using magnetic materials to increase the coupling factor among the resonators.

Patent
29 Dec 2009
TL;DR: In this paper, the authors described improved capabilities for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator has Q>100 and the second resonator has Q>100, the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator, and the field of at least one of the source resonator and the second resonator is shaped using magnetic materials to increase the coupling factor among the resonators.

Patent
29 Dec 2009
TL;DR: In this paper, the authors described a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source, where the source and the second resonators are coupled to provide near-field wireless energy transfer among the source this paper.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator and where a loss inducing object is positioned to minimize loss in at least one resonator.

Journal ArticleDOI
TL;DR: In this paper, the single-photon transport in a single-mode waveguide coupled to a whispering-gallery-type resonator interacting with a two-level atom is analyzed.
Abstract: We analyze the single-photon transport in a single-mode waveguide coupled to a whispering-gallery-type resonator interacting with a two-level atom. The single-photon transport properties such as the transmission and reflection amplitudes, as well as the resonator and the atom responses, are solved exactly via a real-space approach. The treatment includes the intermode backscattering between the two degenerate whispering-gallery modes of the resonator, and the dissipations of the resonator and the atom. We also show that a generalized critical coupling condition, that the single-photon transmission at the output of the waveguide goes to zero on resonance for a matched system, holds for the full coupled waveguide-ring resonator-atom system.

Patent
30 Dec 2009
TL;DR: In this paper, the authors described a method and system comprising a first resonator optionally coupled to an energy source and a second resonator located a variable distance from the source resonator and not connected by any wires to the first one.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a first resonator optionally coupled to an energy source and a second resonator located a variable distance from the source resonator and not connected by any wires to the first resonator, where the first resonator and the second resonator are coupled to provide near-field wireless energy transfer among the first resonator and the second resonator, and where the field of at least one of the first resonator and the second resonator is shaped to increase the coupling factor among the resonators.

Patent
29 Dec 2009
TL;DR: In this article, the authors described a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source, where a loss inducing object is positioned to increase the coupling factor among the resonators.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator, and where a loss inducing object is positioned to increase the coupling the coupling factor among the resonators.

Patent
29 Dec 2009
TL;DR: In this paper, the authors described a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source, where the source and the second resonators are coupled to provide near-field wireless energy transfer among the source this paper.
Abstract: In embodiments of the present invention improved capabilities are described for a method and system comprising a source resonator optionally coupled to an energy source and a second resonator located a distance from the source resonator, where the source resonator and the second resonator are coupled to provide near-field wireless energy transfer among the source resonator and the second resonator, and where the field of at least one of the source resonator and the second resonator is shaped using conducting surfaces to increase the coupling factor among the resonators.

Journal ArticleDOI
TL;DR: In this paper, a dual-band dielectric resonator antenna (DRA) using a parasitic c-slot fed by a microstrip line is proposed, which performs the functions of an effective radiator and the feeding structure of the parasitic C-slot in the ground plane.
Abstract: A compact dual-band dielectric resonator antenna (DRA) using a parasitic c-slot fed by a microstrip line is proposed. In this configuration, the DR performs the functions of an effective radiator and the feeding structure of the parasitic c-slot in the ground plane. By optimizing the proposed structure parameters, the structure resonates at two different frequencies. One is from the DRA with the broadside patterns and the other from the c-slot with the dipole-like patterns. In order to determine the performance of varying design parameters on bandwidth and resonance frequency, the parametric study is carried out using simulation software High-Frequency Structure Simulator and experimental results. The measured and simulated results show excellent agreement.

Journal ArticleDOI
TL;DR: In this paper, a dual-mode dual-band bandpass filter with two transmission poles in both passbands using a single ring resonator is proposed, where two excited ports are placed at the 135deg -separated positions along the ring resonators and coupled with the ring via parallel-coupled lines, leading to synchronous excitation of two transmission pole in dual passbands.
Abstract: A dual-mode dual-band bandpass filter with two transmission poles in both passbands using a single ring resonator is proposed. Two excited ports are placed at the 135deg -separated positions along the ring resonator and coupled with the ring via parallel-coupled lines, leading to synchronous excitation of two transmission poles in dual passbands. After the principle of this initial filter is described, an improved ring resonator with periodic loading of open-circuited stubs is constructed and studied to achieve compact size and adjustable spacing between the two passbands. Finally, a dual-band ring resonator filter with center frequencies at 2.4 and 5.8 GHz is designed and fabricated. Measured results verify the design principle.

Patent
14 Dec 2009
TL;DR: In this article, improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator with a Q -factor Q 2 >100 coupled to a drain located a distance D from the source, where the source and the second resonators are coupled to exchange energy wirelessly among the source this article.
Abstract: Described herein are improved capabilities for a source resonator having a Q-factor Q 1 >100 and a characteristic size x 1 coupled to an energy source, and a second resonator having a Q-factor Q 2 >100 and a characteristic size x 2 coupled to an energy drain located a distance D from the source resonator, where the source resonator and the second resonator are coupled to exchange energy wirelessly among the source resonator and the second resonator.

Journal ArticleDOI
TL;DR: In this paper, a quad-mode dielectric resonator filter using a simple cylinder resonator is proposed for both wireless and satellite applications using a four-pole single cavity filter.
Abstract: This paper introduces for the first time a quad-mode dielectric resonator filter, using a simple cylinder resonator A four-pole single cavity filter is designed, simulated, and fabricated based on this quadruple mode resonator Additionally, a new type of dual-mode dielectric resonator filters is introduced, using the same cylindrical resonator cut in half along its axis Center frequency control, intra/inter/input-coupling mechanisms, tuning, and spurious improvement methods are discussed, showing versatility of the proposed structures to realize different filtering functions and specifications Measured results are presented for practical filters, employing the proposed quad-mode and dual-mode resonators The dielectric resonator filters presented in this paper offer a significant size and mass reduction in comparison with conventional dielectric resonator filters They promise to be useful for both wireless and satellite applications

Journal ArticleDOI
TL;DR: In this paper, a low-cost and high-gain microstrip/dielectric resonator hybrid antenna was proposed for short-range millimeter-wave communication systems operating in the 57-65 GHz frequency band.
Abstract: A new low-cost and high-gain microstrip/dielectric resonator hybrid antenna is described for short-range millimeter-wave communication systems operating in the 57-65 GHz frequency band. The impedance bandwidth (VSWR < 2) of the proposed antenna is wide enough to entirely cover this portion of unlicensed spectrum (ap 5%). Furthermore, the measured high gain (11.9 plusmn 0.9 dB) is fairly constant across the operating band. A study of the electric and magnetic fields inside the hybrid structure concludes that the excitation of a higher-order mode inside the dielectric resonator (namely the HEM15delta hybrid mode) is responsible for the improved gain since the electrical size of the antenna is increased. In order to validate the proposed design, theoretical calculations and measurements from a fabricated prototype are provided.

Journal ArticleDOI
TL;DR: In this paper, a cylindrical dielectric resonator antenna (DRA) is used to increase the antenna gain by feeding a coaxial probe and integrating it within a CEMB substrate.
Abstract: In this paper, the performance of a cylindrical dielectric resonator antenna (DRA) is improved using a new cylindrical electromagnetic bandgap substrate. The DRA is fed by a coaxial probe and integrated within a cylindrical electromagnetic bandgap (EBG) substrate to increase the antenna gain. The cylindrical electromagnetic bandgap structure is composed of two distinctive periodic structures. The first structure is made of metallic rings, while the second is formed of grounding vias, which are placed radially and circularly. To describe and optimize this EBG stucture, a parametric study using a finite integration method was carried out. Furthermore, an antenna prototype was fabricated and measured to validate the proposed concept. The radiation patterns and return loss obtained from measurements demonstrate a good performance in terms of impedance matching and gain enhancement.

Journal ArticleDOI
TL;DR: In this paper, a novel kind of circular polarization and dual-frequency linear polarization microstrip antennas are proposed based on the anisotropic property of the complementary split ring resonator.
Abstract: A novel kind of circular polarization and dual-frequency linear polarization microstrip antennas is proposed. The designs are based on the anisotropic property of the complementary split ring resonator. When the complementary split ring resonator is etched on the patch of the probe-fed microstrip antenna, the gap orientation asymmetric or symmetric to the current propagating direction will render the antenna to radiate circular polarization waves or dual-frequency linear polarization waves. Details of the experimental results compared with the simulated results are presented and discussed.

Journal ArticleDOI
TL;DR: In this article, the microwave dielectric properties of 0.95MgTiO3 and 0.05CaTiOO3 ceramics have been studied for application in the design of a dielectrically resonant antenna.

Journal ArticleDOI
TL;DR: In this paper, a rectangular dielectric resonator antenna (DRA) structure fed by two vertical strips with quadrature in phase is studied, and both the fundamental TE111 and higher order TE113 modes can be simultaneously excited to generate a wideband circular polarization.
Abstract: In this letter, a rectangular dielectric resonator antenna (DRA) structure fed by two vertical strips with quadrature in phase is studied. Both the fundamental TE111 and the higher order TE113 modes can be simultaneously excited to generate a wideband circular polarization. The measured 10-dB impedance bandwidth is 32.8% from 2.7 to 3.76 GHz, under which the axial ratio is less than 4 dB. The radiation pattern and antenna gain are also studied.

Journal ArticleDOI
TL;DR: A summary of recent publications on FPR antenna focusing on the different capabilities, technologies and architectures that have been proposed shows that such analytic models as FP cavity model, EBG defect model, transmission line model, leaky wave model and refractive lens model are consistent when applied to analyze this type of resonator antenna.
Abstract: Fabry-Perot Resonator (FPR) antennas have attracted significant attention in microwave and millimeter waves due to a number of attractive properties, such as low complexity, high directivity and conformal deployment capability. In this paper, a summary of recent publications on FPR antenna is presented focusing on the different capabilities, technologies and architectures that have been proposed. Several structures, analytic models and research developments and a corresponding comparison are also made. It shows that such analytic models as FP cavity model, EBG defect model, transmission line model, leaky wave model and refractive lens model are consistent when applied to analyze this type of resonator antenna. Some interesting topics under recent research are surveyed in detail. At the same time some attractive topics to be further researched are also pointed out. Recent works of the authors are also included in this paper.