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.

Microwave intermodulation of a superconducting disk resonator

Abstract: We calculate the third order intermodulation products for the TM010 mode of a thin film disk resonator and discuss the particular case of a 1 GHz resonator in order to obtain a quantitative idea of the performance that can be obtained. The linear and nonlinear microwave responses of a TM010 disk resonator are then compared to that of an equivalent half wavelength microstrip resonator. This analysis allows one to independently quantify the contributions to the nonlinear device performance from the material properties, device size and field configuration.

Wideband Dielectric Resonator Antenna With a Tunnel

Abstract: A wideband rectangular dielectric resonator (DR) with a horizontal tunnel is proposed. The bandwidth of the TEy 111 mode is increased by using the tunnel to reduce the Q-factor of the DR. As the tunnel height is increased, the electric field distribution of the TEy 112 mode is significantly modified such that its electric field distribution near the top surface of DR is similar to that of the TEy 111 mode, rendering a broadside radiation pattern. The band of the modified TEy 112 mode is merged with that of the TEy 111 mode to achieve a wide bandwidth of 20% (4.765.86 GHz) with broadside radiation pattern of vertical polarization on the xy-plane. The proposed DR antenna can be used in WLAN 802.11a applications.

Theory and Experiment of the Wideband Two-Layer Hemispherical Dielectric Resonator Antenna

Abstract: The two-layer hemispherical dielectric resonator antenna (DRA) excited by an annular slot is investigated. The slot excitation can be placed in the inner or outer dielectric layer, and the two configurations are studied and compared in this paper. Both problems were solved rigorously using the Green's function approach and the method of moments. The maximum impedance bandwidth and a new bandwidth that considers the field pattern are investigated. Good agreement between the calculations, measurements, and HFSS simulations is obtained.

Track-changing utilizing phase response of resonators

Abstract: A device and method of track changing an optical signal beam in response to the frequency selective phase characteristics of a resonator. The resonator is side-coupled to a single optical beam and only affects that beam's phase, without disturbing its amplitude to any significant degree. For all resonator and input beam configurations, the phase-shift at a resonant frequency is always π, thus the relative switching characteristics are similar regardless of the exact configuration. Track changing is accomplished through interferometry. The signal, after having interacted with the resonator, is made to interfere with a reference beam. The reference beam is created by dividing an input signal into two paths, one which interacts with the resonator, the other which serves as the reference. In an alternative embodiment, the device acts as a mode converter. The resonator converts an even system-mode to an odd system-mode (or vise versa). At the output of the device is an interference filter, or mode filter, which redirects the signal according to the phase response of the resonator.

Triple mode dielectric resonator hybrid reflection filters

Abstract: A new class of dielectric resonator filter is described. These devices use the triply degenerate TE/sub 11/spl delta// mode in a cubic dielectric resonator. A simple theory is used to show the similarity between this mode and the TE/sub 10/spl delta// mode in a cylindrical resonator. The cubic resonator is used in a hybrid reflection mode filter where the even and odd subnetworks of a bandpass filter are connected to two ports of a 3 dB quadrature hybrid. The transmission response through the other two ports is then the reflection coefficient of the bandpass filter. The design approach only requires the realisation of simple one port ladder networks and is ideal for realising complex filters using triple mode resonators. A design example is presented for a degree 6 elliptic function bandstop filter operating in the 850 MHz cellular radio band. A threefold size reduction is achieved when compared to single mode filters with similar electrical performance.