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.

Canonical Bandpass Filters Using Dual-Mode Dielectric Resonators

Abstract: A canonical bandpass filter constructed by placing dual-mode dielectric resonators coaxially in a cutoff circular waveguide is discussed Rigorous analysis of the dual-mode dielectric resonator and inter-resonator coupling is performed with the mode matching technique Four- and six-pole elliptic bandpass filters are realized at 12 GHz

Integral resonator gyroscope

Abstract: The present invention discloses an inertial sensor having an integral resonator. A typical sensor comprises a planar mechanical resonator for sensing motion of the inertial sensor and a case for housing the resonator. The resonator and a wall of the case are defined through an etching process. A typical method of producing the resonator includes etching a baseplate, bonding a wafer to the etched baseplate, through etching the wafer to form a planar mechanical resonator and the wall of the case and bonding an end cap wafer to the wall to complete the case.

A TE01n Cavity Resonator Method to Determine the Complex Permittivity of Low Loss Liquids at Millimeter Wavelengths

Abstract: Two oversized TE01n cavity resonator systems have been constructed that are suitable for measuring the complex permittivity e=e′ (1 − j tanδ) of low loss liquids at millimeter wavelengths. One of them operates at frequencies from 26 to 70 GHz, while the second, which is described in detail, was tested at frequencies around 136 GHz where a quality factor of about 60 000 was obtained. e′ is determined from the wavelengths measured in the filled and unfilled resonator. The loss factor tanδ is obtained from the half‐widths of the resonance curves in both resonator states. For that purpose, the frequency of the oscillator is swept, and the resonance curves vs frequency are displayed on an oscilloscope. Frequency calibration marks are generated by the absorption resonances of a second long open resonator operating in the HE11m dipole mode which is guided by a thin dielectric thread. To restrict the influence of traces of water in the liquids to be measured, the resonator is permanently connected to an apparatus...

Bandwidth Broadening of Dielectric Resonator Antenna by Merging Adjacent Bands

Abstract: A broadband dielectric resonator (DR) antenna is designed by merging its three resonant bands. An asymmetrical moat carved off the DR is designed to perturb the electric field distribution within the DR so that the Q factor of the DR is reduced, and the radiation pattern on the E-plane can be modified to increase the gain in the broadside direction. The mode mixing effect on the radiation patterns is also studied. A wide impedance bandwidth of 33%(4.89-6.86 GHz) is obtained with broadside radiation pattern of vertical polarization on the horizontal plane. This DR antenna can be used for WLAN 802.11a (5.15-5.85 GHz) applications.

Frequency-Reconfigurable Rectangular Dielectric Resonator Antenna

Abstract: A coplanar waveguide (CPW) reconfigurable dielectric resonator antenna (DRA) is presented and investigated. The DRA is capable of frequency tuning at three different frequency bands between 3.45 and 6.77 GHz. The overall size of the antenna is 50 × 57 mm2. The dielectric material is a rectangular block of ceramic with a permittivity of 15. Two switches, implemented using p-i-n diodes, are located on the lines of a feed network that is connected to the dielectric element. Single-band modes with impedance bandwidths of 8% and 16% are achieved by switching “on” one of three connecting feedline networks, whereas a wide band, with an impedance bandwidth of 65%, is achieved by switching “on” two connecting lines. Frequencies in the single band can be independently controlled using switch positions without affecting the wideband mode. The prototype has a low profile with a dielectric resonator thickness of 4 mm. The characteristics of this antenna were studied, and good agreement was found between the numerical and measured results.