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.

Transcutaneous power transmission utilizing non-planar resonators

Abstract: A system for omni-orientational wireless energy transfer is described. A transmitter unit has a transmitter resonator with a coil that is configured to be coupled to a power supply to wirelessly transmit power to a receiver unit. A receiver unit has a receiver resonator with a coil coupled to a device load. At least one of the resonators is a non-planar resonator that spans a non-degenerate two-dimensional surface having at least one concave portion.

Light modulation in whispering-gallery-mode resonators

Abstract: Techniques to modulate light by using a whispering gallery mode optical resonator. The light modulator uses an optical coupler (121) to input an optical beam (104), from a laser (102), into a wispering gallery mode resonator formed of an Electro-Optic material (110). An electronic driving circuit (140) is coupled to supply the electrical wave to the electrical coupler (130). A control signal (150) can be fed into the circuit (140) to modulate the electrical wave. This modulation is then transferred to the output coupler (122) which provides a modulated optical output (124).

Dielectric waveguide resonator, dielectric waveguide filter, and method of adjusting the characteristics thereof

Abstract: A conducting film is formed on a dielectric block in a dielectric waveguide resonator, and a through-hole is formed in the dielectric block. The unloaded Q is set by selecting the outside dimensions of the dielectric block. The resonance frequency is set by selecting the size and location of the through-hole as well as the outside dimensions of the dielectric block. A terminal electrode is formed on the outer surface of the dielectric block. A coupling hole is formed in the dielectric block and a coupling electrode is formed on the inner surface of the coupling hole. One end of the coupling electrode is connected to the terminal electrode and the other end of the coupling electrode is either connected to the conducting film formed on the outer surface of the dielectric block or terminated inside the dielectric block. The above structure allows an increase in the degree of freedom in the design of the characteristics including the resonance frequency and unloaded Q of the dielectric waveguide resonator. The invention also provides a dielectric waveguide filter with a simple coupling mechanism whereby it is possible to couple to an external circuit without having to use an additional member and without electromagnetic leakage.

Wideband Omnidirectional Circularly Polarized Dielectric Resonator Antenna With Parasitic Strips

Abstract: A wideband omnidirectional circularly polarized (CP) rectangular dielectric resonator antenna (DRA) is investigated in this communication. An inclined slot, loaded by a parasitic conducting strip, is fabricated on each sidewall of the DRA. The parasitic strips can excite a CP mode, which combines with the CP DRA mode to provide a wideband axial-ratio (AR) bandwidth of more than 25%. To fully utilize the increased AR bandwidth, the impedance bandwidth is also broadened by introducing a hollow cylinder at the center of the DRA. The hollow region is also used to accommodate a coaxial probe that excites the antenna. The reflection coefficient, AR, radiation pattern, antenna gain, and efficiency of the antenna are studied, and reasonable agreement between the measured and simulated results is observed. A parametric study was also carried out to characterize the proposed wideband CP omnidirectional antenna.

An investigation of stacked and embedded cylindrical dielectric resonator antennas

Abstract: Various multisegment cylindrical dielectric resonator antenna geometries are considered including stacked, core-plugged, and embedded stacked. Results show impedance bandwidths up to 68.1% compared to 21.0% for a homogeneous DRA with the same size and resonant frequency.