Dielectric Resonator Antenna Thesis

To improve the coupling between the excitation slot and CDR an offset distance between the center of CDR and center of excitation slot is introduced.The optimized offset position of the center of excitation slot is found to be mm from the center of CDR.

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We present a coplanar waveguide (CPW) fed slot-coupled cylindrical DRA (CDRA).

The antenna is based on two cylindrical dielectric resonators (CDRs) excited by means of rectangular slots placed below the CDRs; the HEM mode resonating at 94 GHz is generated within the CDRs.

This joule heating translates into a resistance change of the microbolometer.

The resistance change is sensed by biasing the microbolometer element with a constant current and monitoring the voltage change resulting from the incident radiation.

Antennas coupled with sensors such as microbolometers [1–5], metal-insulator metal (MIM) diodes [6, 7] have been investigated for imaging and spectroscopy applications in the millimeter wave (MMW) and terahertz (THz) spectral regions.

In antenna-coupled microbolometers, the antenna resonant current flows in the microbolometer located at the feed of the antenna causing joule heating in the microbolometer element.

The authors further argued that the operation of a dielectric antenna resembles the antenna conceived by Marconi, the only difference is that inductive element is replaced by the dielectric material.

KACST Technology Innovation Center in RFTONICS, King Saud University, Riyadh 11421, Saudi Arabia Received 22 October 2013; Revised 13 February 2014; Accepted 13 February 2014; Published 17 March 2014Academic Editor: Ahmed A. A novel antenna-coupled sensor configuration for millimeter wave detection is presented.

CPWs are used to feed the antenna resonant currents to the sensor which is placed at the center of the CPW.

Direct current (dc) cuts are introduced in the top ground plane to allow for sensor bias and detected signal readout.

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