Annular reflectors for an FEL resonator

DESIGN OF A RESONATOR FOR THE CSU THz FEL

A typical confocal resonator for THz radiation produced by an FEL will have a waist that is larger than the gap of the undulator. Hence waveguiding is required. Here we consider a resonator consisting of two spherical mirrors and a cylindrical waveguide in between. The radii of curvature for the mirrors are chosen to image the ends of the waveguide onto themselves. We discuss the properties of ...

DESIGN OF A RESONATOR FOR THE CSU THz FEL

A typical confocal resonator for THz radiation produced by an FEL will have a waist that is larger than the gap of the undulator. Hence waveguiding is required. Here we consider a resonator consisting of two spherical mirrors and a cylindrical waveguide in between. The radii of curvature for the mirrors are chosen to image the ends of the waveguide onto themselves. We discuss the properties of ...

Design and Fabrication of an Annular High Frequency Resonator

We present a new high frequency resonator using a high order mode shape of an annular structure. The basic concept of an annular high frequency resonator (AHFR) is presented and the AHFR is fabricated by using a standard surface micromachining technology. Using theoretical analysis, the resonant frequency of the AHFR was expressed in a simple form. On this basis, a theoretical formula for the A...

Broadband Annular-Ring Dielectric Resonator Antenna

An Artificial Neural Network Approach for the Harmonic Design of Annular Ring Dielectric Resonator Antennas

The design and optimization of an annular ring dielectric resonator antenna (DRA) operating in the C frequency band is addressed. The DRA is intended to be used as the radiating element of a transmitting array of active integrated antennas, its input impedance must exhibit a proper resistive load at the fundamental resonance frequency, as well as a dominant reactive behavior, either inductive o...