Investigation of Frequency-Selective Surfaces for a THz Gyromultiplier Output System

Abstract

Abstract-The recent development of some high-power THz vacuum electronic devices calls for the application of space filters such as frequency selective surfaces (FSSs) and polarization dividers. This paper presents the comparative study of two types of FSSs for a THz gyro-multiplier output system, one with high-pass characteristic while the other one with low-pass functionality. Both FSSs are designed, fabricated and experimentally tested between 200 and 1600 GHz to verify their capability of separating the dual-frequency output from the gyro-multiplier. The high-power operation capability of the FSSs is also characterized by taking both the corona discharge and volumetric breakdown into consideration at the frequencies of interest. Based on the comparative study of the performance, the fabrication challenge and the high-power capability between the two FSSs, a generalized conclusion is given regarding the choice of the FSSs for high-power THz application.

3D Printing of Millimetre Wave and Low-Terahertz Frequency Selective Surfaces Using Aerosol Jet Technology

“…FSS have traditionally been deployed in radomes [3], microwave absorbers [4], reflectors [5] and frequency demultiplexer [6]. Lately, FSS have found applications in control electromagnetic propagation in buildings [7], [8], remote sensing [9], beam steerable antennas, wireless communications [10] - [12] as well as gyromultipliers [13]. FSS can be fabricated using of a variety of fabrication techniques such as etching [11], [12], [14], micromachining [15] and in more recent development, using additive manufacturing [16].…”

Single-Substrate Double-Side High Selectivity Frequency Selective Surface

“…Frequency selective surface (FSS) is a type of signal conditioning component acting as a spatial filter and has seen a wide range of applications such as communication antenna [1], frequency separation in a quasi-optical system [2], and dual-frequency output in a high-power gyrotron system [3]. To accommodate different applications, the specifications of an FSS varies accordingly.…”