Design of an Electromagnetic Band Gap Shield for a Ku-Band VSAT Transmitter Power Amplifier

Abstract

In this paper, a shielding box is designed for a Ku-band VSAT transmitter power amplifier based on an electromagnetic band gap structure. The proposed structure, is a bed of nails on the inner surface of the top wall of the box. It suppresses cavity resonances in the Ku-band uplink frequency range of 14-14.5 GHz. The amplifier which is composed of two cascaded modules (a pre-amplifier and a 50 W power amplifier) is first imported to a full wave simulation software. Full wave simulation of the printed circuit board (PCB) which includes the small signal scattering parameters of the power amplifier modules, proves the optimum performance of the proposed design.

Keywords

• ku-band
• band gap structure
• shield
• satellite transmitter