H-Band Waveguide Filters for Duplex THz Communications

In this paper we demonstrate the design of H-band waveguide filters for communication purposes. Based on simple design equations, aided by 3D-FEM simulations, we show that with standard microwave H-plane iris filters, we can achieve waveguide diplexer, covering the whole WR-3.4-band from 220–325GHz and are thus predestined for sub-THz communication links. The design and the applicability for duplex data links is further evaluated in real-time over-the-air communication experiments.