Beam-Steering Antenna with Tunable Beamwidth Using Rotman Lens and Power Combiner

Abstract

This paper describes a beam-steering antenna having tunable beamwidth implemented by using Rotman lens and power combiner. Conventional Rotman Lens array antenna has only the fixed beamwidth. However, the proposed array antenna has the variable beamwidth. The operating frequency is 3.55 GHz. The input power can be fed into Rotman lens through the power divider or directly, depending on the synthesizing beamwidth. The simulation results showed the steering beam with tunable beamwidth. Designed antenna and Rotman lens were fabricated.