Optimized Flange Designs for a Multigap-Waveguide Liquid Crystal Phase Shifter at Ka-Band
Year: 2025
Type: conference-paper
Abstract: This paper extends the investigation of the MultiGap-WaveGuide (MGWG) liquid crystal (LC) phase shifter by analyzing the impact of different flange designs. The flange is identified as a key limiting factor affecting insertion loss and resonance behavior. To address this, a chamfered impedance transformer and a 2D photonic crystal (PhC) flange are designed, manufactured, and experimentally evaluated. The chamfered design eliminates unwanted resonances. The measured insertion loss for the circular and chamfered flanges ranges from 2.1 dB to 3.1 dB over 24 GHz to 38.5 GHz, with a maximum Figure of Merit (FoM) of 105°/dB at 30 GHz. Additionally, a phase tuning curve is presented, illustrating the continuous tunability of the phase shifter.
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funder: Deutsche Forschungsgemeinschaft
Award: G34378521
OpenAlex ID: W4416367871