Liquid Crystal Based Dielectric Waveguide Phase Shifters for Phased Arrays at W-Band

IEEE Access

Angel Blanco Granja¹  Holger Maune¹  Roland Reese¹  Henning Tesmer¹  Christian Schuster¹  Jonathan Strobl²  Matthias Nickel²  Rolf Jakoby²  Ersin Polat² 

[1] Institute for Microwave Engineering and Photonics, Technische Universit&x00E4;t Darmstadt, Darmstadt, Germany;

关键词: Phased array;    millimeter wave devices;    microwave liquid crystal;    dielectric waveguide;   

DOI  :  10.1109/ACCESS.2019.2939648

来源: DOAJ

【 摘 要 】

In this work, the feasibility of microwave liquid crystal based dielectric waveguide phased shifters is investigated in a phased rod antenna array for the first time. For this, a 1×4 rod antenna array is designed including the phase shifters as well as a cascaded E-plane power divider network. As core elements, the phase shifter are designed as continuously tunable subwavelength fibers, partially filled with a newly specifically synthesized microwave liquid crystal, exhibiting a maximum FoM 145°/dB at 102.5GHz. As proof-of-concept, a simplified electric biasing network is developed, demonstrating its beam steering capability by changing the scanning angle between 0°, -25° and +15° with three different voltage distributions. The antenna array is well matched throughout the complete W-band with a input reflection below -10 dB. The measured antenna gain is between 11.5 to 9.1 dBi at 85 GHz accompanied with a side lobe level between -12 to -7 dB, depending on the steering configuration.

【 授权许可】

Unknown