High Temperature Superconductivity 3-dB Right Angle Hybrid Coupler with Microstrip Branch Line Method and Manufacturing Method Thereof

摘要

The present invention is a kind of 3-dB hybrid coupler, which is a core element constituting a multiplexer or mixer, which is a core component used in a microwave communication system, and a 4-port for microwave having a square strip of a microstrip branch line method. Passive element.;The right angle hybrid coupler of the present invention is designed to exhibit excellent coupling characteristics of about 3 dB or more in the vicinity of 10 GHz, and was manufactured by microforming (patterning) high temperature superconducting YBCO / MgO epitaxial thin films.;Subsequently, Ti (10 nm) / Ag (2 μm) for the collector plane was deposited on the back surface of the substrate to have a YBCO / MgO / Ti / Ag structure.;The low temperature microwave characteristics were measured by embedding in a three-component test fixture having four K-connects (4-port).;Wireless and microwave communication components that use these high temperature superconducting couplers as core devices can be processed losslessly and dissipatively, and are simple and lightweight because they are microstrip line subsystems.;In addition, since the hybrid coupler using the excellent microwave characteristics of the fine superconductor, the combination was excellent and the microwave loss characteristics were also very good.