公开(公告)号：JPH08237005A

公开(公告)日：1996-09-13

申请号：JP31697195

申请日：1995-12-05

Applicant: KOREA ELECTRONICS TELECOMM

Inventor： KIYOU KOUYON ,  RI SOURETSU ,  KAN ISHIYOSHI

IPC: H01P1/203 ,  H03H7/075

Abstract: PROBLEM TO BE SOLVED: To provide a high-temperature superconductive heptode low-pass filter for microwave which uses a filter pattern where a high-temperature superconductive epitaxial thin film and an open stub system are adopted. SOLUTION: A single crystal substrate 4 is provided, and a micro strip line using a high-temperature superconductive thin film is formed on one side of the upper surface of the single crystal substrate. An input end 1 which is connected to a connector for input and to which a microwave signal is inputted from the outside is formed, and a microstrip line which uses a high-temperature superconductive material is formed on the other side of the upper surface of the single crystal substrate 4. An output end 3 which is connected to a connector for output and outputs a filtered signal to the outside is formed, and a micro strip line which is formed so as to be able immediately connecting to both of the input end 1 and the output end 3 and consists of the same material as the high-temperature superconductive material of the input end 1 and the output end 3 is formed between the input end 1 and the output end 3 on the surface of the single crystal substrate 4, thus realizing an open stub system.