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Title:
HIGH FREQUENCY CIRCUIT
Document Type and Number:
Japanese Patent JP3224932
Kind Code:
B2
Abstract:

PURPOSE: To enable high integration by forming a matching circuit for impedance conversion by a transmission line in a spiral shape.
CONSTITUTION: A ground conductor 41 is formed on the lower surface of a semiconductor substrate 11, an electronic circuit 1 is formed on an upper surface, an input matching circuit 2 by a microstrip line is formed between the electronic circuit 1 and an input terminal 4 and an output matching circuit 3 by the microstrip line is formed between the electronic circuit 1 and an output terminal 5. The microstrip lines of the input matching circuit 2 and the output matching circuit 3 are formed in the spiral shape and the line interval is set to a degree capable of neglecting influence by coupling between the lines and preventing a function as an inductor. Thus, a circuit area is made small and effective for respective line lengths especially is attained, the entire high frequency circuit is miniaturized and a density is made high.


Inventors:
Nishikawa, Kenjiro
Toyoda, Kazuhiko
Tokumitsu, Tsuneo
Kamogawa, Kenji
Application Number:
JP1994000031380
Publication Date:
November 05, 2001
Filing Date:
March 01, 1994
Export Citation:
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Assignee:
NIPPON TELEGR & TELEPH CORP <NTT>
International Classes:
H01P3/08; H01P5/02; (IPC1-7): H01P3/08; H01P5/02
Attorney, Agent or Firm:
古谷 史旺



 
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