Title:
MICROWAVE AMPLIFIER
Document Type and Number:
WIPO Patent Application WO/2000/035084
Kind Code:
A1
Abstract:
A microwave amplifier comprises a field-effect transistor (1) whose ground terminal (2) is connected directly with a ground conductor pattern (11). The ground terminal (2) is also connected with a series circuit that includes a stabilizing resistor (12) and an open-end stub (13) having a length equal to 1/4 wavelength of the parallel resonance frequency. This suppresses undesirable parallel resonance due to the ground conductor pattern (11) and the open-end stub (5) and prevents the voltage drop across the stabilizing resistor (3) at the application of bias to the field-effect transistor as opposed to the prior art technology, resulting in stable operation of the microwave amplifier.
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Inventors:
UCHIDA HIROMITSU
OHSHIMA TAKESHI
ITOH YASUSHI
OHSHIMA TAKESHI
ITOH YASUSHI
Application Number:
PCT/JP1999/003114
Publication Date:
June 15, 2000
Filing Date:
June 10, 1999
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
H03F3/60; H01P5/02; (IPC1-7): H03F3/60
Foreign References:
| JPS61285811A | 1986-12-16 | |||
| JPH06276038A | 1994-09-30 | |||
| JPH0575361A | 1993-03-26 | |||
| JPH06188653A | 1994-07-08 |
Other References:
See also references of EP 1054508A4
Attorney, Agent or Firm:
Tazawa, Hiroaki (Kasumigaseki 3-chome Chiyoda-ku Tokyo, JP)
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