High frequency multi-stage amplifier

Abstract

Abstract PURPOSE:To attain individually the matching of each unit amplifier while keeping the mounting state by providing a microstrip line having a prescribed characteristic impedance in parallel with each stage unit amplifier. CONSTITUTION:In applying unit adjustment of the 1st stage amplifier 1, a branch section 11 connects an input microstrip line 5 and the 1st stage input matching circuit 1e, a branch section 12 connects the 1st stage output matching circuit 1f and a microstrip line 9 and a branch section 13 connects the microstrip line 9 and a microstrip line 10, and a branch section 14 connects the microstrip line 10 and an output microstrip line 6. In this case, a microwave signal inputted from an input terminal 4 is inputted to the 1st stage amplifier 1 but not inputted to the 2nd and 3rd stage amplifiers 2, 3 and outputted from an output terminal 7 via the microstrip lines 9, 10. Thus, the input/output matching of the 1st stage amplifier 1 is adjusted without being affected by the operating state of the 2nd and 3rd amplifiers 2, 3.

Inventors

• 👤 Akihiro Kamiogura
• 👤 上小倉　明宏

Bibliographic Details