A novel technique for measuring small signal S-parameters of an RF/microwave transistor, power amplifying stage for use in power amplifier stability analysis

2002 ◽  
Author(s):  
G. Collinson ◽  
M. Jones
Keyword(s):  
Stability Analysis ◽  
Power Amplifier ◽  
Small Signal ◽  
Microwave Transistor ◽  
Novel Technique ◽  
S Parameters ◽  
Rf Microwave

Marginal RF Gain Investigation and Root Cause Determination

2013 ◽  
Author(s):  
Keith Harber ◽  
Steve Brockett
Keyword(s):  
Radio Frequency ◽  
Failure Analysis ◽  
Power Amplifier ◽  
Physical Analysis ◽  
Root Cause ◽  
S Parameter ◽  
Mode Of Operation ◽  
S Parameters

Abstract This paper outlines the failure analysis of a Radio Frequency only (RF-only) failure on a complex Multimode Multiband Power Amplifier (MMPA) module, where slightly lower gain was observed in one mode of operation. 2 port S-parameter information was collected and utilized to help localize the circuitry causing the issue. A slight DC electrical difference was observed, and simulation was utilized to confirm that difference was causing the observed S-parameters. Physical analysis uncovered a very visible cause for the RF-only failure.

Sign in / Sign up

Export Citation Format

Share Document