GSM 900 MHz power amplifier teardown
Mads Barnkob, Thu Jun 23 2016, 05:44AMMy first time opening up one of these power amplifier / filters :)
Re: GSM 900 MHz power amplifier teardown
Uspring, Thu Jun 23 2016, 11:09AM
The waveguides look interesting. Usually they transmit every frequency above some lower threshold, i.e. width and height > lambda/2. I think you are right, that the cavities serve to suppress harmonics and that you need several of them since each cavity does not have a large Q due to the input and output load.
Uspring, Thu Jun 23 2016, 11:09AM
The waveguides look interesting. Usually they transmit every frequency above some lower threshold, i.e. width and height > lambda/2. I think you are right, that the cavities serve to suppress harmonics and that you need several of them since each cavity does not have a large Q due to the input and output load.
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