portable antenna VSWR
portable antenna VSWR
(OP)
What sort of VSWR do one have to accept (in general) on a UHF whip antenna mounted on a handheld two-way radio with almost no ground plane?
My concern is the load presented to the PA rather than radiation efficiency.
My concern is the load presented to the PA rather than radiation efficiency.





RE: portable antenna VSWR
Why are you worried ?
RE: portable antenna VSWR
RE: portable antenna VSWR
RE: portable antenna VSWR
The problem is the amount of "damping" needed in the PA transistor to allow for a high load VSWR without instability. And also the PA power/current under these conditions.
RE: portable antenna VSWR
In general, you should study existing (successful) designs and see how others have done it. There should be reference designs on the websites of companies selling the applicable transistors (Motorola, etc.).