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Old September 2nd 05, 02:44 PM
CD
 
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Default EMRP effective monopole radiated power

Hello again everyone,

I was reading through a transmitter datasheet and it stated that it is
capable of outputting 1-50W. However, I got an email from the company
stating that it is only designed to work at 1W EMRP. Upon further
reading, I discovered that the effective monopole radiated power is the
transmitter output power multiplied by the antenna gain.

I'm a bit confused because if EMRP depends on antenna gain, then can't
the antenna be designed to have a higher gain and thus have a higher
EMRP? How can a transmitter be designed only for 1W EMRP? Does changing
the antenna design likely affect the transmitter performance?

I figured since the TX has a standard 50ohm output impedance, then as
long as I match the antenna I should not worry about VSWR going over
the max rating for the TX, no?

Thanks!