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RF actuated DC power switch without relay

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neazoi

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Hi I am building a small transverter where the power to the TX/RX circuits will be switched, to enable TX or RX.
Changing of the state of the transverter should be from the RF input (left side) detection. On TX, the (higher than RX) power input to the left side will activate a circuit, to switch DC to the TX circuits.

This can be done with a relay as shown, but what if I want to switch 2A at 12V without a relay (solid state)?
 

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It's not clear WHAT is in that square, but if you don't want to use a relay, you could use two mosfets (but that's actually what you would find in a SSR).
 

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