UHF/ VHF transfer switch

hi
i am trying to do a project . in this i want to design a DPDT transfer switch for two UHF/ VHF commication radios. these radios are connected to two antennae. i have a control switch to switch radios to upper to antenna 1 and antenna 2. the output power of radios is 12 watt. antenna and coxial cable impedance is 50 ohms. the control signal is ground.
can anyone has circuit or any material to have guidance
waqas