 All four receiver antennas were connected via separate leads to a motorized switch that selected each one of the inputs in turn , sending it into the amplifier . The output was then switched , using the same system , to one of four inputs into the CRTs . The entire radar dipole aerial setup for the AI Mk.IV was simple in comparison to the 32 @-@ dipole Matratze ( mattress ) transceiving array fitted to the noses of the earliest German night fighters to use AI radar , for their own UHF @-@ band Lichtenstein B / C airborne radar design from 1942 – 43 . 
