H04B 1/006

Details of transmission systems, not covered by a single one of groups [CPC: H04B3/00] - [CPC: H04B13/00]; Details of transmission systems not characterised by the medium used for transmission {adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with common antenna for more than one band using switches for selecting the desired band }