Phase shifters; phase indicators; antennas for wireless communications apparatus; signal transformers for wireless communication; wireless communication apparatus; radio frequency receivers; radio frequency transmitters; radio frequency antennas; radio frequency repeaters; radio frequency adapters; wireless aerials; radio wave transmitting aerials; radio-frequency components; radio frequency filters; frequency converters; frequency stabilising apparatus; signal convertors; signal transmitters; signal splitters; integrated circuits for use in wireless communications
Electrical and Scientific Apparatus