The residual quantity of a local oscillator signal in the output signal from a frequency transposition device having a differential Gilbert type structure is reduced by biasing the transistors of the output stage of the differential transconductor block of the device. A multi-megabit traffic exchange without loss of data is achieved. Together the patch antenna and ground plane form a surface on which other electrical components may be mounted, such as the transceiver circuitry of the mobile terminal. Upon application of a tensioning force, the clip is substantially straightened and the receiving body pulls tight against the crossbar in a secure relation.