Patent ID: 6788957
Filing Date: 2004-09-07
Classification: H04B

Abstract:
A transmission circuit comprising a transmission channel for a carrier at a frequency f0, a transmission channel for a carrier at a frequency of f1 different from f0, a radiation circuit and a single selector switch to receive these two transmission channels and switch over one of these two transmission channels to the radiation circuit, wherein the transmission circuit comprises a single first filter element located between the selector switch and the radiation circuit, this first filter element being tuned to a second filter element located in the transmission channel at the frequency f0 to prevent the transmission, through this transmission channel at the frequency f0, of frequency components at the frequency f1, and the first filter element is tuned with a third filter element located in the transmission channel at the frequency f1 to enable the transmission, by this transmission channel at the frequency f1, of frequency components at the frequency f1.