Patent ID: 6987951

Claim:
A transceiver, comprising: a transmitting branch; a receiving branch; a duplex unit connected to said transmitting branch, to said receiving branch and to be connected to an antenna, said duplex unit separating said transmitting branch from said receiving branch; a first mixer having an output and an input connected to said receiving branch; a first local oscillator connected to said first mixer; a receiving intermediate-frequency path connected to said output of said first mixer, said receiving intermediate-frequency path having an intermediate-frequency in a range of to 0.5 megahertz; a second mixer having an input and an output connected to said transmitting branch; a transmitting intermediate-frequency path connected to said input of said second mixer, said transmitting intermediate-frequency path having an intermediate-frequency in a range of 180 megahertz to 200 megahertz; a second local oscillator; a changeover switch connected to said first local oscillator, to said second local oscillator and to said second mixer; a third mixer connected to said second mixer; a digital-to-analog converter connected to said third mixer; and a third local oscillator connected to said third mixer.