Transceiver for transmitting and receiving an RF signal on at least two frequency ranges

A direct transform transmitter/receiver operating on at least two different frequency ranges, whereby the first frequency range comprises a first transmission range and a first reception range and where the second frequency range comprises a second transmission range and a second reception range, and whereby

• said receiver comprises at least one RX mixer for mixing a received signal to a baseband signal,
• said transmitter comprises at least one TX mixer for mixing a baseband signal to a transmission signal at a carrier frequency,
• the transmitter/receiver comprises synthesiser means (240),
• to the output of the synthesiser means there is connected first frequency division means (231) for generating a first in-phase RX mixing signal (RXM1I) and a first 90 degrees phase shifted RX mixing signal (RXM1Q) for the RX mixer in order to mix a signal (RXC1) received at the first reception frequency range to a baseband signal (RXB1), and
• to the output of the synthesiser means there is connected a second frequency division means (281) for generating a first in-phase TX mixing signal (TXM1I) and a first 90 degrees phase shifted TX mixing signal (TXM1Q) for the TX mixer in order to mix a first baseband TX signal to a first TX signal at the carrier frequency in the first transmission frequency range,
• characterised in that the transmitter/receiver further comprises
• third frequency division means (211) connected to the output of the synthesiser means for generating a second in-phase RX mixing signal (RXM2I) and a second 90 degrees phase shifted RX mixing signal (RXM2Q) from the output signal (RXS) of said synthesiser means in order to mix a signal received on a second reception frequency range to a second baseband RX signal (RXB2), and
• fourth frequency division means (261) connected to the output of the synthesiser means for generating a second in-phase TX mixing signal (TXM2I) and a second 90 degrees phase shifted TX mixing signal (TXM2Q) from the output signal (TXS) of said synthesiser means in order to mix a second baseband TX signal (TXB2) to a second signal (TXC2) at the carrier frequency on the second transmission frequency range.