摘要 |
An arrangement for transmitting and receiving of an RF signal in two frequency bands. In the solution according to the invention, a transmitter/receiver is used which is based on direct conversion and in it, when operating in both frequency bands, the mixing frequency is formed by means of the same voltage controlled oscillator (341). This is implemented preferably in such a way that in the higher operating frequency, the frequency of the output signal of the synthesizer means (340) including said voltage controlled oscillator (341) is used as such as a mixing frequency and when operating in the lower operating frequency, a mixing frequency is used which is obtained by dividing the frequency of the output signal of the synthesizer means (340) by two or a larger integer in the divider (311, 361). When the solution according to the invention is used, no intermediate frequency components are needed.
|