Radio transmitter/receivers with non interferring local oscillator frequency

摘要

In a radio transmitter/receiver comprising a transmitter, a superheterodyne receiver, and a local oscillator for supplying a local oscillation signal to the superheterodyne receiver, the intermediate frequency fif of the superheterodyne receiver is set to have a value expressed by fif=(2K-1)xfch/2 where fch represents a frequency spacing between radio frequencies assigned to a communication and K represents a natural number.