VHF RADIO PATH WITH INTERMEDIATE FREQUENCY FILTER AND FREQUENCY DETECTOR ON SURFACE ACOUSTIC WAVES

Abstract

The article applies a new approach to microminiaturization of the VHF radio path with a significant improvement of its main characteristics based on acoustoelectronic elements on SAW. In particular, instead of the intermediate frequency filter (IF), which in most cases is implemented with the help of "coil " products (LC circuits), the CSF (concentrated selection filter) is proposed to be a filter on the characteristic curve, and instead of the same traditional frequency detector (FD) – a FD with by a phase-shifting delay line (DL). Both SAW devices are integrated into the VHF radio path, the main characteristics of the path are given.