RADIO ELECTRONIC UNIT Russian patent published in 2001 - IPC

FIELD: radio electronics, design of radio electronic units for reception and processing of signals of satellite radio navigation systems. SUBSTANCE: technical result of invention lies in elimination of stray pick-ups and induced noise under conditions of arrangement of heterogeneous electric radio elements of various degree of integration working with analog and digital signals in frequency range from thousands of Mhz to units of Hz placed on multilayer printed circuit board. Signals of satellite radio navigation system are received by antenna which is fed through radio electronic unit. Radio electronic unit has multilayer printed circuit board with number of conducting layers N≥6, in which electric radio elements are grouped in M zones. First zone is zone of functional arrangement of analog electric radio elements and high-frequency connector intended for connection of antenna. Following zones are zones of functional arrangement of digital electric radio elements and of at least one low-frequency connector intended for connection of external devices. Ground planes of first zone are located in two inner conducting layers adjacent to outer conducting layers. Ground planes of following zones are located in one of inner conducting layers adjacent to one of outer conducting layers. These ground planes are intercoupled by printing and are coupled to ground plane of first zone located in same layer. Supply conductors of first zone are positioned in i-th conducting layer located between second and N- 1-th conducting layers. Supply conductor of third and following zones coming in the form of planes are located in jth conducting layer, where j≠i Additional connector meant for connection of separate power supply source of antenna is also placed on multilayer printed circuit board. EFFECT: elimination of stray pick-ups and induced noise. 6 cl, 11 dwg