RADIO-ELECTRONIC UNIT Russian patent published in 2003 - IPC

FIELD: radio electronics; receiving and processing signals from satellite radio-navigation systems. SUBSTANCE: radio-electronic unit has printed-circuit board with N≥6 conducting layers; outer conducting layers carry printed conductors, contact pads, electric and radio components and connector for external devices; inner layers are used to dispose printed conductors. Electric and radio components are grouped in regions of which first one is region of electric and radio components designed for reception and frequency conversion of signals; second region is that of electric and radio components meant for digital processing of signals. First and second ground shielding areas provided in second and (N - 1) conducting layers relate to first region. Power area and third ground shielding area, each being made in respective inner conducting layer, relate to second region. Power conductors concentrated in i-th inner conducting layer, where 2 <i <N + 1, are made in the form of printed conductors fanning out from center in the form of equipotential flat disposed within first region. Fan- out center is connected to output lead of first power filter whose input lead is connected by means of separate printed conductor to output lead of second power filter which is also connected to power area related to second region, Ground sections connected through respective metallized holes of interlayer connections to first and second ground shielding areas are made on free surfaces of conducting layers 3 to (N + 1) in the first region. EFFECT: provision for eliminating stray pickups and induced noise with various types of components densely disposed on board and fed from common power supply. 4 cl, 9 dwg