PRINTED CIRCUIT BOARD FOR A RADIO LOCATION APPARATUS FOR MEASURING THE FILLING LEVEL WITH A WAVEGUIDE INPUT Russian patent published in 2021 - IPC H05K1/00 G01S13/02 G01F23/28 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement of filling levels, e.g., in tanks. The result is achieved by the fact that in the printed circuit board (10) for a radio location apparatus for measuring the filling level with a printed circuit board substrate (12), a microwave signal is introduced into the waveguide (12) through a microwave conductor (16). The connecting area (22) on the front side (18) of the printed circuit board substrate (12) is used for positioning the waveguide (14). The shape of the volumetric resonator is inversely formed due to the fact that an annular circumferential recess (30) is formed on the back side (28) of the substrate (12), wherein the wall of said recess has a microwave-reflecting coating (32). The recess (30) on the back side (28) of the substrate, together with the area surrounded by the recess (34), form a resonator for the introduced microwave signals.

EFFECT: increase in the mechanical stability and electromagnetic reliability and precision of a radio location-based or microwave-based apparatus for measuring the filling level.

15 cl, 7 dwg