Patent ID: 6246301
Filing Date: 2001-06-12
Classification: H05K

Abstract:
A high-frequency circuit apparatus comprising:two high-frequency circuits (2,3) mounted on a printed circuit board (1);two rows of first plated through holes (6) which connect upper and lower ground plates (4, 5) on upper and lower surfaces of the printed circuit board (1) and which are arrayed in a first direction so that the two high-frequency circuits (2, 3) are disposed between the first plated through holes; and,at least two columns of second plated through holes (7) which are arrayed in a second direction different from the first direction between the two high-frequency circuits to connect the ground plates on the upper and lower surfaces of the printed circuit board, wherein the rows of the first plated through holes (6) and the ground plates (4, 5) constitute a waveguide which prevents interference with a signal external to the high-frequency circuit apparatus;the second plated through holes (7), those of the first plated through holes that are located on an extension of the second plated through holes in the second direction, and the ground plates (4, 5) constitute a waveguide resonator whose resonance frequency is identical to an intermediate frequency of signal frequency bands of the two high-frequency circuits (2, 3) and which prevents signals in the signal frequency bands of the high-frequency circuits (2, 3) from passing therethrough.