Antenna-integral high frequency circuit electromagnetically coupling feeder circuit connected to high frequency circuit to microstrip antenna via slot coupling hole

摘要

An antenna-integral high frequency circuit includes: a first grounding conductor (1) surrounding a microstrip antenna (2); a first via hole (9) connecting the first grounding conductor (1) and a second grounding conductor (4); and a second via hole (10) connecting the second grounding conductor (4) and a third grounding conductor (5) such that the distance from the second grounding conductor (4) to a fourth grounding conductor (21) is less than a predetermined value.