| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the small sized inexpensive plane antenna module with an excellent characteristic by providing a plane antenna on a single dielectric board and arranging a ferrite and a magnet on the surface of the dielectric board of a feeding part of the plane antenna to form a circulator thereby mounting the plane antenna and the circulator on the dielectric board. SOLUTION: Three patches 4A, 4B, 4C on a dielectric board 2 are connected by feeders 5A, 5B. Furthermore, a feeder 5D connecting to a plane antenna 4C, a feeder 5E feeding a transmission signal to the plane antenna, and a feeder 5F to feed a reception signal from the plane antenna are formed on a ferrite board 3. A circulator is formed by the feeders 5D, 5E, 5F with magnets 7A, 7B inbetween, and a DC magnetic field is applied to the feeders 5D, 5E, 5F, a transmission signal received by the feeder 5E is branched to the feeder 5D and a reception signal from plane antennas 4A, 4B, 4C is branched only the feeder 5F.</p> |
