| 摘要 |
<p>PROBLEM TO BE SOLVED: To miniaturize the transmitter-receiver itself, to simplify the structure and to reduce the manufacture cost by realizing sufficient transmission reception isolation in spite of the simple configuration. SOLUTION: A transmission section 18 having a transmission filter section 14 and a transmission antenna section 16 connected to the transmission filter section 14 and a reception section 24 consisting of a reception filter section 20 and a reception antenna section 22 connected to the reception filter section 20 are integrally formed on a dielectric board 12. The transmission filter section 14 has a configuration where resonance elements 30a-30c are formed respectively in parallel, and the transmission antenna section 16 has an antenna 32 formed with an electrode film on an upper face of the dielectric board 12. The reception filter section 20 has a configuration where resonance elements 34a-34c are formed respectively in parallel, and the reception antenna section 22 has an antenna 36 formed with an electrode film on an upper face of the dielectric board 12.</p> |
