| 摘要 |
PROBLEM TO BE SOLVED: To provide a signal power synthesizer capable of efficiently synthesizing a received signal received by a first antenna and a received signal received by a second antenna and providing a synthesized output. SOLUTION: The first and second antennas 10, 21 comprising folded dipole antenna elements are connected to a signal power synthesizing section 13 via feeding cables 15a, 15b whose impedance is respectively about 200 ohms. In the signal power synthesizing section 13, a first matching antenna 13a is connected to one of the feeding cables 15a, 15b and a second matching antenna 13b is connected to the other. Then the impedance of the feeding cables 15a, 15b connected in parallel is converted into an unbalanced impedance of about 75 ohms by a 1:1 balun 13c. The received signals of the first and second antennas 10, 21 are combined by the signal power synthesizing section 13 and a synthesized signal is output from a coaxial terminal 14 via a coaxial cable 15c connected to the balun 13c. COPYRIGHT: (C)2007,JPO&INPIT
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