| 摘要 |
PROBLEM TO BE SOLVED: To reduce the ground in area and to transmit signals through a glass plate. SOLUTION: A signal transmission circuit 10 is divided into two parts, a first signal transmission part 11 for transmitting high-frequency signals from the output terminal 20out of a GPS antenna (antenna unit) 20 to the one surface 41 of a glass plate 40, and a second signal transmission part 12 for transmitting high-frequency signals from the other surface 42 of the glass plate 40 to the input terminal 30in of a GPS receiver main body 30. The first signal transmission part 11 is composed of a first coaxial cable 111, a pair of first electrodes 112, a first balanced line 113, and a first balun 114. The second signal transmission part 12 is composed of a second coaxial cable 121, a pair of second electrodes 122, a second balanced line 123, and a second balun 124.
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