| 摘要 |
PROBLEM TO BE SOLVED: To provide a cobra antenna which is small, has a superior antenna gain performance, and receives minimum influence from the length of a coaxial wire.SOLUTION: An antenna element 2 having a length corresponding to a frequency of a broadcast wave to be received and a coaxial wire 5 are connected to a relay unit 3 which functions as a feeding point Fp. A ferrite core 4 around which the axial wire 5 is wound one to three times is arranged at a position in the axial wire 5 which is spaced from the relay unit 3 by the same length as the length from the relay unit 3 to the antenna element 2, and a ferrite core 4a which functions as a high frequency blocking unit for blocking a high frequency current from the coaxial wire 5 is provided on the front side of a connector 6 of a receiving device 8 to which the other side of the coaxial wire 5 is connected. |
