| 摘要 |
PURPOSE:To prevent leakage of a radio wave of a common antenna by providing a choke circuit which can be used in common for >=2 frequencies, on the rear face of a panel, against a panel gap. CONSTITUTION:In an equivalent circuit which provides choke circuits 8a, 8b on a panel gap 5 of a reflector panel 3, Ej is electric field strength of a radio wave which is made incident to the gap 5, and A-A' corresponds to the panel surface. Y0 and Y are admittance for seeing the panel surface and the rear face, and Y1 and Y2 are admittance for seeing the panel rear face. That is to say, the admittances corresponding to the circuit 8a, 8b are Y1 and Y2, and when the admittances Y1, Y2 of the circuits 8a, 8b are designed so as to become near the infinity, respectively, to the frequencies fa, fb, to be used, the gap 5 is short-circuited electrically to the frequencies fa, fb, and scattering and leakage by the gap 5 can be reduced equivalently. |
