| 摘要 |
The present invention prevents a receiving signal from leaking to an LNB supply line to thereby deteriorate input VSWR characteristic. A capacitor of about 1000 pF for removing noise and a capacitor of about 1 pF for flowing a high frequency component which leaks to an LNB voltage supply line to the ground, are provided between the LNB voltage supply line and the ground. By the capacitor of about 1000 pF, a noise component included in the LNB voltage supply line is removed. Further, by the capacitor of about 1 pF, the high frequency signal component which leaks via a choke coil is bypassed to thereby reduce impedance of a node NA over a broad band and prevent a reflecting wave from being produced at the node NA and input VSWR from being deteriorated.
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