| 摘要 |
PROBLEM TO BE SOLVED: To prevent a VSWR characteristic from deteriorating due to a received signal leaked to an LNB supply line. SOLUTION: A noise elimination capacitor whose capacitance is about 1,000 pF and a capacitor to supply a high frequency component leaked to the LNB supply line to ground, whose capacitance is about 1 pF are provided between the LNB voltage supply line and ground. A capacitor 13 whose capacitance is about 1,000 pF eliminate a noise component passing through the LNB voltage supply line 15. The capacitor 14 whose capacitance is about 1 pF bypasses the high frequency signal component leaked via a choke coil 12 to decrease the impedance of a node NA over a broadband thereby preventing the VSWR from deteriorating due to occurrence of a reflected wave at the node NA.
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