| 摘要 |
A dual stage filter providing a relatively deep notch whose attenuation versus frequency curve is asymmetrical. The filter consists of a helical transmission line one end of which is connected to electrical ground. The opposite end is connected to a variable piston capacitor whose remaining end is also connected to ground. The ungrounded junction of these two components is connected to an input connector through a series capacitor. An identical circuit is arranged and connected to the output connector. These two circuits are isolated from each other by a conductive partition and housing. A series inductor connects the input and output connector. A matching capacitor is connected in parallel across a portion of the series inductor.
|
