| 摘要 |
A filter, for use with a delay compensating circuit in a delay line filter, formed from co-located capacitors. The capacitors may be formed as traces disposed on a circuit card and co-located to provide capacitive coupling to each other and ground. Proximity coupling wires are connected at one end to capacitive traces, and at the other end hang in mid-air above the next adjacent capacitive trace. The distance between each proximity coupling wire and the neighboring capacitive trace can be varied to control the capacitance coupling between neighboring capacitive traces. The filter is thus tuned by controlling the distances between the proximity coupling wires, and by squeezing or stretching the inductors. The shunt coils control the frequency of the filter, while the series of capacitive traces control the bandwidth.
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