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US 2018/0123552 A1Published application
Filter arrangement with compensation of poor electrical ground
AssigneeEpcos AG
InventorLuigi ROSETTI
Life of this patent
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Abstract
In a filter arrangement comprising a frequency filter (F) that has a bad or non-ideal ground connection (GC1, 2, 3, 4, 5, 6, 7), the defects arising from bad ground are compensated by a capacitance (CC) coupled in parallel to the frequency filter. The value of the capacitance is chosen between 1 and 50 fF. The filter arrangement may be a receiving filter (RF) in a duplexer (DU).
Claims7
A filter arrangement, comprising
- a frequency filter (F) connected between a first and a second terminal T1,T2)
- the frequency filter being coupled to a non-ideal ground a capacitance (CC) coupled in parallel to the frequency filter (F)
- the value of the capacitance being chosen between 1 and 50 fF.
Dependencies are inferred from the claim text.