Narrow bandwidth microstrip filter

Details Narrow bandwidth microstrip filter Narrow bandwidth microstrip filter

H - Electricity

01

P

333/71, 328/0.6

H01P 1/203 (2006.01)

Patent

CA 1215754

NARROW BANDWIDTH MICROSTRIP FILTER Abstract An interdigital microstrip transmission line filter (100) includes three electrically conductive strips (104, 106 and 108) each coupled to grounded portions (110 and 120) on one end and coupled to respective capacitive loading pads (112, 116 and 114) on the other end. Input and output pads (130 and 140) may be coupled to signals from other circuitry located off or on the same substrate (150). Grounded portion (110) extends between capacitive loading pads (112 and 114) for minimizing undesired coupling between non-adjacent strips (104 and 108). As a result, the unique microstrip filter (100) has a frequency response that is substantially devoid of passband transmission zeros.

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