EP 0015610 B1 19840926 - MICROWAVE IMAGE-FREQUENCY REFLECTING FILTER AND MICROWAVE RECEIVER COMPRISING SUCH A FILTER
Title (en)
MICROWAVE IMAGE-FREQUENCY REFLECTING FILTER AND MICROWAVE RECEIVER COMPRISING SUCH A FILTER
Publication
Application
Priority
FR 7905735 A 19790306
Abstract (en)
[origin: US4313097A] A planar image reflection mode filter is provided for reflecting parasitic signal frequencies produced in the mixer of a receiver. The filter includes a reflecting quarter-wavelength filter and an adaptive circuit functioning to enable the transmission of desirable frequencies. A slot can be formed in the quarter-wavelength filter to enable odd-mode resonance and reduce the width of a transition frequency band lying between a reflection band and a transmission band.
IPC 1-7
IPC 8 full level
H01P 1/203 (2006.01); H01P 7/08 (2006.01)
CPC (source: EP US)
H01P 1/2039 (2013.01 - EP US); H01P 7/082 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB IT
DOCDB simple family (publication)
EP 0015610 A1 19800917; EP 0015610 B1 19840926; DE 3069254 D1 19841031; FR 2451110 A1 19801003; FR 2451110 B1 19840511; JP S55121702 A 19800919; JP S6340361 B2 19880810; US 4313097 A 19820126
DOCDB simple family (application)
EP 80200158 A 19800226; DE 3069254 T 19800226; FR 7905735 A 19790306; JP 2743480 A 19800306; US 12507780 A 19800227