Minimum order UHF TV coupled-cavities broadcasting filter

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(11)

EP 1 258 941 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	27.08.2003 Bulletin 2003/35

(43)	Date of publication A2:
	20.11.2002 Bulletin 2002/47

(21)	Application number: 02425250.4

(22)	Date of filing: 22.04.2002

(51)	International Patent Classification (IPC)⁷: H01P 1/205

(84)	Designated Contracting States:
	AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
	Designated Extension States:
	AL LT LV MK RO SI

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Priority:

18.05.2001 IT SO20010002

(71)	Applicant: Comtech S.r.l.
	23018 Talamona (SO) (IT)

(72)	Inventor:
	Valenti, Daniele 23018 Via Erbosta (IT)

(54)	Minimum order UHF TV coupled-cavities broadcasting filter

(57) UHF TV broadcasting band pass filter featuring four cylindrical square-cavity resonators with generalized couplings and Cascade Quadruplet configuration with a sign reversal between the middle resonators, the filter end sections being coupled to the input and output connectors by means of adjustable rotating probes.

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