Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2011-06-07
2011-06-07
Lee, Benny (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S203000, C333S219100
Reexamination Certificate
active
07956707
ABSTRACT:
An apparatus for coupling a combline resonator and a ceramic resonator, including one or more of the following: a housing; a combline resonator in the housing; a ceramic resonator in the housing, the ceramic resonator having a stem portion and a mushroom portion; a ridge extending between the combline resonator and the ceramic resonator, the ridge passing between the mushroom portion of the ceramic resonator and the housing, wherein a coupling is obtained between an electrical field of the combline resonator and an electrical field of the ceramic resonator.
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Bhargava, A., Time & Frequency, Combline Filter Design Simplified, Jan. 2004, pp. 42, 44, 46 and 48, www.rfdesign.com.
Kramer & Amado P.C.
Lee Benny
Radio Frequency Systems Inc.
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