Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Reexamination Certificate
2007-04-13
2008-11-11
Pascal, Robert J. (Department: 2817)
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
C333S206000, C333S207000, C333S224000, C333S232000
Reexamination Certificate
active
07449981
ABSTRACT:
A variable radio frequency band filter capable of varying the resonance frequency band comprises a housing having a support; a number of resonator rods arranged along the longitudinal direction of the housing; at least one tuning rod positioned on top of the resonator rods; a tuning support extending through the respective tuning rods along the longitudinal direction of the housing and adapted to slide on top of the respective resonator rods to vary the position of the tuning rods; and a frequency variation unit positioned on a lateral surface of the housing. The frequency variation unit being coupled to an end of the tuning support and adapted to vary the position of the tuning rods, as the tuning support is slid, according to the frequency band.
REFERENCES:
patent: 5184096 (1993-02-01), Wakime et al.
patent: 6147577 (2000-11-01), Cavey
patent: 6262639 (2001-07-01), Shu et al.
patent: 6353373 (2002-03-01), Liang
patent: 2000-295010 (2000-10-01), None
patent: 2001-127502 (2001-05-01), None
Kim Byung-Chul
Kim Duk-Yong
Kim Jae-Hong
Kim Kwang-Yeob
Kim Yon-Tae
Drinker Biddle & Reath LLP
Glenn Kimberly E
KMW Inc.
Pascal Robert J.
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