Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1985-06-07
1987-07-21
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333 33, 333219, 333234, 333235, 334 41, 334 45, H01P 120
Patent
active
046821317
ABSTRACT:
A helical filter is disclosed which includes a ground plane having microstrip transmission line segments to which a respective helical resonator coil is connected at the high impedance end thereof. A discrete capacitor is connected in parallel with each transmission line. A housing is provided with individual resonator compartments which effect associated distributed capacitance with the resonators themselves, which capacitance may be adjusted by included tuning screws. Conductors are connected to and form an integral part of a given two of said transmission lines and serve as the input and output for the helical filter. The transmission line and discrete capacitor pair provides the necessary impedance match, while the capacitor itself facilitates temperature compensation and frequency range selection.
REFERENCES:
patent: 3173111 (1965-03-01), Kallmann
patent: 3247475 (1966-04-01), Buetow et al.
patent: 3840828 (1974-10-01), Linn et al.
patent: 3936776 (1976-02-01), Sundquist
patent: 3970972 (1976-07-01), Bunner
patent: 4205286 (1980-05-01), Parish
patent: 4210884 (1980-07-01), Tabuchi et al.
patent: 4342969 (1987-08-01), Myers et al.
patent: 4361821 (1982-06-01), Dubovsky et al.
patent: 4422059 (1983-12-01), Fuji et al.
patent: 4459571 (1984-07-01), Fraser
patent: 4477785 (1984-10-01), Atia
Gillman James W.
LaRoche Eugene R.
Lee Benny
Motorola Inc.
Southard Donald B.
LandOfFree
High-Q RF filter with printed circuit board mounting temperature does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High-Q RF filter with printed circuit board mounting temperature, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High-Q RF filter with printed circuit board mounting temperature will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-209781