Wave transmission lines and networks – Coupling networks – Wave filters including long line elements
Patent
1989-04-27
1991-06-18
LaRoche, Eugene R.
Wave transmission lines and networks
Coupling networks
Wave filters including long line elements
333203, 333246, H01P 1203
Patent
active
050252356
ABSTRACT:
A microstripline interdigital planar filter has a number of microstripline coupled resonators in an inhomogeneous medium consisting a soft dielectric substrate, and a high dielectric constant, high Q ceramic superstrate. The resonators are printed on the soft substrate as thick copper strips. The rectangular shaped, silver-coated aluminum housing dimensions are chosen so as to give the highest available unloaded Q factor of the resonators. The high dielectric constant of the superstrate is chosen so as to give a very small resonator length resulting in a very small filter size. The input and the output ports are located at right tapping points on the two outermost resonators. The tapping points are chosen so as to match the loaded Q factor of the filter. Previous filters are physically larger and cannot achieve the same high level of performance characteristics as filters of the present invention.
REFERENCES:
patent: 3579152 (1971-05-01), Moore
patent: 4418324 (1983-11-01), Higgins
patent: 4578656 (1986-03-01), Lacour et al.
patent: 4638271 (1987-01-01), Jecko et al.
Wong, "Microstrip Tapped-Line Filter Design", IEEE Trans. on Microwave Theory & Techniques, vol. MTT-27, No. 1, Jan. 1979, pp. 44-50.
Com Dev Ltd.
Ham Seung
LaRoche Eugene R.
Schnurr Daryl W.
LandOfFree
Microstripline interdigital planar filter does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Microstripline interdigital planar filter, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Microstripline interdigital planar filter will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-147556