H - Electricity – 03 – H
Patent
H - Electricity
03
H
333/63
H03H 9/54 (2006.01) H01P 1/203 (2006.01)
Patent
CA 1264073
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.
590567
Com Dev Limited
Schnurr Daryl W.
LandOfFree
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