U.S. Philips Corporation

Jan Snel

Cornelis W Berghout

Ludovicus Vugts

Gerardus J Janssen

Antonius Cjc Van De Acker-veken

Pieter W Jedeloo

Franciscus Ha De Jongh

Francis A Gys

A stripline filter is disclosed having two stripline resonators which are mutually coupled. In order to be able to influence the type of coupling, such as inductive, capacitive or a combination thereof, the distance between the stripline resonators changes along their length. If the stripline resonators are shorted at the end where the distance between them has a minimum value, then the coupling is substantially inductive. If the stripline resonators are open or capacitively loaded at the end where the distance between the resonators has a minimum value, then the coupling is substantially capacitive.

Stripline filter with stripline resonators of varying distance

Strip line filter, receiver with strip line filter and method of tuning the strip line filter. In ceramic filters for frequencies from 1 to 2 GHz, strip line resonators lying in one plane and coupled via the side are currently used in the state of the art. For reducing the attenuating effect of such a filter in the passband, the strip line resonators are arranged in two different planes and coupled via the broad side.

Strip line filter, receiver with strip line filter and method of tuning

A chip resistor having a value ranging from 10 Ohm to 100 kOhm and having a low temperature coefficient a low noise level and a high stability. The resistor is manufactured by means of the thin-fil technique. For this purpose, an NiCrAl-resistance layer is applied to one side of a flat ceramic support, and contact strips of Ni or an Ni-alloy, possibly preceded by an intermediate layer, are provided at two ends of the said support. An insulating lacquer layer is then applied to the resistance layer and partly overlaps the contact strips. The solderable supply strips are provided on the exposed metal portions.

Chip resistor and method for the manufacture thereof

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Roermond, Netherlands

Jan Snel