Dielectric filter unit comprising internal conductors and a slit

Details Dielectric filter unit comprising internal conductors and a slit Dielectric filter unit comprising internal conductors and a slit

1997-09-17

1999-09-14

Ham, Seungsook

Wave transmission lines and networks

Plural channel systems

Having branched circuits

333206, H01P 512, H01P 1205

Patent

active

059528974

ABSTRACT:
A miniaturized dielectric filter unit exhibiting desired characteristics is formed in which a plurality of resonators are disposed within a dielectric block. A plurality of internal conductors are disposed within the dielectric block. An external conductor and an input/output electrode are formed on an outer surface of the dielectric block. A slit having an electrode therein, which is electrically connected to the input/output electrode, is provided each of between two adjacent through-holes having the internal conductors therein. Thus, unwanted coupling between the input/output sharing filters is prevented, and an external coupling circuit is configured by capacitive coupling. It is thus possible to individually design the respective filters and further to enhance easy designing of the overall filter unit. A transmitting/receiving-sharing unit and a multiplexer, both of which are similar to the above-described dielectric filter unit, are also provided.

REFERENCES:
patent: 5250916 (1993-10-01), Zakman
patent: 5488335 (1996-01-01), Agahi-Kesheh et al.
patent: 5512866 (1996-04-01), Vangala et al.
patent: 5537082 (1996-07-01), Tada et al.
European Search Report dated Dec. 30, 1997.

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