Patent · US Expired

Reactance filter with surface wave resonators

US6246302A · kind A · utility

6Cited by

7References

16Claims

0Family size

Assignee

Siemens Matsushita Components GmbH & Co. KG · DE

Inventors

Peter Muller · Prien am Chiemsee, DE
Maximilian Pitschi · Rottach-Egern, DE

Key dates

Filing date	Mar 19, 1999
Grant date	Jun 12, 2001
Priority date	—
Expiry date	Mar 19, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH03H9/14526
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A reactance filter, particularly in a branching circuit (ladder type),with surface wave resonators wherein omission weighted normal finger transducers are employed between reflectors such that the arrangement and plurality of the active fingers of the interdigital transducer are particularly formed for changing the capacitance relationship (static to dynamic capacitance) such that a narrow filter bandwidth is achieved.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.