Patent · US Active

Very wide bandwidth composite bandpass filter with steep roll-off

US9762208B2 · kind B2 · utility

13Cited by

23References

18Claims

0Family size

Assignee

Avago Technologies General IP (Singapore) Pte. Ltd. · SG

Inventors

Hongya Xu · Taufkirchen, DE
Andriy Yatsenko · Munich, DE
Lueder Elbrecht · Munich, DE
Martin Handtmann · Riemerling, DE

Key dates

Filing date	Sep 30, 2015
Grant date	Sep 12, 2017
Priority date	—
Expiry date	Dec 30, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH03H7/1775
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A very wide bandwidth composite band pass filter with steep roll-off of a corresponding passband includes a band pass filter and a high-Q acoustic resonator. The band pass filter has a corresponding passband with a very wide bandwidth and a passband roll-off. The high-Q acoustic filter has a corresponding stopband with a roll-off steeper than the passband roll-off, the high-Q acoustic filter being connected in parallel with the band pass filter such that a portion of the stopband is within the passband of the band pass filter, forming a combined passband. A frequency range of the combined passband is approximately the same as a frequency range of the passband of the band pass filter, and a combined roll-off of the combined passband is steeper on one side than the passband roll-off of the band pass filter.

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