Patent · US Active

Band pass filter having parallel connected notch filter circuits

US10848126B2 · kind B2 · utility

2Cited by

2References

20Claims

0Family size

Assignee

Avago Technologies International Sales Pte. Limited · SG

Inventors

Bulent Alicioglu · Gernsheim, DE
Hongya Xu · Taufkirchen, DE
Martin Handtmann · Riemerling, DE
Lueder Elbrecht · Munich, DE

Key dates

Filing date	Oct 30, 2018
Grant date	Nov 24, 2020
Priority date	—
Expiry date	Dec 14, 2038

Classification

Technology area (CPC H)Electricity
CPC primaryH04B2001/1063
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A filter device provides a wideband passband of a communication device for a RF signal. The filter device includes a first filter circuit in parallel with a second filter circuit. The first filter circuit includes a first notch filter, and has a first notch. The second filter circuit includes a second notch filter in series with a reversal circuit for phase shifting the RF signal filtered by the second notch filter, the second filter circuit having a second notch. The first and second filter circuits form a band pass filter having a passband between a lower cutoff frequency defined by the second notch and an upper cutoff frequency defined by the first notch. The band pass filter provides low insertion loss in the passband, and high insertion loss in an adjacent lower stopband below the lower cutoff frequency and in an adjacent upper stopband above the upper cutoff frequency.

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