Saw filter using low-pass configuration and method of providing

Details Saw filter using low-pass configuration and method of providing Saw filter using low-pass configuration and method of providing

1997-08-25

1998-12-29

Pascal, Robert

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333133, 310313B, H03H 964, H03H 972

Patent

active

058545794

ABSTRACT:
An acoustic wave resonator filter (10) provides series and shunt resonator elements (22, 24) in a ladder network. The series elements (22) are configured in a lowpass configuration. The shunt elements (24) act as impedance inverters in a passband of the filter and they series resonate at an antiresonant frequency of the series elements (22) in a stopband which provides additional isolation. The electrodes (14) of the elements (22, 24) are of a metal thickness which improve the losses of a series resonant frequency in a passband which improves insertion loss. However, any increase in loss near the antiresonant frequency is compensated by the reduced loss near the resonant frequency of the shunt elements (24). The lowpass configuration and the aligned series element antiresonant frequency and shunt element resonant frequency provides good insertion loss, good isolation between transmitting and receiving bands, and maintains good stopband characteristics while reducing the number of elements required for the ladder network.

REFERENCES:
patent: 5434466 (1995-07-01), Hickernell et al.
patent: 5471178 (1995-11-01), Hickernell
patent: 5506552 (1996-04-01), Seki et al.
patent: 5600287 (1997-02-01), Kwan et al.
patent: 5638036 (1997-06-01), Penunuri et al.

Affiliated with

Also associated with

Rating

Saw filter using low-pass configuration and method of providing does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Saw filter using low-pass configuration and method of providing , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Saw filter using low-pass configuration and method of providing will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1427258