Wide bandwidth bandpass filter comprising parallel connected pie

Details Wide bandwidth bandpass filter comprising parallel connected pie Wide bandwidth bandpass filter comprising parallel connected pie

1992-01-29

1994-03-15

Lee, Benny

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333189, 333192, 310320, H03H 958

Patent

active

052948986

ABSTRACT:
A plurality of piezoelectric resonators (10,32,37,57,62,66,79,88,93) are utilized to form a bandpass filter (31,56,78). The resonators (10,32,37,57,62,66,79,88,93) are connected in parallel to form a plurality of parallel paths between an input (43,73,81) and an output (47,74,82) of the filter (31,56,78). A predetermined number of the piezoelectric resonators (10,32,37,57,62,66,79,88,93) provide a phase shift of approximately 180 degrees. Each parallel path has a passband and center frequency that is displaced from the passband and center frequency of other paths. Consequently, the passband of each parallel path algebraically sums and creates a filter passband that is wider than the passband of each of the filter's individual parallel paths.

REFERENCES:
patent: 2194539 (1940-03-01), Barry et al.
patent: 2429639 (1947-10-01), McSkimin
patent: 2878454 (1959-03-01), Leming et al.
patent: 2980872 (1961-04-01), Storch
patent: 3487318 (1969-12-01), Herman
patent: 3566313 (1971-02-01), Yuki et al.
patent: 3697788 (1972-10-01), Parker et al.
patent: 3838366 (1974-09-01), Coussot
patent: 5034753 (1991-07-01), Weber
patent: 5057801 (1991-10-01), Kittaka et al.
Balloto, A., & Lukaszek T.; "A Novel Frequency Selective Device: The Stacked Crystal Filter"; Proc 27th Ann Freq Control Syposium; Cherry Hill, N.J.; 12-14 Jun. 1973, pp. 262-269.
Rosenbaum et al; "Design & Fabrication of Two Pole Monolithic Bulk Acoustic Filters"; IEEE Microwave & MM Wave Circuits Syposium; 1988, pp. 63-66.
Lakin et al; "Stacked Crystal Filters Implemented with Thin Films"; IEEE Symposium on Freq Control; Jun. 1989; pp. 536-543.
Dworsky, L.; "A Comparison of Band Pass Filter Technologies for Communication Systems"; IEEE Ultrasonic Syposium; 5 Dec. 1991.

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