Title :
A wide-band low-shape-factor amplifier module using an acoustic surface- wave bandpass filter
Author :
Cheek, Tom F., Jr. ; Hays, Ronald M., Jr. ; Hartmann, Clinton S.
Abstract :
An amplifier module using a novel surface-wave bandpass filter for a spread spectrum communication receiver has been designed to realize wide-band low-shape-factor requirements. This module with a center frequency of 168 MHz has a midband gain of 6 dB, a 7.1 percent fractional bandwidth (3-dB bandwidth of 12 MHz), and an extremely low-shape factor of 1.32 to 1 (ratio of 3 to 40-dB bandwidth). Excellent agreement is cited between the theoretical frequency and impulse responses of the surface-wave bandpass filter and its measured performance.
Keywords :
Acoustic surface wave devices; Band-pass filters; High-frequency amplifiers; Radio receivers; Radiofrequency amplifiers; Ultra-high-frequency amplifiers; Wideband amplifiers; acoustic surface wave devices; band-pass filters; high-frequency amplifiers; radio receivers; radiofrequency amplifiers; ultra-high-frequency amplifiers; wideband amplifiers; Acoustic waves; Band pass filters; Broadband amplifiers; Circuits; Diodes; Frequency; Optical amplifiers; Plasma devices; Pulse amplifiers; Surface acoustic waves;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1973.1050347
