Title :
Modular two-dimensional analysis of SAW filters. II. Analysis and compensation results
Author :
Visintini, Giuliano ; Kappacher, Christian ; Ruppel, Clemens C W
Author_Institution :
Siemens, AG, Munich, Germany
Abstract :
For pt.I see ibid vol.39, no.1, pp.61-72 (1992). Physical effects causing distortions of the transfer function of a broadband (36% fractional bandwidth) spectrum shaping filter for digital radio with 16 quadrature amplitude modulation (QAM) are analyzed separately and connected with the modular two-dimensional (2-D) model described in Part I, demonstrating the importance of every single effect. A compensation of the second-order effects is performed, yielding an agreement between simulation and measurement in amplitude and phase of more than +or-0.1 dB and +or-1 degrees all over the passband. The stopband is also predicted with high accuracy.<>
Keywords :
compensation; digital radio systems; surface acoustic wave filters; transfer functions; ultrasonic diffraction; ultrasonic refraction; SAW filters; broadband spectrum shaping filter; compensation; digital radio; modular 2D analysis; passband; quadrature amplitude modulation; second-order effects; stopband; transfer function distortion; Bandwidth; Digital communication; Digital filters; Passband; Performance evaluation; Phase measurement; Quadrature amplitude modulation; SAW filters; Transfer functions; Two dimensional displays;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
