Design of a low loss SAW reflector filter with extremely wide bandwidth for mobile communication systems
Müller G, Machui J, Reindl L, Weigel R, Russer P (1993)
Publication Type: Journal article
Publication year: 1993
Journal
Publisher: IEEE
Book Volume: 41
Pages Range: 2147-2155
Journal Issue: 12
DOI: 10.1109/22.260699
Abstract
The design and performance of a low-loss surface acoustic wave (SAW) reflector filter are presented. The structure is a dual-track configuration incorporating two interdigital transducers (IDTs) and reflectors in each track. Extremely wide bandwidth can be obtained if chirped IDTs and reflectors are used. From the theoretical conditions for low-loss operation of the reflector filter, a design rule for the distances between the chirped components and for their lengths is derived. Because the transfer function of the filter is predominantly determined by the reflectors, a new synthesis method for chirped reflectors has been developed. For the design of the reflectors, phase-weighting and finger-width-weighting techniques were used to reduce passband distortions and improve the shape factor and stopband rejection. The filter has been fabricated on 128° YX-LiNbO3 . The center frequency and fractional bandwidth are 200 MHz and 100\%, respectively, the minimum insertion loss is 4 dB, a passband ripple is about 1 dB, and the stopband rejection is better than 35 dB
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Germany (DE)How to cite
APA:
Müller, G., Machui, J., Reindl, L., Weigel, R., & Russer, P. (1993). Design of a low loss SAW reflector filter with extremely wide bandwidth for mobile communication systems. IEEE Transactions on Microwave Theory and Techniques, 41(12), 2147-2155. https://doi.org/10.1109/22.260699
MLA:
Müller, Günter, et al. "Design of a low loss SAW reflector filter with extremely wide bandwidth for mobile communication systems." IEEE Transactions on Microwave Theory and Techniques 41.12 (1993): 2147-2155.
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