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Design, Fabrication, and application of precise delay lines at 2.45 GHz

Ruppel CCW, Reindl L, Berek S, Knauer U, Heide P, Vossiek M (1996)

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Publication Language: English

Publication Type: Conference contribution

Publication year: 1996

Journal

Publisher: Institute of Electrical and Electronics Engineers

Edited Volumes: Proceedings of the IEEE Ultrasonics Symposium

Book Volume: 1

Pages Range: 261-265

Conference Proceedings Title: IEEE International Ultrasonics Symposium

Event location: San Antonio, USA

DOI: 10.1109/ULTSYM.1996.583970

Abstract

For years linear optimization algorithms have been used successfully in bandpass filter design. This method has been adopted for the design of dispersive interdigital transducers (IDTs) for pulse compression filters with low time-bandwidth products, and for the design of delay lines with linear phase. Now this method has been extended to the design of dispersive IDTs operating at higher harmonics. As examples, delay lines at 2.45 GHz operating at the fundamental and third harmonic with relative bandwidths up to 30% will be presented. The delay lines operating at the fundamental harmonics were fabricated on the rotated cut of LiNbO3 and had normal fingers only. The relative height of the metallization was chosen for minimum reflections. Minimum linewidth of 0.3 μm were necessary. The delay lines operating at the third harmonic had split fingers for canceling reflections. Therefore minimum linewidths of approximately 0.45 μm had to be realized. Measured and calculated frequency responses of these delay lines will be compared with each other. Taking advantage of the reported delay lines, a novel FMCW radar system incorporating a 2.45 GHz SAW reference path is established. The proposed SAW based system achieves a higher dynamic range than the conventional FMCW radar sensors.

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How to cite

APA:

Ruppel, C.C.W., Reindl, L., Berek, S., Knauer, U., Heide, P., & Vossiek, M. (1996). Design, Fabrication, and application of precise delay lines at 2.45 GHz. In IEEE International Ultrasonics Symposium (pp. 261-265). San Antonio, USA: Institute of Electrical and Electronics Engineers.

MLA:

Ruppel, C. C. W., et al. "Design, Fabrication, and application of precise delay lines at 2.45 GHz." Proceedings of the Proceedings of the 1996 IEEE Ultrasonics Symposium. Part 2 (of 2), San Antonio, USA Institute of Electrical and Electronics Engineers, 1996. 261-265.

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