Precise and Fast Frequency Determination of Resonant SAW Sensors by a Low-Cost Six-Port Interferometer

Lurz F, Lindner S, Mann S, Linz S, Weigel R, Kölpin A (2016)

Publication Type: Conference contribution

Publication year: 2016

Publisher: IEEE

Pages Range: 369-374

Event location: Taipei

DOI: 10.1109/I2MTC.2016.7520390

Abstract

Surface acoustic wave (SAW) resonators are used for a broad range of wireless sensing applications, some of them having high demands on the resolution as well as the measurement update rate. This paper presents a new interrogation method for precise and fast frequency determination of passive SAW resonators based on instantaneous frequency measurement (IFM) by a low-cost Six-Port interferometer. By using a delay line the frequency measurement is reduced to a phase measurement that can be instantaneously evaluated by the Six-Port structure. No complex signal processing is necessary providing high update rates and low hardware costs. A demonstrator in the 2.4 GHz frequency band shows the feasibility and the precision of the concept with measurement times of only a few microseconds.

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How to cite

APA:

Lurz, F., Lindner, S., Mann, S., Linz, S., Weigel, R., & Kölpin, A. (2016). Precise and Fast Frequency Determination of Resonant SAW Sensors by a Low-Cost Six-Port Interferometer. In Proceedings of the IEEE International Instrumentation and Measurement Technology Conference (I2MTC) (pp. 369-374). Taipei, TW: IEEE.

MLA:

Lurz, Fabian, et al. "Precise and Fast Frequency Determination of Resonant SAW Sensors by a Low-Cost Six-Port Interferometer." Proceedings of the IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Taipei IEEE, 2016. 369-374.

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