Wireless surface acoustic wave temperature measurement system reader-writer
A surface acoustic wave and reader-writer technology, which is applied in the field of wireless surface acoustic wave temperature measurement system reader-writer, can solve the problems of long resonance propagation distance, large and complex test system, and inability to measure temperature, so as to maintain the frequency Compact and stable effect
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[0027] A specific embodiment of the present invention: a reader / writer for a wireless surface acoustic wave temperature measurement system, the reader includes a sending signal generating unit, a sending signal amplifying unit, a sending signal bandpass filter, a radio frequency switch, and a local oscillator , a received signal band-pass filter, a low noise amplifier, a filter, an intermediate frequency amplifier, an analog-to-digital conversion module, a digital signal processing module and a plurality of antenna terminals. The present invention will be further described below in conjunction with the accompanying drawings.
[0028] like figure 1 As shown, the scheme of the present invention consists of a sending signal generating unit 101, a sending signal amplifying unit 102, a sending signal bandpass filter 103, a radio frequency switch 104 (selection time 1.2-2us), a crystal oscillator 105, a local oscillator 106, a receiving signal band Pass filter 107, low noise ampli...
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