SAW delay lines for wirelessly requestable conventional sensors

Abstract

Programmable reflectors of SAW ID-tags

Wireless neural probes based on one-port SAW delay line and neural firing-dependent varicap diode

“…The one-port SAW delay line is consisted of inter-digital transducers (IDTs) connected to an antenna, shorted-grating reflector as reference, and split-type reflectors connected with varicap diode C load , which makes wireless and battery-free measurement system possible. A change in the voltage-controlled capacitance C load by electrical neural pulses induces perturbation of the reflected responses at split-type reflector on one-port SAW delay line as follows [20][21][22][23][24],…”

Elektrodinaminių lėtinimo įtaisų tyrimas taikant lygiagrečiąsias kompiuterines sistemas

“…Meandrinių lėtinimo įtaisų konstrukcijos gali būti labai įvairios (Kabiri et al 2010;Steindl et al 1998). Meandrinio laidininko matmenys išilgai viso lėtinimo įtaiso gali būti vienodi, arba turėti periodiškai pasikartojančius laidininko susiaurėjimus bei praplatėjimus.…”

Pressure and Temperature Microsensor Based on Surface Acoustic Wave in TPMS

“…Since the sensor was sensitive to both pressure and temperature, it was affected by cross-disturbance. In 1998, Reinhard Steindl and Alfred Pohl designed the SAW hybrid sensor based on the combination of the SAW delay line and the conventional pressure sensor (Steidl et al, 1998). This sensor could measure both pressure and temperature, and its precision was high, but there were questions in practical realization and signal processing.…”

“…Another sensor device, which changes its impedance under the influence of the quantity to be sensed, is attached to a second IDT acting as reflector structure. This load impedance determines the amplitude and phase of the reflected SAW burst (Steidl et al, 1998). The velocity of a SAW is approximately the factor 100 000 smaller than the velocity of light or radio signals.…”