Patent ID: 11898987
Assignee: RAYTHEON COMPANY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 18:
19. A method comprising:
providing a flow of air to one or more surface acoustic wave (SAW) sensors; and
detecting one or more biological analytes in the flow of air using the one or more SAW sensors;
wherein at least one of the one or more SAW sensors comprises:
a piezoelectric substrate;
first and second interdigitating transistors over the piezoelectric substrate, the first interdigitating transistor configured to convert an input electrical signal into an acoustic wave, the second interdigitating transistor configured to convert the acoustic wave into an output electrical signal, the piezoelectric substrate configured to transport, the acoustic wave; and
a detection layer over the piezoelectric substrate and positioned at least partially between the first and second interdigitating transistors, the detection layer comprising (i) antibodies configured to bind to the one or more biological analytes and (ii) a hydrogel layer over the antibodies; and

wherein, in each of the one or more SAW sensors:
each of the first and second interdigitating transistors comprises multiple conductive fingers; and
the detection layer extends between and into the first and second interdigitating transistors such that portions of the detection layer are positioned between the multiple conductive fingers in each of the first and second interdigitating transistors.