RF calibration of saw interrogators
First Claim
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1. A method for calibrating a SAW interrogator, comprising the steps of:
- providing a SAW interrogator having a transmitter portion, a receiver portion, and a control portion;
providing an independent receiver;
positioning said SAW interrogator and independent receiver in a predefined spaced relationship;
transmitting a signal at a predetermined frequency and power level from the transmitter portion of the SAW interrogator;
receiving the signal transmitted from the transmitter portion of the SAW interrogator by the independent receiver;
measuring selected characteristics of the signal received by the independent receiver; and
comparing the measured characteristics of the signal received by the independent receiver to a first set of predetermined reference values,whereby the result of the step of comparing provides an indication of the operational characteristics of said interrogator.
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Abstract
Disclosed is an apparatus and methodology for insuring measurement accuracy and performance reliability in the operation of devices employed to interrogate SAW devices. The present subject matter relates to an arrangement and methodology that provides an interrogator paired together with a separate receiver, which may comprise a second interrogator, functioning together to perform a self-testing operation. The interrogator may be a handheld device that is temporarily paired with a separate receiver or a like device or the interrogator may correspond to more or less permanently paired set of devices physically placed in an array.
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Citations
7 Claims
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1. A method for calibrating a SAW interrogator, comprising the steps of:
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providing a SAW interrogator having a transmitter portion, a receiver portion, and a control portion; providing an independent receiver; positioning said SAW interrogator and independent receiver in a predefined spaced relationship; transmitting a signal at a predetermined frequency and power level from the transmitter portion of the SAW interrogator; receiving the signal transmitted from the transmitter portion of the SAW interrogator by the independent receiver; measuring selected characteristics of the signal received by the independent receiver; and comparing the measured characteristics of the signal received by the independent receiver to a first set of predetermined reference values, whereby the result of the step of comparing provides an indication of the operational characteristics of said interrogator. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification