Anechoic chamber reflection localization using trilateration with a linear freqeuncy modulated signal

A method of testing a device under test using an anechoic chamber, comprising:

• propagating a plurality of electromagnetic waves from a transmitter located within the anechoic chamber, wherein each of the plurality of electromagnetic waves is associated with one of a plurality of configurations between the transmitter and a receiver in the anechoic chamber;
• receiving a plurality of reflections at the receiver from a reflective element in the anechoic chamber, wherein each of the plurality of reflections corresponds to one of the plurality of configurations;
• determining, for each of the plurality of reflections, an ellipse indicating a range of the reflective element;
• locating an intersection point of each of the ellipses to determine a location of the reflective element in the anechoic chamber;
• comparing a reflectivity of the reflective element to a threshold to obtain a calibration of the anechoic chamber;
• placing the device under test within the anechoic chamber;
• and
• correcting a subsequent testing of the device under test in the anechoic chamber using the calibration.

A system for validating an anechoic chamber, comprising:

• a transmitter within the anechoic chamber;
• a receiver within the anechoic chamber, the receiver movable within the anechoic chamber between a plurality of receiver locations to form a plurality of configurations between the transmitter and the receiver;
• a processor configured to:
• activate the transmitter to transmit an electromagnetic wave for each configuration between the transmitter and the receiver;
• receive a reflection at the receiver from a reflective element in response to each electromagnetic wave transmitted by the transmitter within the anechoic chamber, wherein each reflection corresponds to one of the plurality of configurations;
• determine a range ellipse corresponding to each reflection, the range ellipse indicating a range of the reflective element;
• locate an intersection point of each of the range ellipses to determine a location of the reflective element in the anechoic chamber;
• and
• compare a reflectivity of the reflective element to a threshold to validate the anechoic chamber.