I‐Q imbalance correction of microwave displacement sensors. Issue 13 (8th June 2015)

• Record Type: Journal Article
• Authors: Pieraccini, M.; Papi, F.; Donati, N.
• Is Part Of: Electronics letters. Volume 51:Issue 13(2015)
• Page Start: 1021
• Page End: 1023
• Publication Date: 2015-06-08
• Subjects: microwave measurement -- displacement measurement -- microwave detectors -- calibration -- oscillators; I‐Q imbalance correction -- microwave displacement sensor -- vital sign detector -- structural vibration detector -- electronic board -- calibration method -- external mechanical oscillator -- metallic bar -- X‐band transceiver -- seismic accelerometer; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2015.0982
• Languages: English
• ISSNs: 0013-5194

Abstract

Abstract : Microwave displacement sensors are becoming increasingly popular as vital sign detectors and structural vibration detectors. Until now there is not any method known for calibrating them that does not require accessing the electronic board by inserting and probing test signals or does not require cumbersome equipment that is able to provide large linear displacements. Hence, proposed is a calibration method for I‐Q correction that makes use only of an external mechanical oscillator (a metallic bar fixed at an edge). As a test device, a low‐quality X‐band transceiver with a strong imbalance has been used. The calibrated sensor is compared successfully with a high‐performance seismic accelerometer.