Work

Ascertaining Operating Points of Harmonic Transponders Using Intermodulation Responses

Year: 2024

Type: article

Abstract: Harmonic transponders are nonlinear, passive devices that typically receive an interrogation signal at one single frequency and reradiate harmonics. In this work, we propose leveraging the device’s nonlinearity by interrogating with two closely spaced signals and then measuring the second harmonics and nearby second and fourth intermodulation distortion products. Our results show that we are able to remotely determine the power incident at the device, over a 25 dB range and within ±1 dB, using only the relative ratios between these received components. This result has applications in characterizing the loss of unknown channels and in conducting over-the-air characterization of fully integrated transponders. We demonstrate this latter application.

Source: IEEE Open Journal of Antennas and Propagation

DOI: 10.1109/ojap.2024.3445300

Authors: Jeff Frolik, Elsie Anthonio, Rye Fought, Tara Harte

Institution: University of Vermont

Language: English

Topic: Advanced Power Amplifier Design

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $1,995

Funder: National Institute of Food and Agriculture