MICROWAVE VECTOR REFLECTOMETER USING SELF-MIXING OSCILLATOR ANTENNAS

Authors

  • P. YOIYOD
  • M. KRAIRIKSH

DOI:

https://doi.org/10.52292/j.laar.2015.398

Keywords:

Reflectometer, self-mixing oscillator, rectangular waveguide, dielectric properties, fruit classification

Abstract

This paper presents a microwave reflectometer using self-mixing oscillator antennas. A unique characteristic of the proposed reflectometer is its simple structure without a circulator and a directional coupler. Each self-mixing oscillator antenna utilizes a Gunn diode as an active device and a rectangular waveguide as a resonator and a radiator. The determination of dielectric properties of materials was carried out at 9.79 GHz and the measured results using the proposed reflectometer were in good agreement with those by a dielectric probe. In addition, the reflectometer has several industrial applications, e.g. fruit classification, moisture content sensing, etc.

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Published

2015-07-31

Issue

Vol. 45 No. 3 (2015): Latin American Applied Research

Section

Control and Information Processing

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