MICROWAVE VECTOR REFLECTOMETER USING SELF-MIXING OSCILLATOR ANTENNAS | Zendy

P. Yoiyod | Zendy; Monai Krairiksh | Zendy

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MICROWAVE VECTOR REFLECTOMETER USING SELF-MIXING OSCILLATOR ANTENNAS

Author(s) -

P. Yoiyod,

Monai Krairiksh

Publication year - 2015

Publication title -

latin american applied research - an international journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.123

H-Index - 23

eISSN - 1851-8796

pISSN - 0327-0793

DOI - 10.52292/j.laar.2015.398

Subject(s) - circulator , microwave , materials science , dielectric resonator , gunn diode , dielectric , optics , mixing (physics) , resonator , optoelectronics , diode , antenna (radio) , electrical engineering , physics , engineering , telecommunications , quantum mechanics

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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