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http://dx.doi.org/10.3807/KJOP.2019.30.3.094

Squint-less Phased Array Antenna Near-field Subwavelength Focusing with True-time Optical Delay Line  

Jung, Young Jin (School of Electricity and Electronics, Ulsan College)
Publication Information
Korean Journal of Optics and Photonics / v.30, no.3, 2019 , pp. 94-100 More about this Journal
Abstract
The near-field subwavelength squint-less focusing system of a phased array antenna is designed and demonstrated by numerical simulation. The Huygens-Fresnel principle is applied to numerical simulation for calculation of the phased array antenna at microwave frequency. It was shown that beam squinting can be eliminated, utilizing true-time optical delay lines based on a chirped fiber grating in the proposed system. Furthermore, subwavelength focusing with high numerical aperture can be achieved by considering the fact that the array elements of the phased-array antenna can be treated as diffractive elements in an optical lens system. Also, side lobes can be suppressed by decreasing the distance between element antennas to less than half of the wavelength.
Keywords
Phased array antenna; Subwavelength focusing; True-time optical delay line;
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