Metasurface Lens-Integrated Rectangular Dielectric Resonator Antenna with Enhanced Gain

Abstract

This article proposes the design and realization of a metasurface lens-loaded rectangular-shaped dielectric resonator antenna (DRA) operating at 4.5 GHz with enhanced gain. The MS lens, loaded above the rectangular-shaped DRA at a height of H ≈ λ₀/2 from the DR block, contributes to a significantly higher gain (9.9 dBi) compared to the standalone DRA block (5.8 dBi) maintaining the overall size of the antenna as 0.90λ₀ × 1.05λ₀ × 0.53λ₀. The proposed DRA integrated with an MS lens is systematically designed in a commercial EM solver using theoretical guidelines followed by experimental characterization of the fabricated samples.

Appendix

Calculation of the Resonant Frequency of the Dielectric Resonator

(DRA parameters: w = 17 mm, d = 17 mm, h = 4.2 mm)

$$ b{ = 2}h{ = 8}{\text{.4 mm}} $$

(9)

$$ k_{x} = \frac{\pi }{w} \, = \, 184.705 $$

(10)

$$ k_{z} = \frac{\pi }{2b}{ = 373}{\text{.80}} $$

(11)

$$ k_{yo \, } = \, \sqrt {k_{x}^{2} + k_{z}^{2} } { = 416}{\text{.9 }} $$

(12)

$$ d = \frac{2}{{k_{y} }}\tanh \left( {\frac{{k_{y0} }}{{k_{y} }}} \right) \, \Rightarrow \, k_{y} { = }118 $$

(13)

$$ f_{0} = \frac{c}{{2\pi \sqrt {\varepsilon_{r} } }}\sqrt {k_{x}^{2} + k_{y}^{2} + k_{z}^{2} } { = 4}{\text{.8 GHz}} $$

(14)