Broadband CRLH Beam Scanning Leaky-Wave Antenna Designed on Dual- Layer SIW
Keywords:
Beam scanning, Composite Right/Left Handed (CRLH), leaky-wave antenna, metamaterial, Substrate Integrated Waveguide (SIW)Abstract
This paper presents a broadband Composite Right/Left Handed (CRLH) leaky-wave antenna operating above the cutoff frequency based on the substrate integrated waveguide (SIW) is introduced. The proposed antenna consists of two dielectric layers, as the host of the structure, an interdigital capacitor radiation slot and a pair of twisted inductive post. The beam scanning capability of the leaky wave antennas will be achieved using CRLH, which allows radiation both in RH and LH regions. The design procedure begins with designing a unit-cell and evaluated with dispersion diagram. Based on the proposed unit-cell, the antenna structure consists of 10 units-cells, is developed at the X-band. The bandwidth of 66% has been obtained beside 105° of the beam steering angle both in the RH and LH regions, while the frequencies change from 6.5 GHz up to 9.5 GHz. The proposed antenna could be used in radar and imaging systems.
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References
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