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1D-Leaky Wave Antenna Employing Parallel-Plate Waveguide Loaded With PRS and HIS

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5 Author(s)
Garcia-Vigueras, M. ; Dept. of Commun. & Inf. Technol., Tech. Univ. of Cartagena, Cartagena, Spain ; Gomez-Tornero, J.L. ; Goussetis, G. ; Weily, A.R.
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A new type of one-dimensional leaky-wave antenna (LWA) with independent control of the beam-pointing angle and beamwidth is presented. The antenna is based on a simple structure composed of a bulk parallel-plate waveguide (PPW) loaded with two printed circuit boards (PCBs), each one consisting of an array of printed dipoles. One PCB acts as a partially reflective surface (PRS), and the other grounded PCB behaves as a high impedance surface (HIS). It is shown that an independent control of the leaky-mode phase and leakage rate can be achieved by changing the lengths of the PRS and HIS dipoles, thus resulting in a flexible adjustment of the LWA pointing direction and directivity. The leaky-mode dispersion curves are obtained with a simple Transverse Equivalent Network (TEN), and they are validated with three-dimensional full-wave simulations. Experimental results on fabricated prototypes operating at 15 GHz are reported, demonstrating the versatile and independent control of the LWA performance by changing the PRS and HIS parameters.

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Antennas and Propagation, IEEE Transactions on  (Volume:59 ,  Issue: 10 )