Design of wide-beam leaky-wave antenna arrays based on the bilinear transformation of IIR digital filters and the Z transform
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This work was supported by the Spanish National project PID2019-103982RB-C42/AEI/10.13039/501100011033.Fecha de publicación
2023-09-29Editorial
WileyCita bibliográfica
Verdú‐Monedero, R., Gómez‐Tornero, J., Morales‐Sánchez, J. (2023). Design of Wide‐Beam Leaky‐Wave Antenna Arrays Based on the Bilinear Transformation of IIR Digital Filters and the Z Transform. Advanced Theory and Simulations, 6(12). https://doi.org/10.1002/adts.202300364Revisión por pares
siPalabras clave
Z transformAntenna arrays synthesis
Fourier transform
Leaky-wave antennas
Linear time-invariant systems
Resumen
In the pioneering work, the radiation diagrams of leaky wave antenna arrays can achieve attenuation nulls and gains at specific angles by manually placing the zeros and the poles in the Z domain of the corresponding discrete linear time-invariant (LTI) system. This handcrafted design procedure does not allow radiation diagrams with wide beams since the interaction between poles involved in the wide beam and their corresponding leaky modes cannot be easily handled. To overcome this limitation, this paper describes a novel method for designing radiation diagrams of leaky-wave antenna arrays based on the theory of IIR discrete filters. The proposed method relies on the design of discrete filters with the prototypes of analog low-pass filters defined by Butterworth and Chebyshev type I polynomials, whose roots along with the bilinear transformation provide the location of the poles and the zeros of the discrete LTI system and, therefore, the parameters of the leaky-wave antenna array. Results ...
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