A review of some recent results concerning radiative characteristics of phased arrays of planar leaky-wave antennas is presented, with particular reference to end-of-scanning effects and to the occurrence of grating lobes. On the basis of a full-wave numerical simulation of infinite linear arrays of microstrip lines, performed via a spectral-domain moment-method approach in the unit cell, the phase and leakage constants of the involved modes have been determined as a function of the physical parameters of the structure and of the phase shift between elements. A transition region between a leaky-wave range and a guided-wave range is reported for the operating mode in correspondence to array radiation at endfire. Moreover, the excitation of a new, additional leaky mode is shown to be responsible for the presence of grating lobes in widely-spaced arrays. Numerical simulations performed on realistic array structures are presented to validate the proposed analysis.

Baccarelli, P., Galli, A. (2004). Leakage phenomena in planar arrays. In Electromagnetics in a complex world: challenges and perspectives (pp. 197-206). Berlin-Heidelberg : Springer.

Leakage phenomena in planar arrays

BACCARELLI, PAOLO;GALLI, ALESSANDRO
2004-01-01

Abstract

A review of some recent results concerning radiative characteristics of phased arrays of planar leaky-wave antennas is presented, with particular reference to end-of-scanning effects and to the occurrence of grating lobes. On the basis of a full-wave numerical simulation of infinite linear arrays of microstrip lines, performed via a spectral-domain moment-method approach in the unit cell, the phase and leakage constants of the involved modes have been determined as a function of the physical parameters of the structure and of the phase shift between elements. A transition region between a leaky-wave range and a guided-wave range is reported for the operating mode in correspondence to array radiation at endfire. Moreover, the excitation of a new, additional leaky mode is shown to be responsible for the presence of grating lobes in widely-spaced arrays. Numerical simulations performed on realistic array structures are presented to validate the proposed analysis.
2004
3540202358
Baccarelli, P., Galli, A. (2004). Leakage phenomena in planar arrays. In Electromagnetics in a complex world: challenges and perspectives (pp. 197-206). Berlin-Heidelberg : Springer.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/327848
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