1,720,981 research outputs found
Synthesis technique for scanning and/or reconfigurable beam reflector antennas with phase-only control
No full text
Synthesis technique for scanning and/or reconfigurable beam reflector antennas with phase-only control
No full text
Generalised projection technique for the synthesis of conformal arrays
No full textA new technique for the synthesis of conformal arrays in the full three dimensional and vectorial case is presented. The considered approach aims to alleviate the most fundamental difficulty of power synthesis problems, i.e., the possibility for the synthesis algorithm of being trapped by spurious solutions. The technique exploits a generalised projections algorithm, adopting a non conventional choice for the variables occurring in the synthesis problem. This choice turns out to be more favourable from the point of view of the trapping problem
Diagnostic of reflector surface distortions from amplitude only far field pattern
No full textThe diagnostic of the effective surface geometry of the reflector antenna is performed by exploiting only the amplitude of the radiated pattern. The approach is based on a convenient factorization of the aperture field and performs an optimal estimate of the reflector distortions by carefully choosing the output space and the space of the unknowns in order to improve the behaviour of the procedure with respect to the trapping problem
Optimal synthesis of reconfigurable conformal arrays with phase only control
No full textRecently, a new technique for the synthesis of (non reconfigurable) conformal arrays, based on the determination of the intersection between two suitably defined sets, has been presented in the three dimensional and fully vectorial case. In this communication, a generalization of this technique is presented in order to face the problem of the synthesis of reconfigurable conformal arrays with phase-only control. In particular the presented approach allows to find, in an optimal way, the amplitude of the excitation coefficients common to all beams and the phases of such excitations corresponding to each radiated beam
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