The paper presents an innovative method for the diagnosis of reflector antennas for radio astronomical applications in terms of feed misalignment. The method optimizes the number and the location of the far field sampling points exploited to retrieve the antenna status in order to reduce the time required for the measurement. The goal is achieved by introducing a relevant linear operator connecting the unknowns describing the status of the antenna and its far field pattern thanks to a proper representation of the unknowns, and by optimizing its singular values behavior. A numerical result is provided in the simple case of a phase aperture affected by tilt only, even if the approach is suited for higher order aberrations too. It show that the approach is capable to significantly reduce the number of required samples compared to a standard grid defined according to the Nyquist criterion without affecting the performance of the diagnosis.
Optimized diagnosis of reflectors misalignements in radioastronomical applications / Capozzoli, Amedeo; Curcio, Claudio; D'Elia, Giuseppe; Liseno, Angelo; Savarese, Salvatore; Schipani, Pietro. - (2015), pp. 1-5. (Intervento presentato al convegno 9th European Conference on Antennas and Propagation, EuCAP 2015 tenutosi a Lisbon, Portugal nel Apr. 13-17, 2015).
Optimized diagnosis of reflectors misalignements in radioastronomical applications
CAPOZZOLI, AMEDEO;CURCIO, CLAUDIO;D'ELIA, GIUSEPPE;LISENO, ANGELO;SAVARESE, SALVATORE;
2015
Abstract
The paper presents an innovative method for the diagnosis of reflector antennas for radio astronomical applications in terms of feed misalignment. The method optimizes the number and the location of the far field sampling points exploited to retrieve the antenna status in order to reduce the time required for the measurement. The goal is achieved by introducing a relevant linear operator connecting the unknowns describing the status of the antenna and its far field pattern thanks to a proper representation of the unknowns, and by optimizing its singular values behavior. A numerical result is provided in the simple case of a phase aperture affected by tilt only, even if the approach is suited for higher order aberrations too. It show that the approach is capable to significantly reduce the number of required samples compared to a standard grid defined according to the Nyquist criterion without affecting the performance of the diagnosis.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
