Paquete software para sistemas de medida de antenas

The interface of antenna measurement systems is presented in this paper. This software can work with far field systems, and spherical, cylindrical or planar near field antenna measurement systems. The software is very flexible and user-friendly, in order to let the user to proceed an antenna measurement in an easy way

Experimental demonstration of contoured beam reflectarrays for satellite applications

A three-layer refletarray with patches of variable size that radiates a contoured beam at Ku-b and defined fo r Eutelsat satellite W3A at 7º East has been designed, manufactured and tested. A square reflectarray of side 1-m has been considered. For electrical design, first a phase-only synthesis technique based on the alternating projection method has been applied to obtain the phase distribution on the reflectarray surface for the specified contoured beam; and then, the patch dimensions are adjusted at each radiating element to achieve this phase distribution at several frequencies in the working band for dual linear polarisation. An appropriate mechanical design has been carried out, in order to minimise possible thermo-elastic distortions. A breadboard has been manufactured and measured in anechoic chamber. The results show a contoured beam close to the required coverage

Design and construction of a planar and cylindrical antenna measurement system at Polytechnique University of Madrid

Design And Construction of a Planar And Cylindrical Antenna Measurement System at Polytechnique University of Madri

On the fly multifrequency measurements in spherical near field systems

This paper presents a technique for reduction the acquisition time in the measurement of antennas in spherical near field systems using multifrequency on-the-fly acquisitions. When these acquisitions are performed, a shift in the pattern is performed. This shift appears in polarization when the scan is in roll axis, or in pointing direction when the scan is azimuth or elevation axis. In any case, this shift has to be corrected in order to compensate the different trigger time for each frequency point. This paper presents a technique for compensating this rotation in spherical near field system, by rotation of the radiation pattern in the scan axis through an easy calculation of the that shift

On the fly multifrequency measurements in spherical near field systems

This paper presents a technique for reduction the acquisition time in the measurement of antennas in spherical near field systems using multifrequency on-the-fly acquisitions. When these acquisitions are performed, a shift in the pattern is performed. This shift appears in polarization when the scan is in roll axis, or in pointing direction when the scan is azimuth or elevation axis. In any case, this shift has to be corrected in order to compensate the different trigger time for each frequency point. This paper presents a technique for compensating this rotation in spherical near field system, by rotation of the radiation pattern in the scan axis through an easy calculation of the that shift