Desarrollo, análisis y diseño de antenas tipo reflectarray

Abstract

THIS PAPER SHOWS THE MOST IMPORTANT FEATURES OF A BARELY KNOWN AND RELATIVELY NEW TECHNOLOGY: MICROSTRIP REFLECTARRAY ANTENNAS, WHICH ARE CHARACTERIZED BY A MICROSTRIP ARRAY PRINTED ON A FLAT STRUCTURE ILLUMINATED BY A FEED HORN. THE FIRST PART, IS WRIT TEN AS AN INTRODUCTION FOR THE UNDER GRADUATE AND GRADUATE TELECOMMUNICATIONS STUDENTS AND AS A REVIEW FOR THE ANTENNA SPECIALISTS. ADVANTAGES OF THESE ANTENNAS ARE DISCUSSED AS WELL AS THEIR LIMITATIONS, MAINLY BAND WIDTH. IN THE SECOND PART, A METHOD OF ANALYSIS AND DESIGN FOR MULTILAYER PRINTED REFLECTARRAYS IS PRESENTED. THE PHASE OF THE REFLECTION CO EFFICIENT AT EACH ARRAY ELEMENT (DE FINED AS A PERIODIC CELL) IS COMPUTED BY THE MOMENTS METHOD IN THE SPECTRAL DO MAIN AND ASSUMING LOCAL PERIODICITY. TWO PHASE-SHIFTER EXAMPLES ARE SHOWN: AN APERTURE COUPLED UNIT CELL AND A MULTILAYER CELL WITH VARIABLE-SIZE RECTANGULAR PATCHES. A REFLECTARRAY WITH THIS LAST UNIT CELL IS USED FOR A PENCIL BEAM APPLICATION. FINALLY, A PATTERN SYNTHESIS TECHNIQUE TO OBTAIN CONTOURED BEAMS IS DE TAILED, INCLUDING TWO EXAMPLES FOR SPACE (DBS) AND TERRESTRIAL (LMDS) APPLICATIONS.