Dielectric resonator reflectarray with two DRA sizes and varying slot loading

摘要: High gain antennas are desired in various applications, such as radar, radio astronomy, satellite communications, and remote sensing. The conventional parabolic reflectors generally bulky size large mass due to the curved reflecting surfaces. Recently, microstrip reflectarrays found be very attractive aperture because of their planar structure simple feeding [1]. Usually, required phase value compensate for different paths wave from feed horn each array element is only achieved at center frequency within a range 360°. Each can adjusted produce over control main beam orientation. For linear polarization, progressive phase-shift distribution using patches with variable length stubs [2]. same obtained [3] by sizes. dynamic shift single-layer reflectarray less than 360°, complete compensation central frequency, which restrict application large-aperture and/or wideband reflectarray. Most have employed multi-layer achieve high performance [4]. realized rectangular crossed dielectric resonator polarization ka-band [5] circular X-band [6] investigated. elements backed thin substrate conducting ground plane.