IEEE Access · 2021 · 49 citations · 20 references
EngineeringElectrical EngineeringAntennasMicroelectronicsMicrowave EngineeringAntenna ArraysAntenna PolarizationMicrostrip AntennasMicrostrip CircuitsMicrowave Transmission LinesReconfigurable AntennasFeed Horn DesignGain BandwidthMicrostrip Phase ShiftersMicrowave Phase Shifter DesignPhase ShiftersPolarization RotationReconfigurable Antenna ArraysWideband Array Design
In this paper, a 1-bit wideband electronically reconfigurable reflectarray (RRA) in Ku-band is proposed. In order to achieve the wideband and reconfigurable characteristics, the stacked microstrip structure and a 1-bit “microstrip line-slot line-microstrip line” phase shifter (MSMPS) were introduced in this design. A novel “receiving-phase shift-transmitting” unit cell was gotten by connecting two stacked microstrip structures using MSMPS. Due to the receiving and transmitting parts are perpendicular to each other, the polarization rotation characteristic was demonstrated. To avoid the blockage of the feed horn, it was placed above the reflecting surface array with an offset angle of 25° to the normal direction. A <inline-formula> <tex-math notation="LaTeX">$16\times16$ </tex-math></inline-formula> obliquely-fed RRA was designed and fabricated. The measured 1-dB gain bandwidth of the RRA is 15.4%. The measured results show that the fabricated prototype can achieve beam scanning from −20° to 50° in the elevation plane, and ±50° beam scanning in the azimuth plane.
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