本文介绍了一种基于混合型Radant透镜天线体制的低成本相控阵雷达天线。该新型体制的低成本相控阵天线主要包含两部分:一个方位一维相扫天线和一个俯仰Radant透镜天线,通过前后位置级联的方式将两者连起来,构成两维扫描相控阵天线。其中...本文介绍了一种基于混合型Radant透镜天线体制的低成本相控阵雷达天线。该新型体制的低成本相控阵天线主要包含两部分:一个方位一维相扫天线和一个俯仰Radant透镜天线,通过前后位置级联的方式将两者连起来,构成两维扫描相控阵天线。其中,方位一维相扫天线通过T/R组件中的移相器完成方位面的相控扫描,它所辐射的垂直极化平面波,进入俯仰面Radant透镜型平行板传输线中以后,通过Radant透镜中块移相器的移相,产生俯仰面的天线口径相位梯度,完成俯仰面的天线相控扫描,最终获得两维相控阵扫描性能。仿真结果显示基于Radant透镜天线的低成本相控阵天线可以实现±30˚扫描性能。In this paper, A low-cost phased array (LPA) antenna based on Radant lens antenna is presented. The proposed LPA mainly consists of two parts: an azimuth one-dimensional phase scanning antenna and an elevation Radant lens antenna, which are connected by the cascading way of the front and back positions to form a two-dimensional scanning phased array antenna. Among them, the azimuth one-dimensional phase scanning antenna realizes the beam scanning performance of the azimuth plane by changing the phases of the phase shifter in the T/R module. The vertically polarized plane wave radiated by it enters the Radant lens on the elevation plane, and generates the antenna aperture phase gradient on the elevation surface through the phase shift of the block phase shifter in the Radant lens, finally, completing beam scanning performance on the elevation plane. Simulation results show that the LPA antenna based on Radant lens antenna can achieve ±30˚ scanning performance.展开更多
A DC to 5GHz series MEMS switch is designed and fabricated for wireless communication applications,and thermal effect and power handling of the series switch are discussed.The switch is made on glass substrate,and gol...A DC to 5GHz series MEMS switch is designed and fabricated for wireless communication applications,and thermal effect and power handling of the series switch are discussed.The switch is made on glass substrate,and gold platinum contact is used to get a stable and little insert loss.From DC to 5GHz,0 6dB insertion loss,30dB isolation,and 30μs delay are demonstrated.Thermal effect of the switch is tested in 85℃ and -55℃ atmosphere separately.From DC to 4GHz,the insert loss of the switch increases 0 2dB in 85℃ and 0 4dB in -55℃,while the isolation holds the same value as that in room temperature.To measure the power handling capability of the switch,we applied a continuous RF power increasing from 10dBm to 35 1dBm with the step of 1 0dBm across the switch at 4GHz.The switch keeps working and shows a decrease of the insert loss for 0 1～0 6dB.The maximum continuous power handling (35 1dBm,about 3 24W) is higer than the reported value of shunt switch (about 420mW),which implies series switches have much better power handling capability.展开更多
文摘本文介绍了一种基于混合型Radant透镜天线体制的低成本相控阵雷达天线。该新型体制的低成本相控阵天线主要包含两部分:一个方位一维相扫天线和一个俯仰Radant透镜天线,通过前后位置级联的方式将两者连起来,构成两维扫描相控阵天线。其中,方位一维相扫天线通过T/R组件中的移相器完成方位面的相控扫描,它所辐射的垂直极化平面波,进入俯仰面Radant透镜型平行板传输线中以后,通过Radant透镜中块移相器的移相,产生俯仰面的天线口径相位梯度,完成俯仰面的天线相控扫描,最终获得两维相控阵扫描性能。仿真结果显示基于Radant透镜天线的低成本相控阵天线可以实现±30˚扫描性能。In this paper, A low-cost phased array (LPA) antenna based on Radant lens antenna is presented. The proposed LPA mainly consists of two parts: an azimuth one-dimensional phase scanning antenna and an elevation Radant lens antenna, which are connected by the cascading way of the front and back positions to form a two-dimensional scanning phased array antenna. Among them, the azimuth one-dimensional phase scanning antenna realizes the beam scanning performance of the azimuth plane by changing the phases of the phase shifter in the T/R module. The vertically polarized plane wave radiated by it enters the Radant lens on the elevation plane, and generates the antenna aperture phase gradient on the elevation surface through the phase shift of the block phase shifter in the Radant lens, finally, completing beam scanning performance on the elevation plane. Simulation results show that the LPA antenna based on Radant lens antenna can achieve ±30˚ scanning performance.
文摘A DC to 5GHz series MEMS switch is designed and fabricated for wireless communication applications,and thermal effect and power handling of the series switch are discussed.The switch is made on glass substrate,and gold platinum contact is used to get a stable and little insert loss.From DC to 5GHz,0 6dB insertion loss,30dB isolation,and 30μs delay are demonstrated.Thermal effect of the switch is tested in 85℃ and -55℃ atmosphere separately.From DC to 4GHz,the insert loss of the switch increases 0 2dB in 85℃ and 0 4dB in -55℃,while the isolation holds the same value as that in room temperature.To measure the power handling capability of the switch,we applied a continuous RF power increasing from 10dBm to 35 1dBm with the step of 1 0dBm across the switch at 4GHz.The switch keeps working and shows a decrease of the insert loss for 0 1～0 6dB.The maximum continuous power handling (35 1dBm,about 3 24W) is higer than the reported value of shunt switch (about 420mW),which implies series switches have much better power handling capability.
