Based on a dual-polarization high-frequency wave radar system, an adaptive system using horizontal antennas for the suppression of the Es layer interference （ELI） is deseribech The data received from the horizontal ...Based on a dual-polarization high-frequency wave radar system, an adaptive system using horizontal antennas for the suppression of the Es layer interference （ELI） is deseribech The data received from the horizontal antennas were correlated with the data received from the Vertically Polarized Antennas （VPAs） to estimate and cancel the interference adaptively in the VPAs. Suppressing the interference after each coherent integration time interval, about 25 dB signal-to-interference ratio is expected with the experimentally derived data.展开更多
采用三阶信噪比(signal to interference ratio,SIR)干扰谐振器作为基本谐振单元,通过调整阻抗比控制主频和第一杂散频率的位置,设计了一种新型高阻带抑制双通带滤波器.滤波器第一通带由主谐振频率产生,第二通带由第一杂散频率产生.运...采用三阶信噪比(signal to interference ratio,SIR)干扰谐振器作为基本谐振单元,通过调整阻抗比控制主频和第一杂散频率的位置,设计了一种新型高阻带抑制双通带滤波器.滤波器第一通带由主谐振频率产生,第二通带由第一杂散频率产生.运用三角耦合结构作为该滤波器的拓扑结构,使得整体滤波器呈现出带外传输零点和阻带的高抑制度.使用交指型耦合结构实现输入/输出端的强耦合,得到较高的外部品质因数.该滤波器的两个通带中心频率分别为1.57 GHz(GPS)和2.5 GHz(4G),3 d B带宽分别为4.0%和2.4%.结果表明,测量结果和仿真结果基本吻合.展开更多
文摘Based on a dual-polarization high-frequency wave radar system, an adaptive system using horizontal antennas for the suppression of the Es layer interference （ELI） is deseribech The data received from the horizontal antennas were correlated with the data received from the Vertically Polarized Antennas （VPAs） to estimate and cancel the interference adaptively in the VPAs. Suppressing the interference after each coherent integration time interval, about 25 dB signal-to-interference ratio is expected with the experimentally derived data.
文摘采用三阶信噪比(signal to interference ratio,SIR)干扰谐振器作为基本谐振单元,通过调整阻抗比控制主频和第一杂散频率的位置,设计了一种新型高阻带抑制双通带滤波器.滤波器第一通带由主谐振频率产生,第二通带由第一杂散频率产生.运用三角耦合结构作为该滤波器的拓扑结构,使得整体滤波器呈现出带外传输零点和阻带的高抑制度.使用交指型耦合结构实现输入/输出端的强耦合,得到较高的外部品质因数.该滤波器的两个通带中心频率分别为1.57 GHz(GPS)和2.5 GHz(4G),3 d B带宽分别为4.0%和2.4%.结果表明,测量结果和仿真结果基本吻合.
