利索-全球专利检索

  1. 登录
  2. 注册
实用新型
CN205545152U 一种宽带中频上变频的电路 有权

一种宽带中频上变频的电路
摘要：
本实用新型涉及一种宽带中频上变频的电路，设定本振输入信号为fLO，中频输入信号为fIF，其中中频输入信号fIF功分为正交的两路中频信号，本振输入信号fLO功分为同相的两路本振信号，分别提供给两个性能相同的混频电路，产生两路上变频射频信号，所述混频电路产生的信号包括所需要的射频信号fLO±fIF、三阶杂散信号fLO±2*fIF，通过同相合路器，两路射频信号fLO±fIF合路输出，两路三阶杂散信号fLO±2*fIF，相位相反，相互抵消。在宽带中频上变频的过程中，有效抑制信号传输中的三阶杂散信号，上变频输入中频带宽可以达到1~2个倍频程，上变频输出带通滤波器带宽设置可以达到1~2个中频带宽，降低了上变频输出滤波器的带外抑制指标要求。
摘要（英）：

The utility model relates to a circuit of broadband intermediate frequency up -conversion sets for local oscillator incoming signal and be fLO, and intermediate frequency incoming signal is fIF, and wherein intermediate frequency incoming signal fIF merit is divided into two way intermediate frequency signal of quadrature, and local oscillator incoming signal fLO merit is divided into isopic two tunnel local oscillator signals, offers two mixer circuit that the performance is the same respectively, and production two is frequency conversion radiofrequency signal on the road, the signal that mixer circuit produced includes required radiofrequency signal fLO fIF, third -order on spurious signal fLO 2fIF, and through the homophase combiner, two way radiofrequency signal fLO fIF close way output, two way third -order on spurious signal fLO 2fIF, and the phase place is opposite, cancel?each other?out. At the in -process of broadband intermediate frequency up -conversion, third -order on spurious signal in the transmission of effective inhibit signal, up -conversion input intermediate frequency bandwidth can reach 1~2 octave, and up -conversion output band pass filter bandwidth sets up and to reach 1~2 intermediate frequency bandwidth, has reduced up -conversion output filter's out of band rejection index requirement.

0/0