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单边带调制器     
相关语句
  single sideband modulator
     Design and Implementation of an Improved Single Sideband Modulator
     增强型单边带调制器的设计与实现
短句来源
  sideband modulator
     Design and Implementation of an Improved Single Sideband Modulator
     增强型单边带调制器的设计与实现
短句来源
  single-band modulator
     A Full-pass Network for Single-band Modulator
     全通网络在单边带调制器中的应用
短句来源
     The single-band modulator using phase-shift method is applied widely in singleband communication,but if single-band signal is produced in modulator,it is demanded that phase -shift network of modulation signal and carrier is phase-shifted 90~0 accurately within the whole band,specially when the band is wider,common phase-shift network is too difficult to do.
     相移法单边带调制器在单边带通信中应用很广,但在调制器中要产生单边带信号,要求调制信号和载波的移相网络在整个频带范围内准确移相90~0,特别是在频带范围较宽时,普通移相网络难以做到这一点。
短句来源
  “单边带调制器”译为未确定词的双语例句
     A 6GHz Microwave Single-Sideband Modulator
     6GHz微波单边带调制器
短句来源
     In this paper,a new kind of microwave single-sidcband(SSB)modulator operating at 6GHz is presented.
     本文介绍一新型的工作频率为6GHz的微波单边带调制器原理电路和分析.此调制器在微波电路上采用一对环行桥,"π/2"移相器、功分器和加法器;
短句来源

 

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      sideband modulator
    The signal at 1.3 GHz is then up-converted to 94 GHz with a single-sideband modulator.
          
      band modulator
    Proton decoupling was accomplished with a broad band modulator and amplifier of Varian design.
          
    The C-band modulator is well designed to be compact, using an inverter power supply instead of the original large charging system.
          


    In this paper,a new kind of microwave single-sidcband(SSB)modulator operating at 6GHz is presented.By using a pair of ring bridge,phase shifter,adder and power divider in microwave circuit and awideband π/2 phase shifter in low frequency circuit, the single sideband signal can be obtained directlyin microwave frequency. Even in the case of outside control, the output sideband can still be changed automatically. In ideal case, the frequency of output single sidcband signal can be almost the same as thecarrier...

    In this paper,a new kind of microwave single-sidcband(SSB)modulator operating at 6GHz is presented.By using a pair of ring bridge,phase shifter,adder and power divider in microwave circuit and awideband π/2 phase shifter in low frequency circuit, the single sideband signal can be obtained directlyin microwave frequency. Even in the case of outside control, the output sideband can still be changed automatically. In ideal case, the frequency of output single sidcband signal can be almost the same as thecarrier frequency, and the modulation wideband can be very wide. The authors' analysis shows that thiscircuit can suppress most of the unwanted combined frequency in the output, and the frequeDCy speCtrumsof the output arc very pure. The ratios of the useful single sideband signal to the supressed carrier and tothe useless single sideband signal are both very high. The rcnection coefficient of the input is closely related to the degree of matching among the modulation active devices and circuit. The isolation ratio of theinput to the output depends mainly on the working state of the devices.When microstrip technology isused, the circuit can stand a carrier power as high as 22dBm,in a certain frequeDcy within the range ofmodulation signal frequency I-500KHz, the ratios of useful signal sidebaDd to the suppressed carrier andto the useless single sideband signal in output exceed 20dBm and 30db respectively.Experimental resultsare in good agreement with circuit analysis.

    本文介绍一新型的工作频率为6GHz的微波单边带调制器原理电路和分析.此调制器在微波电路上采用一对环行桥,"π/2"移相器、功分器和加法器;在低频电路中采用一定带"π/2"移相器等组成.电路的特点是单边带信号直接在微波频率上产生;在外界控制下,它输出边带信号可以自行转换;输出边带信号在理想情况下可以无限靠近载频,并有很宽的调制信号带宽.经电路分析,此调制器输出信号中,绝大部分组合频率分量被抑制掉、输出频谱干净;有较高的对无用边带和漏载的抑制比;它的输入端口的反射系数同调制器的有源器件和电路匹配状态关系密切;输入端到输出端的隔离度同电路,有源器件工作状态参数一致性密切相关.经实验研究,电路承受载频功率高达22dBm。;在调制信号频率为1~150KHz范围内任一点频上,输出有用边带对漏载、有用边带对无用边带信号抑制比分别超过20dB和30dB;其它组合频率分量、除二次组合频率分量外,均低于有用边带信号30dB以上.测试结果表明同分析相符.

    The single-band modulator using phase-shift method is applied widely in singleband communication,but if single-band signal is produced in modulator,it is demanded that phase -shift network of modulation signal and carrier is phase-shifted 90~0 accurately within the whole band,specially when the band is wider,common phase-shift network is too difficult to do. In this paper,it is introduced that a full-pass network made up of wide-band transconductance amplifier is to accomplish higher accurate phase-shift.

    相移法单边带调制器在单边带通信中应用很广,但在调制器中要产生单边带信号,要求调制信号和载波的移相网络在整个频带范围内准确移相90~0,特别是在频带范围较宽时,普通移相网络难以做到这一点。本文介绍一种用宽带跨导放大器组成的全通网络来完成准确度较高的移相。

    An improved single sideband modulator is introduced in this paper. Conventional single sideband modulator can achieve 25 dB or so undesired image sideband rejection. the improved single sideband modulator uses the principle of the I/Q quadrature network, combines two conventional single sideband modulators, and obtains a single sideband modulator achieving 35 dB or so undesired image sideband rejection.

    介绍了一种增强型单边带调制器 ,普通单边带调制器可使无用镜像边带抑制 2 5dB左右 ,而增强型单边带调制器进一步应用了I/Q正交网络原理 ,将两只普通单边带调制器组合应用 ,使无用镜像边带抑制度提高到约 3 5dB。

     
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