ID 原文 译文
15725 为了实现锁相环的快速锁定和稳定的带宽调节,提出了一种采用快速锁定辅助鉴别鉴相器锁相环的频率合成器。 To achieve fast phase－locked loop and stable bandwidth regulation，a frequency synthesizer was implemented withphase－locked loop for a fast－locked discriminator－aided phase detector．
15726 首先,通过对传统锁相环中的鉴相器的线性与非线性特性分析,设计了一种新的非线性特性鉴相器。 Firstly，a new nonlinear phase detector was designedby analyzing the linear and nonlinear characteristics of the phase detector in traditional phase－locked loop．
15727 然后,在此基础上实现了构成PLL频率合成器的辅助鉴别鉴相器,并给出了PLL频率合成器的各模块电路实现。 On this basis，adiscriminator－aided phase detector which constitutes PLL frequency synthesizer was then implemented，and the realization ofeach module circuit of PLL frequency synthesizer was given．
15728 实验结果表明,提出的PLL频率合成器不但能够减少PLL的捕捉时间,提高开关速度,而且能有效地保持噪声带宽。 The experimental results show that the proposed PLL frequencysynthesizer can not only reduce the PLL pull－in time and improve the switching speed，but also maintain the noise bandwidtheffectively．
15729 在100 kHz偏移时的输出相位噪声为-91 dBc/Hz,峰-峰值抖动为110 ps,实测芯片尺寸为30 mm×2 mm,功耗为100 mW。 The output phase noise is －91 dBc /Hz，and the peak－peak jitter is 110 ps at 100 kHz offset． The measured chipsize is 30 mmo×2 mm，and the power consumption is 100 mW．
15730 为了解决大功率短波广播发射天线的不平衡馈电和阻抗不匹配问题,提出了一种短波大功率宽带并联谐振腔巴伦。 In order to solve the problems of unbalanced feeding and mismatched impedance of high － power short －wavebroadcast transmitting antenna，a short－wave high power wideband balun with parallel resonant cavity was proposed．
15731 该巴伦采用谐振腔与同轴传输线的并联结构,同时实现了不平衡-平衡转换和阻抗变换。 Basedon the parallel structure of the resonant cavity and coaxial transmission line，the balun achieves the unbalanced － balancedconversion and the transformation of the impedance．
15732 通过理论分析和全波电磁仿真的相互验证,完成了巴伦的设计和优化。 Through mutual verification of theoretical analysis and full － waveelectromagnetic simulation，the balun was designed and optimized．
15733 仿真结果表明:工作频率范围是5～26.1 MHz(相对带宽为135.7%),阻抗变换比为1∶4,电压驻波比保持在1.5以下,插入损耗小于0.2 dB,相位不平衡小于2°,幅值不平衡小于0.5 dB,并且可承受500 kW以上的输入功率。 The simulation results show that the operating frequencyrange is 5～ 26. 1 MHz ( the relative bandwidth is 135. 7%) ，the impedance transformation ratio is 1 ∶ 4，the voltage standingwave ratio is kept below 1. 5，the insertion loss is less than 0. 2 dB，the phase imbalance is less than 2°，the amplitude imbalance is less than 0. 5 dB，and it can withstand the input power more than 500 kW．
15734 该巴伦具有工作频带宽、传输效率高、辐射损耗低、平衡性能良好和承受功率大的特点,能够应用于大功率短波广播发射天馈线系统。 With the advantages of wideoperating frequency range，high efficiency of transmission，low radiation loss，great performance of balance and the high－power compatibility，this balun can be applied to high power short－wave broadcast transmitting antenna feeder sy