| 1. | Variable frequency local oscillator
变频本振器 |
| 2. | Lo - local oscillator
本机振荡器 |
| 3. | Based on the introduction it explores into the designing of the broad band filter and the super miniature of local oscillator source
在此基础上提出了本文课题的重要意义，主要对收发信机中宽带滤波器进行设计和探讨、本振源超小型化。 |
| 4. | Select installation and then antenna setting , and set respectively the local oscillator frequencies of the high - frequency tuner of 146 , 138ku , 138c band and so on
选择安装里的天线设定，分别设置146 、 138ku及138c波段等等的高频头本振频率。 |
| 5. | It is shown that the excessive local oscillator drive deteriorates the conversion gain of the mixer at high frequencies , a trend not shown in the low frequency approximation
我们征明了在高频下，过大的本振将使得混频器的转换增益减小。这一趋势无法由低频近似模型给出。 |
| 6. | Unlike the monostatic sar , two independent local oscillators are used for up / down conversion in bistatic case , so low frequency components of phase noise cannot be cancelled
双基地sar用两个独立的本振分别实现上变频和下变频,相噪低频分量不能相互抵消,形成与单基地sar不同的低频相噪。 |
| 7. | Third , an active mixer which needs only single - end local oscillator ( lo ) input is presented , which simplifies the rf block design and reduces the impacts of the phase noise of lo
接着本文提出了一个新型的、只需要单端本振输入的有源混频器,简化了整体电路设计,并降低了本振相噪带来的影响。 |
| 8. | Single frequency source is usually used as local oscillator in communication system and radar system , also as a reference clock in digital circuits , so it is a extensive - applied technique
固定频率源可以在在通讯系统和雷达系统中作为本机振荡器,也可以作为数字电路的基准时钟信号,因此得到了广泛的应用。 |
| 9. | The phase detecting error caused by local oscillator frequency drift and non - synchronization of measurement signal and gate signal is eliminated and the measurement speed is improved at the same time
该方法可以有效的消除因本振信号频率漂移及闸门信号与被测信号的非同步引起的测相误差,同时提高了测量速度。 |
| 10. | So the low price , small bulk and high performance of front - end rf become more and more important . in this dissertation , a ka band multiplier chain is developed , which can be used for local oscillator
低价的、小型的、高性能的射频收发前端的开发显得越来越重要，本论文所研究的课题是ka波段倍频链，要求把2ghz的信号倍增至36ghz 。 |
