CN106209095A - A kind of power combing Terahertz fixed ampllitude method adjusted based on phase place - Google Patents
A kind of power combing Terahertz fixed ampllitude method adjusted based on phase place Download PDFInfo
- Publication number
- CN106209095A CN106209095A CN201610585927.5A CN201610585927A CN106209095A CN 106209095 A CN106209095 A CN 106209095A CN 201610585927 A CN201610585927 A CN 201610585927A CN 106209095 A CN106209095 A CN 106209095A
- Authority
- CN
- China
- Prior art keywords
- signal
- terahertz
- power
- phase
- amplitude
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 33
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 239000000284 extract Substances 0.000 claims description 2
- 230000005540 biological transmission Effects 0.000 claims 1
- 230000005611 electricity Effects 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 13
- 238000003786 synthesis reaction Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 11
- 230000006641 stabilisation Effects 0.000 abstract description 9
- 238000011105 stabilization Methods 0.000 abstract description 9
- 230000006978 adaptation Effects 0.000 abstract description 5
- 238000012937 correction Methods 0.000 abstract description 5
- 230000008859 change Effects 0.000 description 5
- 238000004458 analytical method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004044 response Effects 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
- H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
- H03L7/22—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using more than one loop
Landscapes
- Optical Communication System (AREA)
Abstract
一种基于相位调整的功率合成太赫兹稳幅方法，采用传统的强度探测器作为幅度检测，并将检测电平的低频包络检波信号作为反馈量，驱动功率合成各分支间的相位适配度调整，实现最终太赫兹输出幅度的调整功能。在自反馈和修正过程中，太赫兹信号的输出幅度会被反馈信号钳制，从而使得输出的太赫兹信号的电平幅度趋于平稳，以达到稳幅的目的。
A terahertz amplitude stabilization method for power synthesis based on phase adjustment. The traditional intensity detector is used as the amplitude detection, and the low-frequency envelope detection signal of the detection level is used as the feedback value to drive the phase adaptation degree between the branches of the power synthesis. Adjust to realize the adjustment function of the final terahertz output amplitude. In the process of self-feedback and correction, the output amplitude of the terahertz signal will be clamped by the feedback signal, so that the level and amplitude of the output terahertz signal tend to be stable, so as to achieve the purpose of amplitude stabilization.
Description
技术领域technical field
本发明属于信号处理领域，涉及一种信号幅度的调整方法，特别适用于对太赫兹稳幅特性有要求的太赫兹源。The invention belongs to the field of signal processing, and relates to a signal amplitude adjustment method, which is especially suitable for terahertz sources that require terahertz amplitude stabilization characteristics.
背景技术Background technique
太赫兹技术是当前学术研究的热点，能够被应用于物体成像、环境监测、医疗诊断、射电天文、安全检查、反恐探测、卫星通信和雷达探测等与国民经济和社会发展密切相关的领域，其中太赫兹源是不可或缺的部件之一。尽管实际应用中对太赫兹源的输出功率有严格要求，然而太赫兹源输出功率的实际值目前仍然无法准确获知，即便是国外购进的功率计，其测量准确度长时间使用后也无法保证，而国内对此类高频设备的计量手段欠缺。为此需要对太赫兹的输出功率进行溯源，以便获得功率计量的手段。Terahertz technology is a hotspot in current academic research, and can be applied to fields closely related to national economic and social development, such as object imaging, environmental monitoring, medical diagnosis, radio astronomy, security inspection, anti-terrorism detection, satellite communication, and radar detection. Terahertz source is one of the indispensable components. Although there are strict requirements on the output power of the terahertz source in practical applications, the actual value of the output power of the terahertz source is still not known accurately. Even if the power meter purchased from abroad, its measurement accuracy cannot be guaranteed after a long period of use , while domestic measurement methods for such high-frequency equipment are lacking. To this end, it is necessary to trace the output power of terahertz in order to obtain the means of power measurement.
在溯源过程中，需要一台幅度能够长时间保持稳定的太赫兹信号源。现阶段，获得太赫兹稳幅信号非常困难，其一是由于太赫兹信号的产生无论光学手段还是电学手段均利用非线性过程产生，控制其偏置参数不能保证信号产生处于较好的稳定态，且控制函数的单调性不强；其二是采用衰减器进行动态调节，但现阶段大部分太赫兹衰减器为手动调整，已报道的少量电调衰减器的响应速度均在亚秒量级，无法满足快速幅度调整的需求。In the process of tracing the source, a terahertz signal source that can maintain stable amplitude for a long time is needed. At this stage, it is very difficult to obtain a terahertz signal with stable amplitude. One is that the terahertz signal is generated by a nonlinear process regardless of the optical or electrical means. Controlling its bias parameters cannot ensure that the signal is generated in a better stable state. And the monotonicity of the control function is not strong; the second is to use the attenuator for dynamic adjustment, but most of the terahertz attenuators are manually adjusted at this stage, and the response speed of a small number of electronically adjustable attenuators that have been reported are all on the sub-second level. Can not meet the needs of rapid amplitude adjustment.
发明内容Contents of the invention
本发明解决的技术问题是：克服现有技术的不足，提供了一种基于相位调整的功率合成太赫兹稳幅方法，通过控制功率合成过程的相位失配度来达到输出功率幅度快速平衡的目的，具有响应快，易于实现，可靠性高的特点。The technical problem solved by the present invention is: to overcome the deficiencies of the prior art, to provide a phase adjustment-based power synthesis terahertz amplitude stabilization method, and to achieve the purpose of quickly balancing the output power amplitude by controlling the phase mismatch degree in the power synthesis process , has the characteristics of fast response, easy implementation and high reliability.
本发明的技术解决方案是：一种基于相位调整的功率合成太赫兹稳幅方法，包括如下步骤：The technical solution of the present invention is: a method for power synthesis terahertz amplitude stabilization based on phase adjustment, comprising the following steps:
(1)利用信号源产生基频信号，并对所述基频信号进行功率分配，形成两路基频分支信号；(1) using a signal source to generate a baseband signal, and performing power distribution on the baseband signal to form two baseband branch signals;
(2)将两路基频分支信号馈入锁相环中，每一路基频分支信号单独对应一个锁相环；利用倍频信号与基频信号间相位线性传递的特性，通过其中一路基频分支信号对应的锁相环调整该路基频分支信号的相位延迟，使得两路基频分支信号的相位差为90°/N，其中N为倍频次数，N为正整数；(2) Feed two fundamental frequency branch signals into the phase-locked loop, and each fundamental frequency branch signal corresponds to a phase-locked loop separately; using the characteristic of phase linear transfer between the multiplier signal and the fundamental frequency signal, through one of the fundamental frequency branch The phase-locked loop corresponding to the signal adjusts the phase delay of the base frequency branch signal so that the phase difference of the two base frequency branch signals is 90°/N, where N is the number of frequency multiplications, and N is a positive integer;
(3)对经过步骤(2)处理的两路基频分支信号分别进行N倍频，并对各自倍频后的两路基频分支信号进行合成，得到功率合成后的太赫兹信号；(3) performing N multiplication on the two base frequency branch signals processed in step (2), and synthesizing the two base frequency branch signals after respective frequency multiplication to obtain a terahertz signal after power synthesis;
(4)利用定向耦合器获取能够驱动检波器的最小功率的太赫兹信号作为反馈检测信号，对所述反馈检测信号进行包络检波，提取出幅度包络特征作为太赫兹信号输出功率电平特征信号；(4) Use the directional coupler to obtain the minimum power terahertz signal that can drive the detector as the feedback detection signal, perform envelope detection on the feedback detection signal, and extract the amplitude envelope feature as the output power level feature of the terahertz signal Signal;
(5)利用步骤(4)得到的电平特征信号幅度量Pout作为参量，采用公式计算，得到对锁相环的修正参数Δφ，并写入步骤(2)中进行相位延迟操作的锁相环进行相位反馈调整，保持功率合成后的太赫兹信号的动态平衡，均值功率为一定值，A1和A2分别为两路基频分支信号的幅度。(5) Utilize the level characteristic signal magnitude P out that step (4) obtains as parameter, adopt formula Calculate and obtain the correction parameter Δφ of the phase-locked loop, and write it into the phase-locked loop for phase delay operation in step (2) to adjust the phase feedback, keep the dynamic balance of the terahertz signal after power synthesis, and the average power is a certain value , A 1 and A 2 are the amplitudes of the two fundamental frequency branch signals respectively.
优选的，所述步骤(1)中对基频信号进行功率分配的方式为等幅分配。Preferably, in the step (1), the method of power allocation to the baseband signal is equal-amplitude allocation.
优选的，所述反馈检测信号功率为功率合成后的太赫兹信号功率的1‰。Preferably, the power of the feedback detection signal is 1‰ of the power of the terahertz signal after power synthesis.
本发明与现有技术相比的优点在于：The advantage of the present invention compared with prior art is:
1、现有技术无法实现太赫兹信号输出功率的动态稳幅，因此输出信号往往会随环境温度变化、直流偏置信号的抖动以及太赫兹倍频器件本身的噪声而随机抖动，甚至成大幅度曲线的非回归变化；而本发明采用动态相位补偿式调节的方式，实现了功率维度的调整，使得太赫兹输出信号能够实时保持恒幅度输出；1. The existing technology cannot realize the dynamic stabilization of the output power of the terahertz signal, so the output signal often jitters randomly or even with a large amplitude due to the change of the ambient temperature, the jitter of the DC bias signal and the noise of the terahertz frequency multiplier itself. The non-regression change of the curve; and the present invention adopts a dynamic phase compensation adjustment method to realize the adjustment of the power dimension, so that the terahertz output signal can maintain a constant amplitude output in real time;
2、传统方法采用直接检波后作为输入，将倍频器的附加噪声叠加在反馈的信号中，使得相位调整电路无法正常工作。而本发明采用包络检波的方式，极大地提升了反馈信号对输出功率漂移反映的真实度，可靠性大大提高；2. The traditional method uses direct detection as the input, and superimposes the additional noise of the frequency multiplier on the feedback signal, making the phase adjustment circuit unable to work normally. However, the present invention adopts the method of envelope detection, which greatly improves the authenticity of the feedback signal to the output power drift, and the reliability is greatly improved;
3、目前尚缺乏对太赫兹信号的快速调整功能；而本发明采用了中频移相的方法，可以实现对太赫兹信号相位的快速调整。3. At present, there is still a lack of rapid adjustment function for terahertz signals; however, the present invention adopts the method of intermediate frequency phase shifting, which can realize rapid adjustment of the phase of terahertz signals.
附图说明Description of drawings
图1为本发明方法的原理图；Fig. 1 is the schematic diagram of the inventive method;
图2为本发明中两路信号合成效率与相位夹角之间关系的曲线图；Fig. 2 is the graph of the relationship between two-way signal synthesis efficiency and phase angle among the present invention;
图3为本发明中未经过相位适配度补偿的输出信号电平曲线(黑色线条)和经过相位适配度调整补偿的输出信号电平曲线(沿横轴的亮色窄带)。Fig. 3 is the output signal level curve (black line) without phase adaptation degree compensation and the output signal level curve (bright color narrow band along the horizontal axis) after phase adaptation degree adjustment compensation in the present invention.
具体实施方式detailed description
本发明从技术层面可分为两部分：稳幅功率输出的相位调整和采用包络检波反馈网络。其中前者主要阐述了通过快速相位控制实现信号输出电平的动态稳定过程和理论依据；后者阐述了信号的反馈不是一般的反馈方式，得进行信号的包络特征提取，用于消除相位噪声带来的干扰。The present invention can be divided into two parts from the technical level: the phase adjustment of the stable amplitude power output and the adoption of the envelope detection feedback network. Among them, the former mainly expounds the dynamic stabilization process and theoretical basis of the signal output level through fast phase control; the latter expounds that the feedback of the signal is not a general feedback method, and the envelope feature extraction of the signal must be carried out to eliminate the phase noise band. to interfere.
(一)稳幅功率输出的相位调整理论分析(1) Theoretical analysis of phase adjustment for stable amplitude power output
基于相位调整的功率合成太赫兹稳幅方法，其实现过程主要为以下两个关键过程：通过调整两路信号相位差为90°(其它非0相位差的状态也可以，但是90°相位差的情况最佳，其调整范围大)，使得合成效率为50％；通过定向耦合装置采集能满足最小探测要求的小部分功率电平，积分后反馈给相位调整电路作为参考信号，具体实现方案如图1所示。The realization process of the power synthesis terahertz amplitude stabilization method based on phase adjustment is mainly the following two key processes: by adjusting the phase difference of the two signals to 90° (other non-zero phase difference states are also possible, but the 90° phase difference The situation is the best, and its adjustment range is large), so that the synthesis efficiency is 50%; through the directional coupling device, a small part of the power level that can meet the minimum detection requirements is collected, and after integration, it is fed back to the phase adjustment circuit as a reference signal. The specific implementation scheme is shown in the figure 1.
采用相位失配度调整合路功率输出的理论及仿真结果如下：The theoretical and simulation results of adjusting the combined power output by using the phase mismatch degree are as follows:
设两路信号分别为S1＝A1[cos(ωt)+jsin(ωt)]，S2＝A2[cos(ωt)+jsin(ωt)]，其中，S1和S2为假设的两路信号，A1和A2分别为假设的两路信号的幅度，ω为信号的角频率。若两路信号的相位夹角为φ，则该两路信号的合成功率表达式为：Let the two signals be S 1 ＝A 1 [cos(ωt)+jsin(ωt)], S 2 ＝A 2 [cos(ωt)+jsin(ωt)], where S 1 and S 2 are hypothetical The two signals, A 1 and A 2 are the amplitudes of the hypothetical two signals respectively, and ω is the angular frequency of the signal. If the phase angle between the two signals is φ, then the combined power expression of the two signals is:
Psum＝|S1+S2|2＝A1 2+A2 2+2A1A2cosφ (1)P sum ＝|S 1 +S 2 | 2 ＝A 1 2 +A 2 2 +2A 1 A 2 cosφ (1)
而当两路信号的相位差为0时具有最大合成功率：And when the phase difference of the two signals is 0, it has the maximum combined power:
Pmax_sum＝|S1+S2|2＝A1 2+A2 2+2A1A2 (2)P max_sum ＝|S 1 +S 2 | 2 ＝A 1 2 +A 2 2 +2A 1 A 2 (2)
另，总有一个实数a可以使得A1＝aA2(a∈R)成立，则合成效率可以表示为：In addition, there is always a real number a that can make A 1 =aA 2 (a∈R) hold, then the synthesis efficiency can be expressed as:
通过调节两路信号的幅度近似相等，使得a≈1，则(3)式可化简为(4)式，By adjusting the amplitudes of the two signals to be approximately equal so that a≈1, formula (3) can be simplified to formula (4),
其中η为功率合成效率，φ为两路信号间的相位夹角，两者的曲线关系如图2所示，其中横坐标为两路信号的相位夹角φ，纵坐标为合成效率η。本发明中，设置两路信号的初始相位差为90°，且调整过程为微调，因此两路信号的相位差可以一直围绕90°上下微动，则(4)式可近似为：Among them, η is the power combination efficiency, φ is the phase angle between the two signals, and the relationship between the two curves is shown in Figure 2, where the abscissa is the phase angle φ of the two signals, and the ordinate is the combination efficiency η. In the present invention, the initial phase difference of the two-way signals is set to 90°, and the adjustment process is fine-tuning, so the phase difference of the two-way signals can always be slightly moved up and down around 90°, then the formula (4) can be approximated as:
其中Δφ为两路信号的相位差调整变化量，本方程的近似也可从图2中得出，在两路信号夹角φ在90°附近时，合成效率曲线近似为直线。Where Δφ is the phase difference adjustment variation of the two signals. The approximation of this equation can also be obtained from Figure 2. When the angle φ between the two signals is around 90°, the synthesis efficiency curve is approximately a straight line.
本发明中以合路信号作为输出信号，因此输出信号的功率电平为Pout＝ηPmax_sum＝η(A1+A2)2，由(5)式可得：In the present invention, the combined signal is used as the output signal, so the power level of the output signal is P out = ηP max_sum =η(A 1 +A 2 ) 2 , which can be obtained from formula (5):
由(6)式可知，由两路信号中幅度变化引起的输出功率变化，可由两路信号的相位适配度调整来进行弥补，最终使得输出功率为恒定。It can be seen from formula (6) that the output power change caused by the amplitude change of the two signals can be compensated by the adjustment of the phase adaptation degree of the two signals, and finally the output power is constant.
图3为在设计的两路信号的其中一路信号上叠加幅度白噪声，经过matlab计算得到合成后的信号对无噪声添加的合成后信号归一化的数据(图3黑色密集实线)。经过对输出信号的幅度采集，采用(6)式计算对相位进行补偿动态调整后，输出信号按无噪声添加的合成后信号归一化后数据如图3沿横轴的白色窄带所示。此处设置反馈环路响应速率为幅度闪烁速率的90％的计算，可见其调整精度可提升30dB。Figure 3 is the superimposed amplitude white noise on one of the two signals designed, and the normalized data of the synthesized signal and the synthesized signal without noise added after calculation by matlab (Figure 3 black dense solid line). After collecting the amplitude of the output signal, and using formula (6) to calculate and dynamically adjust the phase compensation, the output signal is normalized according to the synthesized signal without noise addition, as shown in the white narrow band along the horizontal axis in Figure 3. Here, the response rate of the feedback loop is set to be 90% of the amplitude flicker rate, and it can be seen that the adjustment accuracy can be improved by 30dB.
(二)采用包络检波反馈网络的理论分析(2) Theoretical analysis of the envelope detection feedback network
采用包络检波反馈网络的理论分析如下：The theoretical analysis of the envelope detection feedback network is as follows:
倍频产生的太赫兹信号，其相噪恶化遵从20lgN，其中N为倍频次数。通过微波倍频到太赫兹的技术手段，产生的频率越高，N越大，进而相噪恶化越严重，这是低频信号倍频产生太赫兹信号的固有问题。而相噪在时域中体现在相位抖动上，在合路功率输出上表现为输出电平跃动(jitter)，由于随机相位抖动幅度的数学期望为0，因此对其衡量指标一般按照均方根值计算，如(7)式：The phase noise deterioration of the terahertz signal generated by frequency doubling follows 20lgN, where N is the number of frequency doubling. Through the technical means of microwave frequency multiplication to terahertz, the higher the generated frequency, the larger the N, and the more serious the deterioration of the phase noise. This is an inherent problem in the generation of terahertz signals by frequency multiplication of low-frequency signals. The phase noise is reflected in the phase jitter in the time domain, and is manifested as output level jitter (jitter) in the combined power output. Since the mathematical expectation of the random phase jitter amplitude is 0, its measurement index is generally based on the mean square Calculation of root value, such as formula (7):
其中PPN为相噪功率谱单边带积分值，单位dB。本发明实施例中测试用源的相噪指标为-51.3dBc@1KHz，折算jitter均方根值为0.086(4.9°)，此时合成功率输出跃动最大值与最小值之差为8.6％，因此为了使得相位适配度调整过程能够有效地对功率输出的慢漂移进行校正，有必要对jitter造成的功率闪烁进行处理，本发明中提出采用包络检波的方法，过滤jitter对反馈信号的扰动。Among them, P PN is the phase noise power spectrum SSB integral value, the unit is dB. In the embodiment of the present invention, the phase noise index of the test source is -51.3dBc@1KHz, and the root mean square value of the converted jitter is 0.086 (4.9°). At this time, the difference between the maximum value and the minimum value of the synthesized power output jump is 8.6%. Therefore, in order to enable the phase adaptation adjustment process to effectively correct the slow drift of the power output, it is necessary to deal with the power flicker caused by the jitter. In the present invention, the method of envelope detection is proposed to filter the disturbance of the feedback signal by the jitter .
值得一提的是，由于jitter的数学期望为0，因此长时间的积累中不影响信号的输出功率电平指标，且jitter的快速变化，使得实际探测中无法感知，因此本发明方法并未对jitter造成的功率电平闪烁进行反馈，不但不影响稳幅信号的输出，反而使得幅度调整过程更有针对性。It is worth mentioning that since the mathematical expectation of jitter is 0, the long-term accumulation does not affect the output power level index of the signal, and the rapid change of jitter makes it impossible to perceive in actual detection, so the method of the present invention does not The power level flickering caused by jitter is used for feedback, which not only does not affect the output of the stable amplitude signal, but makes the amplitude adjustment process more targeted.
据此，本发明方法的主要步骤如下：Accordingly, the main steps of the inventive method are as follows:
(1)连接基频信号与功率分配器(1) Connect the baseband signal and the power splitter
如图1所示，将基频信号与功率分配器相连接，实现基频信号的功率分配(分配比例不限，最佳分配方式为等幅分配)，形成多路基频分支信号。设此处形成R路分支信号，则可认为R-1路信号按照最高合成效率的功率合成方式进行合成，并不对其根据反馈进行相位控制，而是仅对剩余的一路进行相位控制，因此此处的R路分支信号仍然可以视同为两路信号处理。As shown in Figure 1, the baseband signal is connected to the power divider to realize the power distribution of the baseband signal (the distribution ratio is not limited, and the best distribution method is equal-amplitude distribution) to form multiple baseband branch signals. Assuming that the R branch signal is formed here, it can be considered that the R-1 signal is combined according to the power combination method with the highest combination efficiency, and the phase control is not performed on it according to the feedback, but only the phase control is performed on the remaining one. Therefore, this The R-way branch signal at can still be regarded as two-way signal processing.
(2)将功率分配器输出的各支路信号馈入锁相环(2) Feed each branch signal output by the power divider into the phase-locked loop
如图1所示，将功率分配器的输出信号直接与对应的锁相环相连接，仅对其中一个支路进行相位动态调控。As shown in Figure 1, the output signal of the power divider is directly connected to the corresponding phase-locked loop, and only one of the branches is dynamically adjusted for phase.
两路倍频输出后的信号最佳相位差为90°，因此当倍频次数为N时，被调整的支路相位预设成与另一路的相位差为90°/N。本例中倍频次数为15，因此被控支路的相位差预置为6°。The optimal phase difference of the signals after the two frequency multiplied outputs is 90°, so when the number of frequency multiplied is N, the phase of the adjusted branch is preset to have a phase difference of 90°/N with the other. In this example, the number of frequency multiplication is 15, so the phase difference of the controlled branch is preset as 6°.
(3)锁相环的输出信号馈入倍频器(3) The output signal of the phase-locked loop is fed into the frequency multiplier
将锁相环的输出信号馈入倍频器。本发明实施例中，倍频器为15倍频，也即N为15，因此输出的太赫兹信号的相位差变为6°×15＝90°。Feed the output signal of the phase-locked loop into the frequency multiplier. In the embodiment of the present invention, the frequency multiplier is multiplied by 15, that is, N is 15, so the phase difference of the output terahertz signal becomes 6°×15=90°.
(4)将倍频器输出的太赫兹信号功率合成(4) Combine the power of the terahertz signal output by the frequency multiplier
将倍频器输出的太赫兹信号接入功率合成器，使之完成功率合成。The terahertz signal output by the frequency multiplier is connected to the power combiner to complete the power combination.
(5)取反馈信号(5) Feedback signal
将功率合成器的输出信号通过定向耦合器取能够驱动检波器的最小功率(此处跟反馈链路接收传感器灵敏度有关，刚好驱动传感器的功率即可，过高的功率反馈输出效率必然下降，过低的输入传感器不在线性区校正工作比较繁琐)，用于反馈。本发明实施例中取信号的1‰。剩余的绝大部分信号用于输出。Pass the output signal of the power combiner through the directional coupler to get the minimum power that can drive the detector (here is related to the sensitivity of the feedback link receiving sensor, just enough to drive the sensor power, too high power feedback output efficiency will inevitably decrease, too high The low input sensor is not in the linear region and the correction work is more cumbersome), for feedback. In the embodiment of the present invention, 1‰ of the signal is taken. Most of the remaining signals are used for output.
(6)对反馈信号进行包络检波(6) Perform envelope detection on the feedback signal
对定向耦合器取出的反馈信号进行包络检波，并通过低通滤波器过滤高频特征，从而提取幅度包络特征，作为太赫兹信号输出功率电平特征信号。Envelope detection is performed on the feedback signal taken out by the directional coupler, and high-frequency features are filtered through a low-pass filter, thereby extracting the amplitude envelope feature, which is used as the characteristic signal of the output power level of the terahertz signal.
(7)反馈驱动锁相环完成相位实时校正(7) Feedback drives the phase-locked loop to complete real-time phase correction
将步骤(6)产生的电平特征信号幅度量作为参量，通过(6)式计算得到对锁相环的修正参数Δφ，并写入锁相环进行相位调整，完成太赫兹稳幅的动态过程。Using the magnitude of the level characteristic signal generated in step (6) as a parameter, the correction parameter Δφ for the phase-locked loop is obtained through formula (6), and written into the phase-locked loop for phase adjustment to complete the dynamic process of terahertz amplitude stabilization .
本发明说明书中未作详细描述的内容属本领域技术人员的公知技术。The content that is not described in detail in the description of the present invention belongs to the well-known technology of those skilled in the art.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610585927.5A CN106209095B (en) | 2016-07-22 | 2016-07-22 | A kind of power combing Terahertz fixed ampllitude method based on phase adjustment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610585927.5A CN106209095B (en) | 2016-07-22 | 2016-07-22 | A kind of power combing Terahertz fixed ampllitude method based on phase adjustment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106209095A true CN106209095A (en) | 2016-12-07 |
| CN106209095B CN106209095B (en) | 2019-03-22 |
Family
ID=57492431
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610585927.5A Active CN106209095B (en) | 2016-07-22 | 2016-07-22 | A kind of power combing Terahertz fixed ampllitude method based on phase adjustment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106209095B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092876A (en) * | 2021-03-30 | 2021-07-09 | 电子科技大学 | Millimeter wave phase change detection method and system based on power synthesis efficiency theory |
| CN114567322A (en) * | 2022-03-28 | 2022-05-31 | 成都威频科技有限公司 | Low-phase noise frequency source circuit and implementation method |
| CN116366059A (en) * | 2023-04-10 | 2023-06-30 | 东西分析(永清)仪器有限公司 | Radio frequency power synthesis circuit and method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5254959A (en) * | 1991-06-28 | 1993-10-19 | U.S. Philips Corporation | Frequency synthesizer having phase control loop with plural branches |
| US5313173A (en) * | 1993-04-26 | 1994-05-17 | Ericsson Ge Mobile Communications Inc. | Quadrature modulated phase-locked loop |
| CN101545930A (en) * | 2008-03-26 | 2009-09-30 | 中国科学院电子学研究所 | Phase detection method based on only amplitude detection |
-
2016
- 2016-07-22 CN CN201610585927.5A patent/CN106209095B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5254959A (en) * | 1991-06-28 | 1993-10-19 | U.S. Philips Corporation | Frequency synthesizer having phase control loop with plural branches |
| US5313173A (en) * | 1993-04-26 | 1994-05-17 | Ericsson Ge Mobile Communications Inc. | Quadrature modulated phase-locked loop |
| CN101545930A (en) * | 2008-03-26 | 2009-09-30 | 中国科学院电子学研究所 | Phase detection method based on only amplitude detection |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113092876A (en) * | 2021-03-30 | 2021-07-09 | 电子科技大学 | Millimeter wave phase change detection method and system based on power synthesis efficiency theory |
| CN113092876B (en) * | 2021-03-30 | 2022-03-15 | 电子科技大学 | Millimeter wave phase change detection method and system based on power combining efficiency theory |
| CN114567322A (en) * | 2022-03-28 | 2022-05-31 | 成都威频科技有限公司 | Low-phase noise frequency source circuit and implementation method |
| CN114567322B (en) * | 2022-03-28 | 2024-10-01 | 成都威频科技有限公司 | Low-phase noise frequency source circuit and implementation method |
| CN116366059A (en) * | 2023-04-10 | 2023-06-30 | 东西分析(永清)仪器有限公司 | Radio frequency power synthesis circuit and method |
| CN116366059B (en) * | 2023-04-10 | 2024-02-06 | 东西分析(永清)仪器有限公司 | Radio frequency power synthesis circuit and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106209095B (en) | 2019-03-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103095378B (en) | Based on DE-MZM automatic bias control device and the control method of PID | |
| CN107528638B (en) | Estimation of Angle of Arrival for Broadband Microwave Signals Based on Microwave Photon Filtering | |
| EP2736181B1 (en) | Optical transmission device, method of optical transmission, and program of optical transmission | |
| CN106338658A (en) | Phase noise measurement method and device based on radio frequency cancellation | |
| EP2525488A1 (en) | Amplifying device and signal processing device | |
| CN106932925B (en) | Bias control device and method based on chaotic signal | |
| CN106209095A (en) | A kind of power combing Terahertz fixed ampllitude method adjusted based on phase place | |
| CN106209252B (en) | Cascade the arbitrary points MZM autobias control method | |
| CN106208974A (en) | A kind of design method of digital power amplifier based on adaptive digital envelop following technology | |
| CN106534038A (en) | Ultra-wide-band complex-format vector modulation error correction method based on two-stage predistortion | |
| CN105867497B (en) | A Method of Adaptive Control of Bias Voltage of MZ Modulator | |
| CN102624460A (en) | An optical fiber linear transmission modulator and its third-order intermodulation suppression method | |
| CN107547138A (en) | Multiplier parameter is tunable phase-coded signal optics generation device and method | |
| US20130141772A1 (en) | Sensitivity Improvement of Mach-Zehnder Modulator Bias Control | |
| TW201336276A (en) | Transceiver IQ calibration system and associated method | |
| CN110677196A (en) | Bias control method based on double parallel Mach-Zehnder modulator | |
| CN106712857A (en) | Control method and system for dual-polarization IQ modulator | |
| CN105302019A (en) | An electro-optic modulator bias operating point control device and method | |
| CN110417366A (en) | Radio-frequency power amplifier control device and radio-frequency power amplifier | |
| CN103576071B (en) | A kind of method of accurate Characterization power transistor matching properties | |
| CN104092491B (en) | Optical-electronic oscillator produces the apparatus and method of optical frequency com | |
| CN101317351A (en) | Dispersion detection method and device and optical signal transmission system | |
| CN102156499B (en) | Method and device for bias control for optical phase delayer based on logarithm detection | |
| CN104467979B (en) | Method and device for identifying conjugate relationship of QPSK signal, and dispersion compensation method and system | |
| CN108964758B (en) | Method and system for measuring chirp parameters of double-parallel Mach-Zehnder modulator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |