WO2024074045A1 - 移相控制系统及方法 - Google Patents

移相控制系统及方法 Download PDF

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Publication number
WO2024074045A1
WO2024074045A1 PCT/CN2023/095503 CN2023095503W WO2024074045A1 WO 2024074045 A1 WO2024074045 A1 WO 2024074045A1 CN 2023095503 W CN2023095503 W CN 2023095503W WO 2024074045 A1 WO2024074045 A1 WO 2024074045A1
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WIPO (PCT)
Prior art keywords
liquid crystal
transmission line
signal transmission
voltage
dielectric constant
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PCT/CN2023/095503
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English (en)
French (fr)
Inventor
杨能文
贺文容
Original Assignee
中信科移动通信技术股份有限公司
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Application filed by 中信科移动通信技术股份有限公司 filed Critical 中信科移动通信技术股份有限公司
Priority to MX2023014140A priority Critical patent/MX2023014140A/es
Priority to EP23800720.7A priority patent/EP4376212A4/en
Publication of WO2024074045A1 publication Critical patent/WO2024074045A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/18—Phase-shifters
    • H01P1/184—Strip line phase-shifters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element

Definitions

  • the present disclosure relates to the field of communication technology, and in particular to a phase shift control system and method.
  • Phase shifters are common electronic devices that are mainly used to control the phase of RF transmission signals. They are essential devices for phased array antenna systems, mobile communication systems, etc.
  • phase (electrical length) of the signal transmission line inside the phase shifter By changing the phase (electrical length) of the signal transmission line inside the phase shifter, the phase of the corresponding radiating unit in the antenna array is changed, which in turn affects the synthetic beam of the antenna radiating unit and achieves the purpose of controlling the antenna beam.
  • the phase (electrical length) of the RF signal depends on the physical length of the signal transmission line and the dielectric constant of the signal transmission line medium. Therefore, there are two types of phase shifters: one is to change the physical length of the signal transmission line, and the other is to change the dielectric constant of the medium in the signal transmission line, so as to achieve the purpose of changing the electrical length.
  • the liquid crystal phase shifter system includes a liquid crystal phase shifter 10 and a voltage control module 20.
  • the liquid crystal phase shifter includes an upper substrate 11, a signal transmission line 12, a ground layer 14, a lower substrate 15, and a liquid crystal layer 13 between the signal transmission line 12 and the ground layer 14.
  • the voltage control module 20 changes the voltage between the signal transmission line 12 and the ground layer 14.
  • the voltage between the two electrodes is adjusted to control the deflection amount of the liquid crystal layer 13.
  • the change in the deflection amount of the liquid crystal layer 13 will cause the dielectric constant of the surrounding effective area in the signal transmission line 12 to change, thereby changing the electrical length of the signal transmission line 12 and achieving the purpose of changing the phase of the signal transmission line.
  • the dielectric constant of liquid crystal materials is affected not only by the applied voltage but also by external factors such as temperature and pressure in the surrounding environment. Simply controlling the applied voltage cannot guarantee the phase shift accuracy of the liquid crystal phase shifter based on liquid crystal materials.
  • a phase shift control system comprising:
  • the capacitance detection module is connected to the signal transmission line and the ground layer in the liquid crystal phase shifter respectively, and is used to detect the capacitance value between the signal transmission line and the ground layer, and transmit the capacitance value to the voltage control module;
  • the voltage control module is respectively connected to the capacitance detection module, the signal transmission line in the liquid crystal phase shifter and the ground layer, and is used to adjust the voltage between the signal transmission line and the ground layer according to the actual measured value of the dielectric constant of the liquid crystal layer in the liquid crystal phase shifter until the difference between the voltage and the target voltage is less than or equal to a preset deviation.
  • the actual measured value of the dielectric constant is determined based on the capacitance value between the signal transmission line and the ground layer transmitted by the capacitance detection module.
  • the target voltage is determined according to a target value of a dielectric constant of the liquid crystal layer.
  • a target value of a dielectric constant is determined according to a phase value.
  • a signal transmission line is arranged on a side of a first substrate in a liquid crystal phase shifter close to a liquid crystal layer
  • a ground layer is arranged on a side of a second substrate in the liquid crystal phase shifter close to a liquid crystal layer
  • the liquid crystal layer is arranged between the first substrate and the second substrate.
  • a first substrate and a second substrate are arranged in parallel.
  • the liquid crystal layer adopts a single liquid crystal material. material or mixed liquid crystal material.
  • phase shift control method comprising:
  • the capacitance detection module detects the capacitance value between the signal transmission line and the ground layer in the liquid crystal phase shifter, and transmits the capacitance value to the voltage control module, and the capacitance detection module is connected to the signal transmission line and the ground layer respectively;
  • the voltage between the signal transmission line and the ground layer is adjusted according to the actual measured value of the dielectric constant of the liquid crystal layer in the liquid crystal phase shifter through the voltage control module until the difference between the voltage and the target voltage is less than or equal to the preset deviation.
  • the voltage control module is respectively connected to the capacitance detection module, the signal transmission line in the liquid crystal phase shifter and the ground layer.
  • the actual measured value of the dielectric constant is determined based on the capacitance value between the signal transmission line and the ground layer transmitted by the capacitance detection module.
  • the preset conditions include:
  • the difference between the actual dielectric constant value and the target dielectric constant value is less than or equal to the preset deviation value.
  • a target value of a dielectric constant is determined according to a phase value.
  • a signal transmission line is arranged on a side of a first substrate in a liquid crystal phase shifter close to a liquid crystal layer
  • a ground layer is arranged on a side of a second substrate in the liquid crystal phase shifter close to a liquid crystal layer
  • the liquid crystal layer is arranged between the first substrate and the second substrate
  • the first substrate and the second substrate are arranged in parallel.
  • FIG1 is a schematic diagram of the structure of a liquid crystal phase shifter provided by the prior art
  • FIG2 is a schematic structural diagram of a phase shift control system according to an embodiment of the present disclosure.
  • FIG3 is a flow chart of a phase shift control method according to an embodiment of the present disclosure.
  • 10 liquid crystal phase shifter
  • 11 first substrate
  • 12 signal transmission line
  • 13 liquid crystal layer
  • 14 ground layer
  • 15 second substrate
  • 20 voltage control module
  • 30 capacitance detection module
  • FIG2 is a schematic diagram of the structure of a phase shift control system provided by the present disclosure. As shown in FIG2 , the system includes:
  • the capacitance detection module 30 is connected to the signal transmission line 12 and the ground layer 14 in the liquid crystal phase shifter 10, respectively, and is used to detect the capacitance value between the signal transmission line 12 and the ground layer 14, and transmit the capacitance value to the voltage control module 20;
  • the voltage control module 20 is respectively connected to the signal transmission line 12 and the ground layer 14 in the liquid crystal phase shifter 10, and is used to adjust the voltage between the signal transmission line 12 and the ground layer 14 according to the actual measured value of the dielectric constant of the liquid crystal layer 13 in the liquid crystal phase shifter 10 until the difference between the voltage and the target voltage is less than or equal to a preset deviation.
  • the actual measured value of the dielectric constant is determined based on the capacitance value between the signal transmission line 12 and the ground layer 14 transmitted by the capacitance detection module 30.
  • the phase shift control system may specifically include a liquid crystal phase shifter 10 , a voltage control module 20 and a capacitance detection module 30 .
  • the capacitance detection module 30 is used to detect the capacitance value between the signal transmission line 12 and the ground layer 14, and transmit the capacitance value to the voltage control module 20.
  • the voltage control module 20 obtains the actual measured dielectric constant of the liquid crystal layer 13 based on the capacitance value based on the pre-stored first corresponding relationship.
  • C is the capacitance value
  • ⁇ is the dielectric constant
  • S is the area of the capacitor plate
  • d is the distance between the capacitor plates
  • the voltage control module 20 adjusts the voltage between the signal transmission line 12 and the ground layer 14 according to the calculated measured value of the dielectric constant until the difference between the voltage and the target voltage is less than or equal to the preset deviation, so as to control the deflection of the liquid crystal layer 13, thereby changing the dielectric constant of the medium surrounding the signal transmission line 12, and further changing the phase value of the signal transmission line 12, thereby achieving the purpose of changing the phase.
  • the capacitance detection module 30 detects the capacitance value between the signal transmission line 12 and the ground layer 14 in the liquid crystal phase shifter 10 .
  • the voltage control module 20 adjusts the voltage between the signal transmission line 12 and the ground layer 14 according to the measured value of the dielectric constant of the liquid crystal layer 13 in the liquid crystal phase shifter 10, and repeats the process until the difference between the voltage and the target voltage corresponding to the target value of the dielectric constant is less than or equal to the preset deviation, completing the phase shifting process of the liquid crystal phase shifter. At this time, the measured value of the dielectric constant approaches or is equal to the target value of the dielectric constant.
  • the preset deviation can be set to zero or close to zero.
  • the preset deviation is zero, it means that the actual measured value of the dielectric constant is consistent with the target value of the dielectric constant; when the preset deviation is close to zero, it means that the actual measured value of the dielectric constant is close to the target value of the dielectric constant.
  • the target voltage is determined according to the target value of the dielectric constant of the liquid crystal layer.
  • the dielectric constant target value can be specifically the dielectric constant value of the medium of the liquid crystal layer under the condition of the required phase value. More specifically, the target voltage required by the voltage control module 20 can be obtained from experimental data statistics, that is, the dielectric constant target value corresponding to The voltage value between the signal transmission line 12 and the formation 14 is adjusted to the target voltage by the voltage control module 20, and the capacitance detection module 20 is used to detect the capacitance value between the signal transmission line 12 and the formation 14, and then the actual measured value of the dielectric constant is obtained according to the pre-stored first corresponding relationship.
  • the voltage control module 20 adjusts the voltage between the signal transmission line 12 and the formation 14 until the difference between the voltage and the target voltage is less than or equal to the preset deviation. For example, when the measured value of the dielectric constant is less than the target value of the dielectric constant, the voltage between the signal transmission line 12 and the formation 14 is increased; when the measured value of the dielectric constant is greater than the target value of the dielectric constant, the voltage between the signal transmission line 12 and the formation 14 is decreased.
  • the dielectric constant target value is determined according to the phase value.
  • phase value requirement based on a pre-stored calculation formula between the phase value and the dielectric constant, a target value of the dielectric constant of the liquid crystal layer 13 corresponding to the phase value is obtained.
  • ⁇ is the phase value
  • ⁇ is the dielectric constant
  • L is the physical length of the signal transmission line
  • ⁇ is the wavelength of the electromagnetic wave of a specific frequency
  • the liquid crystal phase shifter 10 may specifically include a first substrate 11, a signal transmission line 12, a liquid crystal layer 13, a ground layer 14 and a second substrate 15.
  • the first substrate 11, the signal transmission line 12, the liquid crystal layer 13, the ground layer 14 and the second substrate 15 are arranged from top to bottom or from bottom to top.
  • the signal transmission line 12 is arranged on a side of the first substrate 11 in the liquid crystal phase shifter 10 close to the liquid crystal layer 13
  • the ground layer 14 is arranged on a side of the second substrate 15 in the liquid crystal phase shifter 10 close to the liquid crystal layer 13
  • the liquid crystal layer 13 is arranged between the first substrate 11 and the second substrate 15. Between the two substrates 15.
  • the first substrate 11 and the second substrate 15 are arranged in parallel.
  • the first substrate 11 is disposed on an upper portion of the liquid crystal phase shifter 10
  • the second substrate 15 is disposed on a lower portion of the liquid crystal phase shifter 10
  • the first substrate 11 and the second substrate 15 are disposed in parallel.
  • liquid crystal phase shifter 10 is introduced here, and any liquid crystal phase shifter with the basic principle can be applied to the phase shift control system disclosed in the present invention, which will not be elaborated in detail here.
  • the liquid crystal layer 13 is made of a single liquid crystal material or a mixed liquid crystal material.
  • the liquid crystal layer 13 may be made of a single liquid crystal material, such as nematic liquid crystal, twisted nematic liquid crystal, etc.
  • the liquid crystal layer 13 may also be made of mixed liquid crystal materials, such as mixed crystals.
  • the liquid crystal layer 13 may have a uniform thickness in the radial direction, thereby having a better phase shift effect.
  • the thickness of the liquid crystal layer 13 may be determined according to actual needs, for example, according to needs such as phase value, response time, insertion loss, etc.
  • the feedback mechanism disclosed in the present invention can improve the phase shift accuracy of the radio frequency signal, thereby improving the accuracy of antenna shaping.
  • the phase shift control system provided by the present invention has added a feedback mechanism compared with the prior art.
  • a capacitance detection module is added on the basis of the existing liquid crystal phase shifter control system.
  • the capacitance value between the signal transmission line and the formation is detected by the capacitance detection module.
  • the actual measured value of the dielectric constant of the liquid crystal layer is calculated by comparing the actual measured value of the dielectric constant with the target value of the dielectric constant, and the voltage between the signal transmission line and the formation is adjusted, thereby eliminating the influence of external factors such as temperature and pressure in the surrounding environment, making the phase shift more accurate and with higher precision.
  • phase shift control method provided by the present disclosure is described below.
  • the phase shift control method described below is implemented based on the phase shift control system described above.
  • FIG3 is a flow chart of a phase shift control method provided by the present disclosure, as shown in FIG3 , comprising:
  • Step 310 detecting the capacitance value between the signal transmission line and the ground layer in the liquid crystal phase shifter by means of a capacitance detection module, and transmitting the capacitance value to a voltage control module, wherein the capacitance detection module is connected to the signal transmission line and the ground layer respectively;
  • Step 320 adjusting the voltage between the signal transmission line and the ground layer according to the measured value of the dielectric constant of the liquid crystal layer in the liquid crystal phase shifter through the voltage control module until the difference between the voltage and the target voltage is less than or equal to the preset deviation, the voltage control module is respectively connected to the capacitance detection module, the signal transmission line in the liquid crystal phase shifter and the ground layer, and the measured value of the dielectric constant is determined based on the capacitance value between the signal transmission line and the ground layer transmitted by the capacitance detection module.
  • the target voltage is determined according to a target value of a dielectric constant of the liquid crystal layer.
  • the dielectric constant target value is determined according to the phase value.
  • the signal transmission line is arranged on a side of the first substrate in the liquid crystal phase shifter close to the liquid crystal layer
  • the ground layer is arranged on a side of the second substrate in the liquid crystal phase shifter close to the liquid crystal layer
  • the liquid crystal layer is arranged between the first substrate and the second substrate, and the first substrate and the second substrate are arranged in parallel.
  • the phase shift control method provided by the present invention adds a feedback mechanism compared with the prior art, and adds a capacitance detection module on the basis of the existing liquid crystal phase shifter.
  • the capacitance detection module detects the capacitance value between the signal transmission line and the formation, and calculates the actual measured value of the dielectric constant of the liquid crystal layer through the tested capacitance value.
  • the actual measured value of the dielectric constant and the target value of the dielectric constant are compared, and the voltage between the signal transmission line and the formation is adjusted, thereby eliminating the influence of external factors such as temperature and pressure in the surrounding environment, making the phase shift more accurate and with higher precision.

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  • Waveguide Switches, Polarizers, And Phase Shifters (AREA)
  • Networks Using Active Elements (AREA)

Abstract

本公开提供一种移相控制系统及方法，系统包括：电容检测模块，用于检测信号传输线与地层之间的电容值；电压控制模块，分别与液晶移相器中的信号传输线和地层连接，用于根据液晶层的介电常数实测值调整电压，直至电压与目标电压之间的差值小于等于预设偏差。

Description

移相控制系统及方法
相关申请的交叉引用
本公开要求于2022年10月8日在中国知识产权局提交的申请号为No.2022112229482，标题为“移相控制系统及方法”的中国专利申请的优先权，通过引用将该中国专利申请公开的全部内容并入本文。
技术领域
本公开涉及通信技术领域，尤其涉及一种移相控制系统及方法。
背景技术
移相器作为一种常见的电子器件，主要用于对射频传输信号的相位进行调控，是相控阵天线系统、移动通信系统等必需的器件。通过改变移相器内部信号传输线的相位(电长度)，从而改变天线阵列中对应辐射单元的相位，进而影响天线辐射单元合成波束，实现控制天线波束的目的。而射频信号的相位(电长度)取决于信号传输线的物理长度和信号传输线介质的介电常数，因此移相器分为两种：一种是改变信号传输线物理长度，另外一种是改变信号传输线中介质的介电常数，从而达到改变电长度的目的。
液晶是一种介电常数可以通过外加电压控制的材料，随着外加电压的改变介电常数可以对应改变化。基于液晶材料的液晶移相器系统已经有众多方案，基本原理相同，如图1所示，液晶移相器系统包括液晶移相器10和电压控制模块20，液晶移相器包括上基板11、信号传输线12、地层14、下基板15以及在信号传输线12和地层14之间的液晶层13，通过电压控制模块20改变信号传输线12和地层14之 间的电压，从而控制液晶层13偏转量，液晶层13的偏转量改变会造成信号传输线12中周围有效区域的介电常数变化，从而改变信号传输线12的电长度，达到改变信号传输线相位的目的。
但是液晶材料的介电常数除了受外加电压影响外，还受到周围环境诸如温度、压力等外界因素影响，单一控制外加电压并不能保证基于液晶材料的液晶移相器的移相精度。
发明内容
根据本公开的第一方面，提供了一种移相控制系统，包括：
电容检测模块，分别与液晶移相器中的信号传输线和地层连接，用于检测信号传输线与地层之间的电容值，并将电容值传输给电压控制模块；
电压控制模块，分别与电容检测模块、液晶移相器中的信号传输线和地层连接，用于根据液晶移相器中的液晶层的介电常数实测值调整信号传输线和地层之间的电压，直至电压与目标电压之间的差值小于等于预设偏差，介电常数实测值是根据电容检测模块传输的信号传输线和地层之间的电容值确定的。
根据本公开实施例的一种移相控制系统，目标电压是根据液晶层的介电常数目标值确定的。
根据本公开实施例的一种移相控制系统，介电常数目标值是根据相位值确定的。
根据本公开实施例的一种移相控制系统，信号传输线设置在液晶移相器中的第一基板靠近液晶层的一侧，地层设置在液晶移相器中的第二基板靠近液晶层的一侧，液晶层设置在第一基板和第二基板之间。
根据本公开实施例的一种移相控制系统，第一基板和第二基板平行设置。
根据本公开实施例的一种移相控制系统，液晶层采用单一液晶材 料或混合液晶材料。
根据本公开的第二方面，提供了一种移相控制方法，包括：
通过电容检测模块检测液晶移相器中的信号传输线和地层之间的电容值，并将电容值传输给电压控制模块，电容检测模块分别与信号传输线和地层连接；
通过电压控制模块根据液晶移相器中的液晶层的介电常数实测值调整信号传输线和地层之间的电压，直至电压与目标电压之间的差值小于等于预设偏差，电压控制模块分别与电容检测模块、液晶移相器中的信号传输线和地层连接，介电常数实测值是根据电容检测模块传输的信号传输线和地层之间的电容值确定的。
根据本公开实施例的一种移相控制方法，预设条件，包括：
介电常数实测值与介电常数目标值之间的差值小于等于预设偏差值。
根据本公开实施例的一种移相控制方法，介电常数目标值是根据相位值确定的。
根据本公开实施例的一种移相控制方法，信号传输线设置在液晶移相器中的第一基板靠近液晶层的一侧，地层设置在液晶移相器中的第二基板靠近液晶层的一侧，液晶层设置在第一基板和第二基板之间，第一基板和第二基板平行设置。
附图说明
为了更清楚地说明本公开的技术方案，下面将对实施例描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是现有技术提供的液晶移相器的结构示意图；
图2是根据本公开实施例的移相控制系统的结构示意图；
图3是根据本公开实施例的移相控制方法的流程示意图。
附图说明：
10：液晶移相器；       11：第一基板；        12：信号传输线；
13：液晶层；           14：地层；            15：第二基板；
20：电压控制模块；     30：电容检测模块。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合本公开中的附图，对本公开中的技术方案进行清楚地描述，显然，所描述的实施例是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
图2是本公开提供的移相控制系统的结构示意图，如图2所示，系统包括：
电容检测模块30，分别与液晶移相器10中的信号传输线12和地层14连接，用于检测信号传输线12与地层14之间的电容值，并将电容值传输给电压控制模块20；
电压控制模块20，分别与液晶移相器10中的信号传输线12和地层14连接，用于根据液晶移相器10中的液晶层13的介电常数实测值调整信号传输线12和地层14之间的电压，直至电压与目标电压之间的差值小于等于预设偏差，介电常数实测值是根据电容检测模块30传输的信号传输线12和地层14之间的电容值确定的。
可选地，本公开提供的移相控制系统，可以具体包括，液晶移相器10、电压控制模块20和电容检测模块30。
电容检测模块30用以检测信号传输线12和地层14之间的电容值，并将该电容值传输给电压控制模块20。电压控制模块20根据该电容值基于预存的第一对应关系获取液晶层13的实际测量的介电常 数，即介电常数实测值。该第一对应关系可以具体下面的介电常数与电容值之间的计算公式得到。
C＝ε*S/d
其中，C为电容值，ε为介电常数，S为电容级板正对面积，d为电容级板间距离；
可见，针对同一液晶移相器10，介电常数和电容值存在确定的第一对应关系。
电压控制模块20根据计算得到的介电常数实测值，调整信号传输线12和地层14之间的电压，直至电压与目标电压之间的差值小于等于预设偏差，以控制液晶层13偏转，从而改变信号传输线12周围介质的介电常数，进而改变信号传输线12相位值，达到改变相位的目的。
电容检测模块30检测液晶移相器10中的信号传输线12和地层14之间的电容值。
电压控制模块20根据液晶移相器10中的液晶层13的介电常数实测值调整信号传输线12和地层14之间的电压，重复该过程，直至该电压与介电常数目标值对应的目标电压之间的差值小于等于预设偏差，完成液晶移相器的移相过程。此时介电常数实测值趋近或等于介电常数目标值。
该预设偏差可以设置为零也可以设置为接近于零，当预设偏差为零时，代表介电常数实测值与介电常数目标值一致；当预设偏差值接近于零时，代表介电常数实测值与介电常数目标值接近。进一步地，在一个实施例中，目标电压是根据液晶层的介电常数目标值确定的。
按照介电常数目标值，该介电常数目标值可以具体为在所需相位值的情况下，液晶层的介质的介电常数值。更具体可以由实验数据统计取得电压控制模块20需要的目标电压，即介电常数目标值所对应 的信号传输线12和地层14之间的电压值。调整电压控制模块20的电压值到目标电压，并利用电容检测模块20检测信号传输线12和地层14之间的电容值，进而依照预存的第一对应关系得到介电常数实测值。
对比介电常数实测值和介电常数目标值，电压控制模块20调整信号传输线12和地层14之间的电压，直至电压与目标电压之间的差值小于等于预设偏差。例如，在介电常数实测值小于介电常数目标值时，调大信号传输线12和地层14之间的电压；在介电常数实测值大于介电常数目标值时，调小信号传输线12和地层14之间的电压。
进一步地，在一个实施例中，介电常数目标值是根据相位值确定的。
可选地，按照相位值需求，基于预存的相位值与介电常数之间的计算公式，获取该相位值对应的液晶层13的介电常数目标值。
需要说明的是，相位值与介电常数之间的计算公式如下：
其中，φ为相位值，ε为介电常数，L为信号传输线的物理长度，λ为特定频率电磁波的波长；
可见，针对特定频率的信号和同一液晶移相器10，相位值和介电常数存在确定关系。
该液晶移相器10可以具体包括第一基板11、信号传输线12、液晶层13、地层14以及第二基板15。第一基板11、信号传输线12、液晶层13、地层14以及第二基板15采用自上而下或者自下而上设置。
在一个实施例中，信号传输线12设置在液晶移相器10中的第一基板11靠近液晶层13的一侧，地层14设置在液晶移相器10中的第二基板15靠近液晶层13的一侧，液晶层13设置在第一基板11和第 二基板15之间。
在一个实施例中，第一基板11和第二基板15平行设置。
可选地，第一基板11设置在液晶移相器10上部，第二基板15设置在液晶移相器10下部，且第一基板11和第二基板15平行设置。
这里需要说明的是，这里仅仅介绍了液晶移相器10的基本组成，易于基本原理的液晶移相器都可应用于本公开一种移相控制系统中，这里不做详细展开。
在一个实施例中，液晶层13采用单一液晶材料或混合液晶材料。
可选地，液晶层13可以具体采用单一液晶材料制作而成，例如向列相液晶、扭曲向列相液晶等。
液晶层13也可以具体采用混合液晶材料制作而成，例如混晶等。
在本公开的另一些实施例中，液晶层13可以在径向上具有均勾的厚度，从而具有更好的移相效果。液晶层13的厚度可以根据实际需求而定，例如，根据相位值、响应时间、插入损耗等需求而定。
通过本公开的反馈机制能够实现提高对射频信号的移相精度，进而提高天线赋形的精度。
本公开提供的移相控制系统，与现有技术相比增加了反馈机制，在现有液晶移相器控制系统基础上增加了电容检测模块，通过电容检测模块检测信号传输线和地层之间的电容值，通过检测到的电容值，计算出液晶层的介电常数实测值，对比介电常数实测值和介电常数目标值，调整信号传输线和地层之间的电压，消除了周围环境诸如温度、压力等外界因素影响，使得移相更加准确，精度更高。
下面对本公开提供的移相控制方法进行描述，下文描述的移相控制方法是基于上文描述的移相控制系统实现的。
图3是本公开提供的移相控制方法的流程示意图，如图3所示，包括：
步骤310，通过电容检测模块检测液晶移相器中的信号传输线和地层之间的电容值，并将电容值传输给电压控制模块，电容检测模块分别与信号传输线和地层连接；
步骤320，通过电压控制模块根据液晶移相器中的液晶层的介电常数实测值调整信号传输线和地层之间的电压，直至电压与目标电压之间的差值小于等于预设偏差，，电压控制模块分别与电容检测模块、液晶移相器中的信号传输线和地层连接，介电常数实测值是根据电容检测模块传输的信号传输线和地层之间的电容值确定的。
进一步地，在一个实施例中，目标电压是根据液晶层的介电常数目标值确定的。
进一步地，在一个实施例中，介电常数目标值是根据相位值确定的。
进一步地，在一个实施例中，信号传输线设置在液晶移相器中的第一基板靠近液晶层的一侧，地层设置在液晶移相器中的第二基板靠近液晶层的一侧，液晶层设置在第一基板和第二基板之间，第一基板和第二基板平行设置。
本公开提供的移相控制方法，与现有技术相比增加了反馈机制，在现有液晶移相器基础上增加了电容检测模块，通过电容检测模块检测信号传输线和地层之间的电容值，通过测试的电容值，计算出液晶层的介电常数实测值，对比介电常数实测值和介电常数目标值，调整信号传输线和地层之间的电压，消除了周围环境诸如温度、压力等外界因素影响，使得移相更加准确，精度更高。
最后应说明的是：以上实施例仅用以说明本公开的技术方案，而非对其限制；尽管参照前述实施例对本公开进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修 改或者替换，并不使相应技术方案的本质脱离本公开各实施例技术方案的精神和范围。

Claims (10)

  1. 一种移相控制系统，包括：
    电容检测模块，分别与液晶移相器中的信号传输线和地层连接，用于检测所述信号传输线与所述地层之间的电容值，并将所述电容值传输给电压控制模块；
    所述电压控制模块，分别与所述电容检测模块、所述液晶移相器中的所述信号传输线和所述地层连接，用于根据所述液晶移相器中的液晶层的介电常数实测值调整所述信号传输线和所述地层之间的电压，直至所述电压与目标电压之间的差值小于等于预设偏差，所述介电常数实测值是根据所述电容检测模块传输的所述信号传输线和所述地层之间的电容值确定的。
  2. 根据权利要求1所述的移相控制系统，其中，所述目标电压是根据所述液晶层的介电常数目标值确定的。
  3. 根据权利要求1所述的移相控制系统，其中，所述介电常数目标值是根据相位值确定的。
  4. 根据权利要求1所述的移相控制系统，其中，所述信号传输线设置在所述液晶移相器中的第一基板靠近所述液晶层的一侧，所述地层设置在所述液晶移相器中的第二基板靠近所述液晶层的一侧，所述液晶层设置在所述第一基板和所述第二基板之间。
  5. 根据权利要求4所述的移相控制系统，其中，所述第一基板和所述第二基板平行设置。
  6. 根据权利要求1-5任一项所述的移相控制系统，其中，所述液晶层采用单一液晶材料或混合液晶材料。
  7. 一种基于权利要求1-6任一项所述的移相控制系统的移相控制方法，包括：
    通过所述电容检测模块检测液晶移相器中的信号传输线和地层之间的电容值，并将所述电容值传输给所述电压控制模块，所述电容检测模块分别与所述信号传输线和所述地层连接；
    通过所述电压控制模块根据所述液晶移相器中的液晶层的介电常数实测值调整所述信号传输线和所述地层之间的电压，直至所述电压与目标电压之间的差值小于等于预设偏差，所述电压控制模块分别与所述电容检测模块、所述液晶移相器中的所述信号传输线和所述地层连接，所述介电常数实测值是根据所述电容检测模块传输的所述信号传输线和所述地层之间的电容值确定的。
  8. 一种基于权利要求7所述的移相控制方法，其中，所述目标电压是根据所述液晶层的介电常数目标值确定的。
  9. 根据权利要求7所述的移相控制方法，其中，所述介电常数目标值是根据相位值确定的。
  10. 根据权利要求7所述的移相控制方法，其中所述信号传输线设置在所述液晶移相器中的第一基板靠近所述液晶层的一侧，所述地层设置在所述液晶移相器中的第二基板靠近所述液晶层的一侧，所述液晶层设置在所述第一基板和所述第二基板之间，所述第一基板和所述第二基板平行设置。
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