CN111883881A - Continuous adjustable phase shifter based on multimode resonator - Google Patents
Continuous adjustable phase shifter based on multimode resonatorDownload PDFInfo
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- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
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- 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
- H01Q3/26—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture
- H01Q3/30—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array
- H01Q3/34—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means
- H01Q3/36—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 relative phase or relative amplitude of energisation between two or more active radiating elements; varying the distribution of energy across a radiating aperture varying the relative phase between the radiating elements of an array by electrical means with variable phase-shifters
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Abstract
Description
Translated fromChinese技术领域technical field
本发明属于移相器技术领域，具体为一种基于多模谐振器的连续可调移相器。The invention belongs to the technical field of phase shifters, in particular to a continuously adjustable phase shifter based on a multi-mode resonator.
背景技术Background technique
阵列天线通过引入可变移相器和幅度调节器来调控天线阵中各阵元的幅相，从而形成并控制波束，具有灵活的空间选择性。其中，具有代表性的相控阵已广泛用于军事与民用的现代无线通信系统中。移相器是相控阵和其他阵列天线的馈电网络中的关键组件。The array antenna controls the amplitude and phase of each array element in the antenna array by introducing variable phase shifters and amplitude regulators, thereby forming and controlling beams, with flexible spatial selectivity. Among them, the representative phased array has been widely used in modern wireless communication systems for military and civilian use. Phase shifters are key components in the feed network of phased arrays and other array antennas.
当前，移相器可分为开关线型移相器、加载线型移相器与反射型移相器。开关线型移相器是指通过控制开关改变信号的传输路径，从而实现不同输出相位的切换；电路设计简单，但相位不能连续调节，且随着所需相位值的增多，移相器开关数量与尺寸迅速增大，难以满足大规模相控阵对高分辨率、低损耗、低成本移相器的要求。加载线型移相器结构紧凑、调控方便，但传输线特征阻抗会随着加载电容的增大而发生变化，调谐范围将受到匹配带宽的限制。反射型移相器通过可变负载改变电抗网络特性，有宽的相移范围与连续调相的优点，但带宽较窄，相位线性度不好。At present, phase shifters can be divided into switching linear phase shifters, loaded linear phase shifters and reflection type phase shifters. The switching linear phase shifter refers to changing the transmission path of the signal by controlling the switch, so as to realize the switching of different output phases; the circuit design is simple, but the phase cannot be continuously adjusted, and with the increase of the required phase value, the number of phase shifters switches With the rapid increase in size, it is difficult to meet the requirements of large-scale phased arrays for high-resolution, low-loss, and low-cost phase shifters. The loaded linear phase shifter has a compact structure and is easy to control, but the characteristic impedance of the transmission line will change with the increase of the loading capacitance, and the tuning range will be limited by the matching bandwidth. Reflective phase shifters change the characteristics of the reactance network through variable loads, and have the advantages of wide phase shift range and continuous phase modulation, but the bandwidth is narrow and the phase linearity is not good.
综上所述，可调移相器已经有了一定的发展。但能满足天线系统对宽扫描范围，宽带宽和精确辐射方向图等要求的宽带大范围高分辨率连续电调移相器仍然是研究热点。To sum up, the adjustable phase shifter has been developed to some extent. However, broadband, large-scale, high-resolution continuous electrical modulation phase shifters that can meet the requirements of antenna systems for wide scanning range, wide bandwidth and precise radiation patterns are still a research hotspot.
发明内容SUMMARY OF THE INVENTION
本发明的目的在于提供了一种基于多模谐振器的连续可调移相器，以解决现有移相器开关数量多、带宽受限、匹配不好、分辨率不够高、线性度差等问题。The purpose of the present invention is to provide a continuously adjustable phase shifter based on a multi-mode resonator, so as to solve the problem of the large number of switches, limited bandwidth, poor matching, insufficient resolution, poor linearity, etc. question.
实现本发明的技术解决方案为：一种基于多模谐振器的连续可调移相器，The technical solution for realizing the present invention is: a continuously adjustable phase shifter based on a multi-mode resonator,
包括控制电路、匹配控制模块、谐振模控制模块和移相器主体；Including a control circuit, a matching control module, a resonant mode control module and a phase shifter body;
所述控制电路用于分别或同时对匹配控制模块、谐振模控制模块进行馈电；The control circuit is used for feeding the matching control module and the resonant mode control module separately or simultaneously;
所述匹配控制模块用于控制所述移相器主体的匹配；The matching control module is used to control the matching of the phase shifter body;
所述谐振模控制模块用于控制所述移相器主体的谐振模；所述移相器主体的谐振膜与匹配都可调。The resonant mode control module is used to control the resonant mode of the phase shifter body; the resonant film and matching of the phase shifter body are adjustable.
优选地，所述谐振模控制模块包括谐振模调相模块和谐振模调节相位斜率模块，所述谐振模调相模块，用于控制移相器主体的谐振模进行相位调节；所述谐振模调节相位斜率模块，用于控制移相器主体的谐振模进行相位斜率调节。Preferably, the resonant mode control module includes a resonant mode phase adjustment module and a resonant mode adjustment phase slope module, the resonant mode phase adjustment module is used to control the resonant mode of the phase shifter main body to perform phase adjustment; the resonant mode adjustment The phase slope module is used to control the resonant mode of the phase shifter body to adjust the phase slope.
优选地，所述匹配控制模块采用具有调相器件的匹配调相模块。Preferably, the matching control module adopts a matching phase modulation module with a phase modulation device.
优选地，包括与移相器主体输出端连接的数字移相器。Preferably, a digital phase shifter connected to the output end of the phase shifter body is included.
优选地，所述数字移相器包括三个双刀双掷开关SW1,SW2,SW3和3组相位差分别为30°，60°和90°的延迟线，其中，一个双刀双掷开关并联连接一组有相位差的延迟线，组成一个相移单元，每个相移单元串联构成数字移相器。Preferably, the digital phase shifter includes three double-pole double-throw switches SW1, SW2, SW3 and three sets of delay lines with phase differences of 30°, 60° and 90°, wherein one double-pole double-throw switch is connected in parallel A group of delay lines with phase difference are connected to form a phase shift unit, and each phase shift unit is connected in series to form a digital phase shifter.
优选地，所述移相器主体包括多模谐振器以及用于调节匹配与谐振模的调谐元件。Preferably, the phase shifter body includes a multimode resonator and a tuning element for adjusting matching and resonant modes.
优选地，所述调谐元件为与谐振器连接的可变电容或者可变电感。Preferably, the tuning element is a variable capacitor or a variable inductor connected to the resonator.
优选地，所述多模谐振器为实施在介质基板上的十字形微带多模谐振器。Preferably, the multimode resonator is a cross-shaped microstrip multimode resonator implemented on a dielectric substrate.
优选地，所述十字形微带多模谐振器左右对称，横臂线宽W1＝1.3mm，纵臂线宽W2＝3mm，横臂线长L1＝5.95mm，上纵臂线长L2＝5.95mm，下纵臂线长L3＝2.17mm。Preferably, the cross-shaped microstrip multimode resonator is left-right symmetrical, the line width of the transverse arm W1 =1.3mm, the line width of the longitudinal arm W2 =3mm, the line length of the transverse arm L1 =5.95mm, and the line length of the upper longitudinal arm L2 =5.95mm, and the lower longitudinal arm line length L3 =2.17mm.
本发明与现有技术相比，其显著优点为：Compared with the prior art, the present invention has the following significant advantages:
1.基于多模谐振器设计的连续可调移相器，所实现的移相器具有匹配好回损低、分辨率高、相位斜率可控制、带宽可设计等优点；1. The continuously adjustable phase shifter designed based on the multi-mode resonator has the advantages of good matching, low return loss, high resolution, controllable phase slope, and designable bandwidth;
2.所提出的基于多模谐振器的移相器，能通过调整多模谐振器的匹配与谐振模来控制相位和相位斜率，实现具有指定功能的调相，包括但不限于具有恒定相位差的连续相位调节调相、实时延迟的连续调相(true-time-delay phase shifter)；2. The proposed multimode resonator-based phase shifter can control the phase and phase slope by adjusting the matching and resonant modes of the multimode resonator to achieve phase modulation with specified functions, including but not limited to having a constant phase difference The continuous phase adjustment of the phase shifter, the real-time delay of the continuous phase shifter (true-time-delay phase shifter);
3.所提出的基于多模谐振器的连续可调移相器可与常规数字移相器串联，实现具有相位扩展的宽带连续可调移相器，包括但不限于恒定相位差调相或实时延迟调相；3. The proposed multimode resonator-based continuously adjustable phase shifter can be connected in series with conventional digital phase shifters to realize broadband continuously adjustable phase shifters with phase expansion, including but not limited to constant phase difference phase modulation or real-time delayed phase modulation;
4.所提出的具有相位扩展的宽带连续可调移相器中，连续可调移相器与数字移相器均可采用宽带结构，实现宽带大范围高分辨率连续可调移相器，具有带宽宽、回损低、相位误差小、线性度好、分辨率高、相位调节范围大等显著优点。4. In the proposed broadband continuously adjustable phase shifter with phase extension, both the continuously adjustable phase shifter and the digital phase shifter can adopt a broadband structure to realize a broadband, large-scale and high-resolution continuously adjustable phase shifter with It has significant advantages such as wide bandwidth, low return loss, small phase error, good linearity, high resolution, and large phase adjustment range.
下面结合附图对本发明做进一步详细的描述。The present invention will be described in further detail below with reference to the accompanying drawings.
附图说明Description of drawings
图1是基于多模谐振器的连续可调移相器原理示意图。Figure 1 is a schematic diagram of the principle of a continuously adjustable phase shifter based on a multimode resonator.
图2是本发明实施例1的基于多模谐振器的连续可调移相器结构示意图。FIG. 2 is a schematic structural diagram of a continuously adjustable phase shifter based on a multi-mode resonator according to
图3是本发明实施例1中基于多模谐振器的连续可调移相器的幅度相位响应图。FIG. 3 is an amplitude-phase response diagram of a continuously adjustable phase shifter based on a multi-mode resonator in
图4是本发明实施例1中基于多模谐振器的具有恒定相位差的连续可调移相器的幅度相位响应图。FIG. 4 is an amplitude-phase response diagram of a continuously adjustable phase shifter with a constant phase difference based on a multi-mode resonator in
图5是本发明实施例2相位扩展的宽带连续可调移相器的结构示意图。FIG. 5 is a schematic structural diagram of a broadband continuously adjustable phase shifter with phase extension according to Embodiment 2 of the present invention.
图6是本发明实施例2相位扩展的宽带连续可调移相器的相位连续可调的幅度相位响应图。FIG. 6 is a graph of the amplitude and phase response of the continuously adjustable phase of the broadband continuously adjustable phase shifter with phase extension according to Embodiment 2 of the present invention.
图7是本发明实施例2相位扩展的宽带连续可调移相器的具有恒定相位差的连续可调移相器的幅度相位响应图。FIG. 7 is an amplitude and phase response diagram of a continuously adjustable phase shifter with a constant phase difference of a broadband continuously adjustable phase shifter with phase extension according to Embodiment 2 of the present invention.
具体实施方式Detailed ways
下面结合附图及具体实施例对本发明做进一步详细说明。The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
如图1所示，一种基于多模谐振器的连续可调移相器，包括控制电路、匹配控制模块、谐振模控制模块和移相器主体；控制电路与匹配控制模块和谐振模控制模块相连，分别或同时给两个控制模块馈电；匹配控制模块和谐振模控制模块与所述的移相器主体的控制信号端口相连。As shown in Figure 1, a continuously adjustable phase shifter based on a multi-mode resonator includes a control circuit, a matching control module, a resonant mode control module and a phase shifter body; the control circuit, the matching control module and the resonant mode control module The two control modules are fed separately or simultaneously; the matching control module and the resonant mode control module are connected to the control signal port of the phase shifter main body.
控制电路，用于分别或同时对匹配控制模块、谐振模控制模块进行馈电；匹配控制模块，用于控制所述移相器主体的相位；谐振模控制模块用于控制所述移相器主体的谐振模。a control circuit for feeding the matching control module and the resonant mode control module separately or simultaneously; the matching control module for controlling the phase of the phase shifter main body; the resonant mode control module for controlling the phase shifter main body resonant mode.
所述移相器主体的谐振膜与匹配都可调，实现相位与相位斜率连续均可调。Both the resonant film and the matching of the phase shifter main body are adjustable, so that the phase and the phase slope are continuously adjustable.
如图2所示，进一步的实施例中，所述匹配控制模块2采用具有调相器件的匹配调相模块5；所述谐振模控制模块2包括谐振模调相模块6和谐振模调节相位斜率模块7。匹配调相模块5、谐振模调相模块6和谐振模调节相位斜率模块7与所述的移相器主体4的控制信号端口相连。As shown in FIG. 2 , in a further embodiment, the matching control module 2 adopts a matching
所述移相器主体4包括多模谐振器8和调谐元件9。所述多模谐振器8为拥有多个相互独立的谐振模式的谐振器；所述调谐元件9为可变电容或者可变电感。所述多模谐振器8的具体结构不受限制，可以为任意能实现所述功能的电路结构。The phase shifter body 4 includes a
本发明通过调节移相器主体的相位和相位斜率，提供连续变化的相位，具体为：所述控制电路1发出控制信号分别或同时控制匹配调相模块5，谐振模调相模块6和谐振模调节相位斜率模块7；所述匹配调相模块5用于控制移相器主体的匹配，从而进行相位调节；所述谐振模调相模块6，用于控制移相器主体的谐振模进行相位调节；所述谐振模调节相位斜率模块7，用于控制移相器主体的谐振模进行相位斜率调节。The present invention provides a continuously changing phase by adjusting the phase and phase slope of the main body of the phase shifter. Specifically, the
本发明的相位调节遵从匹配调相模块5粗调，谐振模调相模块6细调的规律，可以实现连续相位调节。本发明可以同时进行相位调节与相位斜率的调节，实现具有指定功能的调相，包括但不限于具有恒定相位差的连续调相、实时延迟的连续调相(true-time-delay phase shifter)。The phase adjustment of the present invention follows the law of coarse adjustment of the matching
本发明中连续可调移相器可与常规数字移相器连接，实现具有大相位范围的连续调相、恒定相位差调相或实时延迟调相；其中多模移相器、调谐元件与数字移相器的具体结构不受限制，可以为任意能实现所述功能的电路结构。The continuously adjustable phase shifter in the present invention can be connected with a conventional digital phase shifter to realize continuous phase modulation, constant phase difference phase modulation or real-time delay phase modulation with a large phase range; wherein the multi-mode phase shifter, the tuning element and the digital The specific structure of the phase shifter is not limited, and can be any circuit structure that can realize the functions.
本发明中连续可调移相器与数字移相器均可采用宽带结构，实现宽带大范围高分辨率连续可调移相器，所实现的移相器具有带宽宽、回损低、相位误差小、线性度好、分辨率高、相位调节范围大等显著优点。In the present invention, both the continuously adjustable phase shifter and the digital phase shifter can adopt a broadband structure, so as to realize a wide-band, large-scale and high-resolution continuously adjustable phase shifter, and the realized phase shifter has the advantages of wide bandwidth, low return loss, and phase error. Small size, good linearity, high resolution, large phase adjustment range and other significant advantages.
实施例1Example 1
实施例1展示了一个可独立使用的基于多模谐振器的连续可调移相器，分别展示了其连续调相特性与恒定相位差调相特性，也可以实现天线系统中常用的实时延迟可调移相器(true-time-delay phase shifter)。Example 1 shows a continuously adjustable phase shifter based on a multimode resonator that can be used independently, showing its continuous phase modulation characteristics and constant phase difference phase modulation characteristics, and can also realize the real-time delay variable commonly used in antenna systems. true-time-delay phase shifter.
实施例1中的所有模块在相对介电常数为3.38，损耗角正切为0.0009，厚度为0.803mm的Rogers4003C介质板上实现。All modules in Example 1 are implemented on a Rogers 4003C dielectric board with a relative permittivity of 3.38, a loss tangent of 0.0009, and a thickness of 0.803 mm.
如图3所示，一种基于多模谐振器的连续可调移相器的结构示意图，移相器主体包括多模谐振器8和调谐元件9。调谐元件9由可变电容C10、C11、C2、C3组成；多模谐振器8为左右对称的十字形微带多模谐振器。横臂线宽为W1，纵臂线宽为W2，横臂线长为L1，上纵臂线长为L2，下纵臂线长为L3。As shown in FIG. 3 , a schematic structural diagram of a continuously adjustable phase shifter based on a multimode resonator, the phase shifter main body includes a
实现连续调相的步骤为：A.控制电路1给匹配调相模块5和谐振模调相模块6馈电，控制调谐元件9中的可变电容C10和C11，从而连续调节相位；B.控制电路1给谐振模调节相位斜率模块7馈电，从而微调可变电容C2和C3来改变谐振模的谐振频率，使本连续可调移相器拥有良好幅度特性；重复步骤A-B直至该连续可调移相器在幅度满足要求的情况下提供所需要的相位。The steps of realizing continuous phase modulation are: A. The
实现恒定相位差调相的步骤为：C.控制电路1给谐振模调节相位斜率模块7馈电，控制调谐元件9中的可变电容C2和C3来改变谐振模的谐振频率，提供所需要的相位斜率；D.为了兼顾幅度特性，控制电路1给匹配调相模块5和谐振模调相模块6馈电，从而微调可变电容C10和C11，使本连续可调移相器拥有良好幅度特性；重复步骤C-D直至该连续可调移相器在幅度与带宽满足要求的情况下实现目标相位并且各相位状态下的相位斜率保持不变。调节时该连续可调移相器的相位斜率需满足：
本实施例中，基于多模谐振器的连续可调移相器的中心频率设置为1.8GHz，十字形多模谐振器6的参数为W1＝1.3mm，W2＝3mm，L1＝5.95mm，L2＝5.95mm，L3＝2.17mm。通过控制电路1分别或同时控制带匹配调相模块5、谐振模调相模块6和谐振模调节相位斜率模块7来改变调谐元件9中的电容，从而使连续可调移相器在幅度满足要求的情况下相位连续变化，实现连续移相器的功能。初始状态时，调谐元件9中的电容值为C10＝3.24pF，C11＝2.87pF，C2＝14.44pF，C3＝7.72pF。In this embodiment, the center frequency of the continuously adjustable phase shifter based on the multi-mode resonator is set to 1.8GHz, and the parameters of the cross-shaped
结合图3与图4，验证连续可调移相器的连续相位调节与恒定相位差的连续调相功能。示例性的，以5°为间隔给出0°-30°的连续调相与具有恒定相位差的连续调相时的幅度与相位曲线。连续调相时，3dB带宽为58％，带内移相误差最大为30°±12.5°；恒定相位差的连续调相时，3dB带宽为56.55％，带内移相误差最大为30°±2.8°。Combined with Figure 3 and Figure 4, the continuous phase adjustment of the continuously adjustable phase shifter and the continuous phase modulation function of the constant phase difference are verified. Exemplarily, the amplitude and phase curves of 0°-30° continuous phase modulation and continuous phase modulation with a constant phase difference are given at intervals of 5°. In the case of continuous phase modulation, the 3dB bandwidth is 58%, and the maximum in-band phase shift error is 30°±12.5°; in the case of continuous phase modulation with constant phase difference, the 3dB bandwidth is 56.55%, and the maximum in-band phase shift error is 30°±2.8 °.
实施例2Example 2
实施例2展示了一个相位扩展的宽带连续可调移相器，分别展示了其连续调相特性与恒定相位差调相特性。实施例2也可进一步设计出其他性能：一方面可以将连续可调移相器结合宽带巴伦，进一步设计出更大的相位调节范围；另一方面，也可以轻松地设计实现宽相位范围的实时延迟可调移相器(true-time-delay phase shifter)。Embodiment 2 shows a wide-band continuously adjustable phase shifter with phase extension, and shows its continuous phase modulation characteristic and constant phase difference phase modulation characteristic respectively. Embodiment 2 can also further design other properties: on the one hand, a continuously adjustable phase shifter can be combined with a broadband balun to further design a larger phase adjustment range; on the other hand, a wide phase range can also be easily designed. A true-time-delay phase shifter.
实施例2的相位扩展的宽带连续可调移相器中，将一个连续可调移相器与一个数字移相器串联，可扩展相位调节范围。其中，连续可调移相器与数字移相器均采用了宽带结构，拥有比一般连续可调移相器更宽的工作带宽。采用本发明提出的基于多模谐振器的连续可调移相器技术，所设计出的宽带可调移相器具有带宽宽、回损低、相位误差小、线性度好、分辨率高、相位调节范围大等显著优点。In the broadband continuously adjustable phase shifter with phase extension in the second embodiment, a continuously adjustable phase shifter is connected in series with a digital phase shifter, so that the phase adjustment range can be extended. Among them, both the continuously adjustable phase shifter and the digital phase shifter adopt a broadband structure, and have a wider working bandwidth than the general continuously adjustable phase shifter. Using the continuously adjustable phase shifter technology based on the multi-mode resonator proposed by the present invention, the designed broadband adjustable phase shifter has the advantages of wide bandwidth, low return loss, small phase error, good linearity, high resolution, and high phase Significant advantages such as large adjustment range.
实施例2的所有模块在相对介电常数为3.38，损耗角正切为0.0009，厚度为0.803mm的Rogers4003C的介质板上实现。All modules of Example 2 were implemented on a Rogers 4003C dielectric board with a relative dielectric constant of 3.38, a loss tangent of 0.0009, and a thickness of 0.803 mm.
如图5所示，本实施例将实施例1中的连续可调移相器的射频端与数字移相器9的射频端口相连。数字移相器9由三个双刀双掷开关SW1,SW2,SW3和3组相位差分别为30°，60°和90°的延迟线组成。其中，一个双刀双掷开关并联连接一组有相位差的延迟线，组成一个相移单元，每个相移单元串联连接，构成数字移相器。每个开关有两种状态，于是数字移相器9有8种不同状态，7种不同的移相值，能够实现以30°为间隔的从0°到180°的数字移相。当数字移相器的相移为0°时，记为数字移相器的初始状态。带宽内，该数字移相器的最大移相值时的相位差为180°±41°。As shown in FIG. 5 , in this embodiment, the radio frequency end of the continuously adjustable phase shifter in
连续相位调节的步骤与实施例1中的步骤相同。连续恒定相位差相位调节的步骤与实施例1中的步骤相同，但调节时该宽带连续可调移相器的相位斜率保持恒定的条件变化为：The steps of continuous phase adjustment are the same as those in Example 1. The steps of continuous constant phase difference phase adjustment are the same as those in
式中，
如图6所示，为本实施例2的宽带连续可调移相器从0°到210°的连续相位曲线，以10°的间隔示例性地表示相位连续可调。本实施例中，相位扩展的宽带连续可调移相器在3dB带宽为42％的工作带宽内的最大相位差为210°±24°。As shown in FIG. 6 , the continuous phase curve from 0° to 210° of the broadband continuously adjustable phase shifter of the present embodiment 2 exemplarily indicates that the phase is continuously adjustable at intervals of 10°. In this embodiment, the maximum phase difference of the phase-expanded broadband continuously adjustable phase shifter within the working bandwidth of 42% of the 3dB bandwidth is 210°±24°.
结合图7，给出了相位扩展的宽带连续可调移相器的0°-210°具有恒定相位差的连续相位曲线。对比图7，该恒定相位差的宽带连续可调移相器在3dB带宽为41.3％的工作带宽内最大相位差为207°±10°，较好地实现了恒定相位差的连续移相，有效地减小了常规宽带移相器的带内移相误差。With reference to Fig. 7, the continuous phase curve of 0°-210° with constant phase difference of the phase-extended broadband continuously adjustable phase shifter is given. Compared with Fig. 7, the broadband continuously adjustable phase shifter with constant phase difference has a maximum phase difference of 207°±10° in the working bandwidth of 3dB bandwidth of 41.3%, which better realizes the continuous phase shift of constant phase difference, and effectively The in-band phase shift error of conventional wideband phase shifters is significantly reduced.
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