Dual frequency phase customizable phase shifter based on coupled resonator structure

Abstract

The application discloses a double-frequency phase customizable phase shifter based on a coupling resonator structure. The double-passband phase shifter comprises a double-mode resonant module at an input position, low-frequency and high-frequency-45° / 0° / 45° phase control modules arranged side by side in the middle of a circuit, and a double-frequency independent 0° / 180° phase control module at an output position. The three modules interact through coupling gaps, and are reasonably arranged and combined according to expected phases. The input signal amplitude of a specified frequency band can be modulated, and two groups of double-frequency phases independent of each other and not changing with frequency can be realized in the specified two frequency bands. The double-frequency phase shifter realized by the application can realize double-frequency independent designable phase characteristics, that is, the phase shift performance of two frequency bands is independent of each other, the phase shift value can be specified for design, and the frequencies of the two frequency bands can be flexibly designed.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of phase shifters, and in particular to a dual-frequency phase customizable phase shifter based on a coupled resonator structure. BACKGROUND

[0002] Current wireless systems are rapidly developing in the direction of multi-function, miniaturization, high frequency, multi-user or multi-target, etc. In the field of wireless communication, with the explosive growth of mobile communication users and data volume, multi-beam phased arrays that can simultaneously generate multiple independent beams can greatly improve communication efficiency and are one of the key technologies of the new generation of communication systems. At the same time, dual-frequency and multi-frequency technologies can effectively increase the working mode and information volume of the system, and have always been an important research direction of wireless systems. By combining dual-frequency technology and multi-beam phased array technology, research on dual-frequency co-aperture multi-beam phased arrays is carried out, and both frequency and spatial dimensions are fully utilized to achieve function and performance improvement, which is expected to promote the leap-forward development of multi-beam systems.

[0003] Phase shifters are a key component of phased array antennas and directly determine the function and performance of phased arrays. Regardless of the beam control method, the core is phase control. Traditional low-loss passive phase shift methods include switch switching method, loaded capacitance method, and reflected load method, and there are difficulties in realizing dual-frequency independent phase control. Currently, there are few published works on a circuit structure that realizes dual-frequency independent phase shift function. There are even fewer studies on further dual-frequency independent frequency and phase control and 360° phase realization.

[0004] In summary, dual-frequency independent phase characteristics, i.e., a dual-frequency phase shifter whose phase shift performance of two frequency bands is independent of each other and whose phase shift value can be specified for design, still need to be researched. SUMMARY

[0005] The application aims to provide a dual-frequency phase customizable phase shifter based on a coupled resonator structure to solve the problems of existing dual-frequency phase shifters, such as incomplete independence of dual-passband performance, limited phase design, and inflexible frequency design.

[0006] The technical solution for achieving the application is a dual-frequency phase customizable phase shifter based on a coupled resonator structure, which includes a dual-frequency phase shifter structure and can achieve the following: for input signals of two specified frequency bands, the amplitude can pass through and the phase can be modulated, and two groups of dual-frequency independent phase distributions that do not change with frequency are realized in the specified two frequency bands.

[0007] Further, the dual-frequency phase shifter structure comprises, in sequence, an input dual-mode resonant module at an input position, a low-frequency -45° / 0° / 45° phase control module and a high-frequency -45° / 0° / 45° phase control module arranged side by side and oppositely, and a dual-frequency independent 0° / 180° phase control module at an output position; the modules interact through coupling gaps to realize the function of amplitude passing at dual frequencies and phase being configured according to expected values.

[0008] The input dual-mode resonant module is a resonator with two resonant modes, and the resonant frequencies of the two resonant modes of mode one and mode two generated are respectively corresponding to low-frequency and high-frequency operating frequencies, to realize the band-pass characteristic under dual frequencies.

[0009] The low-frequency -45° / 0° / 45° phase control module is used for generating -45° / 0° / 45° phase shifts in a low-pass band.

[0010] The high-frequency -45° / 0° / 45° phase control module is used for generating -45° / 0° / 45° phase shifts in a high-pass band.

[0011] The dual-frequency independent 0° / 180° phase control module utilizes voltage distributions under the two resonant modes to control 0° / 180° phases at the two frequencies by controlling feeding positions on the basis of the input dual-mode resonant module.

[0012] Further, the low-frequency -45° / 0° / 45° phase control module comprises a U-shaped single-frequency resonator 1 and an open-circuit configurable branch 1 loaded in the middle of the U-shaped single-frequency resonator 1 and designed according to an expected phase.

[0013] Further, the high-frequency -45° / 0° / 45° phase control module comprises a U-shaped single-frequency resonator 2 and an open-circuit configurable branch 2 loaded in the middle of the U-shaped single-frequency resonator 2 and designed according to an expected phase.

[0014] Further, the input dual-mode resonant module is an open-circuit branch loaded step impedance resonator, which generates two resonant modes of mode one and mode two by designing impedance values and electrical lengths.

[0015] Further, the design of the dual-frequency independent 0° / 180° phase control module is that, on the basis of the input dual-mode resonant module, voltage distributions under the two resonant modes are utilized to control 0° / 180° phases at the two frequencies by controlling feeding positions of signal output ports.

[0016] Further, the selectable feeding positions of the signal output ports comprise:

[0017] Position 1: the voltage distributions of mode one and mode two are both positive;

[0018] Position 2: the output voltage of mode one is positive, and the voltage distribution of mode two is negative;

[0019] Position 3: the voltage distribution of mode one and mode two are both negative;

[0020] Position 4: the output voltage of mode one is negative, and the output voltage of mode two is positive.

[0021] Further, when the feeding position of the signal output port is the position 1, the reference phase is set to low frequency 0° and high frequency 0°; when the signal output port moves from the position 1 to the position 2, the output voltage direction of mode one is unchanged, and the output voltage direction of mode two is opposite to that of the voltage fed out in the position 1, realizing low frequency 0° and high frequency 180° phase; when the signal output port moves from the position 1 to the position 3, the output voltage directions of mode one and mode two are both opposite to that of the voltage fed out in the position 1, realizing low frequency 180° and high frequency 180° phase; when the signal output port moves from the position 1 to the position 4, the output voltage direction of mode one is opposite to that of the voltage fed out in the position 1, and the output voltage direction of mode two is unchanged, realizing low frequency 180° and high frequency 0° phase.

[0022] Further, the low frequency-45° / 0° / 45° phase control module or the high frequency-45° / 0° / 45° phase control module is a branch-loaded half-wave resonator that can be freely designed under single mode / dual mode of single frequency, and specifically comprises:

[0023] When there is no branch loading, the U-shaped single-frequency resonator is a half-wave resonator, and only one resonant mode exists, and the resonant frequency is adjusted by adjusting the electrical length of the U-shaped single-frequency resonator, and the phase value is set to reference 0°;

[0024] When there is branch loading, the U-shaped single-frequency resonator has two resonant modes of the same frequency band, and the phase value is controlled to-45° / 45° by the length of the configurable branch;

[0025] The working frequencies of the low frequency-45° / 0° / 45° phase control module and the high frequency-45° / 0° / 45° phase control module are close to the working frequencies of mode one and mode two of the input dual-mode resonant module, so as to realize the band-pass characteristic.

[0026] Compared with the prior art, the present application has the following advantages: the present application can realize the phase characteristic of dual-frequency independent design, that is, the phase shift performance of two frequency bands is independent of each other, the phase shift value can be specified for design, and the frequencies of the two frequency bands can be flexibly designed.

[0027] The present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural diagram of a dual-band phase customizable phase shifter based on a coupled resonator structure according to the present application.

[0029] Figure 2 is an amplitude-phase response diagram of a -45° / 0° / 45° phase control module according to the present application in an embodiment, which realizes -45° / 0° / 45° phase shift. Figure 2 in (a) is an amplitude response diagram of the -45° / 0° / 45° phase control module, Figure 2 in (b) is a phase response diagram of the -45° / 0° / 45° phase control module.

[0030] Figure 3 is a voltage distribution diagram of four feeding positions and modes one and two of an output port of a dual-band independent 0° / 180° phase control module according to the present application in an embodiment.

[0031] Figure 4 is a phase response diagram of two frequency bands of 0° / 180° phase shift realized by four feeding positions of an output port of a dual-band independent 0° / 180° phase control module according to the present application in an embodiment.

[0032] Figure 5 is a structure and design process diagram of a dual-band phase customizable phase shifter according to the present application in an embodiment, which realizes low-pass output quantized phases of 0°, -60°, -120° and -180°, and high-pass output quantized phases of -330°, -220°, -110° and 0°.

[0033] Figure 6 is an amplitude response simulation result diagram of a dual-band phase customizable phase shifter based on a coupled resonator structure according to the present application in an embodiment.

[0034] Figure 7 is a phase response simulation result diagram of a dual-band phase customizable phase shifter based on a coupled resonator structure according to the present application in an embodiment, Figure 7 in (a) is a phase response simulation result diagram of a low-pass band of the phase shifter, Figure 7 in (b) is a phase response simulation result diagram of a high-pass band of the phase shifter. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0036] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, motion condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directional indications will also change accordingly.

[0037] In one embodiment, the present application provides a dual-frequency phase customizable phase shifter based on a coupled resonator structure, including a dual-frequency phase shifter structure, which can achieve: for input signals of two specified frequency bands, the amplitude can pass through, and the phase can be modulated, and two groups of dual-frequency independent phase distributions that do not change with frequency are realized in the specified two frequency bands.

[0038] Further, in one of the embodiments, in combination with Figure 1 The dual-frequency phase shifter structure includes, in sequence: an input dual-mode resonant module at an input position, a low-frequency -45° / 0° / 45° phase control module and a high-frequency -45° / 0° / 45° phase control module arranged side by side and opposite to each other, and a dual-frequency independent 0° / 180° phase control module at an output position; each module interacts through a coupling gap to realize the function of passing through the amplitude and configuring the phase according to the expected value at the dual frequency.

[0039] The input dual-mode resonant module is a resonator with two resonant modes, and the resonant frequencies of the two resonant modes generated by mode one and mode two correspond to the low-frequency and high-frequency operating frequencies, respectively, to realize the bandpass characteristic at the dual frequency.

[0040] The low-frequency -45° / 0° / 45° phase control module is used to generate -45° / 0° / 45° phase shift in the low-pass band.

[0041] The high-frequency -45° / 0° / 45° phase control module is used to generate -45° / 0° / 45° phase shift in the high-pass band.

[0042] The dual-frequency independent 0° / 180° phase control module uses the voltage distribution under the two resonant modes to control the 0° / 180° phase at the two frequencies by controlling the feed position on the basis of the input dual-mode resonant module.

[0043] Here, in some embodiments, the low-frequency -45° / 0° / 45° phase control module includes a U-shaped single-frequency resonator 1 and an open-circuit configurable stub 1 loaded in the middle of the U-shaped single-frequency resonator 1 according to the expected phase design.

[0044] Here, in some embodiments, the high-frequency -45° / 0° / 45° phase control module includes a U-shaped single-frequency resonator 2 and an open-circuit configurable stub 2 loaded in the middle of the U-shaped single-frequency resonator 2, designed according to the desired phase.

[0045] Here, in some embodiments, the input dual-mode resonant module is an open-stub loaded step impedance resonator, which generates two resonant modes, mode one and mode two, by designing the impedance value and electrical length.

[0046] Furthermore, in one embodiment, the dual-frequency independent 0° / 180° phase control module is designed as follows: based on the input dual-mode resonant module, the 0° / 180° phase at two frequencies is controlled by controlling the feed position of the signal output port using the voltage distribution in the two resonant modes. The output dual-frequency independent 0° / 180° phase control module should have the same resonant frequency as the input dual-mode resonant module, that is, the voltage distribution of the two modules in modes one and mode two should be consistent to achieve bandpass characteristics.

[0047] Preferably, in some embodiments, the selectable power supply location for the signal output port includes:

[0048] Location 1: The voltage distribution in both Mode 1 and Mode 2 is positive;

[0049] Position 2: The output voltage of Mode 1 is positive, and the voltage distribution of Mode 2 is negative;

[0050] Location 3: The voltage distribution in both Mode 1 and Mode 2 is negative;

[0051] Position 4: The output voltage of Mode 1 is negative, and the output voltage of Mode 2 is positive.

[0052] like Figure 3 The diagram shows four power supply positions and voltage distribution diagrams for Mode 1 and Mode 2 of the output port of the dual-frequency independent 0° / 180° phase control module of this invention. The voltages supplied from power supply positions 1, 2, 3, and 4 correspond to points A, B, C, and D respectively in the Mode 1 voltage distribution of the dual-mode resonator, and to points E, F, G, and H respectively in the Mode 2 voltage distribution. Specifically, the voltage directions at A and D are opposite, as are those at B and C, E and F, and G and H. The voltage directions at E and H are the same, and the voltage directions at F and G are the same.

[0053] When the output port is the feeding position 1, the reference phase is set to low frequency 0° and high frequency 0°. Therefore, when the feeding position of the output port changes from 1 to 2, the voltage directions of the two positions are the same in mode one and opposite in mode two, so that the phase response of the output remains unchanged in the low pass band corresponding to mode one and shows a 180° phase shift characteristic in the high pass band corresponding to mode two. When the feeding position of the output port changes from 1 to 3, the voltage directions of the two positions are opposite to the voltage direction corresponding to the position 1 in mode one and mode two, so that the phase response of the output shows a 180° phase shift characteristic in the two pass bands corresponding to mode one and mode two. When the feeding position of the output port changes from 1 to 4, the voltage directions of the two positions are opposite in mode one and the same in mode two, so that the phase response of the output shows a 180° phase shift characteristic in the low pass band corresponding to mode one and remains unchanged in the high pass band corresponding to mode two. In summary, by changing the feeding position of the output port, the dual-frequency phase shifter can realize four different phase shift states of 0°, 0°; 0°, 180°; 180°, 180°; 180°, 0° in two pass bands, and realize independent 0° / 180° phase control of dual frequencies.

[0054] As shown in Figure 4 Fig. 4 shows the phase response diagram of the output dual-frequency 0° / 180° phase control module of the application, which realizes 180° phase shift in two frequency bands through four feeding positions of the output port. The phase response of the phase shifter with the feeding position of the output port as position 1 is taken as the reference phase, that is, the phases of the two frequency bands are 0° and 0°. The phase shifter with the feeding position of the output port as position 2 realizes 0° and 180° phase shifts in the low pass band and the high pass band, respectively. The phase shifter with the feeding position of the output port as position 3 realizes 180° and 180° phase shifts in the low pass band and the high pass band, respectively. The phase shifter with the feeding position of the output port as position 4 realizes 180° and 0° phase shifts in the low pass band and the high pass band, respectively.

[0055] Further, in one embodiment, the low-frequency -45° / 0° / 45° phase control module or the high-frequency -45° / 0° / 45° phase control module, wherein the U-shaped single-frequency resonator 1 and the U-shaped single-frequency resonator 2 cooperate with the loading branch to form a branch-loaded half-wave resonator with a freely designed single mode / dual mode in a single frequency, and specifically comprises:

[0056] Without branch loading, the U-shaped single-frequency resonator is a half-wave resonator, which has only one resonant mode. The resonant frequency is adjusted by adjusting the electrical length of the U-shaped single-frequency resonator, and the phase value is set to the reference 0°.

[0057] With branch loading, the U-shaped single-frequency resonator has two resonant modes in the same frequency band, and the phase value is controlled to be -45° / 45° by adjusting the length of the configurable branch.

[0058] The working frequencies of the low-frequency -45° / 0° / 45° phase control module and the high-frequency -45° / 0° / 45° phase control module are close to the working frequencies of the mode one and the mode two of the input dual-mode resonant module, so as to realize the band-pass characteristic.

[0059] As shown in FIG. 1, the amplitude-phase response diagram of the -45° / 0° / 45° phase control module for realizing -45° / 0° / 45° phase shift is given by taking the low-pass band as an example. Figure 2 As shown in FIG. 2(a), when the low-frequency -45° / 0° / 45° phase control module is not loaded with a stub, the single-frequency resonator has only one resonant mode, and the phase value is set to the reference 0°; when the low-frequency -45° / 0° / 45° phase control module is loaded with a stub, the single-frequency resonator has two resonant modes in the low-frequency band; in particular, when the stub is loaded as a short stub, a right zero point is generated on the right side of the passband, and when the stub is loaded as a long stub, a left zero point is generated on the left side of the passband. Figure 2 As shown in FIG. 2(b), the phase response of the low-frequency -45° / 0° / 45° phase control module loaded with a short stub will have a downward phase jump at the right zero point, so as to realize -45° phase shift in the passband compared with the phase response without loading the stub; the phase response of the low-frequency -45° / 0° / 45° phase control module loaded with a long stub will have an upward phase jump at the left zero point, so as to realize 45° phase shift in the passband compared with the phase response without loading the stub. Figure 2

[0060] It should be noted that the above input dual-mode resonant module, low-frequency -45° / 0° / 45° phase control module, high-frequency -45° / 0° / 45° phase control module, and output dual-frequency 0° / 180° phase control module are independent of each other, and through the combination design of the modules and the appropriate frequency offset of the passbands, the independent and customizable phase of the dual-frequency phase shifter of the present application can be realized.

[0061] As a specific example, in one of the embodiments, the present application is further verified and described.

[0062] The four dual-frequency phase shifters in the embodiment are realized on a Rogers 4003C dielectric plate with a relative dielectric constant of 3.55, a loss tangent of 0.0027, and a thickness of 0.813 mm.

[0063] As shown in FIG. 3, the amplitude-phase response diagram of the -45° / 0° / 45° phase control module for realizing -45° / 0° / 45° phase shift is given by taking the low-pass band as an example. Figure 5 ​As shown, the design of the embodiment realizes differential phase shift -60° (low frequency) and 110° (high frequency), i.e. the design of low pass band custom phase shift value -60° and high pass band custom phase shift value 110° between adjacent phase shifters. First, the target phases of phase shifter 1, phase shifter 2, phase shifter 3 and phase shifter 4 meeting the design requirements of low pass band -60° and high pass band 110° are determined: the target phases of low frequency are 0°, -60°, -120° and -180° respectively; the target phases of high frequency are -330°, -220°, -110° and 0° respectively. Three steps are needed to realize the target phases of the embodiment:

[0064] Step one, determine the design scheme of 0° / 180° phase control module of each phase shifter output: the target phases of low frequency can be obtained by further designing 0°, 0°, -180° and -180°; the target phases of high frequency can be obtained by further designing -360°, -180°, -180° and 0°. In the phase shifter, the phase difference 360° can be equivalent to 0°, so the required low frequency phases can be equivalent to 0°, 0°, 180° and 180°; the required high frequency phases can be equivalent to 0°, 180°, 180° and 0°. Therefore, the phase values required by phase shifter 1 for two pass bands are 0° and 0°; the phase values required by phase shifter 2 for two pass bands are 0° and 180°; the phase values required by phase shifter 3 for two pass bands are 180° and 180°; the phase values required by phase shifter 4 for two pass bands are 180° and 0°. Because the phase values are relative, the feeding position of the output port of phase shifter 1 as a reference can be arbitrarily selected. In the embodiment, position 2 is selected as the feeding position of the output port of phase shifter 1. With phase shifter 1 as a reference, it can be determined that the output port of phase shifter 2 should be selected at position 1; the output port of phase shifter 3 should be selected at position 4; the output port of phase shifter 4 should be selected at position 3.

[0065] Step two, determine the phase shifter low frequency, high frequency-45° / 0° / 45° phase control module design scheme: compare the low frequency 0°, 0°, -180°, -180° phase achieved in step one with its target phase 0°, -60°, -120°, -180°, determine the design scheme of the low frequency-45° / 0° / 45° phase control module of each phase shifter as no stub loading without phase shift, loading short stub with-45° phase shift, loading long stub with 45° phase shift, no stub loading without phase shift; compare the high frequency-360°, -180°, -180°, 0° phase achieved in step one with its target phase-330°, -220°, -110°, 0° to determine the design scheme of the high frequency-45° / 0° / 45° phase control module of each phase shifter as loading long stub with 45° phase shift, loading short stub with-45° phase shift, loading long stub with 45° phase shift, no stub loading without phase shift. The determined scheme can achieve low pass band 0°, -45°, -135°, -180° phase, high pass band-315°, -225°, -135°, 0° phase.

[0066] Step three, determine the frequency shift scheme of each phase shifter in two pass bands: compare the low frequency 0°, -45°, -135°, -180° phase achieved in step two with its target phase 0°, -60°, -120°, -180° to determine that each phase shifter low pass band needs to be frequency shifted to achieve 0°, -15°, 15°, 0° phase shift value; compare the high frequency-315°, -225°, -135°, 0° phase achieved in step two with its target phase-330°, -220°, -110°, 0° to determine that each phase shifter high pass band needs to be frequency shifted to achieve-15°, 5°, 25°, 0° phase shift value.

[0067] It is known that the phase curve of a bandpass device is a quasi-linear straight line. By moving the center frequency of the bandpass curve, the phase curve will also move accordingly. That is, moving the center frequency to the left, the phase curve moves to the left, producing a negative phase difference, thereby achieving a small range of phase shift. According to the determined scheme, the low frequency phase 0°, -15°, 15°, 0° small range phase shift is achieved by adjusting the electrical length of the U-shaped single frequency resonator 1, and the high frequency phase-15°, 5°, 25°, 0° small range phase shift is achieved by adjusting the electrical length of the U-shaped single frequency resonator 2, finally achieving the low frequency 0°, -60°, -120°, -180°; high frequency-330°, -220°, -110°, 0° phase value. Figure 5 The structure diagram of step three is the final structure diagram of the present embodiment.

[0068] As Figure 6As shown, the amplitude response simulation results of a dual-frequency customizable phase shifter with low-passband output quantization phases of 0°, -60°, -120°, and -180°, and high-passband output quantization phases of -330°, -220°, -110°, and 0° are presented. It can be seen that the two operating frequencies of the dual-frequency phase shifter designed in this embodiment are 2.4GHz and 3.85GHz, and the relative bandwidths of the low-passband and high-passband are 5.4% and 5.7%, respectively.

[0069] like Figure 7 As shown, the simulation results of the phase response of the dual-frequency phase-customizable phase shifter implemented in this embodiment are given, with low-frequency output quantization phases of 0°, -60°, -120°, and -180°, and high-frequency output quantization phases of -330°, -220°, -110°, and 0°. It can be seen that the phase shift difference between adjacent phase shifters in each passband is flat, which meets the application requirements.

[0070] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A dual-frequency phase customizable phase shifter based on a coupled resonator structure, characterized by, The double-frequency phase shifter structure comprises, in sequence, an input double-mode resonant module at an input position, side-by-side and opposite low-frequency -45° / 0° / 45° phase control modules and high-frequency -45° / 0° / 45° phase control modules, and a double-frequency independent 0° / 180° phase control module at an output position. The double-frequency phase shifter structure comprises, in sequence, an input double-mode resonant module at an input position, side-by-side and opposite low-frequency -45° / 0° / 45° phase control modules and high-frequency -45° / 0° / 45° phase control modules, and a double-frequency independent 0° / 180° phase control module at an output position. Each module interacts through a coupling gap to achieve the function of amplitude passing and phase being configured according to an expected value at the double frequencies. The input double-mode resonant module is a resonator with two resonant modes, generating two resonant modes, mode one and mode two, with resonant frequencies corresponding to low-frequency and high-frequency operating frequencies, respectively, to achieve a band-pass characteristic at the double frequencies. The low-frequency -45° / 0° / 45° phase control module is configured to generate -45° / 0° / 45° phase shifts in a low-pass band. The high-frequency -45° / 0° / 45° phase control module is configured to generate -45° / 0° / 45° phase shifts in a high-pass band. The double-frequency independent 0° / 180° phase control module uses voltage distribution at the two resonant modes to control 0° / 180° phases at the two frequencies by controlling a feeding position on the basis of the input double-mode resonant module. The low-frequency -45° / 0° / 45° phase control module comprises a U-shaped single-frequency resonator 1 and an open-circuit configurable branch 1 loaded in the middle of the U-shaped single-frequency resonator 1 and designed according to an expected phase. The high-frequency -45° / 0° / 45° phase control module comprises a U-shaped single-frequency resonator 2 and an open-circuit configurable branch 2 loaded in the middle of the U-shaped single-frequency resonator 2 and designed according to an expected phase. The low-frequency -45° / 0° / 45° phase control module or the high-frequency -45° / 0° / 45° phase control module is a branch-loaded half-wavelength resonator with a single mode / double mode that can be freely designed at a single frequency, specifically comprising: Without branch loading, the U-shaped single-frequency resonator is a half-wavelength resonator with only one resonant mode, and the phase value is set to reference 0° by adjusting the electrical length of the U-shaped single-frequency resonator to adjust the resonant frequency. With branch loading, the U-shaped single-frequency resonator has two resonant modes at the same frequency band, and the phase value is -45° / 45° by controlling the length of the configurable branch. The operating frequencies of the low-frequency -45° / 0° / 45° phase control module and the high-frequency -45° / 0° / 45° phase control module are similar to the operating frequencies of mode one and mode two of the input double-mode resonant module, to achieve a band-pass characteristic.

2. The dual frequency phase customizable phase shifter based on a coupled resonator structure of claim 1, wherein, The input double-mode resonant module is an open-branch-loaded step impedance resonator that generates two resonant modes, mode one and mode two, by designing impedance values and electrical lengths.

3. The dual frequency phase customizable phase shifter based on a coupled resonator structure of claim 2, wherein, The design of the double-frequency independent 0° / 180° phase control module is that, on the basis of the input double-mode resonance module, the voltage distribution under two resonance modes is utilized to control the 0° / 180° phase at two frequencies by controlling the feeding position of the signal output port.

4. The dual frequency phase customizable phase shifter based on a coupled resonator structure of claim 3, wherein, The selectable feeding position of the signal output port includes: Position 1: the voltage distribution of mode one and mode two is positive; Position 2: the output voltage of mode one is positive, and the voltage distribution of mode two is negative; Position 3: the voltage distribution of mode one and mode two is negative; Position 4: the output voltage of mode one is negative, and the output voltage of mode two is positive.

5. The dual frequency phase customizable phase shifter based on a coupled resonator structure of claim 4, wherein, When the feeding position of the signal output port is the position 1, the reference phase is set to low-frequency 0° and high-frequency 0°; when the signal output port is moved from the position 1 to the position 2, the output voltage direction of mode one is unchanged, and the output voltage direction of mode two is opposite to that of the voltage fed out from the position 1, thereby realizing the phase of low-frequency 0° and high-frequency 180°; when the signal output port is moved from the position 1 to the position 3, the output voltage direction of mode one and mode two is opposite to that of the voltage fed out from the position 1, thereby realizing the phase of low-frequency 180° and high-frequency 180°; when the signal output port is moved from the position 1 to the position 4, the output voltage direction of mode one is opposite to that of the voltage fed out from the position 1, and the output voltage direction of mode two is unchanged, thereby realizing the phase of low-frequency 180° and high-frequency 0°.

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