A reflective chip with continuously adjustable amplitude and phase

Abstract

The invention discloses a reflection-type amplitude-phase continuously adjustable chip, belonging to the field of chip technology, comprising a reflection-type phase-continuously adjustable phase shifter and an attenuator connected thereto with continuously adjustable attenuation, wherein the phase shifter comprises a power supply circuit, a phase shift matching circuit and a radio frequency tube, two power supply interfaces are respectively connected to the two ends of the interstage DC capacitor on the radio frequency main circuit through respective filter capacitors and effusion inductors, and then the gates of the two radio frequency tubes are directly controlled through different matching inductors, the drain and source of the radio frequency tube are short-circuited and connected, and are directly grounded through the matching inductors; the chip utilizes the characteristic that the parasitic Miller capacitance of the radio frequency tube changes continuously with the gate voltage to realize continuous impedance change, and then realizes 360-degree phase change by changing the control voltage, designs a continuously adjustable phase shifter, selects a suitable phase according to the voltage change, and realizes free phase selection; at the same time, an attenuation circuit is introduced to realize continuous amplitude adjustment, and then realize amplitude balance control.

Description

Technical Field

[0001] The invention relates to the technical field of chips, and in particular to a reflective chip with continuously adjustable amplitude and phase. Background Art

[0002] Active phased array radar has the advantages of low latency, high precision, strong detection and wide coverage in communication and detection, and has been widely used in military detection and civilian communications. Amplitude and phase control is a key technology for realizing phased array radar, especially phase control, which is an important technology for phased array radar to change the beam direction. By changing the phase, the beam direction of the phased array radar and the energy on the beam direction are changed to achieve beam scanning and beam forming.

[0003] At present, phased array radars are composed of multiple groups of transceiver units to form antenna arrays. Each antenna array involves multiple TR modules. Therefore, a phased array radar will involve tens of thousands of phase shifters, or even hundreds of thousands of phase shifters. Traditional CNC phase shifter chips use multiple phase shift control units to achieve 360° phase shift in steps of 5.625°. They have the disadvantages of many control ports, large area, and discontinuity. In the prior art, patent CN114883763A discloses a compact adjustable differential phase shifter based on capacitively loaded coupled dual lines. The phase shifter is a two-end phase shifter that requires a receiving antenna unit and a transmitting antenna unit. The array adjustment is relatively complicated.

[0004] Compared with the double-ended phase shifter, the single-ended reflective phase shifter has only one port (shared input and output), and the receiving and transmitting share one antenna unit, with independent channels and convenient shaping. The traditional single-ended reflective phase shifter achieves phase shifting by changing the parasitic capacitance of two varactor diodes. However, discrete varactor devices have the disadvantages of large area, low precision, large phase shift insertion loss, and amplitude imbalance, which indirectly affect the performance indicators of phased array radar such as high precision, strong detection, and miniaturization. At the same time, discrete varactor diodes are difficult to integrate with active chips into one chip to achieve continuous control of amplitude and phase.

[0005] RF tubes are the main components in the design of power amplifiers, low-noise amplifiers, driver amplifiers, and voltage-controlled attenuators. They rely on RF tube gain to amplify signals. RF tube parasitic Miller capacitance has always been a capacitor that has been abandoned by amplifier design and is an unfavorable factor in RF chip design. The existence of Miller capacitance often brings the following disadvantages: 1. When the signal is amplified by the RF tube, there will be another path, which is not conducive to amplifier design; 2. Potential parasitic conduction risk, which may cause the device to turn on unexpectedly during signal modulation; 3. Miller oscillation, affecting the stability and performance of RF tubes or switch tubes; 4. Increased losses, delayed switching time, and reduced process cutoff frequency (not conducive to high-frequency design). Therefore, in the design of amplifiers, RF tubes have always considered how to eliminate the influence of Miller capacitance.

[0006] In view of the shortcomings of the above two-terminal phase shifters and traditional reflective phase shifters, this scheme uses the characteristic that the Miller capacitance changes continuously with the gate voltage to design a reflective continuous phase shifter. By introducing the parasitic Miller capacitance of the RF tube that changes with voltage to replace the ordinary device-type varactor diode, a miniaturized, high-precision, easy-to-integrate active control amplitude phase shifter is designed to improve the performance of phased array radar. Summary of the invention

[0007] The present invention aims to solve the problems of large volume, discontinuity, low precision and the like of the phase shifter in the prior art, and proposes a reflective chip with high precision, high reliability, miniaturization and continuously adjustable amplitude and phase.

[0008] In order to achieve the above-mentioned object of the invention, the technical solution of the present invention is as follows: A reflective amplitude and phase continuously adjustable chip comprises a reflective phase continuously adjustable phase shifter and an attenuator connected thereto with continuously adjustable attenuation, wherein the phase shifter comprises a power supply circuit, a phase shift matching circuit and a radio frequency tube; the power supply circuit comprises two power supply control interfaces, the two power supply control interfaces are respectively connected to the two ends of the interstage DC capacitor on the radio frequency main circuit through their own filter capacitors and rectifier inductors, and then directly control the grids of the two radio frequency tubes through different matching inductors, the drain and source of the radio frequency tube are short-circuited and connected, and then directly grounded through matching inductors; the radio frequency tube is equivalent to a variable capacitor, and the continuous change of the adjusting voltage realizes the continuous change of the input impedance.

[0009] Furthermore, the phase shifter includes a radio frequency DC blocking capacitor C3, one end of the radio frequency DC blocking capacitor C3 serves as both a radio frequency input end and a radio frequency output end, and the input and output ends are shared to form a single-ended reflection phase shifter.

[0010] Further, the phase shifter includes control power supply circuit filter capacitors C1 and C2, stage DC isolation capacitor C4 which is both a DC isolation capacitor and participates in phase adjustment function, RF galvanostatic inductors L1 and L2, inductors L3~L8 participating in frequency band matching and phase within the frequency band, and RF tubes CPW1 and CPW2 providing continuously variable Miller capacitance for the entire circuit; the other end of the RF DC isolation capacitor C3 is connected to L3, the other end of L3 is connected to C4, L1, and L5, the other end of L1 is connected to C1 and the power supply terminal VC1, the other end of C1 is grounded, the other end of L5 is connected to the gate of CPW1, the source and drain of CPW1 are connected and then connected to L7, the other end of L7 is grounded, the other end of C4 is connected to L4, the other end of L4 is connected to L2 and L6, the other end of L2 is connected to C2 and the power supply VC2, the other end of C2 is grounded, the other end of L6 is connected to the gate of CPW2, the source and drain of CPW2 are connected and then connected to L8, and the other end of L8 is grounded.

[0011] Furthermore, the input end of the attenuator is a radio frequency input end, and the output end thereof is connected to the input end of a reflective continuously phase adjustable phase shifter, thereby forming an amplitude continuously phase adjustable reflective chip in which both the amplitude and the phase can be continuously changed.

[0012] Furthermore, the attenuator includes a power supply circuit, an amplitude adjustment circuit, and an amplitude modulation matching circuit. The power supply circuit includes a filter capacitor and an inductor; the amplitude adjustment circuit includes a radio frequency tube, a resistor, and an inductor connected in series on the radio frequency path; and the amplitude modulation matching circuit includes an inductor and a capacitor.

[0013] Furthermore, the power supply circuit includes two control voltages, one of which is a constant supply voltage, which is divided by a voltage-dividing resistor inside the chip and connected in series to the source and drain of the RF tube on the RF attenuation main circuit through an isolation resistor; the other control voltage is divided by a voltage-dividing resistor, connected to the gate of the RF tube in parallel on the RF attenuation main circuit through an isolation resistor, and is also connected to the gate of the RF tube in series on the RF attenuation main circuit through an isolation resistor, and simultaneously controls the gate voltage of the RF tubes in parallel and in series on the RF attenuation main circuit; continuous attenuation is achieved by continuously changing the attenuation of the RF main circuit with the voltage, and then selecting the control voltage according to the attenuation, thereby achieving free-style attenuation selection.

[0014] Furthermore, the attenuator includes RF DC blocking capacitors C5~C8, RF tubes CPW3~CPW6, inductors L9~L12, high-resistance resistors R5~R14 for isolating RF signals, low-value resistors R15 and R16 for being connected in parallel with the parasitic resistances of the RF tubes CPW3 and CPW4, and voltage-dividing resistors R1~R4 for providing a low voltage to the RF tubes CPW3 and CPW4 after dividing the control voltage.

[0015] Furthermore, one end of the DC blocking capacitor C5 is the attenuator input end, and the other end is connected to the CPW3 source and L9 and R5. The other end of L9 is connected to R15, the other end of R15 is connected to L10, the other end of L10 is connected to the drain of CPW3, and the gate of CPW3 is connected to R8; the CPW3 drain is connected to R6, C6, the CPW4 source, and L11, the other end of L11 is connected to R16, the other end of R16 is connected to L12, the other end of L12 is connected to the CPW4 drain, R7, and C8, and the other end of C8 is the attenuator RF output end.

[0016] Further, the gate of CPW4 is connected to R9, the other end of C6 is connected to the source of CPW5 R10, the drain of CPW5 is connected to the source of CPW6 and R13, the drain of CPW6 is connected to C7 and R14, the other end of C7 is grounded, the gate of CPW5 is connected to R12, the gate of CPW6 is connected to R14, the other ends of R8, R10, R11, R12, R13, R14, and R9 are connected to the common end connected to R3 and R4, the other end of R3 is connected to the power supply VC3, and the other end of R4 is grounded.

[0017] Furthermore, the other ends of R5, R6, and R7 are connected to R1 and R2 are connected to a common end, the other end of R1 is connected to a power supply VDD, and the other end of R2 is grounded.

[0018] In summary, the present invention has the following advantages: 1. The present invention utilizes the characteristic that the parasitic Miller capacitance of the radio frequency tube changes continuously with the gate voltage to design a miniaturized, high-precision, easy-to-integrate phase shifter with active amplitude control. By designing the continuously adjustable phase shifter, the appropriate phase can be screened according to the voltage change to achieve free phase selection; at the same time, the electrically adjustable attenuation circuit is introduced to achieve continuous amplitude adjustment, thereby achieving amplitude balance control; 2. The present invention introduces the parasitic Miller capacitance of the radio frequency tube to change with voltage to replace the ordinary device-type varactor diode, which has multiple advantages: first, the chip design method can greatly reduce the area, providing plasticity for the miniaturization and simple control of the phased array radar array; second, the Miller capacitance of the radio frequency tube changes with voltage between chip batches, which is more stable than the performance of the device-type varactor diode between batches, and the consistency between chip batches is good, which can save costs and provide a prerequisite for the stability of the phased array radar; finally, the use of the radio frequency tube Miller capacitance to replace the ordinary device-type varactor diode can integrate the amplifier and attenuator to achieve adjustable gain, with high integration, easy use and area saving; 3. After the present invention introduces the RF tube Miller capacitance that changes with voltage to replace the common device-type varactor diode, the electrically adjustable attenuator can be directly integrated inside the chip, effectively reducing the area and the complexity of the array; 4. The present invention can integrate an active amplifier circuit inside the RF chip to achieve adjustable gain of the entire amplitude and phase continuously adjustable reflective chip, increase the gain when detection is needed, and reduce the gain when stealth is needed, providing more options for phased array radars. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to further illustrate the above and other advantages and features of various embodiments of the present invention, a more specific description of various embodiments of the present invention will be presented with reference to the accompanying drawings. It will be understood that these drawings only depict typical circuits of the present invention and are therefore not to be considered as limiting the scope thereof. In the accompanying drawings, for the sake of clarity, inductance L, capacitance C, resistance R, power supplies VC, VD, and radio frequency tube CPW are used to mark and represent.

[0020] Figure 1 The schematic diagram of the circuit structure of the reflective continuously adjustable phase shifter of the present invention is shown.

[0021] Figure 2 The schematic diagram of the circuit structure of the continuously adjustable attenuator of the present invention is shown.

[0022] Figure 3 The schematic diagram of the circuit structure of the reflective amplitude and phase continuously adjustable chip of the present invention is shown.

[0023] Figure 4 The graph shows the measured results of the attenuation of the continuously adjustable attenuator circuit of the present invention changing with voltage.

[0024] Figure 5 The diagram shows the measured results of the phase change of the reflective continuous adjustable phase shifter circuit according to the present invention with respect to the voltage.

[0025] Figure 6 The figure shows the phase amplitude balance fitting result of the reflective amplitude and phase continuously adjustable chip of the present invention. DETAILED DESCRIPTION

[0026] It should be pointed out that in the embodiments of the present invention, for the sake of clarity and simplicity, only a portion of the circuit structure may be shown. Based on the implementation methods in the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0027] It should also be pointed out that in the description of the present invention, the terms "capacitor", "inductor", "resistor", "RF tube", "connection", "the other end", "grounding", "connected to power supply", etc. represent device characteristics or connection characteristics based on the devices or connection relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not explicitly or implicitly indicate that the referred elements must have specific connection properties and element types. Therefore, they cannot be understood as limitations on the present invention.

[0028] The purpose of the present invention is to provide a reflective chip with high precision, high reliability, miniaturization, and continuously adjustable amplitude and phase. The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0029] Example 1 The embodiment of the present invention provides a reflective chip with continuously adjustable amplitude and phase, comprising: an attenuator with continuously adjustable attenuation and a reflective phase continuously adjustable phase shifter. The two radio frequency devices form a reflective chip with continuously adjustable amplitude and phase.

[0030] Among them, the reflective phase-continuously adjustable phase shifter has the function of controlling the continuous change of the Miller capacitance of the RF tube through continuous voltage change, and its input impedance changes continuously to achieve continuous phase change, thereby enabling the user to control and select the precise phase.

[0031] The phase shifter in this embodiment mainly includes a power supply circuit, a phase shift matching circuit, and a radio frequency tube. Among them, the power supply circuit includes a filter capacitor and an inductor; the phase shift matching circuit includes an inductor and a capacitor; the radio frequency tube is the core part of the phase shifter, that is, it is equivalent to a variable capacitor, and the continuous change of the adjusting voltage realizes the continuous change of the input impedance.

[0032] Specifically, in this embodiment, the phase shifter requires two control power supply interfaces, which are respectively connected to the two ends of the interstage DC capacitor on the RF main circuit through their own filter capacitors and rectifier inductors, and then directly control the gates of the two RF tubes through different matching inductors. The drain and source of the RF tube are short-circuited and directly grounded through the matching inductor.

[0033] This solution uses the characteristic that Miller capacitance changes continuously with gate voltage to design a reflective continuous phase shifter. By introducing the parasitic Miller capacitance of the RF tube that changes with voltage to replace the ordinary device-type varactor diode, it has the following advantages: First, the chip design approach can greatly reduce the area, providing plasticity for the miniaturization and simple control of the phased array radar array; second, compared with different batches of device-type varactor diodes, the chip batches have good consistency, saving costs and providing a prerequisite for the consistency between phased array radar batches; finally, the RF tube Miller capacitor can integrate amplifiers and attenuators to achieve adjustable gain, with high integration, easy use and area saving.

[0034] The continuously adjustable phase shifter of the present invention utilizes the characteristic that the parasitic Miller capacitance of the radio frequency tube changes continuously with the gate voltage to realize continuous impedance change, and then realizes 360° phase change by changing the control voltage, realizing free phase selection. At the same time, this scheme also introduces an electrically adjustable attenuation circuit to realize continuous amplitude adjustment and realize amplitude balance control.

[0035] Example 2 This embodiment provides a reflective chip with continuously adjustable amplitude and phase. Based on the first embodiment, the following improvements are made: Since ordinary reflective phase shifters have large insertion loss, they will greatly attenuate antenna gain, which has a great impact on the detection distance and detection accuracy of phased array radars. After introducing the fact that the parasitic capacitance of the RF tube changes with voltage, the advantage of the chip's ease of integration can be used to integrate active amplifier circuits inside the RF chip to achieve adjustable gain for the entire amplitude and phase continuously adjustable reflective chip, increase the gain when detection is needed, and reduce the gain when stealth is needed, providing more options for phased array radars.

[0036] Example 3 On the basis of Example 1 or Example 2, this embodiment further describes the electrically adjustable attenuation circuit introduced into the front end of the reflective phase shifter: Since the reflective phase shifter designed with ordinary varactor diodes has poor amplitude balance, the amplitude of the phase shifter cannot be adjusted when meeting specific phase shifting conditions. When the amplitude requirements are strict, an adjustable attenuator needs to be connected for amplitude adjustment, which makes the array layout complicated. However, after introducing the RF tube Miller capacitance that changes with voltage to replace the ordinary device-type varactor diode, the electrically adjustable attenuator can be directly integrated inside the chip, effectively reducing the area and reducing the complexity of the array.

[0037] This solution cascades the reflective phase shifter and the electrically adjustable attenuator, sets the input end of the designed electrically adjustable attenuator as the RF input end, and connects the output end to the input end of the reflective phase continuously adjustable phase shifter to form a reflective chip with continuously adjustable amplitude and phase. The function of the attenuator is to control the continuous change of the impedance of the RF tube through continuous voltage change, so as to achieve continuous adjustable gain of the RF main path and meet the user's demand for controllable and precise gain.

[0038] Specifically, the attenuator in this scheme mainly includes a power supply circuit, an amplitude adjustment circuit, and an amplitude modulation matching circuit, wherein the power supply circuit includes a filter capacitor and an inductor; the amplitude adjustment circuit includes a radio frequency tube, a resistor, and an inductor; and the amplitude modulation matching circuit includes an inductor and a capacitor.

[0039] The electronically adjustable attenuation circuit is divided into two voltage paths. One path is a constant supply voltage, which is divided by the voltage divider resistor inside the chip and connected to the source and drain of the RF tube in series on the RF attenuation main path through the isolation resistor; the other path is a control voltage, which is divided by the voltage divider resistor and connected to the gate of the RF tube in parallel on the RF attenuation main path through the isolation resistor. At the same time, it is connected to the gate of the RF tube in series on the RF attenuation main path through the isolation resistor, and controls the gate voltage of the RF tube in parallel and in series on the RF attenuation main path at the same time. The attenuation of the RF main path can achieve continuous attenuation with the continuous change of voltage, and then the control voltage is selected according to the attenuation to achieve free-style attenuation selection.

[0040] Example 4 This embodiment provides a reflective amplitude and phase continuously adjustable chip, including: Figure 1The attenuation shown is continuously adjustable. Figure 2 The reflective phase-continuously adjustable phase shifter shown in FIG. 1 is composed of the two RF devices. Figure 3 A reflective chip with continuously adjustable amplitude and phase is shown.

[0041] Among them, the structure of the reflective phase shifter with continuously adjustable phase is as follows: Figure 1 As shown, including: RF DC blocking capacitor C3; Control power supply circuit filter capacitors C1 and C2; C4 is both a DC blocking capacitor and also participates in the phase adjustment function; RF current inductors L1 and L2.

[0042] To achieve 360° phase matching inductors, L3, L4, L5, L6, L7, and L8 are involved in frequency band matching and phase within the band; The RF tubes CPW1 and CPW2 provide continuously variable Miller capacitance for the entire circuit, and their input / output impedances change continuously to achieve phase change.

[0043] Specifically, Figure 1 As shown, one end of the DC blocking capacitor C3 is the RF input end of the reflective phase shifter with a continuously adjustable phase (and also the RF output end of the reflective phase shifter with a continuously adjustable phase), and the input and output ends are shared to form a single-ended reflective phase shifter, the other end of C3 is connected to L3, the other end of L3 is connected to C4, L1, and L5, the other end of L1 is connected to C1 and the power supply end VC1, the other end of C1 is grounded, the other end of L5 is connected to the gate of CPW1, the source and drain of CPW1 are connected and then connected to L7, the other end of L7 is grounded, the other end of C4 is connected to L4, the other end of L4 is connected to L2 and L6, the other end of L2 is connected to C2 and the power supply VC2, the other end of C2 is grounded, the other end of L6 is connected to the gate of CPW2, the source and drain of CPW2 are connected and then connected to L8, and the other end of L8 is grounded.

[0044] like Figure 1 As shown, the attenuator with continuously adjustable attenuation includes: RF DC blocking capacitors C5, C6, C7, C8; High-resistance resistors R5, R6, R7, R8, R9, R10, R11, R12, R13, and R14 are used to isolate radio frequency signals; The purpose of the low value resistors R15 and R16 is to connect small resistors in parallel with the parasitic resistances of the RF tubes CPW3 and CPW4; The purpose of the voltage-dividing resistors R1, R2, R3, and R4 is to divide the control voltage and provide a low voltage for the RF tubes CPW3 and CPW4; RF tubes CPW3, CPW4, CPW5, CPW6; Inductors L9, L10, L11, L12.

[0045] Among them, one end of the DC blocking capacitor C5 is the input end of the electrically adjustable attenuator, and the other end is connected to the source of CPW3 and L9 and R5. The other end of L9 is connected to R15. The other end of R15 is connected to L10. The other end of L10 is connected to the drain of CPW3. The gate of CPW3 is connected to R8. The drain of CPW3 is connected to R6, C6, the source of CPW4, and L11. The other end of L11 is connected to R16. The other end of R16 is connected to L12. The other end of L12 is connected to the drain of CPW4, R7, and C8. The other end of C8 is the RF output end of the electrically adjustable attenuator. The gate of CPW4 is connected to R9. The other end of C6 is connected to the source of CPW5 R10, the drain of CPW5 is connected to the source of CPW6 and R13, the drain of CPW6 is connected to C7 and R14, the other end of C7 is grounded, the gate of CPW5 is connected to R12, the gate of CPW6 is connected to R14, the other ends of R8, R10, R11, R12, R13, R14, and R9 are connected to the common end connected to R3 and R4, the other end of R3 is connected to the power supply VC3, the other end of R4 is grounded, the other ends of R5, R6, and R7 are connected to the common end connected to R1 and R2, the other end of R1 is connected to the power supply VDD, and the other end of R2 is grounded.

[0046] Figure 4 The measured results of the attenuation of the continuously adjustable attenuator circuit of the present invention with voltage are shown. The left figure (a) shows the curve of the attenuation with voltage at 10GHz frequency point, the voltage changes from 0V to 5V, and the attenuation changes from 19dB to 2.5dB, and the right figure (b) shows the curves of attenuation with voltage at multiple frequency points.

[0047] Figure 5 The measured results of the phase change of the reflective continuous adjustable phase shifter circuit of the present invention with voltage are shown in the figure. The figure shows that 360° phase shift can be achieved under the control voltage at different frequency points, but under different phase shift conditions, the amplitude balance is poor, and an amplitude unbalanced 360° phase shift circle is achieved.

[0048] Figure 6 The figure shows the phase amplitude balance fitting result of the reflection type amplitude phase continuous adjustable chip of the present invention. Figure 5 The realized 360° phase shift with an unbalanced amplitude can be adjusted to a 360° phase shift circle with a balanced amplitude.

[0049] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any simple modification or equivalent change made to the above embodiment based on the technical essence of the present invention shall fall within the protection scope of the present invention.

Claims

1. A reflective chip with continuously adjustable amplitude and phase, characterized in that: It comprises a reflective phase shifter with continuously adjustable phase and an attenuator with continuously adjustable attenuation connected thereto, wherein the phase shifter comprises a power supply circuit, a phase shift matching circuit and a radio frequency tube; the power supply circuit comprises two power supply control interfaces, the two power supply control interfaces are respectively connected to the two ends of the interstage DC capacitor on the radio frequency main circuit through their own filter capacitors and effusion inductors, and then directly control the grids of the two radio frequency tubes through different matching inductors respectively, the drain and source of the radio frequency tube are short-circuited and connected, and then directly grounded through matching inductors respectively; the radio frequency tube is equivalent to a variable capacitor, and the continuous change of the input impedance is realized by adjusting the voltage to change continuously.

2. A reflective chip with continuously adjustable amplitude and phase as claimed in claim 1, characterized in that: The phase shifter includes a radio frequency DC blocking capacitor C3, one end of which serves as a radio frequency input end and a radio frequency output end at the same time, and the input and output ends are shared to form a single-ended reflection phase shifter.

3. A reflective chip with continuously adjustable amplitude and phase as claimed in claim 2, characterized in that: The phase shifter includes control power supply circuit filter capacitors C1 and C2, stage DC isolation capacitor C4 which is both a DC isolation capacitor and participates in phase adjustment function, RF inductors L1 and L2, inductors L3~L8 participating in frequency band matching and phase within the frequency band, and RF tubes CPW1 and CPW2 providing continuously variable Miller capacitance for the entire circuit; the other end of the RF DC isolation capacitor C3 is connected to L3, the other end of L3 is connected to C4, L1, and L5, the other end of L1 is connected to C1 and the power supply terminal VC1, the other end of C1 is grounded, the other end of L5 is connected to the gate of CPW1, the source and drain of CPW1 are connected and then connected to L7, the other end of L7 is grounded, the other end of C4 is connected to L4, the other end of L4 is connected to L2 and L6, the other end of L2 is connected to C2 and the power supply VC2, the other end of C2 is grounded, the other end of L6 is connected to the gate of CPW2, the source and drain of CPW2 are connected and then connected to L8, and the other end of L8 is grounded.

4. A reflective chip with continuously adjustable amplitude and phase as claimed in claim 1, characterized in that: The input end of the attenuator is a radio frequency input end, and the output end is connected to the input end of a reflective phase continuously adjustable phase shifter, forming an amplitude and phase continuously adjustable reflective chip with continuously variable amplitude and phase.

5. A reflective chip with continuously adjustable amplitude and phase as claimed in any one of claims 1 to 4, characterized in that: The attenuator includes a power supply circuit, an amplitude adjustment circuit, and an amplitude modulation matching circuit. The power supply circuit includes a filter capacitor and an inductor; the amplitude adjustment circuit includes a radio frequency tube, a resistor, and an inductor connected in series on a radio frequency path; and the amplitude modulation matching circuit includes an inductor and a capacitor.

6. A reflective chip with continuously adjustable amplitude and phase as claimed in claim 5, characterized in that: The power supply circuit includes two control voltages, one of which is a constant supply voltage, which is divided by a voltage-dividing resistor inside the chip and connected to the source and drain of the radio frequency tube in series on the radio frequency attenuation main circuit through an isolation resistor; the other control voltage is divided by a voltage-dividing resistor, connected to the gate of the radio frequency tube in parallel on the radio frequency attenuation main circuit through an isolation resistor, and is connected to the gate of the radio frequency tube in series on the radio frequency attenuation main circuit through an isolation resistor, and controls the gate voltage of the radio frequency tubes in parallel and in series on the radio frequency attenuation main circuit at the same time; continuous attenuation is achieved by continuously changing the attenuation of the radio frequency main circuit with the voltage, and then the control voltage is selected according to the attenuation, so as to achieve free-style attenuation selection.

7. A reflective chip with continuously adjustable amplitude and phase as claimed in claim 5, characterized in that: The attenuator includes RF DC blocking capacitors C5~C8, RF tubes CPW3~CPW6, inductors L9~L12, high-resistance resistors R5~R14 for isolating RF signals, low-value resistors R15 and R16 for being connected in parallel with the parasitic resistances of RF tubes CPW3 and CPW4, and voltage-dividing resistors R1~R4 for providing low voltage to RF tubes CPW3 and CPW4 after dividing the control voltage.

8. A reflective chip with continuously adjustable amplitude and phase as claimed in claim 7, characterized in that: One end of the DC blocking capacitor C5 is the attenuator input end, and the other end is connected to the source of CPW3 and L9 and R5. The other end of L9 is connected to R15, the other end of R15 is connected to L10, the other end of L10 is connected to the drain of CPW3, and the gate of CPW3 is connected to R8; the drain of CPW3 is connected to R6, C6, the source of CPW4, and L11, the other end of L11 is connected to R16, the other end of R16 is connected to L12, the other end of L12 is connected to the drain of CPW4, R7, and C8, and the other end of C8 is the attenuator RF output end.

9. A reflective chip with continuously adjustable amplitude and phase as claimed in claim 8, characterized in that: The gate of CPW4 is connected to R9, the other end of C6 is connected to the source of CPW5 R10, the drain of CPW5 is connected to the source of CPW6 and R13, the drain of CPW6 is connected to C7 and R14, the other end of C7 is grounded, the gate of CPW5 is connected to R12, the gate of CPW6 is connected to R14, the other ends of R8, R10, R11, R12, R13, R14, and R9 are connected to the common end connected to R3 and R4, the other end of R3 is connected to the power supply VC3, and the other end of R4 is grounded.

10. A reflective chip with continuously adjustable amplitude and phase as claimed in claim 8 or 9, characterized in that: The other ends of R5, R6, and R7 are connected to R1, R2 is connected to the common end, the other end of R1 is connected to the power supply VDD, and the other end of R2 is grounded.

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