Ultra-wideband digitally controlled phase shifter, phase shifting method and receiver

Abstract

The present invention provides an ultra-wideband digitally controlled phase shifter, and relates to the technical field of digitally controlled phase shifters. The present invention realizes precise control of small-angle phases by combining various phase shifting units, and maintains stable phase shift characteristics within a wider frequency range. At the same time, by adopting a switch unit and an adjustment branch composed of a FET tube, a flexible and efficient phase control mechanism is provided. The capacitor connection mode can be adjusted through a simple switch operation to achieve a variety of equivalent capacitor combinations, thereby accurately controlling the phase. Compared with traditional designs, it can not only reduce the dependence on discrete adjustment elements, reduce circuit complexity and volume, but also improve the range and accuracy of phase adjustment, thereby improving the response speed and working dynamic range of the system, and playing the effect of improving the flexibility and accuracy of phase adjustment, and meeting the needs of high-frequency and broadband applications for fast and accurate signal processing.

Description

Technical Field

[0001] The present invention relates to the technical field of digitally controlled phase shifters, in particular to an ultra-wideband digitally controlled phase shifter. Background Art

[0002] In modern communication systems, with the increase of spectrum resources and the improvement of signal processing complexity, phase shifters need to have higher phase adjustment accuracy and frequency response stability. Traditional phase shifters rely on fixed components and simple switching mechanisms, making it difficult to achieve fine phase adjustment without affecting circuit complexity and size. This limitation is particularly evident in application scenarios that require fast response and high-precision phase control, such as in 5G communications, radar systems, and phased array antennas, where the accuracy of signal processing is directly related to the performance of the entire system. However, the programmable capacitor adjustment mechanism in the prior art is often complex and requires a large number of components, resulting in complex circuit design, bulky volume, and increased energy consumption.

[0003] In the prior art, the publication number CN115566379A discloses an ultra-wideband digital phase shifter covering K and Ka bands, including a 180° phase shift unit, a 45° phase shift unit, a 22.5° phase shift unit, a 5.625° phase shift unit, a 11.25° phase shift unit and a 90° phase shift unit, and the six phase shift units are connected in any order; the 5.625° phase shift unit, the 11.25° phase shift unit and the 22.5° phase shift unit adopt a structure combining a magnetically coupled full-pass network with a parallel capacitor; the 45° phase shift unit and the 90° phase shift unit adopt a structure combining a coupled and uncoupled full-pass network, and the 180° phase shift unit adopts a switch-selective bandpass network structure. Although it can adjust the phase of the signal, the capacitance of each phase shift unit in its internal structure is fixed and cannot be adjusted according to demand, which correspondingly reduces the accuracy and adjustable range of the phase adjustment, and cannot adapt to the adjustment requirements of high-frequency fast signals.

[0004] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute the prior art that is already known to one of ordinary skill in the art. Summary of the invention

[0005] The object of the present invention is to provide an ultra-wideband digitally controlled phase shifter to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An ultra-wideband digitally controlled phase shifter, comprising: a 5.625° phase shift unit, a 11.25° phase shift unit, a 22.5° phase shift unit, a 45° phase shift unit, a 90° phase shift unit, and a 180° phase shift unit, wherein the 5.625° phase shift unit, the 11.25° phase shift unit, the 22.5° phase shift unit, the 45° phase shift unit, the 90° phase shift unit, and the 180° phase shift unit are connected in series;

[0008] The 5.625° phase shift unit and the 11.25° phase shift unit have the same structure, both comprising a high-pass filter module and a low-pass filter module, wherein the high-pass filter module is electrically connected to the low-pass filter module and is used to control the ground state and the phase shift state of the 5.625° phase shift unit and the 11.25° phase shift unit respectively;

[0009] The 22.5° phase shift unit includes a 22.5° base state module and a 22.5° phase shift state module, and the 22.5° base state module and the 22.5° phase shift state module are electrically connected and are used to control the base state and the phase shift state of the 22.5° phase shift unit respectively;

[0010] The 45° phase shift unit, the 90° phase shift unit and the 180° phase shift unit each include a universal base state module, the universal base state modules of the 45° phase shift unit and the 90° phase shift unit are electrically connected to a universal phase shift state module, and the universal base state module and the universal phase shift state module of the 45° phase shift unit and the 90° phase shift unit are used to control the base state and the phase shift state of the 45° phase shift unit and the 90° phase shift unit, respectively;

[0011] The universal base state module of the 180° phase shift unit is electrically connected to a 180° phase shift state module, and the universal base state module and the 180° phase shift state module of the 180° phase shift unit are respectively used to control the base state and the phase shift state of the 180° phase shift unit.

[0012] Preferably, the high-pass filter module is a FET tube, and the source and drain of the FET tube serve as the input and output ends of the 5.625° phase shift unit respectively;

[0013] The low-pass filter module includes a microstrip line, which is connected in parallel with the FET tube in the high-pass filter module. The microstrip line is electrically connected to two FET tubes connected in series. One end of the two FET tubes is electrically connected to the microstrip line, and the other end is grounded. An inductor is electrically connected between the two FET tubes and then grounded.

[0014] Preferably, the working states of the FET tube in the high-pass filter module and a FET tube close to the microstrip line in the low-pass filter module are the same, and the working states of the two FET tubes in the low-pass filter module are opposite;

[0015] When the FET in the high-pass filter module is turned on, one FET near the microstrip line in the low-pass filter module is turned on, and the other FET is turned off, the 5.625° phase shift unit is in the ground state;

[0016] When the FET tube in the high-pass filter module is turned off, one FET tube close to the microstrip line in the low-pass filter module is turned off, and the other FET tube is turned on, the 5.625° phase shift unit is in a phase shift state.

[0017] Preferably, the 22.5° ground state module includes a three-terminal all-pass network structure, wherein the first port and the second port of the all-pass network structure serve as the input and output of the 22.5° phase shift unit respectively, and the first port and the second port are connected to each other through a capacitor, and the third port of the all-pass network structure is electrically connected to a FET tube and a capacitor, the other end of the capacitor is grounded, and the other end of the FET tube is electrically connected to another capacitor and then grounded;

[0018] The 22.5° phase-shift module includes two groups of inductors, which are electrically connected to the first port and the second port of the full-pass network structure respectively, and a FET tube and a capacitor are connected in series between the two groups of inductors.

[0019] Preferably, the working states of the FET tube in the 22.5° base state module and the FET tube in the 22.5° phase shift state module are opposite;

[0020] When the FET tube in the 22.5° base state module is turned on and the FET tube in the 22.5° phase shift module is turned off, the 22.5° phase shift unit is in the base state;

[0021] When the FET tube in the 22.5° base state module is turned off and the FET tube in the 22.5° phase shift module is turned on, the 22.5° phase shift unit is in the phase shift state.

[0022] Preferably, the universal base state module comprises a three-terminal all-pass network structure, and the third port of the all-pass network structure is electrically connected to a capacitor and then grounded;

[0023] The universal phase-shifting module comprises two three-terminal switch units, wherein the first ports of the two switch units are electrically connected to the first port and the second port of the all-pass network structure respectively, the second ports of the two switch units are electrically connected to a capacitor respectively and then electrically connected to the first port and the second port of the all-pass network structure, and the third ports of the two switch units are respectively used as the input end and the output end of the 45° phase-shifting unit and the 90° phase-shifting unit;

[0024] The 180° phase-shifting state module also includes two three-terminal switch units, the first ports of the two switch units are electrically connected to the first port and the second port of the all-pass network structure respectively, the second ports of the two switch units are electrically connected to a capacitor respectively and then electrically connected to the first port and the second port of the all-pass network structure, the 180° phase-shifting state module also includes a replica base state module, the replica base state module also includes a three-terminal all-pass network structure, the third port of the all-pass network structure is electrically connected to a capacitor and then grounded, the first port of the all-pass network structure in the replica base state module is electrically connected to the third port of the switch unit close to the second port of the all-pass network structure in the general base state module, the third port of the other switch unit and the second port of the all-pass network structure in the replica base state module serve as the input and output of the 180° phase-shifting unit respectively.

[0025] Preferably, the all-pass network structure is two mutually coupled inductors, the head ends and the tail ends of the two inductors are electrically connected to the first port and the second port of the all-pass network structure respectively, and the remaining two ends of the two inductors are connected in series and electrically connected to the third port of the all-pass network structure;

[0026] The switch unit comprises two FET tubes connected in series, one end of the two FET tubes is electrically connected to the third port of the switch unit, the remaining end of one of the FET tubes is electrically connected to the second port of the switch unit, and the remaining end of the other FET tube is electrically connected to the input end of the adjustment structure;

[0027] The switch unit also includes two groups of selection structures, all of which are FET tubes, one end of the FET tube of the selection structure is electrically connected to the second port of the switch unit and the input end of the adjustment structure, respectively, and the other end is grounded; the adjustment structure includes at least two groups of adjustment branches, each group of adjustment branches includes a first control element and a second control element connected in series with each other, a capacitor is connected in series between the first control element and the second control element, the other end of the first control element is electrically connected between the first control element and the capacitor of another adjacent group of adjustment branches, the other end of the second control element is electrically connected to the third port of the switch unit, a third control element is electrically connected between the first control element and the capacitor, the other end of the third control element is electrically connected between the capacitor and the second control element of another adjacent group of adjustment branches, the other end of the third control element in the outermost adjustment branch is grounded, and the side of the first control element in the outermost adjustment branch away from the capacitor is used as the input end.

[0028] Preferably, the first control element, the second control element and the third control element are all FET tubes, and the working states of the two selection structures are opposite;

[0029] When the FET tube of the selection structure near the second port of the switch unit is turned on, and the FET tube of the selection structure near the third port of the switch unit is turned off, the 45° phase shift unit, the 90° phase shift unit, and the 180° phase shift unit are all in the ground state;

[0030] When the FET tube of the selection structure near the second port of the switch unit is turned off and the FET tube of the selection structure near the third port of the switch unit is turned on, the 45° phase shift unit, the 90° phase shift unit and the 180° phase shift unit are all in phase shift state.

[0031] An ultra-wideband digitally controlled phase shifting method is applicable to the ultra-wideband digitally controlled phase shifter mentioned above, and the specific steps include:

[0032] S1: Calculate the capacitance value of the 180° phase shift unit in the phase shifter when it switches to the phase shift state;

[0033] S2: adjusting the working states of the first control element, the second control element, and the third control element in each group of regulating branches, and obtaining corresponding equivalent capacitance values ​​by changing the connection relationship of capacitors in different regulating branches;

[0034] S3: Adjust the working state of each phase shifting unit in the phase shifter to complete the phase adjustment of the input signal.

[0035] An ultra-wideband digitally controlled receiver, comprising the ultra-wideband digitally controlled phase shifter, and further comprising an array antenna, the array antenna being electrically connected to the ultra-wideband digitally controlled phase shifter and being used to receive signals of different phases and send them to the ultra-wideband digitally controlled phase shifter for phase adjustment.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] The present invention realizes precise control of small-angle phases by combining various phase-shifting units, and maintains stable phase-shift characteristics within a wider frequency range. At the same time, by adopting a switch unit and a regulating branch composed of FET tubes, a flexible and efficient phase control mechanism is provided. The capacitor connection mode can be adjusted through simple switching operations to achieve a variety of equivalent capacitor combinations, thereby accurately controlling the phase. Compared with traditional designs, it can not only reduce the dependence on discrete adjustment elements, reduce circuit complexity and volume, but also improve the range and accuracy of phase adjustment, thereby improving the response speed and power efficiency of the system, and play an effect of improving the flexibility and accuracy of phase adjustment, meeting the needs of high-frequency and broadband applications for fast and accurate signal processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 Schematic diagram of the circuit structure of 5.625° and 11.25° phase shift units;

[0040] Figure 3 Schematic diagram of the circuit structure of a 22.5° phase shift unit;

[0041] Figure 4 It is a circuit structure schematic diagram of 45° and 90° phase shifting units;

[0042] Figure 5 Schematic diagram of the circuit structure of a 180° phase shift unit;

[0043] Figure 6 Schematic diagram of the circuit structure of the switch unit. DETAILED DESCRIPTION

[0044] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0045] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0046] Example:

[0047] See also Figure 1 to Figure 6 , the present invention provides a technical solution:

[0048] An ultra-wideband digitally controlled phase shifter includes: a 5.625° phase shift unit, a 11.25° phase shift unit, a 22.5° phase shift unit, a 45° phase shift unit, a 90° phase shift unit, and a 180° phase shift unit, wherein the 5.625° phase shift unit, the 11.25° phase shift unit, the 22.5° phase shift unit, the 45° phase shift unit, the 90° phase shift unit, and the 180° phase shift unit are connected in series. The six phase shift units can be arranged in any order according to actual needs.

[0049] The 5.625° phase shift unit and the 11.25° phase shift unit have the same structure, both including a high-pass filter module and a low-pass filter module, the high-pass filter module and the low-pass filter module are electrically connected, and are used to control the ground state and the phase shift state of the 5.625° phase shift unit and the 11.25° phase shift unit respectively;

[0050] In the present embodiment, the FET tubes used are specifically MOSFETs, so specifically, the high-pass filter module is a MOS tube Q1, and the source and drain of the MOS tube Q1 are respectively used as the input end and the output end of the 5.625° phase shift unit, and the low-pass filter module includes a microstrip line, the microstrip line is connected in parallel with the MOS tube Q1 in the high-pass filter module, and the microstrip line is electrically connected to two MOS tubes Q2 and Q3 connected in series with each other, one end of the two MOS tubes is electrically connected to the microstrip line, and the other end is grounded, an inductor L1 is electrically connected between the two MOS tubes and then grounded, and the working states of Q2 and Q3 are different.

[0051] The working states of the FET tube in the high-pass filter module and the FET tube close to the microstrip line in the low-pass filter module are the same, and the working states of the two FET tubes in the low-pass filter module are opposite;

[0052] When the FET in the high-pass filter module is turned on, one FET near the microstrip line in the low-pass filter module is turned on, and the other FET is turned off, the 5.625° phase shift unit is in the ground state;

[0053] When the FET tube in the high-pass filter module is turned off, one FET tube close to the microstrip line in the low-pass filter module is turned off, and the other FET tube is turned on, the 5.625° phase shift unit is in a phase shift state.

[0054] By combining high-pass and low-pass filter modules, precise control of small-angle phase is achieved, which can achieve more detailed phase adjustment, help maintain stable phase shift characteristics in a wider frequency range, and the switching characteristics of MOS tubes allow rapid switching between the ground state and the phase shift state, which is more suitable for high-frequency applications. The combination of microstrip lines and MOS tubes can achieve a more compact circuit design. Compared with the traditional discrete component design, it reduces the number of discrete components used in traditional phase shifters, simplifies circuit design and manufacturing processes, saves space, and reduces potential failure points.

[0055] The 22.5° phase shift unit includes a 22.5° base state module and a 22.5° phase shift state module, the 22.5° base state module and the 22.5° phase shift state module are electrically connected and are used to control the base state and the phase shift state of the 22.5° phase shift unit respectively.

[0056] The 22.5° base state module includes a three-terminal all-pass network structure, wherein the first port and the second port of the all-pass network structure serve as the input end and the output end of the 22.5° phase shift unit respectively, and the first port and the second port are interconnected through a capacitor C1, and the third port of the all-pass network structure is electrically connected to a MOS tube Q4 and a capacitor C2, the other end of the capacitor C2 is grounded, and the other end of the MOS tube Q4 is electrically connected to another capacitor Q5 and then grounded, and the all-pass network structure is two mutually coupled inductors, the head end and the tail end of the two inductors are electrically connected to the first port and the second port of the all-pass network structure respectively, and the remaining two ends of the two inductors are connected in series and electrically connected to the third port of the all-pass network structure.

[0057] The all-pass network structure provides a flat phase response in the circuit, ensuring precise phase adjustment between the base state and the phase-shifted state. By designing specific phase characteristics, the phase shift can be better controlled, and the two coupled inductors provide detailed control of the signal path, enhancing the phase consistency of the overall circuit, while also helping to maintain stable phase characteristics over a wide frequency range, suitable for ultra-wideband applications.

[0058] The 22.5° phase-shift module includes two groups of inductors L2 and L3, which are electrically connected to the first port and the second port of the all-pass network structure respectively, and a MOS tube Q6 and a capacitor C3 are connected in series between the two groups of inductors.

[0059] The working states of the MOS tube in the 22.5° base state module and the MOS tube in the 22.5° phase shift state module are opposite;

[0060] When the MOS tube in the 22.5° base state module is turned on and the MOS tube in the 22.5° phase shift module is turned off, the 22.5° phase shift unit is in the base state;

[0061] When the MOS tube in the 22.5° base state module is turned off and the MOS tube in the 22.5° phase shift module is turned on, the 22.5° phase shift unit is in the phase shift state.

[0062] Through the combination of the full-pass network structure and the MOS tube, by reducing the number of discrete components and optimizing the circuit layout, the implementation complexity is simplified, functional integration is achieved, and the occupancy of the circuit board space is reduced, so that the phase shift unit can be easily integrated into a more complex system, and more phase angle adjustments can be achieved through combination, thereby improving the flexibility and adaptability of the system.

[0063] The 45° phase shift unit, the 90° phase shift unit and the 180° phase shift unit each include a universal base state module, the universal base state modules of the 45° phase shift unit and the 90° phase shift unit are electrically connected to a universal phase shift state module, and the universal base state modules and the universal phase shift state modules of the 45° phase shift unit and the 90° phase shift unit are used to control the base state and the phase shift state of the 45° phase shift unit and the 90° phase shift unit, respectively;

[0064] The universal base state module of the 180° phase shift unit is electrically connected to a 180° phase shift state module. The universal base state module and the 180° phase shift state module of the 180° phase shift unit are used to control the base state and the phase shift state of the 180° phase shift unit respectively.

[0065] The universal base state module includes a three-terminal all-pass network structure, and the third port of the all-pass network structure is electrically connected to a capacitor C4 and then grounded;

[0066] The universal phase-shifting module includes two three-terminal switch units, the first ports of the two switch units are electrically connected to the first port and the second port of the all-pass network structure respectively, the second ports of the two switch units are electrically connected to a capacitor C5 respectively and then electrically connected to the first port and the second port of the all-pass network structure, and the third ports of the two switch units are used as the input end and the output end of the 45° phase-shifting unit and the 90° phase-shifting unit respectively;

[0067] The 180° phase-shifting state module also includes two three-terminal switch units, the first ports of the two switch units are electrically connected to the first port and the second port of the all-pass network structure respectively, the second ports of the two switch units are electrically connected to a capacitor C5 respectively and then electrically connected to the first port and the second port of the all-pass network structure, the 180° phase-shifting state module also includes a replica base state module, the replica base state module also includes a three-terminal all-pass network structure, the third port of the all-pass network structure is electrically connected to a capacitor C4 and then grounded, the first port of the all-pass network structure in the replica base state module is electrically connected to the third port of the switch unit close to the second port of the all-pass network structure in the general base state module, the third port of the other switch unit and the second port of the all-pass network structure in the replica base state module serve as the input and output of the 180° phase-shifting unit respectively.

[0068] The switch unit includes two MOS tubes Q6 and Q7 connected in series, one end of the two MOS tubes Q6 and Q7 is electrically connected to the third port of the switch unit, the remaining end of one MOS tube Q6 is electrically connected to the second port of the switch unit, and the remaining end of the other MOS tube Q7 is electrically connected to the input end of the adjustment structure;

[0069] The switch unit also includes two groups of selection structures, all of which are MOS tubes, namely Q8 and Q9. One end of the MOS tube of the selection structure is electrically connected to the second port of the switch unit and the input end of the adjustment structure, and the other end is grounded. The adjustment structure includes at least two groups of adjustment branches, each group of adjustment branches includes a first control element Q10 and a second control element Q11 connected in series with each other, a capacitor C6 is connected in series between the first control element and the second control element, the other end of the first control element is electrically connected between the first control element and the capacitor of another adjacent group of adjustment branches, the other end of the second control element is electrically connected to the third port of the switch unit, a third control element Q12 is electrically connected between the first control element and the capacitor, the other end of the third control element is electrically connected between the capacitor and the second control element of another adjacent group of adjustment branches, the other end of the third control element in the outermost adjustment branch is grounded, and the side of the first control element in the outermost adjustment branch away from the capacitor is used as the input end. The first control element, the second control element, and the third control element are all MOS tubes, and the working states of the two selection structures are opposite.

[0070] It can be understood that this structure of the switch unit is equivalent to forming a single-pole double-throw circuit, in which the MOS tube plays the role of a switch, and when the second port of the switch unit is connected, it is in the base state, and when the third port is connected, it is in the phase shift state. In addition, the purpose of adjusting the capacitance can be achieved by changing the switches of different MOS tubes in the adjustment branch. Specifically, when only the first control element and the second control element of the outermost regulating branch are closed, only one capacitor in the regulating branch is connected to the main circuit, and the corresponding equivalent capacitance value is equal to the capacitance value of the capacitor; when the first control element and the second control element of the adjacent regulating branch are closed, the capacitance of the adjacent two regulating branches is equivalent to being connected in parallel to the main circuit, and the equivalent capacitance value is equivalent to the sum of the capacitance values ​​of the two capacitors. If the second control element of the outermost regulating branch and the first control element of the other regulating branch are closed, and the third control element of the other regulating branch is opened, then the capacitance of the adjacent two regulating branches is equivalent to being connected in series to the main circuit, and the equivalent capacitance value is equal to the quotient of the product of the capacitance values ​​of the two capacitors and the sum of the capacitance values. Therefore, by adjusting the switches of the control elements in different regulating branches, the connection relationship between the capacitors can be changed, thereby achieving the adjustment of the capacitors and achieving higher precision phase control. At the same time, it can be understood that the number of regulating branches can be increased according to actual needs, thereby changing the connection relationship between more groups of capacitors, thereby expanding the adjustment range of the equivalent capacitance value, and further improving the precision of phase control.

[0071] When the MOS tube of the selection structure near the second port of the switch unit is turned on, and the MOS tube of the selection structure near the third port of the switch unit is turned off, the 45° phase shift unit, the 90° phase shift unit, and the 180° phase shift unit are all in the ground state;

[0072] When the MOS tube of the selection structure near the second port of the switch unit is turned off and the MOS tube of the selection structure near the third port of the switch unit is turned on, the 45° phase shift unit, the 90° phase shift unit and the 180° phase shift unit are all in phase shift state.

[0073] In the present invention, although the structures of the all-pass network structures in different phase shifting units are the same, the specific parameters of the inductor windings therein may be different. Specifically:

[0074] In the full-pass network structure of the 22.5° phase-shifting unit, the inductor is wound 5 times, the inductor line width is 8um, and the line spacing is 3.5um;

[0075] In the all-pass network structure of the universal base-state module of the 45° phase-shift unit and the 90° phase-shift unit, the inductor is wound 6 times, the inductor line width is 7um, and the line spacing is 4um;

[0076] In the full-pass network structure of the universal phase-shifting module of the 45° phase-shifting unit, the inductor is wound 3.5 times, the inductor line width is 9um, and the line spacing is 3um;

[0077] In the full-pass network structure of the universal phase-shifting module of the 90° phase-shifting unit, the inductor is wound 3.5 times, the inductor line width is 9um, and the line spacing is 3.5um;

[0078] In the all-pass network structure of the universal base-state module of the 180° phase-shifting unit, the inductor is wound 7.5 times, the inductor line width is 6um, and the line spacing is 3um;

[0079] In the full-pass network structure of the 180° phase-shifting state module of the 180° phase-shifting unit, the inductor is wound 2.5 times, the inductor line width is 8um, and the line spacing is 3.5um.

[0080] By adjusting the number of turns, line width and line spacing of the inductor, the inductance value of each full-pass network structure can be accurately adjusted, thereby achieving flexible adjustment of the phase response, effectively reducing the adverse effects of parasitic capacitance and parasitic inductance on circuit performance, improving phase shifting accuracy and stability, and increasing the Q value of the inductor and reducing losses, thereby improving the power efficiency of the entire circuit. Moreover, the inductance parameters of each phase shift unit can be adjusted according to actual needs, which is convenient for modular production and design optimization.

[0081] The present invention also provides an ultra-wideband digitally controlled phase shifting method, which is applicable to the ultra-wideband digitally controlled phase shifter mentioned above, and the specific steps include:

[0082] S1: Calculate the capacitance value of the 180° phase shift unit in the phase shifter when it switches to the phase shift state;

[0083] S2: adjusting the working states of the first control element, the second control element, and the third control element in each group of regulating branches, and obtaining corresponding equivalent capacitance values ​​by changing the connection relationship of capacitors in different regulating branches;

[0084] S3: Adjust the working state of each phase shifting unit in the phase shifter to complete the phase adjustment of the input signal.

[0085] The present invention also provides an ultra-wideband digitally controlled receiver, which includes the above-mentioned ultra-wideband digitally controlled phase shifter. The ultra-wideband digitally controlled receiver also includes an array antenna, which is electrically connected to the ultra-wideband digitally controlled phase shifter and is used to receive signals of different phases and send them to the ultra-wideband digitally controlled phase shifter for phase adjustment.

[0086] In summary, the present invention realizes precise control of small-angle phases by combining various phase shifting units, and maintains stable phase shift characteristics within a wider frequency range. At the same time, by adopting a switch unit and an adjustment branch composed of a MOS tube, a flexible and efficient phase control mechanism is provided. The capacitor connection method can be adjusted through a simple switch operation to achieve a variety of equivalent capacitor combinations, thereby accurately controlling the phase. Compared with traditional designs, it reduces dependence on discrete adjustment elements, reduces circuit complexity and volume, and improves the response speed and power efficiency of the system, thereby improving the flexibility and accuracy of phase adjustment, and meeting the needs of high-frequency and broadband applications for fast and accurate signal processing.

[0087] The above formulas are all dimensionless and numerical calculations. The formula is a formula for the most recent real situation obtained by collecting a large amount of data and performing software simulation. The preset parameters in the formula are set by technicians in this field according to actual conditions.

[0088] The above embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination thereof. When implemented by software, the above embodiments may be implemented in whole or in part in the form of a computer program product. Those skilled in the art may appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein may be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software methods depends on the specific application and design constraints of the technical solution.

[0089] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, and may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0090] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. An ultra-wideband digitally controlled phase shifter, characterized in that: include: 5.625° phase shift unit, 11.25° phase shift unit, 22.5° phase shift unit, 45° phase shift unit, 90° phase shift unit, 180° phase shift unit, wherein the 5.625° phase shift unit, 11.25° phase shift unit, 22.5° phase shift unit, 45° phase shift unit, 90° phase shift unit, and 180° phase shift unit are connected in series; The 5.625° phase shift unit and the 11.25° phase shift unit have the same structure, both comprising a high-pass filter module and a low-pass filter module, wherein the high-pass filter module is electrically connected to the low-pass filter module and is used to control the ground state and the phase shift state of the 5.625° phase shift unit and the 11.25° phase shift unit respectively; The 22.5° phase shift unit includes a 22.5° base state module and a 22.5° phase shift state module, and the 22.5° base state module and the 22.5° phase shift state module are electrically connected and are used to control the base state and the phase shift state of the 22.5° phase shift unit respectively; The 45° phase shift unit, the 90° phase shift unit and the 180° phase shift unit each include a universal base state module, the universal base state modules of the 45° phase shift unit and the 90° phase shift unit are electrically connected to a universal phase shift state module, and the universal base state module and the universal phase shift state module of the 45° phase shift unit and the 90° phase shift unit are used to control the base state and the phase shift state of the 45° phase shift unit and the 90° phase shift unit, respectively; The universal base state module of the 180° phase shift unit is electrically connected to a 180° phase shift state module, and the universal base state module and the 180° phase shift state module of the 180° phase shift unit are used to control the base state and the phase shift state of the 180° phase shift unit respectively; The universal base state module includes a three-terminal all-pass network structure, and the third port of the all-pass network structure is electrically connected to a capacitor and then grounded; The universal phase-shifting module comprises two three-terminal switch units, wherein the first ports of the two switch units are electrically connected to the first port and the second port of the all-pass network structure respectively, the second ports of the two switch units are electrically connected to a capacitor respectively and then electrically connected to the first port and the second port of the all-pass network structure, and the third ports of the two switch units are respectively used as the input end and the output end of the 45° phase-shifting unit and the 90° phase-shifting unit; The 180° phase-shifting state module also includes two three-terminal switch units, the first ports of the two switch units are electrically connected to the first port and the second port of the all-pass network structure respectively, the second ports of the two switch units are electrically connected to a capacitor respectively and then electrically connected to the first port and the second port of the all-pass network structure, the 180° phase-shifting state module also includes a replica base state module, the replica base state module also includes a three-terminal all-pass network structure, the third port of the all-pass network structure is electrically connected to a capacitor and then grounded, the first port of the all-pass network structure in the replica base state module is electrically connected to the third port of the switch unit close to the second port of the all-pass network structure in the general base state module, the third port of the other switch unit and the second port of the all-pass network structure in the replica base state module serve as the input and output of the 180° phase-shifting unit respectively.

2. The ultra-wideband digitally controlled phase shifter according to claim 1, characterized in that: The high-pass filter module is a FET tube, and the source and drain of the FET tube serve as the input and output ends of the 5.625° phase shift unit respectively; The low-pass filter module includes a microstrip line, which is connected in parallel with the FET tube in the high-pass filter module. The microstrip line is electrically connected to two FET tubes connected in series. One end of the two FET tubes is electrically connected to the microstrip line, and the other end is grounded. An inductor is electrically connected between the two FET tubes and then grounded.

3. The ultra-wideband digitally controlled phase shifter according to claim 2, characterized in that: The working states of the FET tube in the high-pass filter module and a FET tube close to the microstrip line in the low-pass filter module are the same, and the working states of the two FET tubes in the low-pass filter module are opposite; When the FET in the high-pass filter module is turned on, one FET near the microstrip line in the low-pass filter module is turned on, and the other FET is turned off, the 5.625° phase shift unit is in the ground state; When the FET tube in the high-pass filter module is turned off, one FET tube close to the microstrip line in the low-pass filter module is turned off, and the other FET tube is turned on, the 5.625° phase shift unit is in a phase shift state.

4. The ultra-wideband digitally controlled phase shifter according to claim 1, characterized in that: The 22.5° base state module includes a three-terminal all-pass network structure, wherein the first port and the second port of the all-pass network structure serve as the input and output of the 22.5° phase shift unit respectively, and the first port and the second port are connected to each other through a capacitor, and the third port of the all-pass network structure is electrically connected to a FET tube and a capacitor, the other end of the capacitor is grounded, and the other end of the FET tube is electrically connected to another capacitor and then grounded; The 22.5° phase-shift module includes two groups of inductors, which are electrically connected to the first port and the second port of the full-pass network structure respectively, and a FET tube and a capacitor are connected in series between the two groups of inductors.

5. The ultra-wideband digitally controlled phase shifter according to claim 4, characterized in that: The working states of the FET tube in the 22.5° base state module and the FET tube in the 22.5° phase shift state module are opposite; When the FET tube in the 22.5° base state module is turned on and the FET tube in the 22.5° phase shift module is turned off, the 22.5° phase shift unit is in the base state; When the FET tube in the 22.5° base state module is turned off and the FET tube in the 22.5° phase shift module is turned on, the 22.5° phase shift unit is in the phase shift state.

6. The ultra-wideband digitally controlled phase shifter according to claim 1, characterized in that: The all-pass network structure is two mutually coupled inductors, the first end and the end of the two inductors are electrically connected to the first port and the second port of the all-pass network structure respectively, and the remaining two ends of the two inductors are connected in series and electrically connected to the third port of the all-pass network structure; The switch unit comprises two FET tubes connected in series, one end of the two FET tubes is electrically connected to the third port of the switch unit, the remaining end of one of the FET tubes is electrically connected to the second port of the switch unit, and the remaining end of the other FET tube is electrically connected to the input end of the adjustment structure; The switch unit also includes two groups of selection structures, all of which are FET tubes, one end of the FET tube of the selection structure is electrically connected to the second port of the switch unit and the input end of the adjustment structure, respectively, and the other end is grounded; the adjustment structure includes at least two groups of adjustment branches, each group of adjustment branches includes a first control element and a second control element connected in series with each other, a capacitor is connected in series between the first control element and the second control element, the other end of the first control element is electrically connected between the first control element and the capacitor of another adjacent group of adjustment branches, the other end of the second control element is electrically connected to the third port of the switch unit, a third control element is electrically connected between the first control element and the capacitor, the other end of the third control element is electrically connected between the capacitor and the second control element of another adjacent group of adjustment branches, the other end of the third control element in the outermost adjustment branch is grounded, and the side of the first control element in the outermost adjustment branch away from the capacitor is used as the input end.

7. The ultra-wideband digitally controlled phase shifter according to claim 6, characterized in that: The first control element, the second control element and the third control element are all FET tubes, and the working states of the two selection structures are opposite; When the FET tube of the selection structure near the second port of the switch unit is turned on, and the FET tube of the selection structure near the third port of the switch unit is turned off, the 45° phase shift unit, the 90° phase shift unit, and the 180° phase shift unit are all in the ground state; When the FET tube of the selection structure near the second port of the switch unit is turned off and the FET tube of the selection structure near the third port of the switch unit is turned on, the 45° phase shift unit, the 90° phase shift unit and the 180° phase shift unit are all in phase shift state.

8. An ultra-wideband digitally controlled phase shifting method, characterized in that: The ultra-wideband digitally controlled phase shifting method is applicable to the ultra-wideband digitally controlled phase shifter according to claim 7, and the specific steps include: S1: Calculate the capacitance value of the 180° phase shift unit in the phase shifter when it switches to the phase shift state; S2: adjusting the working states of the first control element, the second control element, and the third control element in each group of regulating branches, and obtaining corresponding equivalent capacitance values ​​by changing the connection relationship of capacitors in different regulating branches; S3: Adjust the working state of each phase shifting unit in the phase shifter to complete the phase adjustment of the input signal.

9. An ultra-wideband digital control receiver, characterized in that: The ultra-wideband digitally controlled receiver includes the ultra-wideband digitally controlled phase shifter as described in any one of claims 1 to 7, and the ultra-wideband digitally controlled receiver also includes an array antenna, which is electrically connected to the ultra-wideband digitally controlled phase shifter and is used to receive signals of different phases and send them to the ultra-wideband digitally controlled phase shifter for phase adjustment.

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