Miniaturized reconfigurable filtering power divider with adjustable frequency and insertion phase, power divider structure and electronic equipment

Abstract

The invention relates to the technical field of microwaves, in particular to a frequency and insertion phase adjustable miniaturized reconfigurable filtering power divider, a power divider structure and electronic equipment. Each output path is arranged between the resonance unit and the radio frequency output end of the power divider, and the filter circuit is arranged between the radio frequency input end of the power divider and the resonance unit, so that the overall architecture design of the power divider is completed; meanwhile, a non-resonance point unit used for adjusting the phase of the output path is arranged in the output path, and the resonance unit and an impedance conversion unit arranged in the output path are utilized to perform regulation and control when the phase of the output path is adjusted by the non-resonance point unit, so that the output path maintains a fixed transmission response; the integration of a filtering function, a power distribution function and a phase shift function in the overall architecture of the power divider is realized, an additional matching network is not needed, and the system complexity is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of microwave technology, and in particular to a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase, a power divider structure, and an electronic device. Background Art

[0002] In radio frequency (RF) communication front-ends and phased array radar systems, power dividers are key components in the phased array antenna array feed network, functioning to feed the phased array antenna array sub-units. Similarly, filters and phase shifters responsible for adjusting the feed phase of each sub-unit in a phased array system are also crucial RF devices for achieving beam scanning. To achieve miniaturization, lightweighting, and low cost in phased array feed network architectures, functionally integrated devices combining multiple RF signal characteristics are highly favored.

[0003] However, in traditional RF front-end systems, power dividers, filters, and phase shifters are used and operate in a cascaded manner. In this functional coordination mode, the cascading of a large number of discrete components and the complex matching networks between these components result in extremely high system complexity for the aforementioned integrated functional devices. This poses a serious obstacle to the increasingly miniaturized, lightweight, and low-cost phased array feed network architecture. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a miniaturized reconfigurable filter power divider, power divider structure, and electronic device with adjustable frequency and insertion phase. By coordinating the design of the filter, power divider, and phase shifter, the functions of the filter, power divider, and phase shifter can be realized independently without the need for additional matching networks, thus greatly reducing system complexity.

[0005] In a first aspect, the present invention provides a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase, comprising: Filtering circuit; Phase shifting circuit; The phase-shifting circuit includes a resonant unit and at least two output paths. The first end of each of the at least two output paths is connected to the resonant unit, and the second end of each output path is connected to at least two RF outputs of the reconfigurable filter power divider. The output path includes an impedance transformation unit and a non-resonant point unit. The non-resonant point unit is used to adjust the phase of the output path, and the resonant unit and the impedance transformation unit are used to regulate the output path when the non-resonant point unit adjusts the phase of the output path so that the output path maintains a fixed transmission response. The first end of the filter circuit is connected to the RF input of the reconfigurable filter power divider, and the second end of the filter circuit is connected to the resonant unit.

[0006] Furthermore, in this invention, the first end of the impedance transformation unit is connected to the resonant unit, the second end of the impedance transformation unit is connected to the radio frequency output terminal, the first end of the non-resonant point unit is connected to the second end of the impedance transformation unit, and the second end of the non-resonant point unit is grounded.

[0007] Furthermore, in this invention, the resonant unit is an LC resonator.

[0008] Furthermore, in this invention, the LC resonator is a parallel LC resonator.

[0009] Furthermore, in this invention, the impedance transformation unit is a J-converter.

[0010] Furthermore, in this invention, the filtering circuit includes a multi-order bandpass filter and a coupling unit; The first end of the multi-order bandpass filter is connected to the RF input, the second end of the multi-order bandpass filter is connected to the first end of the coupling unit, and the second end of the coupling unit is connected to the resonant unit.

[0011] Furthermore, in this invention, the reconfiguration filter power divider also includes an isolation unit; An isolation unit is placed between each RF output terminal to isolate each RF output terminal.

[0012] Furthermore, in this invention, the isolation unit includes at least one isolation resistor.

[0013] Secondly, the present invention provides a power divider structure, comprising: Substrate layer; Protective layer; And a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase as described in the first aspect, the reconfigurable filter power divider being disposed between a substrate layer and a protective layer.

[0014] Thirdly, the present invention provides an electronic device comprising a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase as described in the first aspect.

[0015] The beneficial effects of this invention are reflected in the following: by setting up a filter circuit and a phase-shifting circuit including a resonant unit and at least two output paths, the first end of at least two output paths is connected to the resonant unit, and the second end of each output path is connected one-to-one with at least two RF output terminals of the reconfigurable filter power divider. The filter circuit is set between the RF input terminal of the reconfigurable filter power divider and the resonant unit, thus completing the overall architecture design of the power divider that is miniaturized, lightweight, and low-cost. At the same time, the discrete components in the overall architecture of the power divider are designed collaboratively. A non-resonant point unit for adjusting the phase of the output path is set in the output path, and the impedance transformation unit set in the output path is used to regulate the output path when the phase of the output path is adjusted by the non-resonant point unit, so that the output path maintains a fixed transmission response. This realizes the integration of the filtering function of the filter circuit, the power distribution function of the power divider, and the phase-shifting function of the phase-shifting circuit in the overall architecture of the power divider, and no additional matching network is required between them. Compared with traditional functional integration devices based on cascaded collaboration, this greatly reduces the system complexity and can meet the requirements of miniaturization, lightweighting, and low cost of phased array feed network architecture. Attached Figure Description

[0016] Figure 1 This is one of the structural schematic diagrams of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention; Figure 2 This is a second schematic diagram of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention. Figure 3 The third schematic diagram of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention; Figure 4 The fourth schematic diagram of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention; Figure 5 This is a schematic diagram of the phase-shifting circuit and reference circuit of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention. Figure 6 The fifth schematic diagram of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention; Figure 7 A schematic diagram of the overall circuit structure of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention; Figure 8 A schematic diagram of the physical circuit of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention. Figure 9 A schematic diagram of the S-parameter passband test results for a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention; Figure 10 A schematic diagram of phase parameter test results for a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention; Figure 11 This is a physical diagram of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention.

[0017] Figure labels: 10, filter circuit; 20, phase shifting circuit; 21, resonant unit; 22, impedance transformation unit; 23, non-resonant point unit. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] The following disclosure provides numerous different embodiments or examples to implement different features of the provided subject matter. Specific examples of components and arrangements are described below to simplify this disclosure. Of course, these are merely examples and are not intended to be limiting. For example, in the following description, the formation of a first feature on or on a second feature may include embodiments where the first and second features are in direct contact, and may also include embodiments where additional features may be formed between the first and second features such that the first and second features may not be in direct contact. Furthermore, reference numerals and / or letters may be repeated in various instances of this disclosure. This repetition is for the purpose of simplicity and clarity and does not inherently define the relationship between the various embodiments and / or configurations discussed.

[0020] As described in the background section, the inventors discovered that in traditional RF front-end systems, power dividers, filters, and phase shifters are used and operate collaboratively through cascading. In this functional collaboration mode, the cascading of numerous discrete components and the complex matching networks between them result in significant system complexity for the aforementioned integrated devices with multiple RF signal characteristics. This severely hinders the increasingly miniaturized, lightweight, and low-cost phased array feed network architecture.

[0021] Based on this, embodiments of the present invention propose a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase, a power divider structure, and an electronic device. The miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase utilizes a filter circuit and a phase-shifting circuit including a resonant unit and at least two output paths. The first terminals of the at least two output paths are connected to the resonant unit, and the second terminals of each output path are connected one-to-one to at least two RF output terminals of the reconfigurable filter power divider. The filter circuit is positioned between the RF input terminal and the resonant unit of the reconfigurable filter power divider, thus achieving a miniaturized, lightweight, and low-cost overall power divider architecture design. Simultaneously, the overall architecture of the power divider... The discrete components in the power divider are designed collaboratively. A non-resonant point unit is set in the output path to adjust the phase of the output path. The phase of the output path is adjusted by the non-resonant point unit using the resonant unit and the impedance transformation unit in the output path, so that the output path maintains a fixed transmission response. This realizes the integration of the filtering function of the filter circuit, the power distribution function of the power divider, and the phase shifting function of the phase shifting circuit in the overall architecture of the power divider. No additional matching network is required between them. Compared with traditional functional integration devices based on cascade collaboration, the system complexity is greatly reduced, which can meet the requirements of miniaturization, lightweighting and low cost of phased array feed network architecture.

[0022] In a first aspect, the present invention provides a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase. Figure 1 This is a schematic diagram of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to an embodiment of the present invention. (Refer to...) Figure 1 In this embodiment, the miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase includes: Filter circuit 10; Phase shifting circuit 20; The phase-shifting circuit 20 includes a resonant unit 21 and at least two output paths. The first end of each of the at least two output paths is connected to the resonant unit 21, and the second end of each output path is connected to at least two RF outputs of the reconfigurable filter power divider. The output paths include an impedance transformation unit 22 and a non-resonant point unit 23. The non-resonant point unit 23 is used to adjust the phase of the output path. The resonant unit 21 and the impedance transformation unit 22 are used to regulate the output path when the non-resonant point unit 23 adjusts the phase of the output path so that the output path maintains a fixed transmission response. The first end of the filter circuit 10 is connected to the RF input of the reconfigurable filter power divider, and the second end of the filter circuit 10 is connected to the resonant unit 21.

[0023] It is understood that the reconfigurable filter power divider refers to the miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase described in the embodiments of the present invention. In this reconfigurable filter power divider, the RF input terminal (Port 1) is used to receive the input signal, and each RF output terminal (such as Port 2, Port 3) is used to output the signal of the corresponding output path. The filter circuit 10 is used to filter signals within a specific frequency range, suppressing noise and other unwanted signals, and adjusting the frequency response of the signal to meet the needs of specific applications.

[0024] The phase-shifting circuit 20 is used to adjust the feed phase of each output path of the reconfigurable filter power divider. In an embodiment of the present invention, the phase-shifting circuit 20 consists of a resonant unit 21 and at least two output paths, each of which is provided with an impedance transformation unit 22 and a non-resonant point unit 23. The non-resonant point unit 23 refers to a circuit unit operating at a non-resonant frequency, which utilizes the phase characteristics of the circuit at the non-resonant frequency to achieve phase shifting of the signal, i.e., phase shifting. It is understood that when the non-resonant point unit 23 is used to adjust the phase of its output path, the signal amplitude on that output path will change, i.e., the transmission response of that output path will change. To maintain a fixed transmission response for that output path, this embodiment of the present invention utilizes the impedance transformation unit 22 and the resonant unit 21 to regulate the output path when the non-resonant point unit 23 adjusts the phase. Specifically, it adjusts the resonant frequency of the resonant unit 21 and adjusts the impedance transformation unit 22 to change the output impedance of the output path until the signal amplitude on the output path returns to its original value.

[0025] Therefore, the present invention integrates the filtering function of the filter circuit 10, the power distribution function of the power divider, and the phase shifting function of the phase shifting circuit 20 in the reconfigurable filter power divider, and does not require an additional matching network between them. Compared with traditional cascaded collaborative functional integration devices, it greatly reduces the system complexity and can meet the requirements of miniaturization, lightweighting and low cost of phased array power supply network architecture.

[0026] Meanwhile, the reconfigurable filter power divider in this embodiment of the invention adopts a single filter circuit 10 architecture, which is simple, easy to implement, and has the characteristic of expanding multiple output paths.

[0027] It should be noted that frequency reconfigurability refers to the ability of the power divider in this embodiment of the invention to change its operating frequency parameters during operation, so that the power divider in this embodiment of the invention can adapt to different operating adjustments, standards and requirements, thereby improving its availability in wireless communication and signal processing applications.

[0028] Furthermore, referring to Figure 2In some embodiments, the first end of the impedance transformation unit 22 is connected to the resonant unit 21, the second end of the impedance transformation unit 22 is connected to the radio frequency output terminal, the first end of the non-resonant point unit 23 is connected to the second end of the impedance transformation unit 22, and the second end of the non-resonant point unit 23 is grounded.

[0029] The non-resonant unit 23 can be any circuit unit containing inductors and capacitors that does not operate at its resonant frequency. For example, the non-resonant unit 23 can be an RLC circuit (resistor-inductor-capacitor circuit) whose operating frequency is not the resonant frequency. This RLC circuit is a series or parallel circuit composed of resistors, inductors, and capacitors. In a series RLC circuit, the non-resonant frequency is lower or higher than the resonant frequency; in a parallel RLC circuit, the non-resonant frequency is typically higher than the resonant frequency.

[0030] In addition, the resonant unit 21 in the reconfigurable filter power divider can be a resonator composed of units such as capacitors, inductors, and resistors, such as LC resonators, CR resonators, LR resonators, or crystal resonators, ceramic resonators, etc.

[0031] Optionally, in some embodiments, the resonant unit 21 is an LC resonator.

[0032] An LC resonator (Inductor-Capacitor Resonator) is a circuit composed of an inductor and a capacitor that can store and release energy at a specific frequency, known as the resonant frequency. The LC resonator operates based on electromagnetic oscillation. Under ideal conditions (without resistance or other losses), the magnetic field energy in the inductor and the electric field energy in the capacitor repeatedly convert between each other, creating a continuous oscillation process.

[0033] Understandably, while crystal resonators and ceramic resonators offer high frequency stability and accuracy, they are often large, heavy, and expensive, failing to meet the requirements of miniaturization, lightweight design, and low cost for phased array feed network architectures. Furthermore, CR and LR resonators are more suitable for low-frequency resonant circuits, which do not match the operating frequency range of phased array feed network architectures. Therefore, this embodiment of the invention uses an LC resonator as the resonant unit 21, enabling it to operate at higher frequencies, and the tunable frequency range is more suitable for the RF and microwave frequency ranges of the phased array feed network architecture. Moreover, compared to other types of resonators, LC resonators have lower cost and smaller size, and are easier to integrate onto printed circuit boards (PCBs).

[0034] Optionally, refer to Figure 3 In some embodiments, the LC resonator is a parallel LC resonator.

[0035] It is understood that LC resonators are divided into parallel LC resonators and series LC resonators. This invention employs a parallel LC resonator, which reduces signal transmission loss and allows for a wider bandwidth design, making it more suitable for signal processing applications in power dividers.

[0036] Optionally, refer to Figure 4 In some embodiments, the impedance transformation unit 22 is a J-converter.

[0037] It is understood that the impedance transformation unit 22 is a component or circuit in the reconfigurable filter power divider used to change the impedance matching between the signal source and the load. It can be of various types, such as a J-converter, a π-type network, a T-type network, and an impedance matching network. This embodiment of the invention uses a J-converter as the impedance transformation unit 22. Compared to other types of impedance transformation units 22, only a small number of capacitors and inductors are needed to achieve the impedance transformation function, making the overall circuit of the reconfigurable filter power divider of this embodiment simpler, more compact, and with lower cost and easier integration. Furthermore, the J-converter is suitable for a wide frequency range, especially in RF and microwave applications of phased array feed network architectures. Therefore, the use of a J-converter as the impedance transformation unit 22 in this embodiment of the invention better meets the requirements of miniaturization, lightweight design, and low cost for phased array feed network architectures.

[0038] Furthermore, in some embodiments, the phase of the J-converter selected for the impedance transformation unit 22 is +90°. It is understood that the phase of the J-converter is determined by its coupling type; different electromagnetic couplings will determine different phases, and all J-converters here are electrically coupled.

[0039] Figure 1-4 The circuit structure of the miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase shown can be viewed as a cascade of a filter circuit 10 and a multi-channel phase shifting circuit 20. This embodiment of the invention uses two-channel phase shifting circuits 20 (i.e., two output paths) as an example for analysis, explaining the phase shifting function of this reconfigurable filter power divider. Figure 5 The circuit structure of a phase-shifting circuit 20 with two output paths and its corresponding reference circuit, according to an embodiment of the present invention, is shown. Figure 5 (Right figure) shows a phase-shifting circuit 20 with two output paths according to an embodiment of the present invention. Figure 5 (Left figure) is the reference circuit. According to... Figure 5It can be seen that the reference circuit is a basic circuit formed by removing the non-resonant unit 23 (denoted as jbs and jbss) from the phase-shifting circuit 20 containing two output paths. That is, the two output paths of the reference circuit have no additional phase shift; their insertion phase φ0 is determined by the J-converter in their output paths. Compared to the reference circuit, the two output paths of the phase-shifting circuit 20 have additional phase shifts φshift1 and φshift2. Simultaneously, the first output path of the reference circuit has the same transmission coefficient as the first output path of the phase-shifting circuit 20. Therefore, based on... Figure 5 The circuit structure shown utilizes the fact that the output path of the phase-shifting circuit 20 has the same transmission coefficient as the corresponding output path in the reference circuit. This allows for the construction of a mathematical relationship between the reference circuit and the phase-shifting circuit 20. Through formula derivation, when the output path of the phase-shifting circuit 20 requires adjustment of the non-resonant point units 23 (denoted as jbs and jbss respectively) to increase the additional phase shift, other circuit parameter variables in the phase-shifting circuit 20 can be solved. More specifically, through formula derivation, the analytical expressions for each circuit parameter variable include: ; ; in: ; ; Where ω0 is the resonant frequency of the resonant unit 21 in the reference circuit, Zl is the load impedance of the circuit, and Zs is the source impedance of the circuit (input impedance of the phase-shifting circuit 20). Based on the above formula, all unknown parameters of the phase-shifting circuit 20 can be obtained from the known parameters of the reference circuit. This allows for the determination of the specific parameters of the impedance transformation unit 22 (J-converter) and the resonant unit 21 (parallel LC resonator) on the output path based on the actual phase shift when adjusting the phase of the output path using the non-resonant point unit 23. The J-converter and the resonant unit 21 can then be adjusted based on these obtained parameters to maintain a fixed transmission response while providing an additional phase shift in the output path. Thus, this embodiment of the invention achieves the integration of phase-shifting functionality and also demonstrates that by… Figure 1-4 The circuit in the circuit can adjust the resonant frequencies of each non-resonant point unit 23, impedance transformation unit 22 (J converter), and resonant unit 21, so that the phase can be changed arbitrarily without affecting the amplitude change.

[0040] It is worth noting that, based on the above formula and combined with Figure 5It is known that the source impedance Zs of the phase-shifting circuit 20 does not exist in the formula and will not affect the phase-shifting function of the phase-shifting circuit 20. Therefore, the source impedance Zs of the phase-shifting circuit 20 can be any value, that is, the filter circuit 10 can be any structured circuit with filtering function. This also confirms that the power divider of the present invention has a flexible architecture and reconfigurable characteristics. The present invention can integrate the phase-shifting function into the power divider in a miniaturized topology under various filtering architectures.

[0041] Optionally, in some embodiments, the filter circuit 10 includes a multi-order bandpass filter and a coupling unit.

[0042] In this embodiment, the first end of the multi-order bandpass filter is connected to the RF input terminal, the second end of the multi-order bandpass filter is connected to the first end of the coupling unit, and the second end of the coupling unit is connected to the resonant unit 21. This embodiment of the invention incorporates a multi-order bandpass filter in the filter circuit 10. By combining different bandpass filters, filtering of signals in different frequency ranges can be achieved, resulting in a more flexible frequency response. Furthermore, it improves the performance of the filter circuit 10 and the robustness of the reconfigurable filter power divider in this embodiment of the invention.

[0043] It is understandable that, assuming the multi-order bandpass filter is an nth-order bandpass filter, it can be connected to the resonant unit 21 through the coupling unit to jointly form an (n+1)th-order bandpass filter. For example, as... Figure 6 As shown, the multi-order bandpass filter is a second-order bandpass filter. The second-order bandpass filter is connected to the resonant unit 21 through the coupling unit to form a third-order bandpass filter.

[0044] Furthermore, in some embodiments, each order of the multi-order bandpass filter includes a coupling unit and a parallel LC resonator. (Refer to...) Figure 6 For example, the coupling unit J of the first-order bandpass filter 01 The first end is connected to the RF input terminal, serving as an external input coupler, coupling unit J 01 The second end is connected to the parallel LC resonator of the first-order bandpass filter and the coupling unit J of the second-order bandpass filter, respectively. 12 The first end is connected to the coupling unit J. 12 The second end is connected to the parallel LC resonator and coupling unit J of the second-order bandpass filter, respectively. 23 The first end is connected to the coupling unit J. 23 The second end is connected to the resonant unit 21. Coupling unit J12 and coupling unit J... 23 for Figure 6 The interstage coupling of the third-order bandpass filter is shown.

[0045] Furthermore, in some embodiments, the coupling unit J 01 Coupled unit J12 and coupling unit J 23 These are J-converters, and each J-converter has a phase of +90°. It is understandable that the phase of a J-converter is determined by its coupling type; different electromagnetic couplings will result in different phases. All J-converters here are electrically coupled.

[0046] Furthermore, in some embodiments, the interstage coupling of the multi-order bandpass filter is a varactor diode.

[0047] Optionally, in some embodiments, the miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase also includes an isolation unit.

[0048] The isolation unit is located between each RF output terminal to isolate each RF output terminal.

[0049] It is understandable that in a multi-output circuit structure, if there is no isolation between the output ports connected to each output path, the output paths will often interfere with each other, reducing the stability of the output signal. Therefore, in this embodiment of the invention, an isolation unit is placed between each RF output terminal. By creating a voltage drop between each RF output terminal, the signal current between each RF output terminal is prevented from flowing into the other's output terminal, reducing the mutual interference between RF output terminals, making the circuit output more stable, and improving the isolation between RF output terminals.

[0050] Furthermore, in some embodiments, the isolation unit includes at least one isolation resistor.

[0051] It is understood that, by setting at least one isolation resistor and utilizing the voltage drop characteristic of at least one resistor, the embodiments of the present invention prevent signal currents between RF output terminals from flowing into each other's output terminals, reduce mutual interference between RF output terminals, make the circuit output more stable, and improve the isolation between RF output terminals.

[0052] Figure 7 A circuit diagram of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to a specific embodiment of the present invention is shown. (Refer to...) Figure 7 The circuit structure of this reconfigurable filter power divider can be divided into a cascaded filter circuit and a cascaded two-way phase-shifting circuit based on reference plane AA'. Based on reference plane BB', it can be divided into a third-order bandpass filter (three parallel LC resonators represented by R1, R2, and R3) and an external coupling circuit. The circuit structure is described based on reference plane AA', where Zs' is the source impedance at the RF input, and Zin = Zs is the input impedance of the two-way phase-shifting circuit. As mentioned above, Zs does not affect the phase-shifting function of the phase-shifting circuit. The filter circuit includes a second-order bandpass filter and a coupling unit J. 23In a second-order bandpass filter, each order includes a coupling unit and a parallel LC resonator. The coupling unit J... 01 The first end is connected to the RF input terminal, serving as an external input coupler, coupling unit J 12 and coupling unit J 23 This refers to the interstage coupling of a bandpass filter.

[0053] For the phase-shifting circuit, the resonant unit is a parallel LC resonator. Both output paths include impedance transformation units (J1, J2) and non-resonant point units (jbs, jbss) located at the RF output terminal. Zl is the output impedance (load impedance) at the RF output terminal.

[0054] Coupled unit J 01 Coupled unit J 12 Coupled unit J 23 The impedance transformation unit in each output path is a J-converter, and the phase of each J-converter is +90°.

[0055] Figure 8 This diagram illustrates the physical circuitry of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention. This physical circuitry corresponds to... Figure 7 The reconfigurable filter power divider circuit structure is shown. (Refer to...) Figure 8 This physical circuit is a verification circuit designed using microstrip line technology. Specifically, it uses a Rogers 6010 dielectric substrate (1.27mm thick, dielectric constant 10.2), and the overall circuit area is 38mm × 41mm. The designed circuit mainly consists of three half-wavelength resonators, namely resonators R1, R2, and R3. Each resonator has a varactor diode C1, C2, and C3 loaded at its center to control the resonant frequency. The interstage coupling between adjacent resonators, i.e., the interstage coupling coefficients of R1R2 and R2R3, are mainly determined by C1R2 and C3. 12 and C 23 Adjustment is made by back-to-back variable capacity tubes. C s External quality factor used to control the RF input (Port1) of the power divider filter; while C L1 、C L2 The external quality factor of the two RF output terminals (Port 2 and Port 3) is controlled separately, and the non-resonant point of each output port, i.e., the capacitor C to ground, is located at the non-resonant point of each output port. nrn1 、C nrn2 And a 0.6nH inductor connected in series with it is used to achieve phase adjustment of the output signal of each RF output terminal.

[0056] The embodiments of the present invention are based on Figure 8The verification circuit shown was tested in detail, and the S-parameter test results and phase test results of the reconfigurable filter power divider were obtained respectively. Figure 9 , 10 As shown.

[0057] Figure 9 The S-parameter test results are for a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase, as shown in a specific embodiment of the present invention. (Refer to...) Figure 9 ,in, Figure 9 Figure 9 (left) and Figure 9 (right) show the transmission coefficient test results of the reconfigurable filter power divider at center frequencies of 1.25 GHz and 1.16 GHz, respectively, with the amplitude response of the two RF outputs being consistent. Figure 10 Figure 10 (left) and Figure 10 (right) show the phase test results of the reconfigurable filter power divider at center frequencies of 1.25 GHz and 1.16 GHz, respectively. The phase difference between the two RF outputs can vary within 180°.

[0058] Figure 11 This is a physical diagram of a specific embodiment of a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase provided by the present invention. (Refer to...) Figure 11 As can be seen from the comparison between the physical image and the coin, as well as the foregoing content, the reconfigurable filter power divider of the present invention has the advantages of miniaturization, lightweight and low cost, and can meet the requirements of the phased array power supply network architecture.

[0059] In summary, the embodiments of the present invention, by setting up a filter circuit and a phase-shifting circuit including a resonant unit and at least two output paths, connect the first end of at least two output paths to the resonant unit, and connect the second end of each output path to at least two RF outputs of the reconfigurable filter power divider. The filter circuit is placed between the RF input of the reconfigurable filter power divider and the resonant unit, thus completing the overall architecture design of a miniaturized, lightweight, and low-cost power divider. At the same time, the discrete components in the overall architecture of the power divider are designed collaboratively. A non-resonant point unit for adjusting the phase of the output path is set in the output path, and the phase transformation unit set in the output path is used to regulate the output path when the phase of the output path is adjusted by the resonant unit and the impedance transformation unit set in the output path, so that the output path maintains a fixed transmission response. This realizes the integration of the filtering function of the filter circuit, the power distribution function of the power divider, and the phase-shifting function of the phase-shifting circuit in the overall architecture of the power divider, and no additional matching network is required between them. Compared with traditional functional integration devices based on cascaded collaboration, this greatly reduces the system complexity and can meet the requirements of miniaturization, lightweighting, and low cost of phased array feed network architecture.

[0060] Secondly, embodiments of the present invention provide a power divider structure, including: Substrate layer; Protective layer; And a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase as described in the first aspect, the reconfigurable filter power divider being disposed between a substrate layer and a protective layer.

[0061] Thirdly, the present invention provides an electronic device comprising a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase as described in the first aspect.

[0062] In the description of the embodiments of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "center," "top," "bottom," "top," "bottom," "inner," "outer," "inner side," and "outer side," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. "Inner side" refers to the interior or enclosed area or space. "Outer perimeter" refers to the area surrounding a specific component or specific area.

[0063] In the description of embodiments of the present invention, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise stated, "a plurality of" means two or more.

[0064] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "assembly" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in the present invention based on the specific circumstances.

[0065] In the description of embodiments of the present invention, specific features, structures, materials or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0066] In the description of the embodiments of the present invention, it should be understood that "-" and "~" represent a range of two numerical values, and this range includes the endpoints. For example, "AB" represents a range greater than or equal to A and less than or equal to B. "A~B" represents a range greater than or equal to A and less than or equal to B.

[0067] In the description of embodiments of the present invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0068] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase, characterized in that, include: Filtering circuit; Phase shifting circuit; The phase-shifting circuit includes a resonant unit and at least two output paths. The first end of each of the at least two output paths is connected to the resonant unit, and the second end of each output path is connected to at least two RF outputs of the reconfigurable filter power divider. Each output path includes an impedance transformation unit and a non-resonant point unit. The non-resonant point unit is used to adjust the phase of the output path. The resonant unit and the impedance transformation unit are used to regulate the output path when the non-resonant point unit adjusts the phase of the output path, so that the output path maintains a fixed transmission response. The first end of the filter circuit is connected to the RF input terminal of the reconfigurable filter power divider, and the second end of the filter circuit is connected to the resonant unit.

2. The miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to claim 1, characterized in that, The first end of the impedance transformation unit is connected to the resonant unit, the second end of the impedance transformation unit is connected to the radio frequency output terminal, the first end of the non-resonant point unit is connected to the second end of the impedance transformation unit, and the second end of the non-resonant point unit is grounded.

3. The miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to claim 2, characterized in that, The resonant unit is an LC resonator.

4. The miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to claim 3, characterized in that, The LC resonator is a parallel LC resonator.

5. The miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to claim 2, characterized in that, The impedance transformation unit is a J-type converter.

6. The miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to claim 1, characterized in that, The filtering circuit includes a multi-order bandpass filter and a coupling unit; The first end of the multi-order bandpass filter is connected to the radio frequency input terminal, the second end of the multi-order bandpass filter is connected to the first end of the coupling unit, and the second end of the coupling unit is connected to the resonant unit.

7. The miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to claim 1, characterized in that, It also includes isolation units; The isolation unit is disposed between each of the radio frequency output terminals and is used to isolate each of the radio frequency output terminals.

8. The miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase according to claim 7, characterized in that, The isolation unit includes at least one isolation resistor.

9. A power divider structure, characterized in that, include: Substrate layer; Protective layer; And a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase as described in any one of claims 1-8, wherein the reconfigurable filter power divider is disposed between the substrate layer and the protective layer.

10. An electronic device, characterized in that, The electronic device includes a miniaturized reconfigurable filter power divider with adjustable frequency and insertion phase as described in any one of claims 1-8.

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