Non-magnetic active isolator and electronic equipment
By using two-stage amplifier circuits and compactly arranged directional couplers in MNM cells, the problems of insufficient bandwidth and large layout area of traditional MNM cells are solved, bandwidth improvement and area saving are achieved, and are suitable for the field of broadband communications.
Patent Information
- Application Number
- CN202310861728.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-13
- Publication Date
- 2025-01-14
AI Technical Summary
Due to the small bandwidth and large layout area, traditional MNM units cannot be suitable for actual products, especially in the case of broadband systems and limited chip area.
The phase shifter is designed with a cascading two-stage amplifier circuit, and the long microstrip lines are eliminated. The directional coupler with a compact layout is adopted to achieve bandwidth improvement and area savings for magnetically-free active isolators.
The bandwidth coverage of magnetically-free active isolators is improved, the layout area is reduced, the needs of the broadband communication field are met, and the multi-stage MNM cells are cascaded in the limited chip area, reducing costs.
Smart Images
Figure CN119315237A_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of power electronics technology, and in particular to non-magnetic active isolators and electronic devices. Background Art
[0002] At present, the traditional MNM (Magnetless Nonreciprocal Metamaterials) unit achieves high linearity and low insertion loss of non-reciprocal non-magnetic active isolators based on weak coupling and loop resonance, but it still has limitations such as small bandwidth and large layout area, which makes it impossible to apply to actual products. Summary of the invention
[0003] The main purpose of the embodiments of the present application is to provide a non-magnetic active isolator and an electronic device, aiming to improve the bandwidth coverage of the MNM unit and reduce its layout area so that it can be applied to actual products.
[0004] To achieve the above object, an embodiment of the present application provides a non-magnetic active isolator, the non-magnetic active isolator comprising:
[0005] A phase shifter, the phase shifter comprising at least two stages of amplifier circuits, the output end of the amplifier circuit of the previous stage is connected to the input end of the amplifier circuit of the next stage, the input end of the amplifier circuit of the first stage is the input end of the phase shifter, and the output end of the amplifier circuit of the last stage is the output end of the phase shifter;
[0006] A directional coupler, wherein the directional coupler adopts a compact layout design, and comprises a coupling line and a through line, wherein one end of the coupling line is directly connected to the input end of the phase shifter, and the other end of the coupling line is directly connected to the output end of the phase shifter, and the through line is arranged in parallel with the coupling line, and the through line and the coupling line are microstrip lines for transmitting signals.
[0007] In addition, to achieve the above-mentioned purpose, an embodiment of the present application further provides an electronic device, which includes the non-magnetic active isolator as described above.
[0008] The embodiment of the present application proposes a non-magnetic active isolator and electronic device, the non-magnetic active isolator includes: the phase shifter includes at least two stages of amplifier circuits, the output end of the amplifier circuit of the previous stage is connected to the input end of the amplifier circuit of the next stage, the input end of the amplifier circuit of the first stage is the input end of the phase shifter, and the output end of the amplifier circuit of the last stage is the output end of the phase shifter; a directional coupler, the directional coupler adopts a compact layout design, the directional coupler includes a coupling line and a straight-through line, one end of the coupling line is connected to the input end of the phase shifter, the other end of the coupling line is connected to the output end of the phase shifter, the straight-through line is arranged in parallel with the coupling line, and the straight-through line is used to transmit signals. The embodiment of the present application adopts a two-stage amplifier circuit to design a phase shifter, connects the directional coupler and the phase shifter without a microstrip line, and realizes a compact layout, which not only improves the bandwidth coverage, but also reduces the layout area, and has a high practical value. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the drawings required for use in the embodiments or the related technical descriptions are briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0010] Figure 1 It is a structural schematic diagram of a MNM unit in the related art;
[0011] Figure 2 It is a schematic diagram of the structure of multiple MNM units cascaded in the related art;
[0012] Figure 3 A schematic diagram of the structure of a non-magnetic active isolator provided in an embodiment of the present application;
[0013] Figure 4 A schematic structural diagram of another non-magnetic active isolator provided in an embodiment of the present application;
[0014] Figure 5 A schematic diagram of a cascade structure of a non-magnetic active isolator provided in an embodiment of the present application;
[0015] Figure 6 A schematic diagram of a concave layout structure of a non-magnetic active isolator provided in an embodiment of the present application;
[0016] Figure 7 A schematic diagram of the structure of an amplifier circuit in a non-magnetic active isolator provided in an embodiment of the present application;
[0017] Figure 8A schematic diagram of the structure of an electronic device provided in an embodiment of the present application.
[0018] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings.
[0019] Description of Figure Numbers:
[0020]
[0021] DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0023] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0024] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0025] It should also be understood that the references to "one embodiment" or "some embodiments" described in the specification of the embodiments of the present application mean that one or more embodiments of the embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Thus, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.
[0026] Non-reciprocal components, such as isolators, circulators, phase shifters, tunable resonators and tunable filters, play a vital role in modern microwave and optical applications, for example in communications, radar and sensor networks, where they have the potential to double network capacity at the physical layer while providing many other benefits at the network layer. Non-reciprocal components are almost exclusively implemented using magneto-optical materials, and despite extensive research in the optical and microwave fields, these materials still require permanent magnetic biasing for optimal performance and remain incompatible with commercial integrated circuit technology, making on-chip magnetic-free non-reciprocal technology essential.
[0027] A conventional non-magnetic active isolator with a non-magnetic non-reciprocal metamaterial embedded with an active transistor amplifier is shown in Figure 2. Figure 1 As shown in the figure, it is called the MNM unit. This structure achieves high linearity and low insertion loss based on weak coupling and loop resonance. The signal flows from right to left in the propagation direction, that is, when the signal propagates from port 2 to port 1, only a small amount of signal is coupled into the phase shifter ring due to weak coupling, so it exhibits low insertion loss during propagation; the signal flows from left to right in the isolation direction, that is, when the signal propagates from port 1 to port 2, the signal resonates in the loop, thereby effectively absorbing energy. The stronger the resonance, the better the isolation performance.
[0028] The condition for the loop to resonate is: |S 21 |<1,∠S 21 +∠T=2mπ(m is a positive real number); where S21 is the phase shifter loop gain, and T is the coupler propagation coefficient. The closer S21 is to 0dB, the closer the phase sum of the phase shifter loop and the coupler is to 2mπ, and the stronger the resonance is. In addition, when the loop gain S21>0dB, the resonance leads to self-excitation, and the MNM no longer works normally.
[0029] At present, the main problems of traditional MNM units are bandwidth and area. The bandwidth of traditional MNM units with a resonant frequency of 1.8 GHz can only reach 20 MHz at most, which is not suitable for broadband systems. In addition, the phase shifter ring in the MNM unit requires two 10 mm long microstrip lines, such as Figure 1 TL1 and TL2 in the chip take up a lot of space, and the coupler used is about 5 mm long. It is very difficult to arrange the two long microstrip lines with the coupler in the chip.
[0030] In addition, the traditional non-magnetic active isolator solution expands the bandwidth by cascading multiple MNM units, and the resonant frequency interval of each MNM unit is its own bandwidth, such as Figure 2 As shown, although this solution of cascading n MNM units can achieve multi-band isolation, it requires a larger area and is difficult to layout.
[0031] Therefore, the above MNM unit has obvious limitations in circuit application and limited area layout.
[0032] Based on this, the embodiments of the present application propose a non-magnetic active isolator and electronic device, which are improved based on the above-mentioned MNM unit: a cascaded two-stage single-tube amplifier is used as a phase shifter, so that the bandwidth is doubled, which meets the bandwidth coverage required in the current communication field and solves the problem that the traditional structure cannot be applied in practice due to insufficient bandwidth; the two 10mm long microstrips in the traditional structure are eliminated, which greatly saves area and reduces costs; it has the characteristics of a compact layout, so multiple stages of MNM units can be cascaded in a limited chip area to expand the bandwidth to meet commercial needs, and provides a feasible solution for designing non-magnetic active isolators that meet application indicators and exceed the performance of competitors' products.
[0033] The non-magnetic active isolator and electronic device provided in the embodiments of the present application are specifically described through the following embodiments. First, the non-magnetic active isolator provided in the embodiments of the present application is described.
[0034] The non-magnetic active isolator provided in this embodiment includes:
[0035] A phase shifter, the phase shifter comprising at least two stages of amplifier circuits, the output end of the amplifier circuit of the previous stage is connected to the input end of the amplifier circuit of the next stage, the input end of the amplifier circuit of the first stage is the input end of the phase shifter, and the output end of the amplifier circuit of the last stage is the output end of the phase shifter;
[0036] A directional coupler, the directional coupler comprising a coupling line and a through line, one end of the coupling line is directly connected to the input end of the phase shifter, the other end of the coupling line is directly connected to the output end of the phase shifter, the through line and the coupling line are arranged in parallel, and both the through line and the coupling line are microstrip lines for transmitting signals.
[0037] As an example, see Figure 3 , Figure 3 A schematic diagram of the structure of a non-magnetic active isolator provided in one embodiment of the present application is shown in FIG. Figure 3 As shown, the non-magnetic active isolator provided in this embodiment includes:
[0038] The phase shifter 11 includes a two-stage amplifier circuit, the output end of the first-stage amplifier circuit 01 is connected to the input end of the second-stage amplifier circuit 02, the input end of the first-stage amplifier circuit 01 is the input end of the phase shifter 11, and the output end of the second-stage amplifier circuit 02 is the output end of the phase shifter 11;
[0039] The directional coupler 22 includes a coupling line BC and a through line AD. One end of the coupling line BC is directly connected to the input end of the phase shifter 11, and the other end of the coupling line BC is directly connected to the output end of the phase shifter 11. The through line AD is arranged in parallel with the coupling line BC. Both the through line AD and the coupling line BC are microstrip lines for transmitting signals.
[0040] It should be noted that the phase shifter 11 includes at least two stages of amplifier circuits. Although the present embodiment is described by taking a two-stage amplifier circuit as an example, it is still applicable to a cascade of three or more stages of amplifier circuits. In the case where the phase shifter 11 includes two stages of amplifier circuits, the first-stage amplifier circuit 01 is the previous-stage amplifier circuit and the first-stage amplifier circuit, and the second-stage amplifier circuit 02 is the next-stage amplifier circuit and the final-stage amplifier circuit.
[0041] From the working principle of the traditional MNM unit in the relevant technology, it can be seen that its working bandwidth is the frequency when a strong resonance occurs. Therefore, it can be concluded from the resonance formula that if you want to widen the bandwidth, you need to widen the phase and the frequency range close to 2mπ. By analyzing the problem of the narrow bandwidth of the traditional MNM unit, the study found that it is mainly because two 10mm long microstrips (TL1 and TL2) are used in the phase shifter to modulate the phase of the phase shifter. The phase of the long microstrip itself changes quickly, resulting in a very narrow phase and frequency band near 2mπ. At the same time, the introduction of the long microstrip also makes it impossible to layout the structure in a limited area.
[0042] According to the above ideas, since the speed of phase change with frequency is strongly related to the microstrip line, it is possible to consider eliminating the use of long microstrips, so that the phase and curve can be made smoother, achieving the technical effect of expanding the bandwidth. At the same time, eliminating the long microstrip can not only increase the bandwidth while eliminating the parasitic effects of the long microstrip, but also save a lot of area and make it easier to layout, so that the phase shifter 11 and the directional coupler 22 are more compactly connected.
[0043] In this embodiment, in order to achieve the phase meeting the resonance requirement, two amplifier circuits are cascaded to replace the long microstrip to control the phase and, at the same time, the matching circuit in the amplifier circuit is reasonably designed so that the phase and gain meet the normal working requirements. Figure 3It can be seen that the phase shifter 11 uses a common-source-stage connected amplifier circuit as the main reason for the non-reciprocity. The input end of the first-stage amplifier circuit 01 is directly connected to the coupling line B end of the directional coupler 22, and the output end of the second-stage amplifier circuit 02 is directly connected to the coupling line C end of the directional coupler 22. There is no redundant microstrip line between the phase shifter 11 and the coupling line BC. It can be understood that since the coupling line BC and the through line AD are also microstrip lines, the coupling line BC is used to couple the signal transmitted in the through line AD. Therefore, even if the long microstrip line used to connect the phase shifter and the coupler in the related art is omitted, it does not affect the signal transmission between the phase shifter 11 and the directional coupler 22 in this embodiment.
[0044] As an example, the signal first enters the through line AD from port 1, and then is coupled to the loop formed by the coupling line BC and the phase shifter 11 through the through line AD. The signal resonates in the loop, thereby effectively absorbing energy.
[0045] As an example, the signal first enters the through line AD from port 2, and then is coupled to the loop composed of the coupling line BC and the phase shifter 11 through the through line AD. Due to weak coupling, only a small amount of signal is coupled into the phase shifter loop, so it exhibits low insertion loss during propagation.
[0046] The working principle of the non-magnetic active isolator proposed in this embodiment is basically the same as the MNM unit in the related art after the long microstrip is omitted, but the benefits brought include not only avoiding the problem of excessive phase change introduced by the long microstrip to improve the bandwidth, but also easier layout, saving a lot of area and compact features.
[0047] As an example, the traditional MNM unit and the non-magnetic active isolator proposed in the embodiment of the present application were simulated and verified by using the commercial simulation software ADS. The result is: the bandwidth of the traditional MNM unit with isolation greater than 10dB (that is, S12 less than -10dB) is 20MHz (1.79GHz~1.81GHz), while the bandwidth of the non-magnetic active isolator proposed in the embodiment of the present application is 39MHz (1.782GHz~1.821GHz). It can be seen that the bandwidth of the non-magnetic active isolator proposed in the embodiment of the present application is almost doubled that of the traditional MNM unit.
[0048] The embodiment of the present application proposes a non-magnetic active isolator, which uses a cascaded two-stage amplifier circuit to design a phase shifter, eliminating two 10mm long microstrips while satisfying the loop resonance condition, which not only improves the bandwidth, but also saves a lot of area, and the architecture is compact and easier to layout. At the same time, when designing a cascade structure based on a non-magnetic active isolator, only three stages of cascade are needed to make the bandwidth greater than 200MHz, which meets the application in the communication field, and the non-magnetic active isolator proposed in the embodiment of the present application is more suitable for chip layout with limited area than the traditional MNM unit.
[0049] Reference Figure 4 In some feasible embodiments, the phase shifter 11 is coupled to the coupling line via a microstrip line X of a preset length.
[0050] It can be understood that, although in the implementation manner provided in the above-mentioned embodiment of the present application, no additional microstrip line is required to connect the phase shifter 11 and the coupling line BC, corresponding adjustments can be made according to actual needs. In some application scenarios, a short microstrip line X with a preset length (for example, 1 mm, 2 mm, etc.) can be used to connect the phase shifter 11 and the coupling line BC. Although the most compact layout effect cannot be achieved, it still has certain advantages over the technical solution of using a 10 mm long microstrip line in the related art.
[0051] In some feasible embodiments, the directional coupler 22 is designed in a ring or U-shaped layout.
[0052] It should be noted that, from the above embodiments, the coupling ends B and C of the directional coupler 22 can be directly connected to the input and output ends of the phase shifter 11, or only connected using a short microstrip line, which will result in the directional coupler requiring a ring or U-shaped design. Therefore, the directional coupler 22 mentioned in this embodiment can include various directional coupler layouts that meet the ring or U-shape.
[0053] As an example, if the design is based on 1.8G as the central frequency, Figure 1 In the case where the coupler length of the traditional MNM unit is 5 mm, and both TL1 and TL2 are 10 mm, Figure 3 The total length of the through line AD of the U-shaped directional coupler 22 of the non-magnetic active isolator proposed in the embodiment of the present application is 5 mm, eliminating the use of two long microstrips TL1 and TL2. At the same time, since the area of the phase shifter 11 is very small, the length and width of the U-shaped directional coupler 22 can be flexibly changed.
[0054] Reference Figure 5 In some feasible embodiments, when multiple non-magnetic active isolators are cascaded, the output end of the front-stage non-magnetic active isolator and the input end of the rear-stage non-magnetic active isolator do not need to be connected through a microstrip line.
[0055] Depend on Figure 5 It can be seen that in this embodiment, by replacing the MNM unit in the related art with the non-magnetic active isolator provided based on the above embodiment, multiple MNM units can be cascaded more compactly. This is because the new layout provided by this embodiment makes it possible to have basically no redundant microstrip connecting lines when cascading each level of MNM units, while the traditional method needs to consider the layout influence of two long microstrips. Therefore, the new cascade layout can meet the cascade solution with limited chip area and further improve the bandwidth.
[0056] As an example, the three-stage cascade structure obtained based on the traditional MNM unit and the three-stage cascade structure obtained based on the non-magnetic active isolator proposed in the embodiment of the present application are simulated and verified by the commercial simulation software ADS. During the simulation, the resonant frequency of each stage needs to be adjusted so that it has a certain deviation to achieve a broadband effect. In this process, it is found that the cascaded three-stage traditional MNM unit requires 6 10mm microstrip lines, which greatly increases the layout difficulty, while the cascaded three-stage non-magnetic active isolator proposed in the embodiment of the present application only needs to connect the input and output ends of the U-shaped directional coupler 22 in sequence. The simulation results are as follows: The bandwidth of the three-stage traditional MNM unit cascade structure is 105MHz, and the bandwidth of the three-stage non-magnetic active isolator cascade structure is 214MHz, which is more than doubled than the traditional cascade structure. At present, the bandwidth required in the communication field mostly exceeds 200MHz. Therefore, the non-magnetic active isolator proposed in the embodiment of the present application can meet the application by cascading three stages, while the traditional MNM unit needs to be cascaded for more than 3 stages to be applicable, which greatly wastes the area.
[0057] Reference Figure 6 As an example, the present application embodiment proposes a more compact layout design, such as Figure 6 As shown, in this embodiment, the directional coupler 22 includes a plurality of bent structures connected in sequence.
[0058] It can be understood that in this embodiment, the coupling line BC and the through line AD of the directional coupler 22 are recessed, so that the structure of the non-magnetic active isolator is more compact and occupies a smaller area, which can be regarded as adopting a U-shaped multi-bend layout design. In addition, based on the U-shaped multi-bend layout design provided in this embodiment, in some embodiments, the directional coupler 22 can also adopt a ring-shaped multi-bend layout design.
[0059] Reference Figure 7 In some feasible embodiments, the amplifier circuit 01 or 02 in the above embodiments may include:
[0060] An input matching module 101, one end of the input matching module 101 is an input end IN of the amplifier circuit;
[0061] An active single-tube amplifier FET, wherein a gate of the active single-tube amplifier FET is connected to the other end of the input matching module 101, and a source of the active single-tube amplifier FET is grounded;
[0062] The output matching module 102 has one end connected to the drain of the active single-tube amplifier FET and a preset power supply VCC, and the other end of the output matching module 102 is the output end OUT of the amplifier circuit.
[0063] As an example, the input matching module 101 may include:
[0064] An input matching circuit, one end of the input matching circuit being an input end IN of the amplifier circuit;
[0065] A first capacitor C1, one end of the first capacitor C1 is connected to the other end of the input matching circuit, and the other end of the first capacitor C1 is connected to the gate of the active single-tube amplifier FET.
[0066] As an example, the output matching module 102 may include:
[0067] An inductor L1, one end of the inductor L1 is connected to the drain of the active single-tube amplifier FET, and the other end of the inductor L1 is connected to a preset power supply VCC;
[0068] A second capacitor C2, one end of the second capacitor C2 is connected to one end of the inductor L1 and the drain of the active single-tube amplifier FET;
[0069] An output matching circuit, one end of the output matching circuit is connected to the other end of the second capacitor C2, and the other end of the output matching circuit is the output end OUT of the amplifier circuit.
[0070] It can be understood that this embodiment only provides one implementation of the amplifier circuit 01 or 02 in the above embodiment. In this embodiment, the first capacitor C1 and the second capacitor C2 are used to isolate the influence of the DC bias on the input signal and the output signal, the inductor L1 is used to isolate the influence of the AC signal on the DC bias source, and the input matching circuit and the output matching circuit are used to adjust the gain and phase of the phase shifter 11 and meet the impedance matching at the same time, so that the gain and phase of the phase shifter 11 meet the condition for the loop to resonate.
[0071] It should be understood that the loop in this embodiment is composed of the phase shifter 11 and the directional coupler 22. The condition for the loop to resonate is that the phase sum of the phase shifter 11 and the directional coupler 22 is an integer multiple of 2π within the design bandwidth and the gain of the loop is less than 1 dB.
[0072] As an example, the above-mentioned active single-tube amplifier FET is a field effect transistor.
[0073] As an example, the active single-tube amplifier FET mentioned above may also be replaced by a bipolar transistor, a high electron mobility transistor (HEMT), a complementary metal oxide semiconductor (CMOS) or any other device with similar functions.
[0074] In addition, the present application embodiment also provides an electronic device 100, referring to Figure 8 The electronic device 100 includes the above-mentioned non-magnetic active isolator 200. It can be understood that since the above-mentioned non-magnetic active isolator 200 is used in the electronic device 100, the embodiment of the electronic device 100 includes all technical solutions of all embodiments of the above-mentioned non-magnetic active isolator 200, and the technical effects achieved are also exactly the same, which will not be repeated here.
[0075] The above is a specific description of the preferred implementation of the embodiment of the present application, which does not limit the patent scope of the present application. All equivalent structural changes made using the contents of the present application specification and drawings under the application concept of the present application, or direct / indirect application in other related technical fields are included in the patent protection scope of the present application.
Claims
1. A non-magnetic active isolator, characterized in that: include: A phase shifter, the phase shifter comprising at least two stages of amplifier circuits, the input end of the first stage of the amplifier circuit being the input end of the phase shifter, and the output end of the last stage of the amplifier circuit being the output end of the phase shifter; A directional coupler, the directional coupler comprising a coupling line and a through line, one end of the coupling line is directly connected to the input end of the phase shifter, the other end of the coupling line is directly connected to the output end of the phase shifter, the through line and the coupling line are arranged in parallel, and both the through line and the coupling line are microstrip lines for transmitting signals.
2. The non-magnetic active isolator according to claim 1, characterized in that: When a plurality of the non-magnetic active isolators are cascaded, one end of a through line in a preceding non-magnetic active isolator is directly connected to one end of a through line in a succeeding non-magnetic active isolator.
3. The non-magnetic active isolator according to claim 1, characterized in that: The phase shifter is directly connected to the coupling line via a microstrip line of a preset length.
4. The non-magnetic active isolator according to claim 1, characterized in that: The directional coupler adopts a U-shaped layout design.
5. The non-magnetic active isolator according to claim 1, characterized in that: The directional coupler includes a plurality of bent structures connected in sequence.
6. The non-magnetic active isolator according to claim 1, characterized in that: The amplifier circuit comprises: An input matching module, one end of which is an input end of the amplifier circuit; An active single-tube amplifier, wherein a gate of the active single-tube amplifier is connected to the other end of the input matching module, and a source of the active single-tube amplifier is grounded; An output matching module, one end of which is connected to the drain of the active single-tube amplifier and a preset power supply, and the other end of which is the output end of the amplifier circuit.
7. The non-magnetic active isolator according to claim 6, characterized in that: The input matching module and the output matching module are used to adjust the gain and phase of the phase shifter so that the gain and phase of the phase shifter meet the condition for the loop to resonate.
8. The non-magnetic active isolator according to claim 7, characterized in that: The loop is composed of the phase shifter and the directional coupler. The condition for the loop to resonate is that the sum of the phases of the phase shifter and the directional coupler is an integer multiple of 2π, and the gain of the loop is less than 1.
9. The non-magnetic active isolator according to claim 6, characterized in that: The active single-tube amplifier is a field effect transistor.
10. An electronic device, characterized in that: The electronic device comprises the non-magnetic active isolator according to any one of claims 1 to 9.