A small and lightweight duplexer and calibration method thereof

Abstract

The present invention discloses a small and lightweight duplexer and a calibration method, comprising a shell and a cover plate, a cavity formed by the shell and the cover plate, and a design in which the interior of the cavity is connected to a common signal port through a common cavity tapping portion, so that the overall structure of the duplexer is more compact and lightweight, and through the design of the common cavity tapping portion, the common signal port is respectively connected to two signal channels through the common cavity tapping portion, so that energy transfer is realized and mutual influence caused by narrow passband interval is eliminated. Different from the conventional direct welding coupling scheme, the common cavity tapping portion is used to form a common cavity in this scheme, and both signal channels realize signal transfer with the common signal port through the common cavity tapping portion, so that the consistency of the electrical performance of the duplexer is ensured in a smaller space, and there is no need to introduce a large number of additional electronic components, which is conducive to the miniaturization of the duplexer.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile communication structures, and in particular to a small-sized lightweight duplexer and a calibration method thereof. Background Art

[0002] With the rapid development of mobile communication technology, spectrum resources for communication signal transmission are becoming increasingly tight. While ensuring that the frequency bandwidth used for mobile communication does not increase, technicians in this field hope to make more reasonable use of the current frequency and space. Among them, the duplexer is a key component for technicians in this field to achieve the above demands.

[0003] Specifically, a duplexer is a passive three-port device, which is used to connect two filter networks of different frequencies to a common terminal to achieve a reduction in volume. However, as the complexity of the internal structure of the antenna increases and the spatial compactness of the internal structure of the antenna increases, the duplexer in the prior art has been difficult to further adapt to the internal structure of the antenna. Exemplarily, the duplexer in the prior art includes two signal input terminals and one signal output terminal, which couples the signals of the two signal input terminals to the signal output terminal by tap coupling to achieve the signal output of the duplexer; wherein, tap coupling refers to welding a signal input terminal to a signal output terminal using a coupler, and welding another signal input terminal to a signal output terminal using another coupler, which has the disadvantages of poor consistency and mutual influence of coupling. In order to overcome the above disadvantages, it is generally necessary to introduce many electronic components into the duplexer to increase the consistency of electrical performance, but it is obviously not conducive to the miniaturization of the duplexer.

[0004] That is to say, how to reduce the size of the duplexer while ensuring the consistency of the electrical performance of the duplexer is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0005] The purpose of the present invention is to provide a small and lightweight duplexer to solve the technical problem that the duplexer in the prior art is difficult to further reduce in size in order to ensure consistent electrical performance of the duplexer.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A small and lightweight duplexer comprises a shell and a cover plate, wherein the shell and the cover plate are enclosed together to form a cavity, wherein a common signal port and two signal channels respectively connected to the common signal port are arranged in the cavity; and one end of the signal channel away from the common signal port is connected to a signal input port;

[0008] The cavity is provided with a common cavity tapping portion outside the common signal port, and the common signal port is connected to the two signal channels respectively through the common cavity tapping portion.

[0009] Optionally, a plurality of resonant parts are arranged in the signal channel, and the plurality of resonant parts are arranged in series along a first direction, and a capacitor or an inductor window is correspondingly arranged on the resonant part.

[0010] Optionally, the resonance part in the cavity that is closest to the common signal port is a first resonance unit, and the remaining resonance parts are second resonance units that are sequentially arranged along the first direction.

[0011] Optionally, the common cavity tap portion includes a common cavity body, one end of the common cavity body is connected to the resonant cavity in one of the first resonant units, and the other end of the common cavity body is connected to the resonant cavity in another of the first resonant units.

[0012] Optionally, the common cavity includes a first sub-cavity and a second sub-cavity, and the common signal port is located between the first sub-cavity and the second sub-cavity;

[0013] A third resonance unit is disposed in the first sub-cavity, a fourth resonance unit is disposed in the second sub-cavity, the third resonance unit is connected in series to an end of one of the first resonance units, and the fourth resonance unit is connected in series to an end of another of the first resonance units;

[0014] The third resonance unit is electrically connected to the common signal port through a transmission line, and the fourth resonance unit is electrically connected to the common signal port through another transmission line.

[0015] Optionally, the common cavity tap is coupled to a first resonance unit in the signal channel.

[0016] Optionally, the input impedance of the signal input port is 50Ω.

[0017] In another embodiment, a calibration method for a small and lightweight duplexer is provided, which is applied to any of the above embodiments and includes:

[0018] S1, adjusting the resonant frequency of the third resonant unit and the resonant frequency of the fourth resonant unit to preset initial values ​​respectively;

[0019] S2, input the first signal F to the first channel A , input the second signal F to the second channel B , where the first signal F A With the second signal F B Input alternately at a preset frequency S;

[0020] S3, respectively obtain the first signal F A The first isolation S 11 and the first reflection loss S 12 , the second signal F BThe second isolation S 21 and the second reflection loss S 22 ;

[0021] S4, according to the preset first formula, the frequency S of the first signal A and the frequency S of the second signal B Calculate the first impact frequency f1, according to the preset second formula, the frequency S of the first signal A and the frequency S of the second signal B Calculate the second impact frequency f2;

[0022] Among them, the first formula is:

[0023] ;

[0024] The second formula is:

[0025] .

[0026] S5, according to the preset third formula, the first impact frequency f1, the first isolation degree S 11 and the first reflection loss S 12 Calculating a first adjustment amount θ1;

[0027] According to the preset fourth formula, the second impact frequency f2, the second isolation degree S 21 and the second reflection loss S 22 Calculating a second adjustment amount θ2;

[0028] Among them, the third formula is:

[0029] ;

[0030] The fourth formula is:

[0031] .

[0032] S6. Adjust the rotation angle of the third resonance unit according to the first adjustment amount θ1, and adjust the rotation angle of the fourth resonance unit according to the second adjustment amount θ2.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The small and lightweight duplexer provided by the present invention has a cavity formed by the shell and the cover plate, and the cavity is connected to the common signal port through the common cavity tapping part, so that the overall structure of the duplexer is more compact and lightweight. Among them, the common signal port is connected to the two signal channels respectively through the common cavity tapping part, so as to realize the energy transfer and eliminate the mutual influence caused by the narrow passband interval. Different from the conventional direct welding coupling scheme, the common cavity tapping part is used to form a common cavity in this scheme, and the two signal channels realize the signal transmission between the common signal port through the common cavity tapping part, so as to ensure the consistency of the electrical performance of the duplexer in a smaller space, and it is not necessary to introduce many additional electronic components, which is conducive to the miniaturization of the duplexer. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0036] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0037] Figure 1 A schematic diagram of a first partial structure of a small-sized and lightweight duplexer provided in an embodiment of the present invention;

[0038] Figure 2 for Figure 1 Used for the local enlarged structure at A;

[0039] Figure 3 A second partial structural schematic diagram of a small-sized lightweight duplexer provided in an embodiment of the present invention;

[0040] Figure 4 A schematic diagram of an exploded structure of a small-sized lightweight duplexer provided by an embodiment of the present invention;

[0041] Illustration: 10, housing; 11, cavity; 111, capacitor; 112, inductor window; 12, common signal port; 13, signal input port; 14, signal channel; 141, first channel; 142, second channel; 20, cover plate; 21, heat dissipation hole; 22, outer cover plate; 23, inner cover plate;

[0042] 30. Common cavity tapping section; 31. Common cavity; 311. First sub-cavity; 312. Second sub-cavity; 32. Transmission line; 40. Resonance section; 41. First resonant unit; 42. Second resonant unit; 43. Third resonant unit; 44. Fourth resonant unit. DETAILED DESCRIPTION

[0043] In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described below 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 creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0045] The technical solution of the present invention is further described below with reference to the accompanying drawings and through specific implementation methods.

[0046] like Figures 1 to 4 As shown, Figure 1 A first partial structural diagram of a small-sized and lightweight duplexer provided in an embodiment of the present invention, Figure 2 for Figure 1 Use the local enlarged structure at A. Figure 3 A second partial structural diagram of a small-sized lightweight duplexer provided in an embodiment of the present invention, Figure 4 A schematic diagram of the exploded structure of a small and lightweight duplexer provided in an embodiment of the present invention.

[0047] Embodiment 1:

[0048] The small and lightweight duplexer provided in this embodiment is widely used in various communication systems, including wireless transmission systems, wireless cellular systems, satellite communication systems, and wireless broadband systems. They are frequency-selective devices used to fuse or separate signals of different frequencies in a multi-port network. In design, a duplexer is one of the simplest multiplexers. It is a passive three-port device used to connect two filter networks of different frequencies to a common terminal. In this embodiment, the structure of the small and lightweight duplexer is improved to achieve a smaller volume, reduce weight and reduce costs while maintaining the stability of the original electrical performance indicators. The indicators are also more stable and reliable during use. The working bandwidth and other indicators can be designed according to actual needs, and the process is reliable, and assembly and debugging are convenient.

[0049] like Figures 1 to 4 As shown, the small-sized lightweight duplexer in this embodiment includes a housing 10 and a cover plate 20, wherein the housing 10 and the cover plate 20 together enclose a cavity 11, wherein a common signal port 12 and two signal channels 14 respectively connected to the common signal port 12 are arranged in the cavity 11; and one end of the signal channel 14 away from the common signal port 12 is connected to a signal input port 13;

[0050] The cavity 11 is provided with a common cavity tapping portion 30 outside the common signal port 12 , and the common signal port 12 is connected to the two signal channels 14 respectively through the common cavity tapping portion 30 .

[0051] Specifically, the small lightweight duplexer includes a shell 10 and a cover plate 20. The shell 10 adopts a lightweight aluminum structure. The shell 10 and the cover plate 20 together enclose a cavity 11. Inside the cavity 11, a common signal port 12 is designed to be connected to two signal channels 14. The two signal channels 14 are each connected to a signal input port 13 at the end point away from the common signal port 12.

[0052] In order to achieve effective signal management and distribution, a common cavity tap part 30 is provided in the cavity 11 adjacent to the common signal port 12, and the common signal port 12 is connected to the two signal channels 14 through the common cavity tap part 30. This design allows the duplexer to process and distribute signals more efficiently and accurately when sending and receiving signals, while maintaining the small and lightweight characteristics of the duplexer, while achieving a smaller volume, reducing weight and reducing costs, while also maintaining the original electrical performance indicators stable; through the structural design of the common cavity tap part 30 and the common signal port 12, the signal can be effectively distributed and managed between the two channels, which helps to improve the efficiency of signal processing. The addition of the common cavity tap part 30 optimizes the signal transmission path, reduces the signal loss and interference during the transmission process, and thus improves the signal transmission quality. That is to say, the common signal port 12 is connected to the two signal channels 14 respectively through the common cavity tap part 30, so as to realize energy transfer and eliminate the mutual influence caused by the narrow passband interval. Different from the conventional direct welding coupling scheme, the common cavity tap part 30 is used to form a common cavity in this scheme, and the two signal channels 14 realize signal transmission with the common signal port 12 through the common cavity tap part 30, thereby ensuring the consistency of the electrical performance of the duplexer in a smaller space, and there is no need to introduce a large number of additional electronic components, which is conducive to the miniaturization of the duplexer.

[0053] On the basis of the above embodiment, a plurality of resonant parts 40 are arranged in the signal channel 14, and the plurality of resonant parts 40 are arranged in series along the first direction, and each of the plurality of resonant parts 40 is correspondingly provided with a capacitor 111 or an inductor window 112. Among them, by selecting different capacitors 111 or inductor windows 112, the operating frequency of the resonant part 40 can be assisted to adjust the bandwidth of the signal channel 14. It should be supplemented that the resonant part 40 is a device in the signal channel 14, which plays a role in adjusting the resonant frequency of the signal channel 14.

[0054] Furthermore, the resonance part 40 in the cavity 11 closest to the common signal port 12 is the first resonance unit 41, and the other resonance parts 40 are second resonance units 42 arranged in sequence along the first direction; it can be understood that after the signal enters from the signal input port 13, it passes through multiple second resonance units 42 in sequence, and finally enters the common signal port 12 from the first resonance unit 41 through the common cavity tap part 30 to complete the signal filtering; technical personnel in this field can change the resonance frequencies of the first resonance unit 41 and the second resonance unit 42, thereby changing the filtering performance of the signal channel 14, and after the corresponding signal is specifically filtered, it is input into the common signal port 12 through the common cavity tap part 30.

[0055] Furthermore, the common cavity tap part 30 includes a common cavity body 31 , one end of the common cavity body 31 is connected to the resonant cavity in a first resonant unit 41 , and the other end of the common cavity body 31 is connected to the resonant cavity in another first resonant unit 41 .

[0056] The common cavity 31 includes a first sub-cavity 311 and a second sub-cavity 312, and the common signal port 12 is located between the first sub-cavity 311 and the second sub-cavity 312; a third resonance unit 43 is configured in the first sub-cavity 311, and a fourth resonance unit 44 is configured in the second sub-cavity 312, the third resonance unit 43 is connected in series to the end of a first resonance unit 41, and the fourth resonance unit 44 is connected in series to the end of another first resonance unit 41; the third resonance unit 43 is electrically connected to the common signal port 12 through a transmission line 32, and the fourth resonance unit 44 is electrically connected to the common signal port 12 through another transmission line 32.

[0057] Exemplarily, the signal channel 14 includes a first channel 141 and a second channel 142, and the signal input port 13 includes a first input terminal and a second input terminal. Resonance parts 40 are provided in the first channel 141 and the second channel 142. There are multiple groups of resonance parts 40, and the multiple groups of resonance parts 40 are arranged in series along the first direction. The capacitor 111 is arranged on the first channel 141, and each resonance part 40 is correspondingly provided with a capacitor 111. The inductance window 112 is arranged on the second channel 142, and each resonance part 40 on the second channel 142 is also provided with a corresponding inductance window 112. In the actual working state, the first input port and the second input port both input signal values, and the first signal value is coupled out to the coupling common cavity tap part 30 through the capacitor 111 in the first channel 141 in turn, and then to the common signal port 12.

[0058] The arrangement of capacitor 111 and inductor window 112 enables the duplexer to control the transmission path of the signal more accurately, and the capacitor 111 and the inductor function are integrated into the window simultaneously, and the extra circuit elements required inside the duplexer can be reduced, thereby simplifying the circuit design, reducing the volume, and reducing the cost. Meanwhile, this integrated design also helps to improve the reliability and stability of the duplexer. Through the accurate design of capacitor 111 and inductor window 112, while keeping the volume and cost of the duplexer low, its performance can be improved, the transmission efficiency of the signal can be improved, the insertion loss can be reduced, and the isolation degree can be improved, so that the performance of the whole communication system is enhanced.

[0059] In the embodiment of the present application, the input impedance of the signal input port 13 is set to 50Ω. The standard characteristic impedance adopted by most modern communication systems and network equipment is 50Ω. By designing the input impedance of the signal input port 13 to 50Ω, it is possible to ensure seamless matching between the duplexer and these devices or systems, reduce signal reflection and loss, and improve the efficiency and quality of signal transmission. By adopting the industry standard 50Ω input impedance, the system design and testing process can be simplified, reducing the design complexity and problems encountered in testing.

[0060] On the basis of the above embodiment, the common cavity tap section 30 is coupled with the first resonance unit 41 in a signal channel 14, and the common cavity tap section 30 is also coupled with the first resonance unit 41 in another signal channel 14. The setting of the common cavity tap section 30 can effectively prevent mutual influence between different signal channels 14.

[0061] Specifically, through the coupling design of the common cavity tap 30 and the resonant cavity of the first resonant unit 41 of each path, clear energy separation can be effectively achieved between different frequency bands. This separation helps to eliminate the mutual interference caused by the narrow passband interval, thereby improving the stability and signal clarity of the duplexer when processing multi-frequency signals. The position and design of the second resonant unit 42 enable it to play a key primary filtering role in signal processing, and the subsequent first resonant unit 41 further refines the signal processing and enhances the selectivity of the duplexer to specific frequency signals, thereby improving the accuracy of signal processing.

[0062] Taking a specific embodiment of the resonance part 40 as an example, the resonance part 40 includes a resonance column (not shown) and a first mounting column (not shown) protruding from the bottom wall of the cavity 11, the resonance column is arranged on the upper end surface of the first mounting column in the length direction, the first mounting column is provided with a first connection hole, the resonance column is at least partially installed in the first connection hole, and the resonance column is provided with a resonance hole along the length direction. It can be understood that the resonance column is installed on the first mounting column to ensure the stability of the resonance column during operation, and the setting of the resonance hole allows the staff to finely adjust the resonance frequency of the resonance column by screwing the resonance hole, that is, by changing the size or position of the resonance column, the resonance frequency of the resonance part 40 can be adjusted, thereby accurately controlling the operating frequency of the duplexer. As other optional embodiments, the resonance part 40 can also select other structures, which are not specifically limited in this embodiment. The resonance part 40 can change the resonance frequency of the corresponding signal channel 14 according to actual needs.

[0063] It should be supplemented that the cover plate 20 includes an outer cover plate 22 and an inner cover plate 23, the outer cover plate 22 is bolted to the inner cover plate 23, and the resonance part 40 also includes a tuning screw (not shown) passing through the inner cover plate 23, and the tuning screw is connected to the resonance hole.

[0064] The bolt connection design between the outer cover plate 22 and the inner cover plate 23 enhances the structural stability of the entire device. This stable structural design helps to protect the internal resonant part 40; the design of the tuning screw not only facilitates the adjustment of the frequency, but also makes it easier to maintain and replace the resonant part 40. By adjusting the rotation angle of the tuning screw connected to the resonant hole, the position of the resonant column can be changed, and the resonant frequency of the resonant part 40 can be accurately adjusted. This adjustment method allows the duplexer to better adapt to specific operating frequency requirements and optimize the performance of the communication system. Since different communication systems need to work at different frequencies, the setting of the tuning screw enables the same model of duplexer to be flexibly applied to the needs of a variety of different frequencies, reducing the need to design and manufacture different models of duplexers for specific applications, and improving the adaptability and flexibility of the product. At the same time, it is also convenient to make dynamic adjustments during the operation of the duplexer to adapt to environmental changes or changes in system requirements. For example, temperature changes and equipment aging can affect the resonance characteristics. The tuning screw can be used to achieve real-time adjustment to maintain the stability of system performance.

[0065] In one embodiment, a plurality of heat dissipation holes 21 are disposed on the cover plate 20 .

[0066] During the use of the duplexer, its internal components will generate a lot of heat. Excessive temperature will not only affect the performance of electronic components, but also cause premature aging or damage of the components. By setting up multiple groups of heat dissipation holes 21, the temperature of the internal components of the device is kept within a safe operating range, thereby increasing the service life and stability of the duplexer. As the functions of the duplexer increase and the performance improves, its power consumption increases accordingly, and the heat dissipation demand also increases accordingly. Designing multiple groups of heat dissipation holes 21 on the cover plate 20 can support high-power design requirements, ensuring that the duplexer can effectively dissipate heat and maintain stable performance even under continuous high-load operation. Effective heat dissipation design can enhance the stable operation capability of the equipment under different environmental conditions. In a high-temperature environment, multiple groups of heat dissipation holes 21 can enhance the heat dissipation performance of the duplexer, ensuring that the equipment can adapt to a wider range of working environments, thereby expanding its scope of application.

[0067] In another embodiment, a calibration method for a small and lightweight duplexer is also provided, comprising:

[0068] S1. Adjust the resonant frequency of the third resonant unit 43 and the resonant frequency of the fourth resonant unit 44 to preset initial values ​​respectively; specifically, adjust the rotation angle of the tuning screws of the third resonant unit 43 and the fourth resonant unit 44 to preset initial angles, so that the resonant frequency of the third resonant unit 43 and the resonant frequency of the fourth resonant unit 44 reach preset initial values ​​respectively, and the initial values ​​are related to the size and design parameters of the duplexer, and are adjusted according to actual conditions;

[0069] S2. Input the first signal F to the first channel 141. A , input the second signal F to the second channel 142 B , where the first signal F A With the second signal F B It should be noted that in this embodiment, the first signal F is realized by a network analyzer. A With the second signal F B Alternating input;

[0070] S3, respectively obtain the first signal F A The first isolation S 11 and the first reflection loss S 12 , the second signal F B The second isolation S 21 and the second reflection loss S 22 ; Among them, the above isolation and reflection loss can be directly measured by connecting the network analyzer to the common signal port 12, and will not be described in detail in this embodiment; it should be supplemented that the higher the isolation, the smaller the interference between channels, and the reflection loss indicates the degree to which the signal is reflected at the source end. The higher the reflection loss, the better the signal matching (high reflection loss means that most of the energy is used for effective signal transmission);

[0071] S4, according to the preset first formula, the frequency S of the first signal A and the frequency S of the second signal B Calculate the first impact frequency f1, according to the preset second formula, the frequency S of the first signal A and the frequency S of the second signal B Calculate the second impact frequency f2; the above impact frequency reflects the mutual impact between different signal channels 14 when the duplexer is actually used;

[0072] Among them, the first formula is:

[0073] ;

[0074] The second formula is:

[0075] ;

[0076] Wherein, α is a frequency adjustment coefficient, which is determined according to the parameters of the duplexer and is preferably 0.05 in this embodiment;

[0077] S5, according to the preset third formula, the first impact frequency f1, the first isolation degree S 11 and the first reflection loss S 12 Calculating a first adjustment amount θ1;

[0078] According to the preset fourth formula, the second impact frequency f2, the second isolation degree S 21 and the second reflection loss S 22 Calculating a second adjustment amount θ2;

[0079] Among them, the third formula is:

[0080] ;

[0081] The fourth formula is:

[0082] ;

[0083] Wherein, K is the resonant frequency adjustment coefficient, which is determined according to the parameters of the duplexer and is preferably 2 in this embodiment; for The difference from the target isolation, for The difference from the target reflection loss; for The difference from the target isolation, for The difference between the target reflection loss and the target isolation are preset duplexer parameters, which are determined according to the application scenario of the duplexer.

[0084] S6, adjusting the rotation angle of the third resonance unit 43 according to the first adjustment amount θ1, and adjusting the rotation angle of the fourth resonance unit 44 according to the second adjustment amount θ2;

[0085] S7. Continuously input the first signal F to the first channel 141 A , adjust the rotation angle of the third resonance unit 43 until and The second signal F is continuously input to the second channel 142. B , adjust the rotation angle of the fourth resonance unit 44 until and Both are 0.

[0086] For example, to facilitate understanding by those skilled in the art, K ​​is 2, α is 0.05, and S A 2.45GHz, S B Taking 5.8 GHz as an example, the adjustment process of the third resonance unit 43 and the fourth resonance unit 44 is demonstrated;

[0087] S1, adjusting the resonant frequency of the third resonant unit 43 and the resonant frequency of the fourth resonant unit 44 to preset initial values ​​respectively;

[0088] S2. Input the first signal F at a preset frequency S (for example, alternating once per second) AWith the second signal F B ; Different from the complete signal input alone, the test time of this step is shorter, and the input is alternately input at a preset frequency, which is convenient for the subsequent quantification of the influence of signals of different frequencies, and then convenient for the user to adjust a certain resonant part alone; Different from the simultaneous input of signals, the network analyzer in this scheme still analyzes one by one, which can ensure the measurement accuracy of each signal channel 14, and therefore, can ensure the adjustment accuracy of the subsequent steps;

[0089] S3, respectively obtain the first signal F A The first isolation S 11 and the first reflection loss S 12 ;

[0090] S4, according to the preset first formula, the frequency S of the first signal A and the frequency S of the second signal B Calculate the first impact frequency f1; calculate the first impact frequency f1 to be 0.91;

[0091] S5, according to the preset third formula, the first impact frequency f1, the first isolation degree S 11 and the first reflection loss S 12 Calculate the first adjustment amount θ1; calculate the first adjustment amount θ1 to be 9.2°;

[0092] S6, adjusting the rotation angle of the third resonance unit 43 according to the first adjustment amount θ1;

[0093] S7. Continuously input the first signal F to the first channel 141 A , adjust the rotation angle of the third resonance unit 43 until and All are 0;

[0094] Similarly, the calculation process of the fourth resonance unit 44 is the same as the calculation process of the third resonance unit 43, and is not described in detail in this embodiment.

[0095] It should be noted that the present solution in steps S2 to S6 is a preliminary adjustment of the resonance part, using the alternately input first signal F A With the second signal F B, the test time can be shortened. At the same time, the above steps are essentially one-to-one detection, which can avoid the situation where two signals are input at the same time and the signals in the two signal channels 14 affect each other. The frequency adjustment coefficient α and the resonance frequency adjustment coefficient K are used to adjust the isolation and reflection loss respectively, aiming to quickly obtain the preliminary adjustment amount of the resonance part, which not only ensures the test efficiency but also improves the test accuracy; that is, in steps S2 to S6, a preliminary adjustment value can be provided to the user, so that the user can quickly adjust the third resonance unit 43 and the fourth resonance unit 44 to near the target value, and then input the corresponding signal separately, and fine-tune the third resonance unit 43 or the fourth resonance unit 44, so that each signal channel can achieve the qualified value of isolation and reflection loss, making the user's operation more convenient and concise, and at the same time effectively achieving clear energy separation between different frequency bands.

[0096] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A calibration method for a small and lightweight duplexer, applied to a small and lightweight duplexer, characterized in that: The small and lightweight duplexer comprises a housing (10) and a cover plate (20), wherein the housing (10) and the cover plate (20) together enclose a cavity (11), wherein a common signal port (12) and two signal channels (14) respectively connected to the common signal port (12) are arranged in the cavity (11); an end of the signal channel (14) away from the common signal port (12) is connected to a signal input port (13); The cavity (11) is provided with a common cavity tapping portion (30) outside the common signal port (12), and the common signal port (12) is connected to the two signal channels respectively through the common cavity tapping portion (30); A plurality of resonant parts (40) are arranged in the signal channel, and the resonant part (40) in the cavity (11) closest to the common signal port (12) is a first resonant unit (41); The common cavity tapping section (30) comprises a common cavity (31), the common cavity (31) comprises a first sub-cavity (311) and a second sub-cavity (312), and the common signal port (12) is located between the first sub-cavity (311) and the second sub-cavity (312); A third resonance unit (43) is arranged in the first sub-cavity (311), a fourth resonance unit (44) is arranged in the second sub-cavity (312), the third resonance unit (43) is connected in series to the end of one of the first resonance units (41), and the fourth resonance unit (44) is connected in series to the end of another of the first resonance units (41); The third resonance unit (43) is electrically connected to the common signal port (12) via a transmission line (32), and the fourth resonance unit (44) is electrically connected to the common signal port (12) via another transmission line (32); The calibration method comprises: S1, adjusting the resonance frequency of the third resonance unit (43) and the resonance frequency of the fourth resonance unit (44) to preset initial values ​​respectively; S2. Input the first signal F to the first channel A , input the second signal F to the second channel B , where the first signal F A With the second signal F B Input alternately at a preset frequency S; S3, respectively obtain the first signal F A The first isolation S 11 and the first reflection loss S 12 , the second signal F B The second isolation S 21 and the second reflection loss S 22 ; S4, according to the preset first formula, the frequency S of the first signal A and the frequency S of the second signal B Calculate the first impact frequency f1, according to the preset second formula, the frequency S of the first signal A and the frequency S of the second signal B Calculate the second impact frequency f2; Among them, the first formula is: ； The second formula is: ； α is the frequency adjustment coefficient; S5, according to the preset third formula, the first impact frequency f1, the first isolation degree S 11 and the first reflection loss S 12 Calculating a first adjustment amount θ1; According to the preset fourth formula, the second impact frequency f2, the second isolation degree S 21 and the second reflection loss S 22 Calculating a second adjustment amount θ2; Among them, the third formula is: ； The fourth formula is: ； K is the resonant frequency adjustment coefficient; for The difference from the target isolation, for The difference from the target reflection loss; for The difference from the target isolation, for The difference from the target reflection loss; S6. Adjust the rotation angle of the tuning screw of the third resonance unit (43) according to the first adjustment amount θ1, and adjust the rotation angle of the tuning screw of the fourth resonance unit (44) according to the second adjustment amount θ2.

2. The calibration method of a small and lightweight duplexer according to claim 1, characterized in that: A plurality of the resonant parts are arranged in series along a first direction, and each resonant part (40) is correspondingly provided with a capacitor (111) or an inductor window (112).

3. The calibration method of a small and lightweight duplexer according to claim 2, characterized in that: The remaining resonant parts (40) are second resonant units (42) arranged in sequence along the first direction.

4. The calibration method of a small and lightweight duplexer according to claim 1, characterized in that: The common cavity tap section (30) is coupled to a first resonance unit (41) in the signal channel.

5. The calibration method of a small and lightweight duplexer according to claim 1, characterized in that: The input impedance of the signal input port (13) is 50Ω.

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