Coupler with adjustable resonance rod

Abstract

The invention discloses a coupler with an adjustable resonance rod, and the coupler comprises a cavity which is provided with a cover plate on the upper end surface; the outer wall of the first side surface of the cavity is provided with a signal input end, the outer wall of the second side surface of the cavity is provided with a signal output end, and the first side surface is opposite to the second side surface; a signal coupling end is arranged on the outer wall of the third side surface of the cavity; the signal input end, the signal output end and the signal coupling end are integrally formed with the cavity in a die-casting manner; a through hole is formed in the cover plate, an adjustable resonance rod is arranged in the through hole in a penetrating mode, and the adjustable resonance rod is used for adjusting the coupling degree of the coupler. According to the invention, the coupling degree of the coupler can be rapidly and accurately adjusted.

Description

Technical Field

[0001] The present application relates to a coupler, and in particular to a coupler with an adjustable resonant rod. Background Art

[0002] The coupler is a key component in the optical fiber communication system, which can couple optical signals from one optical fiber to multiple optical fibers to achieve optical signal distribution. The design and physical structure of the coupler itself determine that the adjustment range of its coupling parameters is limited. Some existing couplers based on manual or mechanical adjustment need to change their internal structure through manual operation knobs or through driving devices such as motors. This process is relatively slow and it is difficult to accurately adjust the coupling degree to the required value. Inaccurate adjustment of coupling parameters will cause deviations in the signal power distribution of the coupler, thereby affecting the communication quality. Summary of the invention

[0003] The main purpose of the present application is to provide a coupler with an adjustable resonant rod. By arranging the adjustable resonant rod in the cavity, the coupling degree of the coupler can be quickly and accurately adjusted without an external power source.

[0004] To achieve the above objectives, this application provides the following technical solutions:

[0005] A coupler with an adjustable resonant rod, the coupler comprising: a cavity, the upper end surface of the cavity is provided with a cover plate; the outer wall of the first side surface of the cavity is provided with a signal input terminal, the outer wall of the second side surface of the cavity is provided with a signal output terminal, the first side surface and the second side surface are opposite to each other; the outer wall of the third side surface of the cavity is provided with a signal coupling terminal, the signal input terminal, the signal output terminal and the signal coupling terminal are respectively die-casted integrally with the cavity; a through hole is provided on the cover plate, the through hole is penetrated by an adjustable resonant rod, and the adjustable resonant rod is used to adjust the coupling degree of the coupler.

[0006] Optionally, the adjustable resonant rod comprises: a resonant rod body, a first end of the resonant rod body is fixed in the cavity, and a second end of the resonant rod body extends out of the through hole and is fixed with an adjustment knob.

[0007] Optionally, the middle portion of the adjustment knob is a hexagonal groove, and each side of the hexagonal groove corresponds to an adjustment gear.

[0008] Optionally, an adjusting piece is sleeved on the middle part of the resonance rod body, and the outer periphery of the adjusting piece is an irregular hexagon.

[0009] Optionally, the radius of the adjusting member corresponds one-to-one to the adjusting gear position.

[0010] Optionally, the radius of the adjusting member is 0.2 mm to 2.4 mm.

[0011] Optionally, a resistor is provided on an inner wall of the third side of the cavity.

[0012] Optionally, the resistance of the resistor is 50Ω to 500Ω.

[0013] Optionally, a coupling transmission line is provided in the cavity, one end of the coupling transmission line is connected to the signal coupling end, and the other end of the coupling transmission line is connected to the resistor.

[0014] Optionally, a main transmission line is further provided in the cavity, one end of the main transmission line is connected to the signal input end, and the other end of the main transmission line is connected to the signal output end.

[0015] The present application can bring the following beneficial effects: By setting an adjustable resonant rod in the cavity and combining a unique adjustment part design, the present application can achieve the effect of quickly and accurately adjusting the coupling degree without an external power source, greatly improving the efficiency and accuracy of coupling parameter adjustment. The present application not only simplifies the structure and reduces the cost, but also can flexibly adapt to the needs of different application scenarios, ensuring the high accuracy of signal power distribution and the stability of communication quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A top view of a coupler with an adjustable resonant rod provided in accordance with an embodiment of the present application;

[0017] Figure 2 A front view of a coupler with an adjustable resonant rod provided in accordance with another embodiment of the present application;

[0018] Figure 3 A schematic diagram of the structure of an adjustable resonant rod provided in another embodiment of the present application;

[0019] Figure 4 for Figure 3 Schematic diagram of the planar structure of the tunable resonant rod shown.

[0020] Reference numerals:

[0021] 1. Cavity; 2. Adjustable resonant rod; 21. Knob; 22. Resonant rod body; 23. Rotating part; 3. Main transmission line; 4. Signal input terminal; 5. Signal output terminal; 6. Resistor; 7. Coupling transmission line; 8. Signal coupling terminal; 9. Cover plate; 10. First side surface; 11. Second side surface; 12. Third side surface. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0023] It should be noted that all directional indications in the embodiments of the present invention (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 the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0026] Figure 1 is a top view of a coupler with an adjustable resonant rod according to an embodiment of the present application, Figure 2 is a front view of a coupler with an adjustable resonant rod, as shown in Figure 1 and Figure 2As shown, the coupler includes: a cavity 1, a cover plate 9 is provided on the upper end surface of the cavity 1; a signal input terminal 4 is provided on the outer wall of the first side surface 10 of the cavity 1, a signal output terminal 5 is provided on the outer wall of the second side surface 11 of the cavity 1, and the first side surface 10 and the second side surface 11 are opposite to each other; a signal coupling terminal 8 is provided on the outer wall of the third side surface 12 of the cavity 1, and the signal input terminal 4 and the signal output terminal 5 as well as the signal coupling terminal 8 are respectively die-casted integrally with the cavity 1, and a through hole is provided on the cover plate 9, and an adjustable resonance rod 2 is provided through the through hole, and the adjustable resonance rod 2 is used to adjust the coupling degree of the coupler.

[0027] The present application can adjust the coupling degree of the coupler quickly and accurately by injecting an adjustable resonant rod into the coupler, thereby solving the problem of insufficient accuracy caused by adjusting the coupling degree of the coupler by manual operation or by a driving device such as a motor.

[0028] In another exemplary embodiment, Figure 3 As shown, the adjustable resonance rod 2 includes: a resonance rod body 22, a first end of the resonance rod body 22 is fixed in the cavity 1, and a second end of the resonance rod body 22 extends out of the through hole and is fixed with an adjustment knob 21.

[0029] In this embodiment, the middle portion of the adjusting knob 21 is a hexagonal groove, and each side of the hexagonal groove is correspondingly provided with an adjusting gear. For example, Figure 4 As shown, the adjustment gear position may include adjusting gear 1, gear 2, gear 3, gear 4, gear 5 and gear 6 (each gear position specifically corresponds to Figure 4 The numbers 1 to 6 in the figure, and the setting of the number of gears is only exemplary and can be adjusted according to the specific situation of the coupler), the adjusting knob 21 can be rotated by an Allen wrench to adjust the adjusting gear.

[0030] In addition, each adjustment gear can adjust the distance between the main transmission line 3 and the coupled transmission line 7. At the same time, by adjusting the distance, the coupling degree between the main transmission line 3 and the coupled transmission line 7 can be adjusted, that is, the transmission efficiency of the signal from the main transmission line 3 to the coupled transmission line 7. Taking a coupler with a coupling degree of 20dB as an example, as the adjustment knob turns counterclockwise from gear 1 to a higher gear, the distance between the main transmission line 3 and the coupled transmission line 7 will gradually increase, thereby gradually reducing the coupling degree between the main transmission line 3 and the coupled transmission line 7. Specifically, the corresponding relationship between the distance between the main transmission line 3 and the coupled transmission line 7 and the coupling degree is shown in Table 1:

[0031] Table 1 Adjustment method and coupling degree change of irregular circular adjustable resonant rod coupler

[0032]

[0033] As shown in Table 1, for a coupler with a coupling degree of 20 dB, the standard spacing between the main transmission line 3 and the coupled transmission line 7 corresponds to the distance when the adjustment knob 21 is in the 1st position. At this time, the coupling degree remains unchanged at the design value of 20 dB. When rotating counterclockwise from the 1st position to the 2nd position, the spacing between the main transmission line 3 and the coupled transmission line 7 increases by 0.2 mm, which reduces the coupling degree by 0.4 dB to 19.6 dB. Continuing to rotate counterclockwise to the 3rd position, the spacing between the main transmission line 3 and the coupled transmission line 7 further increases by 0.3 mm, and the coupling degree decreases by another 0.6 dB to 19.4 dB. From the 3rd position to the 4th position, the spacing increases by 0.4 mm, resulting in an additional 0.8 dB reduction in the coupling degree, that is, the coupling degree becomes 19.2 dB. From the 4th position to the 5th position, the spacing increases by another 0.5 mm, so the coupling degree decreases by 1 dB to 19.0 dB. Finally, when switching from level 5 to level 6, the spacing increases by 1mm and the coupling drops significantly by 2dB, with the final coupling being 18.0dB.

[0034] In addition, the adjustment distance and coupling degree change shown in Table 1 are strictly measured. The specific measurement process is as follows:

[0035] 1. Initial performance measurements:

[0036] Before adjusting the coupler, first use a network analyzer to test the coupler to obtain its performance parameters in its original state. These parameters include but are not limited to key indicators such as coupling degree, insertion loss, and return loss. This step is to establish a baseline for comparing performance changes after subsequent adjustments.

[0037] 2. Establishment of electromagnetic field simulation model:

[0038] Based on the actual coupler structure, a 3D electromagnetic field simulation model of the coupler is constructed using finite element method (FEM) software (such as HFSS). In this model, the geometric parameters of the resonant rod and its surroundings, such as size, shape, and material properties, need to be accurately input.

[0039] 3. Parametric research and simulation analysis:

[0040] By changing the position or shape of the resonant rod in the simulation model, the changes in the resonant rod under different gears are simulated, and the changes in coupling and other related performance indicators after each adjustment are recorded. The goal of this step is to find the quantitative relationship between the change in the position of the resonant rod and the coupling, that is, how the coupling changes when each gear is adjusted.

[0041] 4. Formation of theoretical adjustment reference:

[0042] Based on the above simulation results, a set of theoretical adjustment rules are summarized, that is, how the coupling degree will change when the resonant rod is adjusted from one gear to another. This set of rules provides a scientific basis for subsequent practical operations.

[0043] 5. Experimental verification and calibration:

[0044] In the real environment, the coupler is physically adjusted according to the theoretical adjustment reference, and the performance parameters such as the coupling degree after adjustment are measured again using the network analyzer. The experimental data is compared with the simulation prediction value to check the consistency between the two. If there is a deviation, it is necessary to return to the simulation stage to further optimize the model settings or adjust the algorithm until the theory and practice can be well matched.

[0045] 6. Final confirmation:

[0046] After multiple iterations of optimization, once the simulation results are confirmed to be consistent with the actual situation, it can be considered that a stable relationship between the resonant rod adjustment amount and the coupling degree change has been found. The adjustment guide formed at this time can be applied to actual products to guide users to flexibly adjust the working state of the coupler according to their needs to ensure the accuracy of signal power distribution.

[0047] In summary, through the complete closed-loop verification process shown above, the present application can ensure the reliability of the coupler design.

[0048] In this embodiment, each adjustment of the coupling degree is achieved by changing the position of the adjustment knob 21. Each change in the gear position can cause a slight change in the distance between the main transmission line 3 and the coupling transmission line 7, thereby accurately controlling the coupling degree of the coupler. This mechanism allows the user to flexibly adjust the coupler performance according to actual needs to ensure the accuracy of signal power distribution.

[0049] In another exemplary embodiment, an adjusting member 23 is sleeved on the middle portion of the resonance rod body 22 , and the outer periphery of the adjusting member 23 is an irregular hexagon.

[0050] In this embodiment, the radius of the adjusting member 23 is not consistent, and the radius change of the adjusting member 23 corresponds to each adjustment gear on the adjusting knob 21, that is, the higher the gear on the adjusting knob 21, the larger the radius of the corresponding adjusting member 23, and the lower the gear, the smaller the radius of the corresponding adjusting member 23. Specifically, when the adjustment gear is gear 1, the radius of the corresponding adjusting member 23 is 0.2mm; when the adjustment gear is gear 2, the radius of the corresponding adjusting member 23 increases by 0.3mm, which is 0.5mm; when the adjustment gear is gear 3, the radius of the corresponding adjusting member 23 increases by 0.4mm, which is 0.9mm; when the adjustment gear is gear 4, the radius of the corresponding adjusting member 23 increases by 0.5mm, which is 1.4mm; when the adjustment gear is gear 5, the radius of the corresponding adjusting member 23 increases by 1mm, which is 2.4mm.

[0051] The working principle of the adjustment member 23 is as follows: each time the adjustment knob 21 is rotated to a new gear position, the adjustment member 23 will provide a preset radius, which determines the exact spacing between the main transmission line 3 and the coupling transmission line 7, thereby achieving precise control of the coupling degree between the main transmission line 3 and the coupling transmission line 7. Specifically, when the user rotates the adjustment knob 21 with an Allen wrench, he is actually rotating the entire adjustment member 23. Since the radius of the adjustment member 23 varies with the change of the circumferential position, the rotational action will cause the position of the resonant rod body 22 relative to other fixed components to change. This position change directly affects the physical distance between the main transmission line 3 and the coupling transmission line 7, thereby changing the electromagnetic field coupling strength between the two, and ultimately achieving the adjustability of the coupling degree.

[0052] The present application adopts such an adjustment member 23 with a variable radius, so that the coupler can achieve fast and precise coupling adjustment without an external power source. This not only simplifies the structure of the coupler and reduces the cost, but also improves the adjustment efficiency and accuracy of the coupling degree of the coupler. It is very suitable for application scenarios that require frequent adjustment of coupling parameters.

[0053] In another exemplary embodiment, a resistor 6 is disposed on the inner wall of the third side surface 12 of the cavity 1 .

[0054] In this embodiment, the coupling transmission line 7 needs to extract a small portion of energy from the RF signal received at the signal input terminal 4 and guide it to the resistor 6. The resistor 6 can absorb this part of the coupled signal energy to prevent it from being reflected back into the system and causing interference. In addition, in the coupler, the signal that is not absorbed or processed may be reflected back to the signal input terminal or other parts, increasing the standing wave ratio (VSWR), thereby affecting the coupling performance of the coupler. By directing the coupled signal to an appropriate load (i.e., resistor 6), these signals can be effectively terminated, avoiding unnecessary reflections, thereby optimizing the overall performance of the system.

[0055] It should be noted that, in the coupler shown in the present application, the resistance of the resistor is set to a standard value (50Ω to 500Ω). Setting it to a standard value helps the coupler described in the present application to achieve optimal impedance matching and minimize reflection loss.

[0056] In another exemplary embodiment, a coupling transmission line 7 is disposed in the cavity 1 , one end of the coupling transmission line 7 is connected to the signal coupling end 8 , and the other end of the coupling transmission line 7 is connected to the resistor 6 .

[0057] In this embodiment, the main function of the coupled transmission line 7 is to extract a small portion of energy from the radio frequency signal received by the signal input terminal 4 and guide this portion of energy to the resistor 6. The role of the resistor 6 is to absorb the coupled signal energy and prevent it from being reflected back into the coupler to avoid possible interference. Since this portion of the signal is directed to the independent resistor 6 instead of returning to the main transmission path, it helps to reduce the impact on the original signal quality and ensure the signal integrity on the main transmission path.

[0058] In addition, the coupled transmission line 7 is able to extract a certain proportion of the RF signal, which enables these signals to be used for a variety of monitoring and control purposes. For example, this part of the signal can be used for power measurement, fault detection, or as a feedback signal to serve the automatic control system. Therefore, the coupled transmission line 7 not only supports the monitoring and testing of the system, but also provides the necessary signal source for other auxiliary functions while maintaining the optimal performance of the main signal path.

[0059] In summary, the design of the coupled transmission line 7 is intended to achieve accurate extraction of the RF signal and effectively direct this part of the signal to a specific destination (such as resistor 6), thereby facilitating the monitoring, testing and other auxiliary functions of the system while ensuring the high performance and stability of the main signal path.

[0060] In another exemplary embodiment, a main transmission line 8 is further disposed in the cavity 1 , one end of the main transmission line 8 is connected to the signal input end 4 , and the other end of the main transmission line 8 is connected to the signal output end 5 .

[0061] In this embodiment, the main transmission line 3 is responsible for connecting the signal input terminal 4 and the signal output terminal 5, and its core function is to provide an efficient, low-loss transmission channel for the RF signal from the input terminal to the output terminal. This channel is designed to minimize energy loss and waveform distortion during signal transmission to ensure the fidelity and integrity of the signal. That is, the role of the main transmission line 3 is to construct an optimized path so that the RF signal can be transmitted from the input terminal to the output terminal with minimal attenuation and highest fidelity inside the coupler. This not only improves the signal transmission efficiency, but also effectively maintains the quality of the signal and avoids unnecessary distortion or attenuation.

[0062] Next, the present application compares the present solution with the traditional coupler through specific experiments, and the specific experiments are as follows:

[0063] The experimental equipment includes: a network analyzer, a conventional motor drive coupler (as a control group), an adjustable resonant rod coupler in this scheme, and an Allen wrench (used to adjust the coupler in this scheme).

[0064] Experimental environment: The room temperature is controlled at 25℃±2℃, the relative humidity is 40%-60%, and it is carried out in a shielded room to reduce external interference.

[0065] Experimental steps:

[0066] Step 1: Initial state measurement:

[0067] Use a network analyzer to measure the initial coupling degree of the two couplers (traditional motor drive coupler and the coupler of this solution) and record the original coupling degree values.

[0068] Step 2: Set target coupling:

[0069] A target coupling value is set, for example, from 20 dB to 18 dB, to compare the adjustment time and accuracy required for the two couplers to achieve the target.

[0070] Step 3: Conventional Motor Drive Coupler Test:

[0071] Operate the conventional motor drive coupler according to the instructions provided by the manufacturer, and gradually adjust its internal structure until the coupling degree reaches or approaches the target value.

[0072] Record the time required for each adjustment, the change in coupling degree, and the target coupling degree finally achieved.

[0073] Step 4: Test of the tunable resonant rod coupler of this scheme:

[0074] Use an Allen wrench to rotate the adjustment knob in this solution, and adjust the coupling degree in sequence according to the gear changes given in Table 1 until the target value is reached or approached.

[0075] Also record the time required for each adjustment, the change in coupling, and the target coupling finally achieved.

[0076] Step 5: Data Analysis:

[0077] The changing trend of coupling degree of the two couplers during the adjustment process, the time required for each adjustment, and the final achieved coupling degree accuracy were compared.

[0078] The specific experimental results are shown in Table 2:

[0079] Table 2

[0080]

[0081] As can be seen from Table 2, regarding the adjustment speed: the traditional motor-driven coupler takes about 30 seconds to complete a complete adjustment process, while the adjustable resonant rod coupler in this solution only takes about 5 seconds to complete the same operation. This shows that this solution has a faster adjustment speed. Regarding the adjustment accuracy: the traditional motor-driven coupler finally achieved the target coupling degree of 18.0±0.3dB after multiple adjustments, while the coupler in this solution reached 18.0±0.1dB more accurately. This result shows that this solution provides higher adjustment accuracy.

[0082] Through the above experiments, it can be clearly seen that the adjustable resonant rod coupler in this application can not only complete the adjustment of the coupling degree in a short time, but also achieve a more accurate target coupling degree setting. This improvement is due to its unique mechanical design and the fact that no external power source is required, allowing users to directly and quickly fine-tune the coupling degree, thereby improving work efficiency and ensuring communication quality.

[0083] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A coupler with an adjustable resonant rod, characterized in that: The coupler comprises: A cavity (1), wherein the upper end surface of the cavity (1) is provided with a cover plate (9); A signal input terminal (4) is arranged on the outer wall of a first side surface (10) of the cavity (1), and a signal output terminal (5) is arranged on the outer wall of a second side surface (11) of the cavity (1), wherein the first side surface (10) and the second side surface (11) are opposite to each other; a signal coupling terminal (8) is arranged on the outer wall of a third side surface (12) of the cavity (1), and the signal input terminal (4), the signal output terminal (5) and the signal coupling terminal (8) are respectively die-casted integrally with the cavity (1); The cover plate (9) is provided with a through hole, and an adjustable resonance rod (2) is provided through the through hole, and the adjustable resonance rod (2) is used to adjust the coupling degree of the coupler.

2. A coupler with an adjustable resonant rod according to claim 1, characterized in that: The adjustable resonant rod (2) comprises: A resonance rod body (22), wherein the first end of the resonance rod body (22) is arranged in the cavity (1), and the second end of the resonance rod body (22) extends outside the through hole and is fixed with an adjustment knob (21).

3. A coupler with an adjustable resonant rod according to claim 2, characterized in that: The middle part of the adjusting knob (21) is a hexagonal groove, and each side of the hexagonal groove is correspondingly provided with an adjusting gear position.

4. A coupler with an adjustable resonant rod according to claim 3, characterized in that: An adjusting piece (23) is sleeved on the middle part of the resonance rod body (22), and the outer periphery of the adjusting piece (23) is an irregular hexagon.

5. A coupler with an adjustable resonant rod according to claim 4, characterized in that: The radius of the adjusting member (23) corresponds one-to-one to the adjusting gear position.

6. A coupler with an adjustable resonant rod according to claim 5, characterized in that: The radius of the adjusting member (23) is 0.2 mm to 2.4 mm.

7. A coupler with an adjustable resonant rod according to claim 1, characterized in that: A resistor (6) is provided on the inner wall of the third side surface (12) of the cavity (1).

8. A coupler with an adjustable resonant rod according to claim 7, characterized in that: The resistance of the resistor (6) is 50Ω to 500Ω.

9. The coupler with an adjustable resonant rod according to claim 7, characterized in that: A coupling transmission line (7) is arranged in the cavity (1), one end of the coupling transmission line (7) is connected to the signal coupling end (8), and the other end of the coupling transmission line (7) is connected to the resistor (6).

10. The coupler with an adjustable resonant rod according to claim 1, characterized in that: A main transmission line (8) is also provided in the cavity (1), one end of the main transmission line (8) is connected to the signal input end (4), and the other end of the main transmission line (8) is connected to the signal output end (5).

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