A connecting ferrule for dielectric resonators

Abstract

The application belongs to the technical field of dielectric resonator, and provides a connecting plug for dielectric resonator, which comprises a connecting part and a plug-in part, and the connecting part and the plug-in part are integrally formed, wherein the plug-in part is a fork structure comprising a first plug-in finger and a second plug-in finger; when the plug-in part is inserted into the dielectric resonator provided with an inner hole, the first plug-in finger is not electrically connected with the dielectric resonator, and the second plug-in finger is electrically connected with the dielectric resonator. The application provides a connecting plug for dielectric resonator suitable for variable temperature environment, which can avoid the virtual connection of the welding part caused by the micro deformation of the connecting plug affected by temperature, and further affect the stability of the electrical performance of the dielectric resonator.

Description

Technical Field

[0001] This application belongs to the field of dielectric resonator technology, and particularly relates to a connecting insert for a dielectric resonator. Background Technology

[0002] The connecting core of the dielectric resonator serves to connect the inner hole of the dielectric resonator to the external circuit, and is an essential connecting component for the dielectric resonator to function properly.

[0003] Most existing dielectric resonators use abutment fixing or multiple welding methods to electrically connect the connecting core to the dielectric resonator. When the external temperature changes, the connecting core will undergo slight deformation due to temperature, which will cause the electrical connection to become loose, thus affecting the stability of the electrical performance of the dielectric resonator.

[0004] Therefore, there is an urgent need for a connection core suitable for maintaining the stable electrical performance of dielectric resonators under varying temperature environments. Summary of the Invention

[0005] To overcome the problems existing in the related technologies, this application provides a connecting core for a dielectric resonator, which can avoid the occurrence of incomplete connections at the welding points when the connecting core undergoes slight deformation due to temperature, thereby affecting the stability of the electrical performance of the dielectric resonator.

[0006] This application is achieved through the following technical solution:

[0007] This application provides a connecting insert for a dielectric resonator, including: a connecting part 1 and a plug-in part 2; the connecting part 1 and the plug-in part 2 are integrally formed, wherein the plug-in part 2 has a fork-shaped structure, including a first insert finger 21 and a second insert finger 22; when the plug-in part 2 is inserted into a dielectric resonator with an inner hole, the first insert finger 21 is not electrically connected to the dielectric resonator, and the second insert finger 22 is electrically connected to the dielectric resonator.

[0008] In one possible implementation, the first insertion finger 21 and the second insertion finger 22 extend away from the connecting portion 1 in the same direction. The lower surface of the first insertion finger 21 does not contact the upper surface of the second insertion finger 22. When the insertion portion 2 is inserted into the dielectric resonator with an inner hole, the upper surface of the first insertion finger 21 and the lower surface of the second insertion finger 22 respectively engage with the inner hole of the dielectric resonator with clearance.

[0009] In one possible implementation, a welding layer is fixedly provided at the target position of the first insertion finger 21, wherein the target position is the corresponding position that matches the gap between the insertion part 2 and the inner hole of the dielectric resonator when the insertion part 2 is inserted into the inner hole of the dielectric resonator.

[0010] In one possible implementation, the second interposer 22 and the connecting portion 1 form a continuous conductor, and when the second interposer 22 is welded or glued to the inner hole of the dielectric resonator, the connecting core is electrically connected to the inner hole of the dielectric resonator.

[0011] In one possible implementation, the connecting core further includes an external portion 3, which is integrally formed with the connecting portion 1.

[0012] In one possible implementation, the electrical connection point of the external part 3 to the external circuit extends away from the plug part 2 and in the opposite direction.

[0013] In one possible implementation, the electrical connection end of the external part 3 to the external circuit extends perpendicularly to the plug part 2.

[0014] In one possible implementation, the connection between the connecting part 1 and the plug-in part 2 is designed with a boss to limit the depth of the plug-in part 2 inserted into the dielectric resonator.

[0015] In one possible implementation, the substrate for the connecting ferrule is made of a metal conductor.

[0016] In one possible implementation, the substrate surface of the connecting ferrule has a coating that improves electrical conductivity.

[0017] The beneficial effects of the embodiments in this application compared with the prior art are:

[0018] This application provides a connecting core for a dielectric resonator. The insertion part of the connecting core adopts a fork-shaped structure of a first insertion finger and a second insertion finger, which can maintain a certain structural strength after the connecting core is inserted into the inner hole of the dielectric resonator.

[0019] Furthermore, the lower surface of the first insertion finger and the upper surface of the second insertion finger do not contact each other, which allows the connecting core to have a certain stress relief function, preventing the silver layer in the inner hole of the dielectric resonator from falling off due to the stress relief of the connecting core, or even causing the ceramic body of the dielectric resonator to crack, which would affect the reliability of the dielectric resonator.

[0020] Meanwhile, the first interposer is not electrically connected to the dielectric resonator, while the second interposer is electrically connected to the dielectric resonator. This further avoids the situation where the welding part becomes loose due to the slight deformation of the connecting core caused by temperature, which in turn affects the stability of the electrical performance of the dielectric resonator.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this specification. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a top view schematic diagram of a connecting ferrule for a dielectric resonator provided in an embodiment of this application;

[0024] Figure 2 This is a front view schematic diagram of a connecting ferrule for a dielectric resonator provided in an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the electrical connection between a dielectric resonator and a connecting ferrule provided in an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of a first insert finger having a solder resist layer provided in an embodiment of this application;

[0027] Figure 5 This is a front view schematic diagram of another connecting ferrule for a dielectric resonator provided in an embodiment of this application;

[0028] Figure 6 This is a front view schematic diagram of another connecting ferrule for a dielectric resonator provided in an embodiment of this application;

[0029] Figure 7 This is a schematic model of a three-dimensional simulation of a connecting ferrule assembled in a dielectric resonator according to an embodiment of this application;

[0030] Figure 8 This is a simulation curve of the change in conductivity of the connecting ferrule provided in an embodiment of this application;

[0031] Figure 9 This refers to the Q value of the resonator when the first interdigital conductivity is fixed at 0, as provided in the embodiments of this application.

[0032] In the figure: 1 Connecting part; 2 Insertion part; 3 External part; 4 Dielectric resonator; 21 First insertion finger; 22 Second insertion finger; 211 Solder mask layer. Detailed Implementation

[0033] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of this application. However, those skilled in the art will understand that this application may also be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods have been omitted so as not to obscure the description of this application with unnecessary detail.

[0034] It should be understood that, when used in this application specification and the appended claims, the term "comprising" indicates the presence of the described features, integrals, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or a collection thereof.

[0035] It should also be understood that the term “and / or” as used in this application specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0036] As used in this application specification and the appended claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if detected [the described condition or event]" may be interpreted, depending on the context, as meaning "once determined," "in response to determination," "once detected [the described condition or event]," or "in response to detection [the described condition or event]."

[0037] Furthermore, in the description of this application and the appended claims, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0038] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0039] Existing technology discloses a dielectric resonator connection terminal, which is fixed to the inner hole of the dielectric resonator by the elasticity of two plug arms. This method of fixing not only damages the plating of the inner hole of the dielectric resonator, but in severe cases, it may even cause the plating to fall off. Moreover, when the plug arms are stressed or become worn and lack elasticity, it may cause a loose connection with the dielectric resonator. Furthermore, when the dielectric resonator is dropped or subjected to significant vibration, this method of fixing may loosen, thereby affecting the reliability of the connection.

[0040] To address the aforementioned problems, this application provides a connecting insert for a dielectric resonator. To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described below are merely illustrative of this application and are not intended to limit its scope.

[0041] The following is combined with Figure 1 and Figure 2 This application provides a detailed description of a connecting insert for a dielectric resonator that is claimed in this application.

[0042] Figure 1 This is a top view schematic diagram of a connecting ferrule for a dielectric resonator provided in an embodiment of this application.

[0043] Reference Figure 1 The connecting core includes a connecting part 1 and a plug-in part 2. The connecting part 1 and the plug-in part 2 are integrally formed.

[0044] Figure 2 This is a front view schematic diagram of a connecting ferrule for a dielectric resonator provided in an embodiment of this application.

[0045] Reference Figure 2 The insertion part 2 has a fork-shaped structure, consisting of a first insertion finger 21 and a second insertion finger 22. The first insertion finger 21 and the second insertion finger 22 extend away from the connecting part 1. Moreover, the first insertion finger 21 and the second insertion finger 22 extend in the same direction.

[0046] The first finger 21 and its lower surface are separated from the upper surface of the second finger 22, and there is no direct contact. When the connecting core releases stress, the pressure on the inner hole of the dielectric resonator 4 is reduced.

[0047] Figure 3 This is a schematic diagram of the electrical connection between a dielectric resonator and a connecting ferrule provided in an embodiment of this application.

[0048] Reference Figure 3 When the connecting core is inserted into the dielectric resonator 4 which has an inner hole, the connecting part 1 is located outside the dielectric resonator 4 and can be electrically connected to an external circuit.

[0049] When the connecting core is inserted into the dielectric resonator 4 with an inner hole, the insertion part 2 is built into the inner hole of the dielectric resonator 4. The upper surface of the first insertion finger 21 and the lower surface of the second insertion finger 22 are respectively in clearance fit with the inner hole of the dielectric resonator 4. The so-called clearance fit means that the upper surface of the first insertion finger 21 and the lower surface of the second insertion finger 22 have a gap (including the minimum gap is zero) to avoid damage to the plating of the inner hole of the dielectric resonator 4.

[0050] Meanwhile, the first finger 21 is not electrically connected to the dielectric resonator 4, while the second finger 22 is electrically connected to the dielectric resonator 4. When the connecting core undergoes slight deformation due to temperature, since the first finger 21 is not electrically connected to the dielectric resonator 4, the slight deformation can be guided towards the first finger 21, preventing slight deformation at the welding point of the second finger 22, thus avoiding a loose connection and affecting the stability of the electrical performance of the dielectric resonator 4.

[0051] It should be noted that, Figure 3 The dielectric resonator 4 shown is only a schematic diagram. In real life, the dielectric resonator 4 can be a cube, a cylinder or other shapes. As long as the dielectric resonator 4 has an inner hole, it is suitable for the connection ferrule provided in this application.

[0052] Figure 4 This is a schematic diagram of a first insertion finger provided in an embodiment of this application, which has a solder resist layer.

[0053] Reference Figure 4 A solder mask layer 211 is fixedly provided at the target position of the first insertion finger 21. The target position is the position corresponding to the clearance fit between the insertion part 2 and the inner hole of the dielectric resonator 4 when the insertion part 2 is inserted into the inner hole of the dielectric resonator 4.

[0054] The purpose of providing a solder resist layer 211 on the first insertion finger 21 is twofold: firstly, to prevent the first insertion finger 21 from being soldered to the dielectric resonator 4, thus failing to guide stress release; secondly, the solder resist layer 211 also has an insulating function, which can prevent electrical connection between the first insertion finger 21 and the conductive plating layer inside the dielectric resonator 4. If an electrical connection occurs, it will affect the stability of the electrical performance of the dielectric resonator 4.

[0055] It should be noted that since solder resist is a mature existing technology, this application does not further limit the process and material of the solder resist. As long as it can simultaneously achieve the effects of preventing welding and electrical insulation, it is within the scope of protection of this application.

[0056] For example, since the plug portion 2 and the connecting portion 1 are integrally formed to form a continuous conductor, when the second plug finger 22 is welded or glued to the inner hole of the dielectric resonator 4, the connecting plug is electrically connected to the inner hole of the dielectric resonator 4.

[0057] In a real-world scenario, a solder mask layer 211 is applied to the target position of the first insertion finger 21. After covering the second insertion finger 22 with solder or adhesive material, the insertion part 2 is inserted into the inner hole of the dielectric resonator 4. Because the insertion part 2 and the inner hole of the dielectric resonator 4 have a clearance fit, it can be smoothly inserted without damaging the inner hole plating. Furthermore, because the connecting core is small in size (only a few millimeters long) and very light in weight (not exceeding 0.1 grams), and because the insertion part 2 is covered with an adhesive solder or adhesive material, the inserted insertion part 2 will not move within the inner hole of the dielectric resonator 4. Finally, the connecting core is fixed to the dielectric resonator 4 by reflow soldering or other methods, thus achieving an electrical connection between the connecting core and the dielectric resonator 4.

[0058] Reference Figure 5 and Figure 6 This application also provides two other types of connector inserts for dielectric resonators, suitable for electrical connections in a variety of external circuits.

[0059] exist Figure 5 The connecting core also includes an external portion 3. The external portion 3, the connecting portion 1, and the plug portion 2 are integrally formed. The external portion 3 can be electrically connected to an external circuit.

[0060] Optionally, a solder resist layer 211 is fixedly provided at the target position of the first insertion finger 21.

[0061] In some embodiments, the electrical connection terminal of the external part 3 to the external circuit extends away from the plug part 2, and the direction of extension is opposite.

[0062] exist Figure 6 The connecting core also includes an external portion 3. The external portion 3, the connecting portion 1, and the plug portion 2 are integrally formed. The external portion 3 can be electrically connected to an external circuit.

[0063] Optionally, a solder resist layer 211 is fixedly provided at the target position of the first insertion finger 21.

[0064] In some embodiments, the electrical connection end of the external part 3 to the external circuit extends in a direction perpendicular to the plug part 2.

[0065] It should be noted that, Figure 5 and Figure 6 This is merely an example of the external portion 3's outline and is not limited to the external portion 3 being perpendicular or parallel to the insertion portion 2. The direction and angle of the external portion 3's electrical connection to the external circuit can be adapted to meet the actual needs of the external circuit. This application will not elaborate further on the direction and angle of the external portion's electrical connection.

[0066] In some embodiments, in the connecting insert for the dielectric resonator disclosed in this application, the connection point between the connecting part 1 and the insertion part 2 is designed with a boss to control the depth of the insertion part 2 into the dielectric resonator 4, thereby serving as a limiting mechanism.

[0067] It should be noted that while the design principle of using a boss is to achieve the purpose of limiting movement, other shapes can also be used to achieve the same purpose of limiting movement. This application will not impose any further limitations on this.

[0068] In some embodiments, the integrally formed substrate of the dielectric resonator connecting core disclosed in this application is a metal conductor material, which has certain hardness requirements.

[0069] Optionally, the metal conductor material can be gold, silver, copper, or other alloys, and this application does not impose further limitations.

[0070] In some embodiments, the substrate surface of the dielectric resonator connecting core of this application is further coated with a coating to improve conductivity.

[0071] Optionally, the coating that improves electrical conductivity can be silver, gold + nickel, or others, and this application does not impose further limitations.

[0072] To verify that the connecting insert for the dielectric resonator disclosed in this application can maintain the electrical performance stability of the dielectric resonator under varying temperature environments, this application also establishes a three-dimensional simulation model of the connecting insert to analyze the changes in the electrical performance of the dielectric resonator under varying temperature environments, and performs simulation verification on the connecting insert protected in this application. The process is as follows:

[0073] Figure 7 The established 3D simulation model is shown. The outer rectangle represents the dielectric resonator, and the connecting pin is inserted into the dielectric resonator. The second finger of the connecting pin is soldered to the inner hole of the dielectric resonator after being coated with solder. The second finger maintains good contact with the inner hole of the dielectric resonator without any loose connections. The first finger only maintains contact with the inner hole of the dielectric resonator and is not soldered. When the external temperature changes, the connecting pin undergoes slight deformation. Since the first finger is not soldered to the dielectric resonator, it undergoes slight deformation, changing the degree of contact with the dielectric resonator and thus creating a loose connection. The effect of this loose connection can be equivalent to a change in the conductivity of the first finger. Therefore, a small virtual block model is set at the front end of the first finger to simulate the degree of contact between the first finger and the inner hole of the dielectric resonator. The change in the electrical performance of the dielectric resonator is analyzed by setting the conductivity of the small block model.

[0074] If the conductivity of the small model is 0, it is equivalent to the first interpolation being in an insulating state with a solder mask layer. If the conductivity of the small model is large, it is equivalent to the first interpolation and the dielectric resonator having good conductivity. If the conductivity of the small model is in the middle value, it can be equivalent to the degree of loose connection between the first interpolation and the dielectric resonator.

[0075] based on Figure 7The conductivity of the small-scale model was parameterized, with values ​​ranging from 0 to 1000. Simulation results can be found in the simulation curves. Figure 8 , Figure 8 The horizontal axis of the curve represents conductivity, and the vertical axis represents the Q-value (quality factor) of the dielectric resonator.

[0076] from Figure 8 As can be seen, when the conductivity is 0, that is, when the first interposer is insulated from the dielectric resonator, the Q value of the dielectric resonator is normal (about 380). As the conductivity increases, the degree of loose connection between the first interposer and the dielectric resonator changes, and the Q value decreases, that is, the electrical performance of the dielectric resonator also decreases. When the conductivity is above 1000, that is, when the first interposer and the dielectric resonator conduct electricity well, the Q value of the dielectric resonator returns to normal.

[0077] In other words, when the conductivity of the first interdigitator is 0 (i.e., in the insulating state) and greater than 1000 (i.e., in the conducting state), the Q value of the resonator is normally stable and does not change with temperature. However, when the conductivity is between 0 and 1000, the Q value changes with the conductivity, and this change in Q value indicates a change in the electrical performance of the dielectric resonator, meaning that temperature changes affect the electrical performance.

[0078] Therefore, based on the above analysis, it can be concluded that either insulation of the first insertion finger or good contact (no loose connection) of the first insertion finger can stabilize the performance of the dielectric resonator under varying temperatures. If the first insertion finger is soldered, the overall structure and assembly method of the insertion core will be stressed after soldering, potentially leading to reliability issues such as the detachment of the silver layer inside the dielectric resonator. Therefore, by applying a solder resist layer to the first insertion finger at the target position where the first insertion finger contacts the inner hole of the dielectric resonator, the first insertion finger is in contact with the inner hole of the dielectric resonator but remains insulated. That is, the equivalent conductivity at the target position where the first insertion finger contacts the inner hole is 0, which can achieve a stable Q value of the dielectric resonator under varying temperatures, i.e., a stable electrical performance.

[0079] according to Figure 7 The simulation results of the three-dimensional model, after fixing the conductivity of the first finger of the connecting ferrule to 0, are as follows: Figure 9 As shown, the Q value of the dielectric resonator can remain stable.

[0080] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A connecting ferrule for a dielectric resonator, characterized in that, include: Connecting part (1) and plug-in part (2); The connecting part (1) and the plug-in part (2) are integrally formed, wherein the plug-in part (2) has a fork-shaped structure, including a first insert finger (21) and a second insert finger (22); the lower surface of the first insert finger (21) does not contact the upper surface of the second insert finger (22); When the plug (2) is inserted into the dielectric resonator with an inner hole, the first insert (21) is not electrically connected to the dielectric resonator, and the second insert (22) is electrically connected to the dielectric resonator; the second insert (22) and the connecting part (1) form a continuous conductor, and when the second insert (22) is welded or glued to the inner hole of the dielectric resonator, the connecting core is electrically connected to the inner hole of the dielectric resonator; a solder resist layer is fixedly provided at the target position of the first insert, wherein the target position is the corresponding position of the gap fit with the inner hole of the dielectric resonator when the plug is inserted into the inner hole of the dielectric resonator; the gap fit is that the upper surface of the first insert (21) and the lower surface of the second insert (22) are respectively gap-fitted with the inner hole of the dielectric resonator.

2. The connecting ferrule for a dielectric resonator as described in claim 1, characterized in that, The first insertion finger (21) and the second insertion finger (22) extend away from the connecting part (1) and extend in the same direction.

3. The connecting ferrule for a dielectric resonator as described in claim 1, characterized in that, The connecting core also includes an external part (3); The external part (3), the connecting part (1) and the plug-in part (2) are integrally formed.

4. The connecting ferrule for a dielectric resonator as described in claim 3, characterized in that, The external part (3) extends away from the plug part (2) and in the opposite direction to the electrical connection point of the external circuit.

5. The connecting ferrule for a dielectric resonator as described in claim 3, characterized in that, The external part (3) extends in a direction perpendicular to the plug part (2) to the electrical connection end with the external circuit.

6. The connecting ferrule for a dielectric resonator as described in claim 1, characterized in that, The connection between the connecting part (1) and the plug-in part (2) is provided with a boss design to limit the depth of the plug-in part (2) inserted into the dielectric resonator.

7. The connecting ferrule for a dielectric resonator as described in any one of claims 1-6, characterized in that, The base material of the connecting core is a metal conductor.

8. The connecting ferrule for a dielectric resonator as described in any one of claims 1-6, characterized in that, The substrate surface of the connecting core has a coating that improves electrical conductivity.

Images