Balun transformer

Abstract

The utility model discloses a balun transformer which comprises a base, a coil and a plurality of pins, the coil is arranged on the base and electrically connected with the pins, the pins are arranged on the two sides of the base at intervals in the extending direction of the base, and the pins are arranged on the two sides of the base at intervals in the extending direction of the base. The distance between every two adjacent pins on one side of the base is 1.27 + / -0.25 mm, the length sizes of the multiple pins are consistent and are 1.11 + / -0.25 mm, and the width sizes of the multiple pins are consistent and are 0.90 + / -0.25 mm. According to the balun transformer, the sizes and the distances of the pins are accurately designed, so that good balance of the balun transformer in electrical performance can be achieved, the balun transformer is reliable to use, and the problem that the use performance of an existing balun transformer is easily affected due to unreasonable size design of the pins is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of communications, in particular to a balun transformer. Background Art

[0002] The balun transformer is a key component widely used in antenna technology and electronic circuits. It is primarily used to solve the connection problem between balanced antennas (such as dipole antennas) and unbalanced transmission lines (such as coaxial cables), achieving balanced-unbalanced conversion and performing impedance transformation. Balun transformers operate based on Faraday's law of electromagnetic induction. Through the design of the windings and core, they utilize electromagnetic induction to change the AC voltage. In antenna design, balun transformers can intercept high-frequency currents flowing from the oscillator through the cable shield, improving the antenna's radiation efficiency and stability. Furthermore, balun transformers are moisture-resistant and easy to maintain, making them suitable for use in a variety of power transmission and distribution locations, such as subways, high-rise buildings, and airports. With the continuous advancement of communications technology, balun transformers are increasingly used in wireless communications, radio frequency circuits, and other fields, and their performance has a significant impact on the overall performance of the system.

[0003] Existing balun transformers are prone to performance issues due to improper pin size design. For example, if the pin size is designed too small, it will limit the current flow, resulting in increased power loss, severe heat generation, and shortened service life in high-power applications. Conversely, if the pin size is designed too large, it increases the difficulty of welding, affecting the reliability and stability of the product, and even causing problems such as poor welding. At the same time, unreasonable pin spacing can easily increase interference between signals and reduce the integrity of the transmitted signal. Therefore, the purpose is to provide a new method for the structural design layout of the pins of the balun transformer, so as to improve the performance of the balun transformer through reasonable size design. Utility Model Content

[0004] The main purpose of the utility model is to provide a balun transformer, aiming to solve the problem that the existing balun transformer is easily affected by the unreasonable size design of its pins, which affects the performance.

[0005] To achieve the above-mentioned purpose, the present invention provides a balun transformer, comprising a base, a coil and a plurality of pins, wherein the coil is arranged on the base and electrically connected to the plurality of pins, and the plurality of pins are respectively arranged on both sides of the base along the extension direction of the base, wherein the spacing between two adjacent pins on one side of the base is 1.27±0.25mm, the length dimensions of the plurality of pins are consistent and are 1.11±0.25mm, and the width dimensions of the plurality of pins are consistent and are 0.90±0.25mm.

[0006] Preferably, the length dimension of the base is 4.21±0.25 mm, and the width dimension of the base is 4.21±0.25 mm.

[0007] Preferably, the height dimension of the balun transformer is 2.40±0.25 mm.

[0008] Beneficial effects:

[0009] 1. In a balun transformer of the present invention, the spacing between the three pins set on one side of the base is 1.27±0.25mm. By precisely controlling the spacing between the pins, it can not only ensure the stability and reliability of the electrical connection, but also reduce signal interference and noise, and improve the integrity of the transmitted signal. In addition, this spacing also conforms to common PCB layout standards, facilitating integration and connection with other electronic components.

[0010] 2. In a balun transformer of the present invention, since the lengths of several pins are consistent and are 1.11±0.25 mm, not only the lengths of the signal transmission paths between the pins are similar, reducing the phase difference and loss during signal transmission, but also the mechanical strength of the several pins can be ensured to provide better mechanical support, and help improve stability and durability.

[0011] 3. In a balun transformer of the present invention, the width dimensions of several pins are consistent and are 0.90±0.25 mm, so that several pins have a larger width dimension, which not only provides a larger current channel, helps to reduce current density and reduce heat generation, but also extends the service life and reduces welding difficulty, which is conducive to welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0013] Figure 1 This is a structural schematic diagram of a balun transformer in a first perspective according to an embodiment of the present invention;

[0014] Figure 2 This is a structural schematic diagram of a balun transformer according to an embodiment of the present invention at a second viewing angle;

[0015] Figure 3 This is a schematic structural diagram of a balun transformer in accordance with an embodiment of the present invention from a third viewing angle;

[0016] Figure 4 This is an electrical structure diagram of a balun transformer according to an embodiment of the present utility model;

[0017] Figure 5 This is an electrical schematic diagram of a balun transformer according to an embodiment of the present invention;

[0018] Figure 6 This is an insertion loss curve diagram of a balun transformer according to an embodiment of the present invention;

[0019] Figure 7 This is an input return loss curve diagram of a balun transformer according to an embodiment of the present invention;

[0020] Figure 8 This is an amplitude balance curve diagram of a balun transformer according to an embodiment of the present invention;

[0021] Figure 9 This is a phase balance curve diagram of a balun transformer according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without making any creative efforts shall fall within the scope of protection of the present application.

[0024] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0025] In the description of this application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the product of the application is usually placed when in use. It is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on this application. In addition, if the terms "first", "second", etc. appear in the description of this application, they are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] Furthermore, the use of terms such as "horizontal" and "vertical" in the description of this application does not necessarily imply that a component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical" and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0027] It should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. A person of ordinary skill in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0028] Example 1:

[0029] The utility model provides a balun transformer.

[0030] In one embodiment of the present invention, a balun transformer includes a base, a coil, and a plurality of pins. The coil is arranged on the base and electrically connected to the plurality of pins. The plurality of pins are respectively arranged on both sides of the base along an extension direction of the base, wherein the spacing between two adjacent pins on one side of the base is 1.27±0.25mm, the length dimensions of the plurality of pins are consistent and are 1.11±0.25mm, and the width dimensions of the plurality of pins are consistent and are 0.90±0.25mm.

[0031] Specifically, if Figures 1 to 9As shown, in a balun transformer of the present invention, the base serves as the main support structure, which can provide a stable support structure for the coil and pins to ensure that the coil and several pins are firmly installed and maintain good electrical connection. Furthermore, since the balun transformer needs to ensure impedance matching between the unbalanced port and the balanced port to reduce signal reflection and loss, in a balun transformer of the present invention, several pins are respectively arranged on both sides of the base along the extension direction of the base, wherein one side of the base is provided with three pins for connecting balanced signals, i.e. differential signals. Of these three pins, two pins are used to connect the positive and negative ends of the differential signal, and the other pin can be used for grounding, as a reference potential, providing additional impedance matching or achieving common-mode suppression functions; at the same time, two pins are provided on the other side of the base, one pin is used for signal input or output, and the other is used for grounding or as a reference potential. Obviously, by adopting the structural layout of the above-mentioned several pins, it is possible to ensure effective conversion between unbalanced signals and balanced signals, while achieving key performances such as impedance matching, signal integrity and common-mode suppression.

[0032] It is understandable that since the size of the pin spacing directly affects the electrical performance and signal transmission quality of the balun transformer, if the pin spacing is too small, it is easy to cause the electrical connection to be too tight, increasing the risk of short circuit and signal crosstalk; and if the pin spacing is too large, it is easy to reduce the compactness and integration of the balun transformer, which is not conducive to achieving high-performance circuit design in a limited space, and is easy to increase the length of the signal transmission path and increase losses. Therefore, in a balun transformer of the present invention, the spacing between the three pins set on one side of the base is 1.27±0.25mm. By precisely controlling the spacing between the pins, it is not only possible to ensure the stability and reliability of the electrical connection, but also to reduce signal interference and noise, and improve the integrity of the transmitted signal. In addition, this spacing also complies with common PCB layout standards, which is convenient for integration and connection with other electronic components. Furthermore, since the lengths of several pins are consistent and are 1.11±0.25mm, not only the lengths of the signal transmission paths between the pins are similar, reducing the phase difference and loss during signal transmission, but also the mechanical strength of several pins can be guaranteed to provide better mechanical support, and help improve stability and durability; at the same time, since the width of the pins directly affects the current carrying capacity of the present invention, in the present invention, the widths of several pins are consistent and are 0.90±0.25mm, so that several pins have a larger width, which not only provides a larger current channel, helps to reduce current density and reduce heat generation, but also extends the service life and reduces the difficulty of welding, which is conducive to welding. It can be seen that the present invention is a balun transformer that can achieve a good balance in electrical performance and is reliable in use by precisely designing the size and spacing of the pins, solving the problem that the existing balun transformer is easily affected by the unreasonable size design of its pins and affects its performance.

[0033] It is worth noting that the utility model of a balun transformer can be optimized and tuned through simulation software in the actual production process, and its test simulation results are shown in FIG. Figures 6 to 9 It can be seen that the test data can be seen from the following table:

[0034] 3E(A3(CFCAONS@25℃:

[0035]

[0036] In one embodiment, if Figure 1 and Figure 2As shown, the length dimension of the base is 4.21±0.25mm, and the width dimension of the base is 4.21±0.25mm. It can be understood that since the size of the base will directly affect the inductance and capacitance effects as well as the impedance matching and frequency response characteristics inside the balun transformer, that is, a smaller base size will increase the inductance value, while a larger base size will reduce the inductance value. The present invention limits the length and width dimensions of the base to 4.21±0.25mm respectively, which is not only conducive to achieving a good balance in electrical performance of the present invention and reliable use, but also enables the base to have a larger heat dissipation area, thereby helping to reduce the temperature of the balun transformer during operation, thereby improving the stability and reliability of the present invention and extending its service life.

[0037] In one embodiment, if Figure 1 and Figure 3 As shown, the height dimension of the balun transformer is 2.40±0.25mm. It can be understood that when the height of the balun transformer is shorter, the inductance value will increase due to the tighter coupling between the coils; conversely, when the height of the balun transformer is higher, the inductance value will decrease due to the looser coupling between the coils. This change will affect the impedance matching and frequency response characteristics of the balun transformer. Therefore, in the utility model, a height dimension of a balun transformer is designed to be 2.40±0.25mm, which not only ensures that the tightness of the coil is in a good preset state, helps to achieve a good balance in electrical performance, but also ensures the transmission efficiency of the signal and the coupling effect between the coils.

[0038] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A balun transformer, comprising a base, a coil and a plurality of pins, characterized in that: The coil is arranged on the base and electrically connected to the plurality of pins, and the plurality of pins are respectively arranged on both sides of the base along the extension direction of the base, wherein the spacing between two adjacent pins on one side of the base is 1.27±0.25mm, the length dimensions of the plurality of pins are consistent and are 1.11±0.25mm, and the width dimensions of the plurality of pins are consistent and are 0.90±0.25mm.

2. A balun transformer according to claim 1, characterized in that: The length dimension of the base is 4.21±0.25 mm, and the width dimension of the base is 4.21±0.25 mm.

3. A balun transformer according to claim 2, characterized in that: The height of the balun transformer is 2.40±0.25 mm.

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