Broadband antenna and debugging method thereof

Abstract

The invention discloses a broadband antenna and a debugging method thereof, and relates to the field of communication. The broadband antenna comprises an open-circuit section, a short-circuit section and a matching network, the matching network is connected between the open-circuit section and the short-circuit section, the short-circuit section comprises a short-circuit section antenna body and a feeder line, and the matching network comprises a first inductor, a second inductor and a matching capacitor; the open-circuit end and the short-circuit end are grounded; one end of the first inductor is connected with the open-circuit section, and the other end is connected with one end of the matching capacitor and one end of the second inductor; the other end of the second inductor is connected with a feeder line core wire of the feeder line; the other end of the matching capacitor is respectively connected with the short-circuit section antenna body and the feeder line sheath conductor of the feeder line; and the matching network is used for controlling antenna parameters of the broadband antenna to meet expected values. The debugging method is applied to the broadband antenna. According to the invention, the structure and debugging process of the broadband antenna can be simplified, the debugging precision of the broadband antenna is improved, and the technical problem of low debugging efficiency of the broadband antenna at present is solved.

Description

Technical Field

[0001] The present invention relates to the field of communication technology, and in particular to a broadband antenna and a debugging method thereof. Background Art

[0002] A broadband antenna is an antenna designed to operate effectively over a wide frequency range. Broadband antennas are able to provide relatively stable gain and radiation patterns over a wider frequency band than traditional narrowband antennas, making them ideal for applications that require coverage of multiple frequency bands or frequency agility, such as in modern wireless communication systems, radar systems, and broadcast equipment. The design of broadband antennas often involves complex electromagnetic structures to ensure performance over a wide frequency band, which may include the use of specific radiating elements, matching networks, and tuning mechanisms.

[0003] In order to ensure that the antenna can achieve the best performance within its designed operating frequency band, it is necessary to debug the broadband antenna. The purpose of debugging is to optimize the impedance matching of the antenna to reduce signal reflection and loss and improve communication quality.

[0004] However, the current traditional broadband antennas have relatively complex structures, cumbersome debugging processes and limited accuracy, resulting in low debugging efficiency. Summary of the invention

[0005] In view of the above technical problems and defects, the purpose of the present invention is to provide a broadband antenna and a debugging method thereof, which can simplify the broadband antenna structure and debugging process, improve the debugging accuracy of the broadband antenna, and solve the current technical problem of low debugging efficiency of broadband antennas.

[0006] To achieve the above-mentioned purpose, in a first aspect, the present invention provides a broadband antenna, comprising an open-circuit section, a short-circuit section and a matching network, wherein the matching network is connected between the open-circuit section and the short-circuit section, the short-circuit section comprises a short-circuit section antenna body and a feeder, and the matching network comprises a first inductor, a second inductor and a matching capacitor; one end of the open-circuit section away from the matching network is an open-circuit end, and one end of the short-circuit section away from the matching network is a short-circuit end, and both the open-circuit end and the short-circuit end are grounded; one end of the first inductor is connected to the open-circuit section, and the other end is respectively connected to one end of the matching capacitor and one end of the second inductor; the other end of the second inductor is connected to the feeder core wire of the feeder; the other end of the matching capacitor is respectively connected to the short-circuit section antenna body and the feeder outer skin conductor of the feeder; the matching network is used to control the size of the first inductor, the second inductor and the matching capacitor so that the antenna parameters of the broadband antenna meet the expected values.

[0007] The matching network in the present invention is composed of a first inductor, a second inductor and a matching capacitor, which work together to adjust the impedance of the antenna to ensure efficient energy transmission and reception of the broadband antenna throughout the entire operating frequency band. The setting of the open circuit section and the short circuit section, and the way they are connected to the matching network, provide a stable reference point for the antenna and allow the electrical performance of the antenna to be stabilized by grounding. The parameters of the matching network include the size of the inductor and the capacitor, which can be accurately adjusted by a vector network analyzer to achieve control of the antenna parameters to meet the design expectations. This design simplifies the structure and debugging process of the broadband antenna, improves the debugging accuracy of the broadband antenna, improves the performance and efficiency of the antenna, and can also increase its applicability so that it can meet the needs of different communication systems. In this way, the radiation pattern and frequency response of the broadband antenna can be significantly improved, and its bandwidth and frequency characteristics can be optimized, so as to achieve a wider range of applications in modern wireless communication systems.

[0008] In combination with some embodiments of the first aspect, in some embodiments, the antenna parameters include a standing wave ratio and an antenna input impedance; the standing wave ratio is determined based on the impedance of the matching network input end and the known feeder impedance of the feeder, and the impedance of the matching network input end is the impedance between the open circuit section and the short circuit section; the antenna input impedance is determined based on the matching network parameters and the impedance of the matching network input end, and the matching network parameters include the inductance values ​​of the first inductor and the second inductor, and the capacitance value of the matching capacitor.

[0009] The technical solution of the above embodiment provides a method for accurately controlling the performance of a broadband antenna. By defining antenna parameters such as standing wave ratio and antenna input impedance, the standing wave ratio can be determined according to the impedance of the matching network input end and the known impedance of the feeder, and the antenna input impedance can be determined according to the matching network parameters. This method makes antenna debugging more precise and accurate, ensuring that the antenna can achieve the designed performance indicators within the entire working frequency band.

[0010] In combination with some embodiments of the first aspect, in some embodiments, the broadband antenna also includes an open-end capacitor, the open end is grounded through the open-end capacitor, and the open-end capacitor is used to adjust the resonance point of the broadband antenna to be within the geometric center frequency range of the antenna frequency band.

[0011] The technical solution of the above embodiment is adopted to provide additional flexibility for adjusting the resonance point of the broadband antenna by introducing the open-ended capacitor. The adjustment of the open-ended capacitor enables the resonance point of the antenna to be accurately positioned within the geometric center frequency range of the operating frequency band, thereby optimizing the bandwidth and frequency response of the antenna and improving its applicability and efficiency in modern communication systems.

[0012] In combination with some embodiments of the first aspect, in some embodiments, a hollow cavity is formed in the short-circuit section antenna body, and the feeder is arranged in the hollow cavity.

[0013] By adopting the technical solution of the above embodiment, a hollow cavity is designed in the short-circuit section antenna body, and the feeder is placed therein. This design may bring about structural optimization, such as reducing the weight and volume of the antenna, while maintaining or enhancing its electrical performance, which helps to improve the radiation efficiency and signal transmission quality of the antenna.

[0014] In a second aspect, the present invention also provides a broadband antenna debugging method, which is applied to the broadband antenna provided in the first aspect, and the method includes: connecting a vector network analyzer between an open circuit section and a short circuit section of the broadband antenna, the vector network analyzer being provided with a matching network test circuit, and the matching network test circuit corresponding to the matching network of the broadband antenna; adjusting the test network parameters of the matching network test circuit by the vector network analyzer to adjust the antenna test parameters of the broadband antenna, the test network parameters including a first inductance value, a second inductance value and a matching capacitance value; when the antenna test parameters meet the expected values, determining the current test network parameters as target network parameters; making the matching network according to the target network parameters; after connecting the matching network between the open circuit section and the short circuit section, testing the antenna parameters of the broadband antenna by the vector network analyzer; when the antenna parameters meet the expectations, determining that the broadband antenna is debugged successfully.

[0015] The method of the present invention can accurately and efficiently debug the broadband antenna so that the performance of the broadband antenna meets the expected standard. The method optimizes the matching network parameters of the broadband antenna, including the first inductor, the second inductor and the matching capacitor, through the precise measurement and adjustment of the vector network analyzer. This process involves connecting the vector network analyzer to the open circuit section and the short circuit section of the broadband antenna, and testing the antenna using the built-in matching network test circuit. The test network parameters can be adjusted according to the antenna test parameters, such as the standing wave ratio and the input impedance, until the expected values ​​are reached. When the antenna test parameters meet the preset expected values, the current test network parameters are determined as the target network parameters, and the actual matching network is made accordingly. Finally, the made matching network is connected between the open circuit section and the short circuit section of the antenna, and the vector network analyzer is used again for testing to verify whether the antenna parameters meet the expectations. If the antenna parameters meet the expectations, the broadband antenna is determined to be qualified for debugging and is ready for actual deployment. This method not only improves the efficiency and accuracy of antenna debugging, but also ensures the performance stability and reliability of the antenna in the entire working frequency band, meeting the requirements of modern wireless communication systems for high-performance antennas.

[0016] In combination with some embodiments of the second aspect, in some embodiments, before the step of adjusting the test network parameters of the matching network test circuit through the vector network analyzer to adjust the antenna test parameters of the broadband antenna, it also includes: when the open end of the broadband antenna is grounded through the open end capacitor, adjusting the size of the open end capacitor so that the resonance point of the broadband antenna is adjusted to within the geometric center frequency range of the antenna frequency band.

[0017] By adopting the technical solution of the above embodiment, before adjusting the test network parameters, a step of adjusting the open-circuit end capacitance is added to optimize the resonance point of the antenna. This pre-adjustment step enhances the flexibility of the debugging method, allowing technicians to roughly adjust the basic frequency response of the antenna before making detailed parameter adjustments, thereby approaching the ideal working state more quickly.

[0018] In combination with some embodiments of the second aspect, in some embodiments, the antenna test parameters include standing wave ratio and antenna input impedance; the step of adjusting the test network parameters of the matching network test circuit through a vector network analyzer to adjust the antenna test parameters of the broadband antenna includes: determining the impedance between the open circuit section and the short circuit section as the matching network input impedance; in the process of adjusting the test network parameters through the vector network analyzer, determining the standing wave ratio according to the matching network input impedance and the known feeder impedance of the feeder, and determining the antenna input impedance according to the test network parameters and the matching network input impedance.

[0019] The technical solution of the above embodiment is used to explain in detail how to adjust the antenna test parameters of the broadband antenna by adjusting the parameters of the matching network test circuit through a vector network analyzer, including accurately measuring and calculating the standing wave ratio and antenna input impedance. This process ensures that the antenna parameters are accurately adjusted to meet the performance requirements of a specific communication system.

[0020] In conjunction with some embodiments of the second aspect, in some embodiments, the step of determining the standing wave ratio according to the impedance of the input end of the matching network and the known feeder impedance of the feeder includes: The standing wave ratio is calculated according to a standing wave ratio formula, which includes: Where S is the standing wave ratio, Γ is the reflection coefficient, |Γ| is the absolute value of the reflection coefficient, Z0 represents the known feeder impedance, and Z in Represents the input impedance of the matching network.

[0021] The technical solution of the above embodiment is adopted to provide a specific standing wave ratio calculation formula, which further refines how to determine the standing wave ratio according to the impedance of the matching network input end and the feeder impedance. The application of this formula improves the accuracy of standing wave ratio calculation, which helps technicians to more accurately evaluate and optimize the impedance matching of the antenna.

[0022] In conjunction with some embodiments of the second aspect, in some embodiments, the step of determining the antenna input impedance according to the test network parameters and the input impedance of the matching network includes: The antenna input impedance is determined according to the antenna network impedance formula, which includes: Among them, Z in Represents the input impedance of the matching network, Z an represents the input impedance of the antenna, L1 is the first inductance value, L2 is the second inductance value, C1 is the matching capacitance value, and f is the antenna operating frequency.

[0023] The technical solution of the above embodiment provides a method for determining the antenna input impedance based on the matching network parameters and the matching network input impedance. Through the antenna network impedance formula, technicians can more accurately predict and adjust the performance of the antenna to meet the needs of wideband operation.

[0024] In combination with some embodiments of the second aspect, in some embodiments, the step of connecting the vector network analyzer between the open circuit section and the short circuit section of the broadband antenna includes: connecting the core wire of the test line of the vector network analyzer to the open circuit section, and connecting the outer conductor of the test line to the short circuit section.

[0025] The technical solution of the above embodiment is used to explain in detail how to connect the vector network analyzer to the open and short sections of the broadband antenna, ensuring the correctness and reliability of the test connection. This precise connection method is the basis for effective antenna parameter testing and debugging, and is crucial for obtaining accurate test results and optimizing antenna performance.

[0026] One or more technical solutions provided by the present invention have at least the following technical effects or advantages: 1. The present invention uses a well-designed matching network, including a first inductor, a second inductor and a matching capacitor, to accurately control the impedance of the broadband antenna and ensure the best matching with the feeder system within a wide frequency band. This not only improves the signal transmission efficiency, but also reduces reflection and loss, thereby optimizing the radiation pattern and frequency response of the antenna, and meeting the needs of modern wireless communication systems for high-performance antennas.

[0027] 2. The broadband antenna debugging method proposed in the present invention uses a vector network analyzer to automate the debugging process. By connecting the vector network analyzer to the open and short sections of the antenna, the matching network parameters are automatically adjusted until the antenna performance indicators meet expectations. This method significantly improves debugging efficiency, reduces the possibility of human error, and shortens the preparation time before antenna deployment.

[0028] 3. The open circuit section of the present invention is grounded through the open circuit end capacitor, which provides additional flexibility for adjusting the antenna resonance point and ensures the uniform radiation pattern and stable performance of the antenna in the entire operating frequency band. The short circuit section antenna body is designed as a hollow cavity, in which the feeder is set. This new structural design helps to reduce the weight and size of the antenna while maintaining or improving the electrical performance. These design innovations improve the applicability and reliability of the antenna, making it more suitable for the application of modern communication systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings herein are incorporated into and constitute a part of the specification, showing embodiments consistent with the present invention, and together with the specification, are used to explain the principles of the present invention. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 is a schematic structural diagram of a broadband antenna according to an embodiment of the present invention; Figure 2 is a schematic diagram of a partial structure of a broadband antenna in an embodiment of the present invention; Figure 3 is a schematic structural diagram of another broadband antenna according to an embodiment of the present invention; Figure 4 It is a flow chart of a broadband antenna debugging method according to an embodiment of the present invention; Figure 5 It is a flow chart of another broadband antenna debugging method in an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The terms used in the following embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to be limiting of the present invention. As used in the specification of the present invention, the singular expressions "a", "a", "above", "the" and "this" are intended to also include plural expressions, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used in the present invention refers to any or all possible combinations comprising one or more of the listed items.

[0031] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood as implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, unless otherwise specified, the meaning of "plurality" is two or more.

[0032] It should also be noted that, unless otherwise clearly specified and limited, in the embodiments of the present invention, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" 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 components; it can be a wired communication connection or a wireless communication connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. The embodiments of the present invention are described in detail below.

[0033] An embodiment of the present invention provides a broadband antenna, such as Figure 1 and 2 As shown, it includes an open circuit section 1, a short circuit section 2 and a matching network 3, the matching network 3 is connected between the open circuit section 1 and the short circuit section 2, the short circuit section 2 includes a short circuit section antenna body 21 and a feeder 22, and the matching network 3 includes a first inductor L1, a second inductor L2 and a matching capacitor C1; the end of the open circuit section 1 away from the matching network 3 is an open circuit end, the end of the short circuit section 2 away from the matching network 3 is a short circuit end, and the open circuit end and the short circuit end are both grounded; one end of the first inductor L1 is connected to the open circuit section 1, and the other end is respectively connected to one end of the matching capacitor C1 and one end of the second inductor L2; the other end of the second inductor L2 is connected to the feeder core wire 22a of the feeder 22; the other end of the matching capacitor C1 is respectively connected to the short circuit section antenna body 21 and the feeder outer skin conductor 22b of the feeder 22; the matching network 3 is used to control the size of the first inductor L1, the second inductor L2 and the matching capacitor C1 so that the antenna parameters of the broadband antenna meet the expected values.

[0034] In the broadband antenna of this embodiment, the matching network 3 is composed of a first inductor L1, a second inductor L2 and a matching capacitor C1, and these components work together to achieve impedance matching of the antenna in the entire working frequency band. The ends of the open section 1 and the short section 2 are both grounded, providing a stable reference point, ensuring the reliability and repeatability of the antenna structure. One end of the first inductor L1 and the second inductor L2 are connected to the antenna body of the open section 1 and the short section 2 respectively, and their other ends are connected to the matching capacitor C1. Such a layout allows the impedance characteristics of the antenna to be accurately controlled by adjusting the size of the inductor and the capacitor. Through the above-mentioned antenna structure design, the physical structure of the broadband antenna is simplified.

[0035] Furthermore, by precisely controlling the inductance and capacitance values ​​in the matching network 3, the antenna parameters of the antenna can be finely adjusted to ensure that they meet the design specifications. This capability is essential for optimizing antenna performance, improving signal transmission efficiency, and reducing reflection losses. This embodiment greatly reduces debugging time and workload through automated matching network 3 adjustment. This not only improves production efficiency, but also reduces the possibility of human error, thereby improving the overall performance and reliability of the antenna system.

[0036] The broadband antenna of this embodiment not only simplifies the antenna structure, but also significantly improves the debugging accuracy and efficiency through the innovative matching network design. These technical effects work together to enable the broadband antenna to better meet the needs of modern communication systems for high-performance antennas, bringing significant technological progress to the field of wireless communications.

[0037] In this embodiment, the open section 1 provides a high impedance adjustment point, and the short section 2 provides a low impedance reference point. By adjusting the impedance between the open section 1 and the short section 2 through the matching network 3, the antenna can achieve good impedance matching with the feeder 22 system in the entire working frequency band, thereby optimizing the performance of the antenna.

[0038] In some embodiments, the antenna parameters include standing wave ratio and antenna input impedance; the standing wave ratio is determined based on the impedance of the matching network input end and the known feeder impedance of the feeder 22, and the impedance of the matching network input end is the impedance between the open circuit section 1 and the short circuit section 2; the antenna input impedance is determined based on the matching network parameters and the impedance of the matching network input end, and the matching network parameters include the inductance values ​​of the first inductor L1 and the second inductor L2, and the capacitance value of the matching capacitor C1.

[0039] In the design and debugging process of broadband antennas, key antenna parameters include standing wave ratio (VSWR) and antenna input impedance. Standing wave ratio is an important indicator to measure the matching degree between the antenna body and the feeder 22, which reflects the reflection of the signal during the transmission process.

[0040] Combination Figure 3 The standing wave ratio is determined based on the impedance of the matching network input and the known impedance of the feeder 22. The impedance of the matching network input refers to the impedance between the open circuit section 1 and the short circuit section 2. The impedance of the matching network input directly affects the calculation of the standing wave ratio and the matching effect of the antenna. By accurately measuring and calculating the impedance of the matching network input, the matching condition of the antenna at a specific frequency can be evaluated, and then the efficiency of signal transmission can be determined.

[0041] Specifically, the standing wave ratio can be calculated by the standing wave ratio formula, which includes: Wherein, S is the standing wave ratio; Γ is the reflection coefficient; |Γ| is the absolute value of the reflection coefficient; Z0 represents the known feeder impedance of the feeder 22, that is, the characteristic impedance of the feeder 22, which is a known quantity; Z in Represents the impedance of the matching network input.

[0042] By measuring and calculating these parameters, the impedance matching of the antenna system can be accurately evaluated, thereby optimizing the antenna design, ensuring efficient signal transmission, reducing reflection losses, and improving the overall performance of the communication system.

[0043] In this embodiment, the standing wave ratio S needs to be adjusted to be less than or equal to 2. Because such a standing wave ratio indicates that the impedance matching between the antenna and its feeder 22 is very high. The standing wave ratio is a parameter that measures the voltage standing wave pattern on the feeder 22, and it is given by the ratio of the maximum voltage to the minimum voltage on the feeder 22. When the standing wave ratio is 1, it indicates perfect matching, which means that all signals incident on the antenna are effectively radiated, and no energy is reflected back to the feedback line 22. However, in practical applications, perfect matching is difficult to achieve, so the standing wave ratio standard accepted in this embodiment is less than or equal to 2, which means that the mismatch between the antenna and the feeder 22 is small enough and the reflection loss is within an acceptable range.

[0044] On the other hand, when the standing wave ratio is less than or equal to 2, it can ensure that the antenna works effectively in a wide frequency band, provides a consistent radiation pattern and high signal transmission efficiency, and thus meets the requirements of modern wireless communication systems for high-performance antennas. By finely adjusting the inductor and capacitor elements in the matching network 3, and the possible open-end capacitor C2, the input impedance of the antenna can be optimized to be close to the characteristic impedance of the feed line 22, achieving good impedance matching, and thus achieving an ideal standing wave ratio.

[0045] Combined with the above standing wave ratio formula, when the standing wave ratio S is adjusted to be less than or equal to 2, the value of the impedance Zin at the input end of the matching network can be calculated.

[0046] The antenna input impedance is the impedance value presented by the antenna to the feeder 22 at the operating frequency, which determines the efficiency of the feeder 22 in transmitting energy to the antenna. The determination of the antenna input impedance depends on the matching network parameters and the impedance of the matching network input end. The matching network parameters include the inductance values ​​of the first inductor L1 and the second inductor L2 and the capacitance value of the matching capacitor C1. These parameters jointly determine the overall impedance characteristics of the matching network 3, which in turn affects the value of the antenna input impedance. By adjusting the values ​​of these components, the input impedance of the antenna can be optimized to be close to the characteristic impedance of the feeder 22, thereby reducing signal reflection and improving energy transmission efficiency.

[0047] Specifically, refer to Figure 3 , the antenna input impedance can be determined based on the antenna network impedance formula, which includes: Among them, Z in Represents the impedance of the matching network input, Z an represents the antenna input impedance, L1 represents the inductance value of the first inductor, L2 represents the inductance value of the second inductor, C1 represents the capacitance value of the matching capacitor, and f is the antenna operating frequency.

[0048] The above antenna network impedance formula expresses the mathematical relationship between the matching network input impedance, antenna input impedance, first inductor, second inductor and matching capacitor. By adjusting the values ​​of L1, L2 and C1, the impedance characteristics of the matching network 3 can be changed, so that Z in It is closer to the characteristic impedance of the feed line 22 (which may be 50Ω or 75Ω), thus achieving better impedance matching.

[0049] Combined with the above standing wave ratio formula, when the standing wave ratio S is less than or equal to 2, the value of the matching network input impedance Zin can be calculated. Combined with the above antenna network impedance formula, the antenna input impedance Zan can also be reversely calculated.

[0050] This embodiment adopts such a matching network 3 design to allow the antenna to work efficiently in a wide frequency band, reduce signal reflection, and improve the quality and efficiency of signal transmission. By accurately calculating and adjusting the matching network parameters, it can be ensured that the antenna can achieve the desired performance indicators in the entire working frequency band, meeting the requirements of modern wireless communication systems for wide bandwidth operation capabilities.

[0051] In this embodiment, by carefully adjusting the inductance and capacitance of the matching network 3 and accurately measuring the impedance between the open section 1 and the short section 2, the key parameters of the broadband antenna can be effectively controlled and optimized to ensure that the antenna can achieve good performance in the entire working frequency band. This method not only improves the working efficiency of the antenna, but also enhances the overall reliability and stability of the communication system.

[0052] In some embodiments, the broadband antenna further includes an open-end capacitor C2, the open end is grounded through the open-end capacitor C2, and the open-end capacitor C2 is used to adjust the resonance point of the broadband antenna to be within the geometric center frequency range of the antenna frequency band.

[0053] In the design of the broadband antenna of this embodiment, the introduction of the open-end capacitor C2 is to achieve more refined impedance matching and frequency adjustment. As part of the matching network 3, the open-end capacitor C2 is connected to the open end, and its function is to adjust the resonant frequency of the antenna to ensure that the resonance point falls within the geometric center frequency range of the antenna operating frequency band. Because when the resonant frequency is at the center of the frequency band, the radiation pattern and gain of the antenna are more uniform and stable within the frequency band, thereby providing consistent signal coverage and transmission efficiency. This centralized adjustment helps to optimize the impedance matching of the antenna, reduce reflections and losses caused by frequency changes, and ensure that the signal can be efficiently transmitted at different frequencies. In addition, this also helps to balance the gain of the antenna throughout the frequency band and avoid possible performance degradation at the edge of the frequency band, which is of great significance for improving communication quality and reliability and meeting the strict requirements of modern broadband communication systems for antenna performance.

[0054] In this embodiment, by changing the value of the open-ended capacitor C2, the electrical length of the antenna can be fine-tuned, thereby affecting its resonant characteristics. This adjustment can improve the radiation pattern and impedance matching of the antenna in the full frequency band, and improve the transmission efficiency and reception quality of the signal. The grounding method of the open-ended capacitor C2 provides a stable reference point for the antenna, helps to reduce the parasitic effects on the structure, and ensures the accuracy and repeatability of the debugging.

[0055] At the same time, the short-circuit section 2 can be directly connected to the ground terminal GND, providing a low-impedance reference point for the other end of the antenna. The direct grounding of the short-circuit section 2 helps to define the physical and electrical boundary conditions of the antenna, ensuring effective power transmission from the feed line 22 to the antenna body. The grounding of the short-circuit section 2 also helps to reduce the parasitic radiation and return loss of the antenna, thereby optimizing the radiation efficiency and bandwidth performance of the antenna. Through such a design, the broadband antenna can achieve a more uniform radiation pattern throughout the entire operating frequency band, meeting the requirements of modern wireless communication systems for broadband and wide-bandwidth operation.

[0056] In general, the combination of grounding the open-circuit capacitor C2 and grounding the short-circuit section 2 provides an efficient, flexible and reliable impedance matching and frequency adjustment mechanism for the broadband antenna, which significantly improves the overall performance of the antenna system.

[0057] In some embodiments, Figure 2 As shown, a hollow cavity 21 a is formed in the short-circuit section antenna body 21 , and the feeder line 22 is arranged in the hollow cavity 21 a .

[0058] This embodiment adopts the above design to provide a new antenna structure layout. This design utilizes the resonant characteristics of the cavity and can effectively adjust and optimize the operating frequency and radiation mode of the antenna. As a closed space, the hollow cavity 21a can support multiple modes of electromagnetic wave resonance. By accurately designing the size and shape of the cavity, the resonant frequency can be controlled to match the operating frequency band of the antenna. In addition, the feed line 22 is located in the hollow cavity 21a, which can interact with the resonant mode of the cavity to further adjust the electrical parameters of the antenna, such as input impedance and radiation efficiency.

[0059] This structure also helps to reduce the physical size and weight of the antenna while maintaining or even improving its electrical performance. By embedding the feeder 22 in the hollow cavity 21a, the impact of the external environment on the antenna performance can be reduced, and the weather resistance and stability of the antenna can be improved. In addition, this design may also bring manufacturing convenience and simplify the assembly and maintenance process of the antenna.

[0060] The design of the hollow cavity in the short-circuit section antenna body 21 and the feed line 22 in this embodiment provides an efficient structural solution for the broadband antenna, which helps to achieve a wider operating frequency band, lower loss and better radiation characteristics, and meets the requirements of modern wireless communications for high-performance antennas.

[0061] The broadband antenna of this embodiment achieves efficient energy transmission and excellent radiation characteristics in a wide bandwidth frequency band through a new structural layout. The broadband antenna includes an open section 1, a short section 2, and a matching network 3 connecting the two, wherein the open section 1 is grounded through an open-end capacitor C2, and the short section 2 is directly grounded. Such a design provides a stable reference point for the antenna, and allows the resonant frequency of the antenna to be optimized by adjusting the open-end capacitor C2 to ensure that it is within the geometric center frequency range of the working frequency band, thereby achieving a more uniform radiation pattern and more stable performance in the entire frequency band.

[0062] The matching network 3 is a key component of the broadband antenna. It consists of the first inductor L1, the second inductor L2 and the matching capacitor C1. The precise selection and connection of these components are crucial to achieve the best impedance matching between the antenna and the feeder 22 system. The impedance of the matching network input end is calculated through an antenna network impedance formula and a standing wave ratio calculation formula, which takes into account the operating frequency, inductance and capacitance values, and the original input impedance of the antenna. This calculation process allows the designer to optimize the matching network parameters to achieve the best match between the antenna input impedance and the characteristic impedance of the feeder 22, reduce signal reflections, and improve energy transmission efficiency.

[0063] In addition, the hollow cavity formed in the short-circuit section antenna body 21 and the arrangement of the feed line 22 in the cavity provide an efficient structural layout for the antenna. This design uses the resonant characteristics of the cavity to further adjust the operating frequency and radiation pattern of the antenna. At the same time, the built-in feed line 22 helps to reduce the impact of the external environment and improve the weather resistance and stability of the antenna. In general, this broadband antenna technology solution provides a high-performance, wide-bandwidth, high-stability and high-reliability antenna solution for broadband communication systems through its unique matching network 3 design, the structural layout of the open circuit section 1 and the short circuit section 2, and the innovative application of the hollow cavity, meeting the requirements of modern wireless communications for the broadband operation capability of antennas.

[0064] The embodiment of the present invention also provides a broadband antenna debugging method, which is applied to the broadband antenna provided in the above embodiment, such as Figure 4 As shown, the method comprises the following steps: Step 201: Connect a vector network analyzer between an open circuit section and a short circuit section of a broadband antenna.

[0065] Wherein, the vector network analyzer is provided with a matching network test circuit, and the matching network test circuit corresponds to the matching network of the broadband antenna.

[0066] A vector network analyzer is a high-precision test device that can measure and analyze the network parameters of RF circuits, such as impedance and reflection coefficient. A matching network test circuit is set inside the vector network analyzer. This test circuit simulates the actual matching network of a broadband antenna to ensure that the test circuit corresponds to the matching network of the broadband antenna, so that the performance parameters of the antenna can be accurately measured and adjusted. This step provides the necessary test platform and data support for subsequent debugging work.

[0067] In some embodiments, this step may include: connecting a core wire of a test line of a vector network analyzer to an open circuit section, and connecting an outer conductor of the test line to a short circuit section.

[0068] Specifically, first connect the core wire of the test line of the vector network analyzer to the open section of the broadband antenna. This step is to connect the signal input end of the vector network analyzer to the open end of the antenna, so as to obtain the original impedance characteristics of the antenna under no-load condition. Subsequently, the outer conductor of the test line needs to be connected to the short-circuit section to form the reference ground of the broadband antenna, ensuring the stability and safety of the signal during the test. This connection method not only allows the vector network analyzer to simulate the matching network of the antenna, but also accurately measure and adjust the performance parameters of the antenna, such as standing wave ratio and input impedance, so as to optimize the impedance matching between the antenna and the feeder.

[0069] Through such a connection, the vector network analyzer can provide detailed data on the performance of the broadband antenna, providing an important basis for the subsequent matching network design and debugging. This step is the basis for antenna debugging and performance verification, and is crucial to ensure that the broadband antenna can achieve the expected working performance throughout the entire operating frequency band.

[0070] Step 202: adjusting the test network parameters of the matching network test circuit by the vector network analyzer to adjust the antenna test parameters of the broadband antenna.

[0071] The test network parameters include a first inductance value, a second inductance value and a matching capacitance value.

[0072] In this step, the parameters of the matching network test circuit are adjusted by a vector network analyzer to adjust the standing wave ratio of the broadband antenna. The standing wave ratio is a key indicator to measure the matching degree between the antenna and the feeder system, which directly affects the signal transmission efficiency and the radiation performance of the antenna.

[0073] The vector network analyzer sends a series of signals of known frequencies to the matching network test circuit, measures the reflected signals, and then uses computer equipment to calculate the impedance characteristics of the network. Based on the measurement results, the antenna test parameters under the current matching network parameters can be understood, such as performance parameters such as standing wave ratio and input impedance.

[0074] If these antenna test parameters deviate from the design target values, the inductor and capacitor values ​​in the test circuit will be adjusted through the interface of the vector network analyzer. During the adjustment process, multiple iterations may be required, and the antenna performance must be re-measured and evaluated after each adjustment until the standing wave ratio and input impedance reach the expected target.

[0075] This process not only improves the working efficiency of the antenna, but also ensures the quality and reliability of signal transmission, meeting the needs of broadband communication systems for high-performance antennas. Through this automated and precise adjustment method, the vector network analyzer greatly simplifies the debugging of broadband antennas and improves debugging efficiency and accuracy.

[0076] Step 203: When the antenna test parameter meets the expected value, the current test network parameter is determined as the target network parameter.

[0077] Specifically, when a series of fine adjustments are made to the matching network of a broadband antenna using a vector network analyzer, each set of test network parameters is designed to optimize the key performance indicators of the antenna, such as standing wave ratio and input impedance, to meet the design specifications or operating requirements.

[0078] During this process, the vector network analyzer provides real-time data feedback to monitor changes in antenna performance. When the measurement results show that the antenna test parameters, including standing wave ratio and input impedance, meet or are close to the preset expected values, this means that the current matching network configuration has successfully achieved the ideal impedance matching between the antenna and the feeder system. At this point, the test network parameters recorded by the vector network analyzer, including the first inductance value, the second inductance value, and the matching capacitor value, will be determined as the optimal solution, that is, the target network parameters. These parameters are then used to guide the production or adjustment of the actual matching network to ensure that the broadband antenna can exhibit proven performance in actual deployment and meet the requirements of specific communication systems.

[0079] This step of determining the target network parameters is a decisive link in the antenna debugging process. It is directly related to the final performance and reliability of the antenna and has a direct impact on the communication quality.

[0080] Step 204: Create a matching network according to the target network parameters.

[0081] Specifically, the above-mentioned target network parameters are first obtained from a vector network analyzer. These parameters include the required first inductance value, second inductance value and matching capacitance value, which are optimal values ​​determined after careful adjustment and testing to achieve optimal impedance matching between the antenna and the feeder system.

[0082] The appropriate inductor and capacitor components can then be selected based on these parameters. The precise measurement of these components must meet the requirements of the target parameters to ensure the performance of the matching network.

[0083] These components are then precisely connected according to the design requirements and assembled into a matching network. During the production process, it may be necessary to use precision instruments for intermediate testing to ensure that the impedance value of each component meets the predetermined target.

[0084] After assembly, the matching network usually needs to undergo final testing to verify whether it has truly achieved the expected impedance matching effect. Only when the matching network shows performance consistent with the target parameters in actual testing can it be officially installed in the broadband antenna system, completing the entire matching network production process.

[0085] This process requires not only precise process and manufacturing technology, but also a deep understanding of RF circuit design to ensure that the broadband antenna can achieve efficient energy transmission and reception across the entire operating frequency band.

[0086] Step 205 , after connecting the matching network between the open circuit section and the short circuit section, the antenna parameters of the broadband antenna are tested by a vector network analyzer.

[0087] Among them, the matching network components are accurately installed between the open-circuit section and the short-circuit section of the broadband antenna, marking the transition of the matching network from theoretical design to physical implementation, where the precise placement of the matching network is crucial to the overall performance of the antenna.

[0088] After the matching network is installed, a vector network analyzer can be used to test a wideband antenna for a range of parameters, which may include standing wave ratio, input impedance, gain, and radiation pattern. The vector network analyzer sends a signal through the matching network and measures the signal reflected from the antenna to evaluate the impedance matching and efficiency of the antenna. The test results will provide feedback on the performance of the antenna at different frequencies, ensuring that the wideband antenna meets the design specifications throughout the operating frequency band.

[0089] Step 206: When the antenna parameters meet expectations, it is determined that the broadband antenna is debugged successfully.

[0090] Specifically, after completing the antenna parameter test with a vector network analyzer, the obtained data can be compared with the expected performance standards. If the antenna parameters fully meet or exceed the expected performance indicators, including appropriate standing wave ratio and accurate input impedance, this indicates that the antenna debugging work has achieved the goal and the broadband antenna is determined to be qualified for debugging. This recognition is an important milestone in the antenna debugging process, which means that the antenna is ready for practical application and can meet the needs of modern wireless communication systems for high-performance antennas. After confirming that the antenna debugging is qualified, the broadband antenna can be finally integrated and deployed to provide the required signal transmission and reception capabilities for the communication system.

[0091] The method of this embodiment can ensure high efficiency and stable operation of the broadband antenna in the entire working frequency band. The method starts with accurately connecting the vector network analyzer and placing it between the open circuit section and the short circuit section of the broadband antenna. This step is the starting point of the debugging process. The vector network analyzer is equipped with a matching network test circuit, which corresponds to the matching network design of the broadband antenna, ensuring the accuracy and reliability of the test.

[0092] Subsequently, the parameters of the matching network test circuit are adjusted using a vector network analyzer. These parameters include the values ​​of the first inductor, the second inductor, and the matching capacitor, in order to optimize the test parameters of the broadband antenna, such as the standing wave ratio and input impedance, to meet the design requirements. This adjustment process involves careful measurement and repeated optimization of the antenna performance parameters until the antenna test parameters meet the preset expected values. At this point, the current test network parameters are determined as the optimal matching network parameters, providing precise guidance for the production of the actual matching network.

[0093] Next, based on the determined optimal matching network parameters, a matching network is physically produced to ensure that it can accurately match the matching network of the broadband antenna. After the matching network is completed, it is connected between the open circuit section and the short circuit section of the broadband antenna, and the parameters of the broadband antenna are tested again using a vector network analyzer to verify the actual effect of the matching network.

[0094] Finally, when the antenna parameters obtained by the vector network analyzer test meet the expected performance standards, the broadband antenna is determined to be debugged. This means that the antenna has been accurately debugged and is ready for practical application, meeting the needs of modern wireless communication systems for high-performance antennas. The entire debugging method embodies the strict control and optimization of the performance parameters of the broadband antenna, ensuring the reliability and communication quality of the antenna system.

[0095] The embodiment of the present invention also provides a broadband antenna debugging method, such as Figure 5 As shown, the following steps are included: Step 301: Connect a vector network analyzer between an open circuit section and a short circuit section of a broadband antenna.

[0096] This step refers to step 201 and will not be repeated here.

[0097] Step 302: When the open end of the broadband antenna is grounded via an open end capacitor, the size of the open end capacitor is adjusted to adjust the resonance point of the broadband antenna to within the geometric center frequency range of the antenna frequency band.

[0098] Among them, the open-end capacitor is connected to the open end of the antenna as part of the matching network and plays the role of adjusting the electrical length of the antenna. By changing the size of the open-end capacitor, the resonance point of the antenna can be effectively adjusted, because the change in capacitance directly affects the total impedance of the antenna and its resonance characteristics. When the open-end capacitance is reduced, the electrical length of the antenna increases relatively, resulting in a decrease in the resonant frequency; conversely, increasing the capacitance value shortens the electrical length and increases the resonant frequency.

[0099] The resonant frequency of the antenna under different capacitance values ​​can be accurately measured using a vector network analyzer, and after repeated adjustments and tests, the resonant point of the antenna is precisely tuned to the target frequency range. This tuning process is particularly important for broadband antennas because it ensures that the antenna can achieve optimal performance within its designed operating frequency band, including maximum radiation efficiency and minimum signal reflection, thereby meeting the stringent requirements of modern broadband communication systems for antenna performance. By carefully adjusting the open-end capacitance, broadband antennas can provide stable and efficient signal transmission and reception capabilities throughout the operating frequency band.

[0100] Step 303: determine the impedance between the open circuit section and the short circuit section as the impedance of the input end of the matching network.

[0101] A vector network analyzer can be used to measure the impedance between the open and short sections of a broadband antenna, i.e., the impedance at the input of the matching network. By accurately measuring this impedance value, important reference data can be provided for the subsequent design and adjustment of the matching network. The determination of the impedance at the input of the matching network is crucial to achieving the best impedance matching between the antenna and the feeder system, which directly affects the signal transmission efficiency and the radiation performance of the antenna. Through the precise measurement of the vector network analyzer, the accuracy of the impedance at the input of the matching network can be ensured, providing a reliable basis for the subsequent test network parameter adjustment and standing wave ratio optimization.

[0102] Step 304, in the process of adjusting the test network parameters by the vector network analyzer, the standing wave ratio is determined according to the matching network input impedance and the known feeder impedance of the feeder, and the antenna input impedance is determined according to the test network parameters and the matching network input impedance.

[0103] Specifically, antenna test parameters include standing wave ratio and antenna input impedance.

[0104] The standing wave ratio can be calculated according to the standing wave ratio formula, which includes: Where S is the standing wave ratio, Γ is the reflection coefficient, |Γ| is the absolute value of the reflection coefficient, Z0 represents the known feeder impedance, and Z in Represents the impedance of the matching network input.

[0105] By measuring and calculating these parameters, the impedance matching of the antenna system can be accurately evaluated, thereby optimizing the antenna design, ensuring efficient signal transmission, reducing reflection losses, and improving the overall performance of the communication system.

[0106] The antenna input impedance can also be determined based on the antenna network impedance formula, which includes: Among them, Z in Represents the impedance of the matching network input, Z an represents the antenna input impedance, L1 is the first inductance value, L2 is the second inductance value, C is the matching capacitance value, and f is the antenna operating frequency.

[0107] The above antenna network impedance formula expresses the mathematical relationship between the matching network input impedance, antenna input impedance, first inductor, second inductor and matching capacitor. By adjusting the values ​​of L1, L2 and C1, the impedance characteristics of the matching network can be changed, so that Z in It is closer to the characteristic impedance of the feeder (which may be 50Ω or 75Ω), thus achieving better impedance matching.

[0108] Combined with the above standing wave ratio formula, when the standing wave ratio S is less than or equal to 2, the value of the matching network input impedance Zin can be calculated. Combined with the above antenna network impedance formula, the antenna input impedance Zan can also be reversely calculated.

[0109] Step 305: When the standing wave ratio and the antenna input impedance meet the expected values, the current test network parameters are determined as target network parameters.

[0110] When the standing wave ratio and antenna input impedance of the broadband antenna both meet the preset expected values, it indicates that the current matching network configuration has successfully optimized the electrical performance of the antenna and achieved effective impedance matching with the feeder system. In this case, the test network parameters recorded by the vector network analyzer, including the first inductance value, the second inductance value, and the matching capacitor value, will be determined as the optimal matching network parameters, namely the target network parameters. These parameters reflect the precise configuration of the matching network components, which work together to adjust the impedance of the antenna so that it is close to the characteristic impedance of the feeder within the operating frequency band, thereby minimizing signal reflection and maximizing energy transmission efficiency. The determination of the target network parameters is an important decision point in the antenna debugging process. It means that a matching solution that meets the performance requirements has been found, providing exact guidance for the final matching network production and antenna deployment. This step ensures the reliability of the antenna in actual applications and the overall performance of the communication system.

[0111] Step 306: Create a matching network according to the target network parameters.

[0112] This step refers to step 204 and will not be described in detail here.

[0113] Step 307 : After connecting the matching network between the open circuit section and the short circuit section, the antenna parameters of the broadband antenna are tested by a vector network analyzer.

[0114] This step refers to step 205 and will not be repeated here.

[0115] Step 308: When the antenna parameters meet expectations, it is determined that the broadband antenna is debugged successfully.

[0116] During the debugging process of broadband antennas, technicians will use vector network analyzers to accurately measure antenna parameters, including key performance indicators such as standing wave ratio and antenna input impedance. When the antenna parameters fully meet the expected performance standards, it means that the antenna has successfully achieved the best impedance matching with its matching network and feeder system. At this time, it can be determined that the broadband antenna is qualified for actual deployment or further application.

[0117] However, if the measurement results show that the antenna parameters do not meet expectations, it means that the current matching network configuration fails to achieve ideal impedance matching. At this time, technicians need to readjust the value of the open-end capacitor to change the resonant characteristics of the antenna. At the same time, other components in the matching network, such as inductors and capacitors, may also need to be fine-tuned to optimize the overall impedance matching. This adjustment process may require multiple iterations until the antenna parameters fully meet the design requirements, ensuring that the antenna can exhibit the expected performance throughout the entire operating frequency band. This meticulous adjustment work is critical to the performance of broadband antennas, which directly affects the signal transmission efficiency and communication quality.

[0118] In some embodiments, the specific implementation process of the broadband antenna debugging method is as follows: 1) Antenna burial and grounding: 1.1) Bury the broadband antenna underground as required, ensuring that the burial depth is not less than 1.5 meters.

[0119] 1.2) Reserve a manhole location for debugging.

[0120] 1.3) Ensure that the grounding resistance of the open circuit end does not exceed 10 ohms and the grounding resistance of the short circuit end does not exceed 5 ohms.

[0121] 2) Matching box and test equipment installation: 2.1) Install a vacuum variable capacitor, i.e., the open-end capacitor, in the matching box at the open-end.

[0122] 2.2) Connect the open end of the antenna to ground via an open end capacitor.

[0123] 2.3) Connect the vector network analyzer to the middle matching box of the broadband antenna.

[0124] 2.4) Use open clip wires to connect the open and short sections of the antenna to the network analyzer.

[0125] 2.5) Connect the computer to the network analyzer via a GPIB to USB cable or an Ethernet cable.

[0126] 2.6) Calibrate the instrument, including the test lead, before testing.

[0127] 3) Open circuit capacitor debugging: 3.1) Adjust the open-circuit capacitance and observe the resonance point.

[0128] 3.2) Adjust the open-circuit end capacitance value so that the resonance point is close to the geometric center frequency of the operating frequency band.

[0129] 3.3) When the resonance point approaches the center frequency, the software on the computer will emit a prompt sound.

[0130] 3.4) Slowly adjust the capacitance until the reactance passes through zero, then pause debugging.

[0131] 4) Matching network parameter measurement and calculation: 4.1) Switch the debugging software to the matching network measurement and calculation interface.

[0132] 4.2) Collect antenna impedance sample data using single sampling.

[0133] 4.3) The software automatically calculates the matching network parameters and observes the average standing wave ratio.

[0134] 4.4) If the average standing wave ratio is not greater than 2 and the changing curve is gentle, make the matching network circuit according to the software parameters and obtain the circuit design drawing.

[0135] 4.5) If necessary, use continuous sampling and adjust the variable capacitor until the requirements are met.

[0136] 4.6) Test with an L / C meter and replace the variable capacitor with a fixed capacitance capacitor.

[0137] 4.7) If the fixed capacitance capacitors and variable capacitors deviate greatly, recalculate the matching network.

[0138] 5) Matching network installation and testing: 5.1) Install the matching network and open-end capacitors into the matching box according to the circuit design drawing.

[0139] 5.2) Connect the matching box to the antenna body of the broadband antenna.

[0140] 5.3) Connect a vector network analyzer to the feeder port of the matching network.

[0141] 5.4) Use the debugging software to measure the antenna impedance and standing wave ratio and save the data.

[0142] 5.5) The antenna standing wave ratio within the working frequency band is not greater than 2 to be qualified.

[0143] 6) Antenna matching box sealing and final test: 6.1) Seal the broadband antenna matching box and backfill it with soil.

[0144] 6.2) Connect the network analyzer to the antenna feeder port in the equipment room.

[0145] 6.3) Use the debugging software to test the antenna parameters (impedance and standing wave ratio) and save the data.

[0146] 6.4) The antenna is qualified if its standing wave ratio is no more than 2.

[0147] In this embodiment, the vector network analyzer is connected to the computer through the Ethernet port or the GPIO port, the antenna impedance data measured by the vector network analyzer is obtained through the software, and the data is automatically recorded, stored and sent to the matching network calculation program to complete all the work, and continuous real-time sampling calculation can be performed while adjusting the open-end capacitance. The computer sampling time is short and the accuracy is high. The sampling points are increased to 21 points, and the sampling longitude is increased to 6 decimal places, which makes the calculation more accurate, reduces the risk of repeated debugging of the matching network in the later stage, realizes one-click calculation of the matching network, and shortens the time for a single measurement and calculation of the matching network from 1 hour to 1 second.

[0148] As described above, the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. 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 scope of the technical solutions of the embodiments of the present invention.

Claims

1. A broadband antenna, characterized in that: It includes an open circuit section, a short circuit section and a matching network, wherein the matching network is connected between the open circuit section and the short circuit section, the short circuit section includes a short circuit section antenna body and a feeder, and the matching network includes a first inductor, a second inductor and a matching capacitor; One end of the open circuit section away from the matching network is an open circuit end, one end of the short circuit section away from the matching network is a short circuit end, and both the open circuit end and the short circuit end are grounded; One end of the first inductor is connected to the open circuit section, and the other end is respectively connected to one end of the matching capacitor and one end of the second inductor; the other end of the second inductor is connected to the feeder core wire of the feeder; the other end of the matching capacitor is respectively connected to the short circuit section antenna body and the feeder outer skin conductor of the feeder; The matching network is used to make the antenna parameters of the broadband antenna meet the expected values ​​by controlling the sizes of the first inductor, the second inductor and the matching capacitor.

2. The broadband antenna according to claim 1, characterized in that: The antenna parameters include standing wave ratio and antenna input impedance; The standing wave ratio is determined according to the impedance of the input end of the matching network and the known feeder impedance of the feeder, wherein the impedance of the input end of the matching network is the impedance between the open circuit section and the short circuit section; The antenna input impedance is determined according to matching network parameters and the impedance of the matching network input end, wherein the matching network parameters include the inductance values ​​of the first inductor and the second inductor, and the capacitance value of the matching capacitor.

3. The broadband antenna according to claim 1, characterized in that: It also includes an open-circuit end capacitor, the open end is grounded through the open-circuit end capacitor, and the open-circuit end capacitor is used to adjust the resonance point of the broadband antenna to be within the geometric center frequency range of the antenna frequency band.

4. The broadband antenna according to any one of claims 1 to 3, characterized in that: A hollow cavity is formed in the short-circuit section antenna body, and the feed line is arranged in the hollow cavity.

5. A broadband antenna debugging method, characterized in that: Applied to the broadband antenna according to any one of claims 1 to 4, the method comprising: Connecting a vector network analyzer between the open circuit section and the short circuit section of the broadband antenna, wherein the vector network analyzer is provided with a matching network test circuit, and the matching network test circuit corresponds to the matching network of the broadband antenna; Adjusting the test network parameters of the matching network test circuit by the vector network analyzer to adjust the antenna test parameters of the broadband antenna, wherein the test network parameters include a first inductance value, a second inductance value, and a matching capacitance value; When the antenna test parameters meet the expected values, determining the current test network parameters as target network parameters; Producing the matching network according to the target network parameters; After the matching network is connected between the open circuit section and the short circuit section, the antenna parameters of the broadband antenna are tested by the vector network analyzer; When the antenna parameters meet expectations, it is determined that the broadband antenna is debugged successfully.

6. The method according to claim 5, characterized in that Before the step of adjusting the test network parameters of the matching network test circuit through the vector network analyzer to adjust the antenna test parameters of the broadband antenna, it also includes: when the open end of the broadband antenna is grounded through the open end capacitor, adjusting the size of the open end capacitor so that the resonance point of the broadband antenna is adjusted to the geometric center frequency range of the antenna frequency band.

7. The method according to claim 5 or 6, characterized in that: The antenna test parameters include standing wave ratio and antenna input impedance; The step of adjusting the test network parameters of the matching network test circuit by the vector network analyzer to adjust the antenna test parameters of the broadband antenna includes: Determining the impedance between the open circuit section and the short circuit section as the impedance of the input end of the matching network; In the process of adjusting the test network parameters by the vector network analyzer, the standing wave ratio is determined according to the matching network input impedance and the known feeder impedance of the feeder, and the antenna input impedance is determined according to the test network parameters and the matching network input impedance.

8. The method according to claim 7, characterized in that The step of determining the standing wave ratio according to the impedance of the matching network input end and the known feeder impedance of the feeder comprises: The standing wave ratio is calculated according to a standing wave ratio formula, which includes: Wherein, S is the standing wave ratio, Γ is the reflection coefficient, |Γ| is the absolute value of the reflection coefficient, Z0 represents the known feeder impedance, and Z in represents the input impedance of the matching network.

9. The method according to claim 7, characterized in that: The step of determining the antenna input impedance according to the test network parameters and the matching network input impedance comprises: The antenna input impedance is determined according to an antenna network impedance formula, wherein the antenna network impedance formula includes: Among them, Z in represents the matching network input impedance, Z an represents the antenna input impedance, L1 is the first inductance value, L2 is the second inductance value, C1 is the matching capacitance value, and f is the antenna operating frequency.

10. The method according to claim 6, characterized in that The step of connecting the vector network analyzer between the open circuit section and the short circuit section of the broadband antenna comprises: The core wire of the test line of the vector network analyzer is connected to the open circuit section, and the outer conductor of the test line is connected to the short circuit section.

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