An automatic tuning transmitting antenna and method for RS103 testing

Abstract

The present invention belongs to, but is not limited to, the field of antenna technology, and particularly relates to an automatic tuning transmitting antenna and method for RS103 testing, including: an antenna element duct: allowing the antenna element with variable length to expand and contract within the duct; a tunable antenna element: made of soft and thin copper foil, capable of withstanding large currents, wound around the rotating column of a programmed control motor, and adjusting the length of the antenna element by the rotation of the programmed control motor; an optical fiber interface: connecting the optical fiber of the programmed control motor, and completing the program control of the motor used by the antenna element through the programmed control software of the testing system; a coaxial port: connecting the coaxial cable of the output power of the RF power amplifier, enabling the output power of the RF power amplifier to be transmitted to the antenna element, and the antenna element generating the required field strength at 1 m; a programmed control motor: controlling the length of the antenna element at different frequencies, and controlling the rotation of the motor through the programmed control software of the testing system to adjust the length of the element.

Description

Technical Field

[0001] The present invention belongs to, but is not limited to, the field of antenna technology, and particularly relates to an automatic tuning transmitting antenna and method for RS103 testing. Background Art

[0002] When conducting the RS103 10 kHz - 40 GHz radiation sensitivity test in accordance with GJB151B - 2013 / GJB152 - 97, since the frequency range of this project is too wide, the test system for the 10 kHz - 40 GHz radiation sensitivity test is divided according to the transmitting antenna. Generally, it can be divided into test subsystems with a total of 8 transmitting antennas covering 10 kHz - 30 MHz, 30 MHz - 100 MHz, 100 MHz - 1 GHz, 1 GHz - 2.5 GHz, 2.5 GHz - 6 GHz, 6 GHz - 18 GHz, 18 GHz - 26.5 GHz, and 26.5 GHz - 40 GHz. Among them, the transmitting antennas used in the 30 MHz - 100 MHz radiation sensitivity test system are biconical antennas, electric field generators, composite antennas, etc. These antennas are large in size, have a high standing wave, and require a power amplifier with a relatively high output power to drive to generate a high field strength. Generally, a 3500W power amplifier is required for driving, and at the same time, a relatively large test site size is needed.

[0003] In view of the above analysis, the technical problems that urgently need to be solved in the prior art are: the transmitting antennas used in the 30 MHz - 100 MHz radiation sensitivity test system are biconical antennas, electric field generators, composite antennas, etc. These antennas are large in size, have a high standing wave, and require a power amplifier with a relatively high output power to drive to generate a high field strength. Generally, a 3500W power amplifier is required for driving, and at the same time, a relatively large test site size is needed. Summary of the Invention

[0004] In view of the problems existing in the prior art, the present invention provides an automatic tuning transmitting antenna for RS103 testing.

[0005] The present invention is implemented as follows. An automatic tuning transmitting antenna for RS103 testing includes:

[0006] Antenna element duct: allowing the length - variable antenna element to expand and contract within the duct;

[0007] Tunable antenna element: made of soft and thin copper foil, capable of withstanding large currents, wound around the rotating column of a programmable motor, and adjusting the length of the antenna element by the rotation of the programmable motor;

[0008] Optical fiber interface: connecting the optical fiber of the programmable motor, and completing the programming control of the motor used for the antenna element through the programmable software of the test system;

[0009] Coaxial port: Connect the coaxial cable of the output power of the RF power amplifier to transmit the output power of the RF power amplifier to the antenna element, and the antenna element generates the required field strength at 1 m.

[0010] Programmable motor: Control the length of the antenna element at different frequencies. The rotation of the motor is controlled by the programmable software of the test system to adjust the length of the element.

[0011] Furthermore, the performance indicators of the antenna include:

[0012] 1) VSWR is 1.5:1;

[0013] 2) The maximum power it can withstand is 2500 W;

[0014] 3) The power required to generate 200 V / m is less than 1500 W;

[0015] 4) Antenna gain: 6.9 - 7.2 dBi;

[0016] 5) Harmonic suppression is greater than 25 dBc.

[0017] The present invention also provides a tuning method for an automatic tuning transmitting antenna, including the following steps:

[0018] (a) Use the programmable software to set the transmission frequency and send the frequency parameters to the programmable motor through the fiber optic interface;

[0019] (b) The programmable motor automatically adjusts the length of the tunable antenna element according to the frequency parameters to ensure that the physical length of the antenna matches the transmission frequency and reaches the best resonance state;

[0020] (c) During the adjustment process, the length and tuning state of the antenna are monitored in real time to ensure that the antenna element can quickly respond to frequency changes;

[0021] (d) After the adjustment is completed, the required RF signal is output through the antenna, and the electric field strength and power parameters of each transmission are recorded.

[0022] The present invention also provides an adjustment method for an automatic tuning antenna element for RS103 testing, including the following steps:

[0023] (a) Control the telescoping of the antenna element in the pipeline through the programmable motor to adjust the length of the antenna element according to different test frequencies;

[0024] (b) Use the copper foil antenna element to transmit signals, and automatically tune the physical length of the antenna through the programmable system to ensure that the antenna is in a resonant state;

[0025] (c) The length adjustment of the antenna element is carried out according to the preset frequency range to achieve frequency coverage from 30 MHz to 1 GHz.

[0026] The present invention also provides a method for automatically adjusting the antenna field strength, which is characterized by including the following steps:

[0027] (a) Connect the radio frequency power amplifier to the coaxial port of the automatically tuned transmitting antenna;

[0028] (b) Use a programmed motor to automatically adjust the physical length of the antenna element according to the test frequency, ensuring that the field strength of the transmitted signal reaches the specified 200 V / m at 1 meter;

[0029] (c) Adjust the antenna length in real time at different test frequencies to ensure that the field strength always meets the requirements of the RS103 standard, and record the electric field strength of each adjustment through the test system.

[0030] The present invention also provides a signal transmission method for an automatically tuned antenna used for electromagnetic compatibility testing, including the following steps:

[0031] (a) Connect the test system and the programmed motor of the antenna through a fiber optic interface and set the transmission frequency;

[0032] (b) After receiving the frequency command, the programmed motor automatically adjusts the length of the antenna element to match the optimal resonance state at different frequencies;

[0033] (c) Transmit the radio frequency power to the antenna element through the coaxial port, and adjust the output power of the power amplifier according to the field strength requirement to ensure that the required electric field strength is generated at 1 meter;

[0034] (d) Monitor the gain, harmonic suppression, and VSWR of the antenna, and adjust the antenna parameters according to the test requirements to ensure the accuracy and consistency of the test results.

[0035] Combined with the above technical solutions and the technical problems solved, the advantages and positive effects of the technical solution to be protected by the present invention are as follows:

[0036] The present invention solves the problems that the existing transmitting antenna is large in size, has a high standing wave, requires a high-power power amplifier with a high output power to generate a high field strength, generally requires a 3500W power amplifier for driving, and at the same time requires a large test site size.

[0037] The automatically tuned transmitting antenna for RS103 testing of the present invention solves multiple technical problems in the prior art in industrial applications, and achieves significant technological progress in terms of test efficiency, accuracy, automatic adjustment, and high-power operation.

[0038] 1. Problems solved in the prior art

[0039] (1) The traditional manual tuning has low efficiency

[0040] Existing antenna tuning systems typically require manual adjustment of the physical length of the antenna to adapt to different transmission frequencies. This manual operation is complex and time-consuming, especially in the RS103 test, where the antenna needs to be frequently adjusted to meet the test requirements of a wide frequency band range (usually from 30 MHz to 1 GHz). Manual adjustment of the antenna not only has low efficiency but also easily leads to inaccurate test results due to operation errors.

[0041] (2) Insufficient frequency range coverage

[0042] Traditional fixed antennas have limited tuning effects at different frequencies and cannot maintain a good resonant state within a wide frequency band range, resulting in low transmission efficiency of the antenna at certain frequencies. In addition, many antennas cannot meet the requirements of high field strength in the RS103 test and are prone to detuning at high frequencies or high powers.

[0043] (3) Stability issues at high powers

[0044] Under high-power transmission conditions, existing antenna designs often have difficulty maintaining stability during continuous high-power operation due to limitations in materials and structures, and are prone to problems such as overheating or material aging, resulting in antenna damage or test failure.

[0045] 2. Significant technological advancements

[0046] (1) Automatic tuning to improve test efficiency

[0047] The present invention realizes the automatic tuning function of the antenna element through a program-controlled motor. This system can automatically adjust the physical length of the antenna according to the test frequency to ensure that the antenna can reach the optimal resonant state at different frequencies. This automatic tuning eliminates the cumbersome steps of manual operation and greatly improves the test efficiency. Especially in an environment with rapid frequency switching, it realizes instant tuning and stable output.

[0048] (2) Efficient tuning within a wide frequency band range

[0049] Through the automatic adjustment of the antenna element, the present invention can cover a wide frequency band range from 30 MHz to 1 GHz. Within this frequency band, the tuning effect of the antenna remains good, and it can generate sufficient electric field strength at different frequencies to meet the requirements of the RS103 test. Compared with traditional antennas, the automatic tuning design of the present invention solves the problem of insufficient frequency range coverage, improves the transmission efficiency, and enables the antenna to maintain high gain and low VSWR within a wide frequency band.

[0050] (3) High power tolerance

[0051] The present invention uses a soft and thin copper foil as the material of the tunable antenna element, which can withstand large currents and ensure stable operation under high-power conditions. The maximum power-bearing capacity of the antenna is as high as 2500 W, which can meet the requirement of generating an electric field strength of up to 200 V / m in the RS103 test. This design significantly improves the stability and durability of the antenna in high-power operations, avoiding problems such as overheating or material aging.

[0052] (4) The accuracy of the test results is improved

[0053] In the present invention, the program-controlled motor is connected to the fiber optic interface to achieve real-time and precise adjustment of the antenna length, ensuring the perfect matching of the transmission frequency at each frequency point with the antenna length, thereby improving the accuracy of the generated field strength. The automated adjustment process eliminates human operation errors, ensuring the consistency and reliability of the test results. At the same time, the VSWR of the antenna is within 1.5:1, ensuring low reflection loss and further improving the test accuracy.

[0054] (5) The harmonic suppression ability is enhanced

[0055] The antenna designed in the present invention has a harmonic suppression ability greater than 25 dBc, which can effectively reduce the interference of harmonics on the test results. This characteristic is particularly suitable for high-frequency electromagnetic compatibility tests, ensuring the signal purity of the test system and improving the accuracy of the test.

[0056] The automatic tuning transmitting antenna for RS103 test of the present invention has achieved significant technological progress in the field of electromagnetic compatibility testing by solving the deficiencies of traditional antennas in terms of tuning efficiency, frequency coverage, high-power stability, and test accuracy. Its automatic tuning and high-power bearing capacity make this technology have broad application value in the RS103 tests of industries such as national defense, aerospace, and automotive electronics, greatly improving the efficiency and accuracy of the tests. Description of the Drawings

[0057] Figure 1 is a schematic structural diagram of the automatic tuning transmitting antenna for RS103 test provided by an embodiment of the present invention;

[0058] Among them: 1. Antenna element pipeline; 2. Tunable antenna element; 3. Fiber optic interface; 4. Coaxial port; 5. Program-controlled motor. Detailed Embodiment

[0059] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0060] The tunable antenna system of the present invention constructs an efficient radiation-emitting antenna structure through the collaborative work of five main parts: the antenna element duct, the tunable antenna element, the fiber optic interface, the coaxial port, and the programmable motor. First, the antenna element duct is the basic structure of the entire system, providing support and movement space for the tunable antenna element. The antenna element can expand and contract within the duct to ensure that its length is adjusted according to the change in frequency, thereby maintaining the optimal radiation performance of the antenna.

[0061] The tunable antenna element is made of soft and thin copper foil, having good electrical conductivity and flexibility. It is the core radiation part of the antenna system. The antenna element is designed to be able to rotate or expand and contract around the rotating column of the programmable motor to change its physical length. As the programmable motor rotates, the length of the element can be precisely adjusted according to the requirements of different frequencies, ensuring the maximization of the radiation efficiency of the antenna, especially achieving the best effect when the frequency corresponds to half of the wavelength.

[0062] As a key connection part of the programmable control system, the fiber optic interface is responsible for transmitting external control signals to the programmable motor of the antenna element through the optical fiber. The fiber optic interface not only ensures the high efficiency and stability of signal transmission but also effectively prevents electromagnetic interference, enabling the entire antenna tuning process to maintain reliability in a high-power working environment. Through the programmable software connected to the test system, the fiber optic interface realizes the real-time and precise control of the programmable motor.

[0063] The coaxial port is the key interface connecting the RF power amplifier and the antenna element, and the RF power is transmitted to the antenna element through the coaxial port. This interface ensures that the high-frequency signal output by the amplifier can be stably and efficiently transmitted to the antenna element, enabling it to generate the required electric field strength at a certain distance (usually 1 meter). The efficiency of RF power transmission is crucial for the overall working performance of the antenna.

[0064] The programmable motor is the core component responsible for adjusting the length of the antenna element. It realizes frequency tuning by rotating or expanding and contracting the antenna element. The operation of the programmable motor is controlled by the software of the test system and achieves precise adjustment through the instructions transmitted by the fiber optic interface. This design ensures that the antenna can maintain the best working state within different working frequency ranges (30 MHz to 100 MHz).

[0065] Overall, through precise component connection and collaborative work, the system realizes an efficient automatic tuning function, ensuring high radiation efficiency and stable output of the antenna at different frequencies. Through the reasonable configuration of the positions and functions of the various components of the antenna, it can generate the required electric field strength in the RS103 test, reduce the standing wave ratio, and improve the working stability of the antenna.

[0066] According to the working principle of the antenna, when the size of the antenna element reaches 1 / 2 of the wavelength corresponding to the current frequency, the radiation efficiency of the antenna reaches the maximum. Therefore, for the radiation emission antenna in the range of 30 MHz to 100 MHz, to ensure the maximum radiation efficiency, the size of the antenna is relatively large, the standing wave ratio is relatively high, and the power of the required power amplifier is relatively high. The radiation antenna of this solution is a tunable folded antenna, as Figure 1 shown.

[0067] Antenna element pipe: It allows the antenna element with variable length to stretch and contract inside the pipe to ensure that the shape of the antenna element meets the design requirements of the antenna shape, so as to achieve good radiation indicators;

[0068] Tunable antenna element: It is made of a soft and thin copper foil, can withstand large currents, and is wound around the rotating column of the program-controlled motor so that the length of the antenna element can be adjusted by the rotation of the program-controlled motor;

[0069] Optical fiber interface: This interface is used to connect the optical fiber of the program-controlled motor so that the program-controlled software of the test system can complete the program control of the motor used by the antenna element;

[0070] Coaxial port: It is used to connect the coaxial cable of the output power of the RF power amplifier so that the output power of the RF power amplifier can be transmitted to the antenna element, and the antenna element generates the required field strength at a certain distance (usually 1 m);

[0071] Program-controlled motor: It is mainly used to control the length of the antenna element at different frequencies. The rotation of the motor is controlled by the program-controlled software of the test system to adjust the length of the element.

[0072] The performance indicators of the above antenna are as follows:

[0073] 1) VSWR (typical value) 1.5:1;

[0074] 2) Maximum power withstand 2500 W;

[0075] 3) The power required to generate 200 V / m (@1 m) is less than 1500 W;

[0076] 4) Antenna gain: 6.9 - 7.2 dBi;

[0077] 5) Harmonic suppression is greater than 25 dBc;

[0078] The tunable folded antenna of the present invention realizes its functions through the coordinated work of five main parts: the antenna element duct, the tunable antenna element, the optical fiber interface, the coaxial port, and the programmable motor. First of all, the antenna element duct plays the role of supporting and protecting the antenna element. The antenna element can freely expand and contract inside the duct to adjust its length to meet the requirements of different frequencies. This design ensures that the shape of the antenna can achieve the best radiation effect at different frequencies, improving the overall performance of the antenna.

[0079] The tunable antenna element is the core part of the antenna. It is made of soft and thin copper foil, which has extremely strong electrical conductivity and can withstand large currents. This copper foil structure is not only lightweight but also easy to change the length of the antenna element under the action of the programmable motor. By adjusting the length of the element, the antenna can maximize the matching of the current operating frequency, thereby improving the radiation efficiency. Especially in the case of the half-wavelength of the operating frequency, the radiation efficiency of the antenna reaches the maximum.

[0080] The optical fiber interface is used to connect the programmable motor and the test system to ensure that the tuning process of the antenna can be precisely controlled through the test system. The use of the optical fiber interface not only improves the transmission efficiency of the control signal but also reduces electromagnetic interference, ensuring the stability of the system during high-power operations. Through the software control of the test system, the rotation of the motor can be adjusted in real time, and then the length of the antenna element can be adjusted.

[0081] The coaxial port connects the coaxial cable of the output power of the RF power amplifier and is used to transmit the RF power of the amplifier to the antenna element. After receiving the power signal, the antenna element generates the required field strength at a distance of 1 meter. To ensure that the output power of the antenna meets the radiation emission standard, this coaxial port design ensures the high efficiency and stability of power transmission.

[0082] The programmable motor is a key component for antenna tuning. It adjusts the operating frequency of the antenna by controlling the length of the antenna element. Under the command of the programmable software of the test system, the programmable motor automatically adjusts the length of the element according to the current frequency. Through the precise control of the motor, the antenna can achieve the best radiation efficiency within different operating frequency ranges (30 MHz - 100 MHz), thereby ensuring a high field strength output while reducing power consumption.

[0083] Finally, the performance indicators of this antenna ensure its stability and high efficiency at different frequencies. Its VSWR value is 1.5:1, it can withstand a maximum power output of 2500 W, the power required to generate 200 V / m at a distance of 1 meter is less than 1500 W, the antenna gain is 6.9 - 7.2 dBi, and the harmonic suppression is greater than 25 dBc. These performance indicators enable the antenna to still maintain good performance output under high-power transmission and environmental interferences such as clouds and noise, meeting the requirements of the RS103 test.

[0084] The detailed working principle of the automatic tuning transmitting antenna for RS103 testing can be divided into six key parts, covering from the physical structure, signal transmission, automatic tuning, the working principle of the antenna element to the control and performance of the entire system.

[0085] 1. Antenna Element Duct and Working Principle of Tunable Antenna Element

[0086] The antenna element duct is the core structure of the RS103 test antenna, mainly used to accommodate the tunable antenna element and provide space for the expansion and contraction of the antenna element. The antenna element is made of soft and thin copper foil, with high conductivity and flexibility, and can expand and contract along the length direction of the duct. Through this structural design, the physical length of the antenna can be precisely adjusted according to the requirements of the transmission frequency. Different frequencies require different antenna lengths to achieve the best resonance state, and this adjustment is completed through the expansion and contraction of the antenna element, ensuring that the antenna maintains the best working state at different frequencies.

[0087] 2. Program-Controlled Motor and Automatic Tuning Control

[0088] The program-controlled motor is responsible for driving the expansion and contraction of the antenna element. This motor is connected to the program-controlled software of the test system and can adjust the physical length of the antenna in real time according to the set frequency. During the test, the motor adjusts the length of the antenna according to the test requirements to adapt to different transmission frequencies, thereby ensuring that the antenna maintains a good tuning state within a wide frequency band. The precise control of the program-controlled motor can realize the automatic tuning process, reduce the errors and time of manual adjustment, and improve the test efficiency.

[0089] 3. Fiber Optic Interface and System Control

[0090] The fiber optic interface connects the program-controlled motor and the test system and is the communication bridge of the entire control system. The test system sends control commands to the program-controlled motor through the fiber optic interface to precisely control the length adjustment of the antenna element. The use of fiber optic communication avoids the influence of electromagnetic interference, ensures the stability and fast response of signal transmission, and is especially suitable for high-precision test environments. Through the program-controlled software, the test personnel can monitor and adjust the tuning state of the antenna in real time to ensure that the frequency of each signal transmission matches the antenna length, thereby maximizing the field strength output.

[0091] 4. Coaxial Port and RF Power Transmission

[0092] The coaxial port equipped on the RS103 test antenna is used for the transmission of radio frequency signals between the radio frequency power amplifier and the antenna element. The coaxial cable transmits the amplified radio frequency power through the coaxial port, ensuring that the signal can be transmitted to the antenna element efficiently and with low loss. In this way, the radio frequency signal can drive the antenna element to generate the required electric field intensity. In a high-power test environment, the antenna needs to transmit large currents, and the design of the copper foil antenna element can withstand these high-power signals, ensuring its stable operation and achieving the field strength that meets the RS103 standard.

[0093] 5. Automatic Tuning and Frequency Matching

[0094] The automatic tuning function of the antenna is realized through the real-time control of the programmed motor. During the test, when the test frequency changes, the physical length of the antenna element will be automatically adjusted according to the instructions of the programmed software. The adjusted antenna length matches the transmission frequency, ensuring that the antenna is in a resonant state, thereby improving the transmission efficiency of the antenna. This automatic tuning process eliminates the complexity of manual adjustment, makes the test process more efficient, and ensures that the best electric field intensity can be achieved at each frequency point.

[0095] 6. Performance Indicators and Field Strength Generation

[0096] The performance indicators of the RS103 test antenna determine its performance in actual tests. Through the adjustment of the tunable antenna element, the antenna can achieve a low VSWR (1.5:1) and has a high power tolerance (up to 2500W). In the test of generating a 200V / m field strength, the power required by the antenna is less than 1500W, showing high energy efficiency. At the same time, the gain of the antenna is 6.9 - 7.2dBi, ensuring that the transmitted signal can effectively cover the test area, and the harmonic suppression is greater than 25dBc, reducing the impact of harmonics on the test results. These performance indicators ensure that the antenna can meet the strict requirements of the RS103 standard and can maintain a stable working state in various complex test environments.

[0097] In summary, the RS103 test automatic tuning transmitting antenna can automatically tune and output a stable high field strength at different frequencies through the telescopic design of the soft copper foil antenna element, the automatic adjustment of the programmed motor, the interference-free control of the fiber optic interface, and the efficient radio frequency transmission of the coaxial port, greatly improving the efficiency and accuracy of the RS103 test.

[0098] The following are two specific application examples of the RS103 test automatic tuning transmitting antenna in the industry:

[0099] Example 1: Electromagnetic Compatibility (EMC) Testing in Defense and Aerospace

[0100] The RS103 standard is an important standard for evaluating the immunity of defense and aerospace equipment in the electromagnetic environment. In this field, equipment needs to withstand the interference of strong electromagnetic fields and still be able to operate normally in various electromagnetic environments. The RS103 test uses an automatically tuned transmitting antenna in the following scenarios:

[0101] Test the electromagnetic interference immunity of military communication equipment, radar systems, flight control systems, etc.

[0102] By using an automatically tuned transmitting antenna, it is possible to emit high-intensity electromagnetic fields in a wide frequency band, simulating electromagnetic interference scenarios of different frequencies. The automatic tuning function can automatically adjust the length of the antenna according to different test frequencies, thus ensuring the accuracy of the test field strength. Testers can conduct immunity tests on various military equipment during the test process to ensure that the equipment still operates normally in extreme electromagnetic environments.

[0103] The automatic tuning function of this antenna significantly reduces the time for manual adjustment, improves the test efficiency, and at the same time improves the working stability at high power, ensuring the accuracy and consistency of the test results.

[0104] Example 2: Electromagnetic Compatibility (EMC) Testing of Automotive Electronic Equipment

[0105] Modern automotive electronic equipment (such as autonomous driving systems, intelligent sensors, entertainment systems, etc.) operates in complex electromagnetic environments. The RS103 standard is also applicable to evaluating the electromagnetic interference immunity of these equipment. The RS103 test uses an automatically tuned transmitting antenna widely in the EMC testing of automotive electronics:

[0106] Test the electromagnetic interference immunity performance of automotive control systems, in-vehicle communication systems, and other sensitive electronic equipment.

[0107] In the test laboratories of automotive manufacturers, high-intensity electromagnetic fields are emitted through an automatically tuned antenna to simulate the impact of electromagnetic interference in the external environment on automotive electronic equipment. The automatic tuning function of this equipment can quickly adjust the physical length of the antenna according to different test frequencies to ensure that the antenna can generate the required field strength at different frequencies. Automotive manufacturers can conduct fast and accurate EMC tests through this equipment to ensure that the electronic system still operates normally in a strong electromagnetic interference environment.

[0108] The automated design of this antenna makes the entire test process more efficient and convenient, especially suitable for electromagnetic compatibility tests with frequent frequency changes. At the same time, its high power tolerance ensures the test reliability under high-power emission conditions.

[0109] As can be seen from these two embodiments, the RS103 test automatic tuning transmitting antenna has wide applications in fields such as national defense, aerospace, and automotive electronics. Its automatic tuning and efficient transmitting functions ensure the evaluation of the anti-interference performance of devices in complex electromagnetic environments.

[0110] In the description of the present invention, unless otherwise specified, "a plurality of" means two or more; the orientation or positional relationships indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention. In addition, terms such as "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0111] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention by those skilled in the art within the technical scope disclosed by the present invention shall be covered by the protection scope of the present invention.

Claims

1. An automatic tuning transmitting antenna for RS103 testing, characterized in that: include: An antenna array tube, used to accommodate a tunable antenna array, wherein the antenna array can be extended and retracted along the length direction of the tube to adjust the physical length of the antenna; A tunable antenna element, made of copper foil, is wrapped around a rotating column of a programmable motor, and the antenna element can be adjusted in length by rotating the programmable motor; The programmable motor is used to control the extension and retraction of the tunable antenna array. The length of the antenna array can be adjusted through the programmable software to meet the needs of different frequencies. Optical fiber interface, connecting the program-controlled motor and the test system, controlling the program-controlled motor through the program-controlled software to achieve automatic tuning of the antenna array; The coaxial port is used to connect the coaxial cable of the RF power amplifier to transmit the RF power output to the antenna array to generate the field strength required for the test.

2. The RS103 test automatic tuning transmitting antenna according to claim 1, characterized in that: The tunable antenna element is made of soft and thin copper foil, which can withstand large current and ensure that the antenna works stably under high power conditions.

3. The RS103 test automatic tuning transmitting antenna according to claim 1, characterized in that: The program-controlled motor is connected to the test system via an optical fiber interface, and the rotation of the motor is controlled in real time by the program-controlled software in the test system, so as to adjust the length of the antenna element to adapt to the signal transmission of different frequencies.

4. The RS103 test automatic tuning transmitting antenna according to claim 1, characterized in that: The coaxial port is connected to the coaxial line of the output port of the radio frequency power amplifier, ensuring that the radio frequency power is transmitted from the power amplifier to the antenna array, and the antenna array generates the required electric field strength at 1 meter.

5. The RS103 test automatic tuning transmitting antenna according to claim 1, characterized in that: The length of the antenna element can be automatically adjusted according to frequency changes during the test process by a programmable motor, thereby improving the tuning efficiency of the antenna and the accuracy of field strength generation.

6. The RS103 test automatic tuning transmitting antenna according to claim 1, characterized in that: The performance indicators of the antenna include VSWR of 1.5:1, maximum power handling capacity of 2500W, power required to generate a field strength of 200V / m of less than 1500W, antenna gain of 6.9~7.2dBi, and harmonic suppression greater than 25dBc.

7. A method for tuning an automatic tuning transmitting antenna using the antenna of claim 1, characterized in that: The following steps are involved: (a) Use the program control software to set the transmission frequency and send the frequency parameters to the program control motor through the optical fiber interface; (b) The programmable motor automatically adjusts the length of the tunable antenna element according to the frequency parameters to ensure that the physical length of the antenna matches the transmission frequency and achieves the optimal resonance state; (c) During the adjustment process, the length and tuning status of the antenna are monitored in real time to ensure that the antenna element can respond quickly to frequency changes; (d) After the adjustment is completed, the required RF signal is output through the antenna, and the electric field strength and power parameters of each transmission are recorded.

8. A method for adjusting an automatic tuning antenna element for RS103 testing using the antenna of claim 1, characterized in that: The following steps are involved: (a) The antenna array is controlled to extend and retract in the pipeline by a programmable motor, so that the length of the antenna array can be adjusted according to different test frequencies; (b) using an antenna element to transmit signals, and automatically tuning the physical length of the antenna through a programmable control system to ensure that the antenna is in a resonant state; (c) The length of the antenna array is adjusted according to the preset frequency range to achieve frequency band coverage from 30 MHz to 1 GHz.

9. A method for automatically adjusting antenna field strength using the antenna of claim 1, characterized in that: The following steps are involved: (a) Connect the RF power amplifier to the coaxial port of the automatic tuning transmitting antenna; (b) Use a programmable motor to automatically adjust the physical length of the antenna array according to the test frequency to ensure that the field strength of the transmitted signal reaches the specified 200V / m at 1 meter; (c) The antenna length is adjusted in real time at different test frequencies to ensure that the field strength always meets the requirements of the RS103 standard, and the electric field strength of each adjustment is recorded through the test system.

10. A signal transmission method of an automatic tuning antenna for electromagnetic compatibility testing using the antenna of claim 1, characterized in that: The following steps are involved: (a) Connect the test system to the programmable motor of the antenna through the optical fiber interface and set the transmission frequency; (b) After receiving the frequency command, the programmable motor automatically adjusts the length of the antenna array to match the optimal resonance state at different frequencies; (c) Transmitting radio frequency power to the antenna array through the coaxial port and adjusting the output power of the power amplifier according to the field strength requirements to ensure that the antenna array generates the required electric field strength at 1 meter; (d) Monitor the antenna gain, harmonic suppression and VSWR, and adjust the antenna parameters according to the test requirements to ensure the accuracy and consistency of the test results.

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