A radio frequency antenna detection system, method and wireless base station

Abstract

The application provides a radio frequency antenna detection system, method and wireless base station, which utilizes a voltage dividing circuit to reasonably allocate circuit voltage division design, sets different voltages collected by a collection module under different antenna in-place states, so that the in-place states of the first antenna and the second antenna can be judged according to the voltage Vadc collected by the collection module, the radio frequency module corresponding to the out-of-place antenna is closed in time, and radio frequency module damage caused by full reflection of radio frequency module output power is avoided. The embodiment does not need additional large equipment or complex structure to realize the antenna in-place detection function, greatly reduces the space occupation, makes it more suitable for small base stations, and meets the needs of small base stations for compact space layout. The embodiment realizes antenna detection through basic components such as a voltage dividing circuit, a collection module, a direct current power supply and a controller, the cost of these components is relatively low, and complex detection equipment is not needed, so that the hardware cost is effectively reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of communication, in particular to a radio frequency antenna detection system, method and wireless base station. BACKGROUND

[0002] An antenna is an important component of a wireless base station. If an antenna is not installed or not installed in place, the base station cannot normally radiate signals, and a standing wave will be formed due to the reflection of a high-power signal at an open circuit position, which will burn out the power amplifier of the base station. Therefore, the base station usually needs a detection mechanism for an in-place antenna.

[0003] Currently, the base station usually adopts an antenna standing wave ratio detection scheme to detect the antenna state, which has the problems of large space occupation and high cost, and is not suitable for small base stations. SUMMARY

[0004] The purpose of the embodiments of the present application is to provide a radio frequency antenna detection system, method and wireless base station to solve the problem of large space occupation and high cost of the prior art antenna standing wave ratio detection scheme for detecting the antenna state.

[0005] The radio frequency antenna detection system provided by the embodiments of the present application comprises a first radio frequency channel, a second radio frequency channel, a first antenna, a second antenna, a voltage dividing circuit, an acquisition module, a direct current power supply and a controller. The first radio frequency channel is connected to a first end of the first antenna, and a second end of the first antenna is connected to a first end of the voltage dividing circuit. The second radio frequency channel is connected to a first end of the second antenna, and a second end of the second antenna is connected to a second end of the voltage dividing circuit. A third end of the voltage dividing circuit is connected to the direct current power supply. A fourth end of the voltage dividing circuit is connected to an input end of the acquisition module. An output end of the acquisition module is connected to the controller. The controller is configured to determine whether the first antenna is in place and whether the second antenna is in place according to a voltage Vadc acquired by the acquisition module.

[0006] The first antenna is configured to transmit and receive radio frequency signals on the first radio frequency channel, and the second antenna is configured to transmit and receive radio frequency signals on the second radio frequency channel. When the antenna is in place, the antenna is connected to the ground. For example, if the first antenna is in place, a direct current loop is formed by the direct current power supply, the voltage dividing circuit, the first antenna and the ground. If the first antenna is not in place, a circuit between the first antenna and the ground is open, and a direct current loop is not formed in the circuit where the first antenna is located. If the second antenna is in place, a direct current loop is formed by the direct current power supply, the voltage dividing circuit, the second antenna and the ground. If the second antenna is not in place, a circuit between the second antenna and the ground is open, and a direct current loop is not formed in the circuit where the second antenna is located. Therefore, by reasonably distributing the voltage dividing circuit, the voltage values in different antenna in-place states are set, and the controller can accurately determine the in-place state of the first antenna and the second antenna according to the voltage Vadc acquired by the acquisition module.

[0007] In the above technical solution, a voltage divider circuit is used to rationally distribute the circuit voltage division design, and the voltage collected by the acquisition module is set to be different when different antennas are in place. Therefore, the presence status of the first antenna and the second antenna can be judged based on the voltage Vadc collected by the acquisition module, and the RF module corresponding to the antenna that is not in place can be turned off in time to avoid damage to the RF module caused by total reflection of the RF module output power. This embodiment does not require additional large equipment or complex structures to implement the antenna presence detection function, which greatly reduces the space occupied, making it more suitable for small base stations and meeting the requirements of small base stations for compact space layout. This embodiment implements antenna detection through basic components such as a voltage divider circuit, an acquisition module, a DC power supply, and a controller. These components are relatively low in cost and do not require complex detection equipment, thereby effectively reducing hardware costs.

[0008] In some optional embodiments, the voltage divider circuit includes: a first resistor, a second resistor and a third resistor; the second end of the first antenna is connected to the first end of the first resistor, and the second end of the first resistor is connected to the intersection; the second end of the second antenna is connected to the first end of the second resistor, and the second end of the second resistor is connected to the intersection; the DC power supply is connected to the intersection after passing through the third resistor; and the input end of the acquisition module is connected to the intersection.

[0009] In the above technical solution, when both the first antenna and the second antenna are not in place, the circuit containing the first antenna does not form a DC loop, the circuit containing the second antenna does not form a DC loop, the first resistor and the second resistor do not participate in voltage division, and the voltage Vdac at the intersection point collected by the acquisition module is independent of the resistance values ​​of the first resistor and the second resistor. When the first antenna is in place and the second antenna is not in place, the circuit containing the first antenna forms a DC loop, the circuit containing the second antenna does not form a DC loop, the first resistor and the third resistor form a voltage division, and the voltage Vdac at the intersection point collected by the acquisition module is related to the resistance values ​​of the first resistor and the third resistor. When the first antenna is not in place and the second antenna is in place, the circuit containing the first antenna does not form a DC loop, the circuit containing the second antenna forms a DC loop, the second resistor and the third resistor form a voltage division, and the voltage Vdac at the intersection point collected by the acquisition module is related to the resistance values ​​of the second resistor and the third resistor. When the first antenna is in place and the second antenna is in place, the circuit containing the first antenna forms a DC loop, and the circuit containing the second antenna also forms a DC loop. The first, second, and third resistors form a voltage divider. The voltage Vdac at the intersection point detected by the acquisition module is related to the resistance values ​​of the first, second, and third resistors. Therefore, by properly selecting the resistance values ​​of the first, second, and third resistors, the voltage Vdac at the intersection point detected by the acquisition module can be different when different antennas are in place.

[0010] In some alternative embodiments, the first, second and third resonant choke inductors are further included; the second end of the first resistor is connected to the junction through the first resonant choke inductor; the second end of the second resistor is connected to the junction through the second resonant choke inductor; and the acquisition module is connected to the junction through the third resonant choke inductor.

[0011] The resonant choke inductor has a small DC impedance and a large RF signal impedance, which can increase the RF signal isolation between the first and second RF channels. In a wireless base station, multiple RF modules work simultaneously, generating RF signals of various frequencies. Without good isolation measures, these signals can interfere with each other, causing signal quality to decline and affecting the communication performance of the base station.

[0012] In the above technical solution, the resonant choke inductor has a small DC impedance and a large RF signal impedance. In the circuit, the second end of the first resistor is connected to the junction through the first resonant choke inductor, the second end of the second resistor is connected to the junction through the second resonant choke inductor, and the acquisition module is connected to the junction through the third resonant choke inductor. Thus, mutual interference between the first and second RF channels is avoided, ensuring that each RF module can work independently and stably. Since the resonant choke inductor has a small DC impedance, the DC power supply can smoothly pass through the resonant choke inductor to provide a stable DC voltage for the circuit. Moreover, the DC impedance of the resonant choke inductor participates in voltage division.

[0013] In some alternative embodiments, the controller is further configured to:

[0014] If Vadc=V1, it is determined that neither the first antenna nor the second antenna is in place;

[0015] If Vadc=V2, it is determined that the first antenna is in place and the second antenna is not in place;

[0016] If Vadc=V3, it is determined that the first antenna is not in place and the second antenna is in place;

[0017] If Vadc=V4, it is determined that both the first antenna and the second antenna are in place;

[0018] wherein, ; ; ;

[0019] R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, R3 is the resistance value of the third resistor, R4 is the DC impedance value of the first antenna, R5 is the DC impedance value of the second antenna, is the DC impedance value of the first resonant choke inductor, The DC impedance value of the second resonant choke inductance.

[0020] In the technical solution, the antenna base is equipped with a DC path for shorting to the ground, the shorting resistance value of which is related to the transmitting signal power of the antenna, the shorting resistance value of the first antenna (i.e. the DC impedance value of the first antenna) is R4, and the shorting resistance value of the second antenna (i.e. the DC impedance value of the second antenna) is R5. In this embodiment, the voltage division function is realized by the voltage division resistors (the first resistor R1, the second resistor R2, and the third resistor R3) in cooperation with the resistors R4 and R5. In different antenna states, the voltage values output by the acquisition module after voltage division are different, and the voltage Vdac is controlled in a range that is convenient for distinguishing by reasonably setting the resistance values. It should be noted that the first resistor R1, the second resistor R2, the third resistor R3, and the resistors R4 and R5 on the antenna base should use high-precision resistors to avoid excessive errors affecting the detection results.

[0021] When neither the first antenna nor the second antenna is in place, the first antenna and the ground are disconnected, the second antenna and the ground are disconnected, and the circuit in which the first antenna is located and the circuit in which the second antenna is located do not form a DC loop. At this time, Vadc= .

[0022] When only the first antenna is in place, the second antenna and the ground are disconnected, the first antenna and the ground are connected, the current generated by the DC power supply VDC flows into the ground through the third resistor, the first resonant choke inductance, the first resistor, and the first antenna to form a loop, and at this time, Vadc= .

[0023] When only the second antenna is in place, the first antenna and the ground are disconnected, the second antenna and the ground are connected, the current generated by the DC power supply VDC flows into the ground through the third resistor, the second resonant choke inductance, the second resistor, and the second antenna to form a loop, and at this time, Vadc= .

[0024] When both the first antenna and the second antenna are in place, the first antenna and the second antenna and the ground are connected, the current generated by the DC power supply VDC flows into the ground through the third resistor, the first resonant choke inductance, the first resistor, and the first antenna to form a loop, and at the same time, the current generated by the DC power supply VDC flows into the ground through the third resistor, the second resonant choke inductance, the second resistor, and the second antenna to form a loop. At this time, Vadc= .

[0025] In some optional embodiments, the controller is further configured to: determine the type of the first antenna and determine the type of the second antenna according to the voltage Vadc collected by the acquisition module; and wherein the DC impedance of different types of antennas is different.

[0026] In the technical solution, the voltage collected by the collection module is different under the condition of different antenna types and different antenna in-place states by reasonably distributing the circuit voltage distribution design through the voltage distribution circuit, and the type of the in-place antenna can be determined by the power supply Vadc collected by the collection module.

[0027] In some optional embodiments, the controller is further configured to determine that the first antenna is in place and the first antenna is the first type of antenna and the second antenna is not in place when Vadc=V21.

[0028] If Vadc=V21, it is determined that the first antenna is in place, the first antenna is the first type of antenna, and the second antenna is not in place.

[0029] If Vadc=V22, it is determined that the first antenna is in place, the first antenna is the second type of antenna, and the second antenna is not in place.

[0030] If Vadc=V31, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is the first type of antenna.

[0031] If Vadc=V32, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is the second type of antenna.

[0032] If Vadc=V411, it is determined that the first antenna and the second antenna are both in place, and the first antenna and the second antenna are both the first type of antenna.

[0033] If Vadc=V412, it is determined that the first antenna and the second antenna are both in place, the first antenna is the first type of antenna, and the second antenna is the second type of antenna.

[0034] If Vadc=V421, it is determined that the first antenna and the second antenna are both in place, the first antenna is the second type of antenna, and the second antenna is the first type of antenna.

[0035] If Vadc=V422, it is determined that the first antenna and the second antenna are both in place, and the first antenna and the second antenna are both the second type of antenna.

[0036] Wherein, ; ; ; ; ; ; ; ; ; R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, R3 is the resistance value of the third resistor, R6 is the DC impedance value of the first type of antenna, R7 is the DC impedance value of the second type of antenna, is the DC impedance value of the first resonant choke inductance, The DC impedance value of the second resonant choke inductance.

[0037] In the technical solution, the voltage dividing function is realized by the voltage dividing resistors (the first resistor R1, the second resistor R2, and the third resistor R3) in cooperation with the possible resistors R6 and R7. In different antenna states and different antenna types, the voltage values output by the acquisition module after voltage division are different. By reasonably setting the resistance values, the voltage Vdac is controlled in an interval that is easy to distinguish.

[0038] In some optional embodiments, the first direct-current blocking capacitor and the second direct-current blocking capacitor are further included; the first radio frequency channel is connected to the first end of the first antenna through the first direct-current blocking capacitor, and the second radio frequency channel is connected to the first end of the second antenna through the second direct-current blocking capacitor.

[0039] In the technical solution, the direct-current blocking capacitors utilize the characteristics of small alternating current impedance and direct-current circuit breaking. The first radio frequency channel is connected to the first end of the first antenna through the first direct-current blocking capacitor, and the second radio frequency channel is connected to the first end of the second antenna through the second direct-current blocking capacitor. In this way, the direct-current is blocked by the direct-current blocking capacitors and cannot enter the first radio frequency channel and the second radio frequency channel. In a radio frequency circuit, many devices are sensitive to direct-current voltage and current, and the direct-current may cause these devices to overheat, be damaged, or even be broken down. The presence of the direct-current blocking capacitors effectively avoids the damage of the direct-current to the devices in the radio frequency circuit, improving the reliability and stability of the circuit.

[0040] In some optional embodiments, the acquisition module includes an ADC module or a voltage comparator module.

[0041] The ADC (analog-to-digital converter) module can convert analog voltage signals into digital signals, and its accuracy is usually represented by the number of bits. The higher the number of bits, the closer the converted digital value is to the true analog voltage value. The voltage dividing circuit generates different voltage values according to different antenna states and types, and the high-precision acquisition capability of the ADC module can ensure that these voltage values are accurately measured. This is crucial for accurately determining the antenna type and in-place state, as small voltage differences may correspond to different antenna combination situations. For example, when the values of V21 and V22 are very close, only a high-precision ADC module can accurately distinguish between them, thereby correctly determining the type and in-place state of the first antenna. The controller can determine the antenna state and type according to the voltage values collected by the ADC module in combination with the preset voltage thresholds (V21, V22, V31, V32, V411, V412, V421, and V422). At the same time, the collected data can be monitored and analyzed in real time to discover abnormal situations in a timely manner and handle them.

[0042] The voltage comparator module can compare the input analog voltage signal with a reference voltage, and output a corresponding digital signal (high or low) when the input voltage is higher or lower than the reference voltage. The response speed is very fast, usually in nanoseconds. If only the voltage threshold is needed to be quickly determined, without the need for accurate voltage value, the voltage comparator module can provide faster response speed. For example, when only need to determine whether the antenna is in place, a reference voltage can be set, when the collected voltage is higher than the reference voltage, the voltage comparator outputs high level, indicating that the antenna is in place; otherwise, it outputs low level, indicating that the antenna is not in place. This quick determination can reduce the response time of the system and improve the real-time performance of the system. Although the voltage comparator module cannot directly give the accurate voltage value, but by setting multiple comparators and reference voltages, different voltage ranges can be corresponded to different antenna combination situations. For example, multiple comparators are used to compare the collected voltage with different threshold values, and the antenna combination is determined according to the output combination of the comparators.

[0043] The method provided by the embodiment of the present application is applied to the controller of the radio frequency antenna detection system as described above, and the method comprises: judging whether the first antenna is in place and judging whether the second antenna is in place according to the voltage Vadc collected by the collection module.

[0044] In some optional embodiments, the method further comprises: in the case where V2, V3 and V4 are all different,

[0045] If Vadc=V1, it is determined that neither the first antenna nor the second antenna is in place;

[0046] If Vadc=V2, it is determined that the first antenna is in place and the second antenna is not in place;

[0047] If Vadc=V3, it is determined that the first antenna is not in place and the second antenna is in place;

[0048] If Vadc=V4, it is determined that both the first antenna and the second antenna are in place;

[0049] Wherein, ; ; ;

[0050] ; R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, R3 is the resistance value of the third resistor, R4 is the DC impedance value of the first antenna, R5 is the DC impedance value of the second antenna, is the DC impedance value of the first resonant choke inductance, a direct current impedance value of the second resonant choke inductance.

[0051] In some optional embodiments, the method further comprises judging the type of the first antenna and judging the type of the second antenna according to the voltage Vadc collected by the collecting module; wherein the direct current impedance values of different types of antennas are different.

[0052] In some optional embodiments, the method further comprises:

[0053] if Vadc = V21, it is determined that the first antenna is in place, the first antenna is a first type of antenna, and the second antenna is not in place;

[0054] if Vadc = V22, it is determined that the first antenna is in place, the first antenna is a second type of antenna, and the second antenna is not in place;

[0055] if Vadc = V31, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is a first type of antenna;

[0056] if Vadc = V32, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is a second type of antenna;

[0057] if Vadc = V411, it is determined that the first antenna and the second antenna are both in place, and the first antenna and the second antenna are both first type of antennas;

[0058] if Vadc = V412, it is determined that the first antenna and the second antenna are both in place, the first antenna is a first type of antenna, and the second antenna is a second type of antenna;

[0059] if Vadc = V421, it is determined that the first antenna and the second antenna are both in place, the first antenna is a second type of antenna, and the second antenna is a first type of antenna;

[0060] if Vadc = V422, it is determined that the first antenna and the second antenna are both in place, and the first antenna and the second antenna are both second type of antennas;

[0061] wherein, ; ; ; ; ; ; ; ; ; R1 is a resistance value of the first resistance, R2 is a resistance value of the second resistance, R3 is a resistance value of the third resistance, R6 is a direct current impedance value of the first type antenna, R7 is a direct current impedance value of the second type antenna, is a direct current impedance value of the first resonant choke inductance, is a direct current impedance value of the second resonant choke inductance.

[0062] The wireless base station provided by the embodiments of the present application comprises the radio frequency antenna detection system as described in any of the above.

[0063] The electronic device provided by the embodiments of the present application comprises a processor and a memory, the memory stores machine readable instructions executable by the processor, and the machine readable instructions are executed by the processor to perform the method as described in any of the above.

[0064] The computer program product provided by the embodiments of the present application comprises computer programs / instructions, and the computer programs / instructions are executed by the processor to implement the steps of the method as described in any of the above. BRIEF DESCRIPTION OF DRAWINGS

[0065] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0066] Figure 1 The functional module diagram of the radio frequency antenna detection system provided by the embodiments of the present application is shown;

[0067] Figure 2 The structural schematic diagram of the radio frequency antenna detection system provided by the embodiments of the present application is shown;

[0068] Figure 3 A possible structure of the electronic device provided by the embodiments of the present application is shown.

[0069] Figure: 1-processor, 2-memory, 3-communication interface, 4-communication bus. DETAILED DESCRIPTION

[0070] The technical solutions in the embodiments of the present application will be described below in combination with the drawings in the embodiments of the present application.

[0071] The purpose of one or more embodiments of the present application is to provide a radio frequency antenna detection system, method and wireless base station for detecting the in-place state of the antenna and the type of antenna.

[0072] Referring to Figure 1 , Figure 1 A radio frequency antenna detection system function module diagram provided by the embodiment of the application, specifically comprising: a first radio frequency channel, a second radio frequency channel, a first antenna, a second antenna, a voltage dividing circuit, an acquisition module, a direct current power supply and a controller.

[0073] The first radio frequency channel is connected to the first end of the first antenna, and the second end of the first antenna is connected to the first end of the voltage dividing circuit; the second radio frequency channel is connected to the first end of the second antenna, and the second end of the second antenna is connected to the second end of the voltage dividing circuit; the third end of the voltage dividing circuit is connected to the direct current power supply; the fourth end of the voltage dividing circuit is connected to the input end of the acquisition module; the output end of the acquisition module is connected to the controller; wherein the first end and the second end of the antenna are both ports on the antenna base. The radio frequency channel (RF Channel) refers to the complete circuit path between the antenna and the core part of the wireless communication device for transmitting and receiving radio frequency signals. The acquisition module includes an ADC or a voltage comparator, etc., for acquiring voltage.

[0074] The controller is configured to determine whether the first antenna is in place and whether the second antenna is in place according to the voltage Vadc acquired by the acquisition module.

[0075] The first antenna is configured to receive and transmit radio frequency signals on the first radio frequency channel, and the second antenna is configured to receive and transmit radio frequency signals on the second radio frequency channel.

[0076] When the antenna is in place, the antenna is connected to the ground, for example: if the first antenna is in place, the direct current power supply, the voltage dividing circuit, the first antenna and the ground form a direct current loop; if the first antenna is not in place, the first antenna and the ground are open circuit, and the circuit in which the first antenna is located does not form a direct current loop. If the second antenna is in place, the direct current power supply, the voltage dividing circuit, the second antenna and the ground form a direct current loop; if the second antenna is not in place, the second antenna and the ground are open circuit, and the circuit in which the second antenna is located does not form a direct current loop. Therefore, by reasonably distributing the voltage dividing circuit design, the voltage values under the in-place state of different antennas are set, and the controller can accurately determine the in-place state of the first antenna and the second antenna according to the voltage Vadc acquired by the acquisition module.

[0077] In the embodiment of the present application, the voltage collected by the acquisition module in different antenna in-place states is set to be different by using the voltage division circuit to reasonably allocate the circuit voltage division design, so that the in-place state of the first antenna and the second antenna can be judged according to the voltage Vadc collected by the acquisition module, and the corresponding radio frequency module of the out-of-place antenna is closed in time to avoid the damage of the radio frequency module caused by the full reflection of the radio frequency module output power. The antenna in-place detection function is realized without additional large equipment or complex structure in the embodiment, which greatly reduces the space occupation, makes it more suitable for small base stations, and meets the needs of small base stations for compact space layout. The antenna detection is realized by the basic components such as the voltage division circuit, the acquisition module, the direct current power supply and the controller in the embodiment, the cost of these components is relatively low, and complex detection equipment is not required, so that the hardware cost is effectively reduced.

[0078] Please refer to Figure 2 , Figure 2 A structure schematic diagram of a radio frequency antenna detection system provided by the embodiment of the present application.

[0079] In some optional embodiments, the voltage division circuit comprises: a first resistor, a second resistor and a third resistor;

[0080] The second end of the first antenna is connected to the first end of the first resistor, and the second end of the first resistor is connected to the junction point;

[0081] The second end of the second antenna is connected to the first end of the second resistor, and the second end of the second resistor is connected to the junction point;

[0082] The direct current power supply is connected to the junction point through the third resistor;

[0083] The input end of the acquisition module is connected to the junction point.

[0084] In the embodiment of the present application, when neither the first antenna nor the second antenna is in place, the circuit where the first antenna is located does not form a direct current loop, the circuit where the second antenna is located does not form a direct current loop, and the first resistor and the second resistor do not participate in voltage division, so the voltage Vdac at the junction point collected by the acquisition module is irrelevant to the resistance values of the first resistor and the second resistor.

[0085] When the first antenna is in place and the second antenna is not in place, the circuit where the first antenna is located forms a direct current loop, the circuit where the second antenna is located does not form a direct current loop, the first resistor and the third resistor form voltage division, and the voltage Vdac at the junction point collected by the acquisition module is relevant to the resistance values of the first resistor and the third resistor.

[0086] When the first antenna is not in place and the second antenna is in place, the circuit where the first antenna is located does not form a direct current loop, the circuit where the second antenna is located forms a direct current loop, the second resistor and the third resistor form voltage division, and the voltage Vdac at the junction point collected by the acquisition module is relevant to the resistance values of the second resistor and the third resistor.

[0087] When the first antenna is in place and the second antenna is in place, the circuit where the first antenna is located forms a direct current loop, the circuit where the second antenna is located also forms a direct current loop, the first resistance, the second resistance and the third resistance form a voltage division, and the voltage Vdac at the junction point collected by the collection module is related to the resistance values of the first resistance, the second resistance and the third resistance.

[0088] Therefore, by reasonably selecting the resistance values of the first resistance, the second resistance and the third resistance, the voltage Vdac at the junction point collected by the collection module under different antenna in-place states can be different.

[0089] In some optional embodiments, a first resonant choke inductor, a second resonant choke inductor and a third resonant choke inductor are further included.

[0090] The second end of the first resistance is connected to the junction point through the first resonant choke inductor;

[0091] The second end of the second resistance is connected to the junction point through the second resonant choke inductor;

[0092] The collection module is connected to the junction point through the third resonant choke inductor.

[0093] The resonant choke inductor has the characteristics of small direct current impedance and large radio frequency signal impedance, which can increase the radio frequency signal isolation degree between the first radio frequency channel and the second radio frequency channel.

[0094] In a wireless base station, when multiple radio frequency modules work at the same time, various frequency radio frequency signals will be generated. Without good isolation measures, these signals may interfere with each other, resulting in a decline in signal quality and affecting the communication performance of the base station.

[0095] In the embodiments of the present application, the resonant choke inductor has the characteristics of small direct current impedance and large radio frequency signal impedance. In the circuit, the second end of the first resistance is connected to the junction point through the first resonant choke inductor, the second end of the second resistance is connected to the junction point through the second resonant choke inductor, and the collection module is connected to the junction point through the third resonant choke inductor. Thus, mutual interference between the first radio frequency channel and the second radio frequency channel is avoided, and each radio frequency module can work independently and stably.

[0096] Since the resonant choke inductor has small direct current impedance, the direct current power supply can smoothly pass through the resonant choke inductor to provide a stable direct current voltage for the circuit. Moreover, the direct current impedance of the resonant choke inductor participates in voltage division, which specifically includes:

[0097] When neither the first antenna nor the second antenna is in place, the voltage Vdac at the junction point collected by the collection module is irrelevant to the resistance value of the first resistance, the direct current impedance of the first resonant choke inductor, the direct current impedance of the second resonant choke inductor and the resistance value of the second resistance.

[0098] When the first antenna is in place and the second antenna is not in place, the voltage Vdac at the junction point collected by the collection module is related to the resistance value of the first resistor, the DC impedance of the first resonant choke inductor, the resistance value of the third resistor and the DC impedance of the third resonant choke inductor.

[0099] When the first antenna is not in place and the second antenna is in place, the voltage Vdac at the junction point collected by the collection module is related to the resistance value of the second resistor, the DC impedance of the second resonant choke inductor, the resistance value of the third resistor and the DC impedance of the third resonant choke inductor.

[0100] When the first antenna is in place and the second antenna is in place, the voltage Vdac at the junction point collected by the collection module is related to the resistance value of the first resistor, the DC impedance of the first resonant choke inductor, the resistance value of the second resistor, the DC impedance of the second resonant choke inductor, the resistance value of the third resistor and the DC impedance of the third resonant choke inductor.

[0101] In some optional embodiments, the controller is further configured to:

[0102] When V2, V3 and V4 are all different,

[0103] If Vadc=V1, it is determined that neither the first antenna nor the second antenna is in place;

[0104] If Vadc=V2, it is determined that the first antenna is in place and the second antenna is not in place;

[0105] If Vadc=V3, it is determined that the first antenna is not in place and the second antenna is in place;

[0106] If Vadc=V4, it is determined that both the first antenna and the second antenna are in place;

[0107] Wherein, ; ; ;

[0108] ; R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, R3 is the resistance value of the third resistor, R4 is the DC impedance value of the first antenna, R5 is the DC impedance value of the second antenna, is the DC impedance value of the first resonant choke inductor, is the DC impedance value of the second resonant choke inductor.

[0109] In this embodiment, the antenna base is equipped with a DC path for shorting to ground. The shorting resistance value is related to the antenna's transmitted signal power. The shorting resistance value (i.e., the DC impedance value) of the first antenna is R4, and the shorting resistance value (i.e., the DC impedance value of the second antenna) of the second antenna is R5. This embodiment implements the voltage divider function by using voltage-dividing resistors (first resistor R1, second resistor R2, and third resistor R3) in conjunction with resistors R4 and R5. The voltage output by the acquisition module after voltage division varies in different antenna states. By properly setting the resistance values, the voltage Vdac is controlled within a distinguishable range. It should be noted that the first resistor R1, second resistor R2, third resistor R3, and resistors R4 and R5 on the antenna base should be high-precision resistors to avoid large errors that may affect the detection results.

[0110] When the first antenna and the second antenna are not in place, the circuit between the first antenna and the ground is open, the circuit between the second antenna and the ground is open, and the circuit where the first antenna is located and the circuit where the second antenna is located do not form a DC loop. At this time, Vadc = .

[0111] When only the first antenna is in place, the circuit between the second antenna and the ground is open, and the circuit between the first antenna and the ground is open. The current generated by the DC power supply VDC flows through the third resistor, the first resonant choke inductor, the first resistor, and the first antenna into the ground to form a loop. At this time, Vadc= .

[0112] When only the second antenna is in place, the circuit between the first antenna and the ground is open, and the circuit between the second antenna and the ground is open. The current generated by the DC power supply VDC flows through the third resistor, the second resonant choke inductor, the second resistor, and the second antenna into the ground to form a loop. At this time, Vadc= .

[0113] When the first antenna and the second antenna are both in place, there is a path between the first antenna and the second antenna and the ground. The current generated by the DC power supply VDC flows through the third resistor, the first resonant choke inductor, the first resistor, and the first antenna into the ground to form a loop. At the same time, the current generated by the DC power supply VDC flows through the third resistor, the second resonant choke inductor, the second resistor, and the second antenna into the ground to form a loop. At this time, Vadc= .

[0114] Specifically, the detection method provided in one embodiment of the present application includes the following steps:

[0115] Step S11: The base station is powered on and initialized.

[0116] Step S12: detecting the voltage value of the ADC_IN node (intersection point) periodically.

[0117] Step S13, comparing the detection voltage value with the preset voltage range table.

[0118] Step S14, judging the voltage range. For example:

[0119] V4-0.5V≤Vadc≤V4+0.5V, judging that both the first antenna and the second antenna are in place, at this time the base station works normally

[0120] V3-0.5V≤Vadc≤V3+0.5V, judging that the second antenna is in place and the first antenna is not in place, closing the first radio frequency channel.

[0121] V2-0.5V≤Vadc≤V2+0.5V, judging that the first antenna is in place and the second antenna is not in place, closing the second radio frequency channel.

[0122] V1-0.5V≤Vadc≤V1+0.5V, judging that neither the first antenna nor the second antenna is in place, closing the first radio frequency channel and the second radio frequency channel.

[0123] The embodiment detects the in-place situation of multiple antennas through ADC voltage detection, simplifies the detection circuit, saves the GPIO interface, and especially in the case of high requirements on volume and cost of micro stations, only the Transciever self AUX_ADC function can be used to achieve the purpose. By determining the in-place situation of different antennas, the switch state of the PA of different radio frequency channels is flexibly configured, in the case of abnormal antenna, the channel of the normal antenna can still work normally, and the service will not be completely interrupted. In the protection of the PA, the stability of the base station is improved.

[0124] In some optional embodiments, the controller is further configured to: determine the type of the first antenna and determine the type of the second antenna according to the voltage Vadc collected by the collection module; and wherein the direct current impedance of different types of antennas is different.

[0125] In the embodiment of the application, the voltage collected by the collection module is different under the condition of different antenna types and different in-place states of the antenna by using the voltage division circuit to reasonably allocate the circuit voltage division design. The type of the in-place antenna can also be determined by the power supply Vadc collected by the collection module.

[0126] In some optional embodiments, the controller is further configured to:

[0127] In the case that V21, V22, V31, V32, V411, V412, V421 and V422 are different,

[0128] If Vadc=V21, it is determined that the first antenna is in place, the first antenna is a first type of antenna, and the second antenna is not in place;

[0129] If Vadc=V22, it is determined that the first antenna is in place, the first antenna is the second type of antenna, and the second antenna is not in place;

[0130] If Vadc=V31, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is the first type of antenna;

[0131] If Vadc=V32, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is the second type of antenna;

[0132] If Vadc=V411, it is determined that the first antenna and the second antenna are both in place, and the first antenna and the second antenna are both the first type of antenna;

[0133] If Vadc=V412, it is determined that the first antenna and the second antenna are both in place, the first antenna is the first type of antenna, and the second antenna is the second type of antenna;

[0134] If Vadc=V421, it is determined that the first antenna and the second antenna are both in place, the first antenna is the second type of antenna, and the second antenna is the first type of antenna;

[0135] If Vadc=V422, it is determined that the first antenna and the second antenna are both in place, and the first antenna and the second antenna are both the second type of antenna;

[0136] wherein, ; ; ; ; ; ; ; ; ; R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, R3 is the resistance value of the third resistor, R6 is the DC impedance value of the first type of antenna, R7 is the DC impedance value of the second type of antenna, is the DC impedance value of the first resonant choke inductance, is the DC impedance value of the second resonant choke inductance.

[0137] In the embodiments of the present application, the voltage dividing function is realized by the voltage dividing resistors (the first resistor R1, the second resistor R2, and the third resistor R3) in cooperation with the possible resistors R6 and R7. In different antenna states and different antenna types, the voltage values output by the acquisition module after voltage division are different. By reasonably setting the resistance values, the voltage Vdac is controlled in an interval that is easy to distinguish.

[0138] In some optional embodiments, first and second DC blocking capacitors are further included;

[0139] The first radio frequency channel is connected to the first end of the first antenna through the first direct-current blocking capacitor, and the second radio frequency channel is connected to the first end of the second antenna through the second direct-current blocking capacitor.

[0140] In the embodiments of the present application, the direct-current blocking capacitor utilizes the characteristics of small alternating current impedance and direct current circuit breaking. The first radio frequency channel is connected to the first end of the first antenna through the first direct-current blocking capacitor, and the second radio frequency channel is connected to the first end of the second antenna through the second direct-current blocking capacitor. In this way, the direct current is blocked by the direct-current blocking capacitor and cannot enter the first radio frequency channel and the second radio frequency channel. In the radio frequency circuit, many devices are sensitive to direct current voltage and current, and the direct current may cause these devices to overheat, damage or even breakdown. The presence of the direct-current blocking capacitor effectively avoids the damage of the direct current to the radio frequency circuit devices, and improves the reliability and stability of the circuit.

[0141] In some optional embodiments, the acquisition module includes an ADC module or a voltage comparator module.

[0142] The ADC (analog-to-digital converter) module can convert analog voltage signals into digital signals, and its accuracy is usually represented by the number of bits. The higher the number of bits, the closer the converted digital value is to the true analog voltage value. The voltage dividing circuit generates different voltage values according to different antenna state and type combinations, and the high-precision acquisition capability of the ADC module can ensure that these voltage values are accurately measured. This is crucial for accurately determining the antenna type and in-place state, because small voltage differences may correspond to different antenna combination situations. For example, when the values of V21 and V22 are very close, only a high-precision ADC module can accurately distinguish between them, thereby correctly determining the type and in-place state of the first antenna. The controller can determine the antenna state and type according to the voltage values collected by the ADC module, in combination with the preset voltage thresholds (V21, V22, V31, V32, V411, V412, V421, and V422). At the same time, the collected data can also be monitored and analyzed in real time to discover abnormal situations in a timely manner and handle them.

[0143] The voltage comparator module can compare the input analog voltage signal with a reference voltage, and output a corresponding digital signal (high or low) when the input voltage is higher or lower than the reference voltage. The response speed is very fast, usually in nanoseconds. If only the voltage threshold is needed to be quickly determined, without the need for accurate voltage value, the voltage comparator module can provide faster response speed. For example, when only need to determine whether the antenna is in place, a reference voltage can be set, when the collected voltage is higher than the reference voltage, the voltage comparator outputs high level, indicating that the antenna is in place; otherwise, it outputs low level, indicating that the antenna is not in place. This quick determination can reduce the response time of the system and improve the real-time performance of the system. Although the voltage comparator module cannot directly give the accurate voltage value, different voltage ranges can be corresponded to different antenna combination situations by setting multiple comparators and reference voltages. For example, multiple comparators are used to compare the collected voltage with different threshold values, and the antenna combination is determined according to the output combination of the comparators.

[0144] It should be noted that in one or more embodiments described above, there are two branches to be detected (each branch to be detected includes one radio frequency channel and one antenna) connected to the junction, and in some other possible embodiments, there can be three or more branches to be detected, as long as the design of the voltage dividing resistor makes the theoretical value of the voltage collected by the acquisition module different in different in-place states or antenna types, so as to realize the in-place state detection and antenna type detection of multiple antennas.

[0145] The wireless base station provided by the embodiments of the present application comprises the radio frequency antenna detection system described in any of the above.

[0146] The radio frequency antenna detection method provided by the embodiments of the present application is applied to the controller of the radio frequency antenna detection system described in any of the above, and the method comprises the following steps.

[0147] According to the voltage Vadc collected by the acquisition module, it is determined whether the first antenna is in place and whether the second antenna is in place.

[0148] In some optional embodiments, the method further comprises the following steps.

[0149] In the case where V2, V3 and V4 are all different,

[0150] If Vadc=V1, it is determined that neither the first antenna nor the second antenna is in place;

[0151] If Vadc=V2, it is determined that the first antenna is in place and the second antenna is not in place;

[0152] If Vadc=V3, it is determined that the first antenna is not in place and the second antenna is in place;

[0153] If Vadc = V4, it is determined that both the first antenna and the second antenna are in place;

[0154] wherein,

[0155] R1 is a resistance value of the first resistor, R2 is a resistance value of the second resistor, R3 is a resistance value of the third resistor, R4 is a DC impedance value of the first antenna, R5 is a DC impedance value of the second antenna, L1 is a DC impedance value of the first resonant choke inductor, L2 is a DC impedance value of the second resonant choke inductor.

[0156] In some optional embodiments, the method further comprises:

[0157] According to the voltage Vadc collected by the collection module, the type of the first antenna is determined, and the type of the second antenna is determined; wherein the DC impedance values of different types of antennas are different.

[0158] In some optional embodiments, the method further comprises:

[0159] In the case where V21, V22, V31, V32, V411, V412, V421 and V422 are all different,

[0160] If Vadc = V21, it is determined that the first antenna is in place, the first antenna is a first type of antenna, and the second antenna is not in place;

[0161] If Vadc = V22, it is determined that the first antenna is in place, the first antenna is a second type of antenna, and the second antenna is not in place;

[0162] If Vadc = V31, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is a first type of antenna;

[0163] If Vadc = V32, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is a second type of antenna;

[0164] If Vadc = V411, it is determined that both the first antenna and the second antenna are in place, and both the first antenna and the second antenna are first type of antennas;

[0165] If Vadc = V412, it is determined that both the first antenna and the second antenna are in place, the first antenna is a first type of antenna, and the second antenna is a second type of antenna;

[0166] If Vadc = V421, it is determined that both the first antenna and the second antenna are in place, the first antenna is a second type of antenna, and the second antenna is a first type of antenna;​​​

[0167] If VADC = V422, it is determined that both the first antenna and the second antenna are in place, and both the first antenna and the second antenna are the second type of antenna;

[0168] wherein, R1 is a resistance value of the first resistor, R2 is a resistance value of the second resistor, R3 is a resistance value of the third resistor, R6 is a DC impedance value of the first type of antenna, R7 is a DC impedance value of the second type of antenna, is a DC impedance value of the first resonant choke inductance, is a DC impedance value of the second resonant choke inductance.

[0169] Specifically, the detection method provided by another embodiment of the application comprises the following steps:

[0170] In step S21, the base station is powered on and initialization is completed.

[0171] In step S22, the voltage value of the ADC_IN node is detected periodically.

[0172] In step S23, the detected voltage value is compared with a preset voltage range table.

[0173] In step S24, the voltage range is determined. For example, if the resistance R1 is 50 kΩ, the resistance R2 is 20 kΩ, the resistance R3 is 20 kΩ, the DC impedance of the ANT1 is 1 kΩ, the DC impedance of the ANT2 is 50 kΩ, and the DC impedance of the L1, L2 and L3 is 630 mΩ, then the VADC voltage value of each antenna in place is as shown in Table 1:

[0174] Table 1: Antenna in place situation corresponding to different VADC voltage value ranges

[0175]

[0176] According to the VADC voltage value range of each antenna in place situation in Table 1, it can be determined that the minimum voltage difference is 190 mV, and therefore a resistance with a resistance value precision of 1% or higher can meet the threshold judgment range.

[0177] 4. 50V < VADC≤5.00V, it is determined that neither the first antenna nor the second antenna is in place, and at this time, the first radio frequency channel and the second radio frequency channel are closed.

[0178] ​​​​​​​​4.00V < VADC≤4.5V, judge first antenna in position ANT2, second antenna not in position, open first radio frequency channel to transmit small power signal, close second radio frequency channel.

[0179] 3.70V < VADC≤4.00V, judge second antenna in position ANT2, first antenna not in position, open second radio frequency channel to transmit small power signal, close first radio frequency channel.

[0180] 3.50V < VADC≤3.70V, judge first antenna in position ANT1, second antenna not in position, open first radio frequency channel to transmit large power signal, close second radio frequency channel.

[0181] 3.20V < VADC≤3.50V, judge first antenna in position ANT2, second antenna in position ANT2, open first radio frequency channel to transmit small power signal, open second radio frequency channel to transmit small power signal.

[0182] 2.70V < VADC≤3.20V, judge first antenna in position ANT1, second antenna in position ANT2, open first radio frequency channel to transmit large power signal, open second radio frequency channel to transmit small power signal.

[0183] 2.40V < VADC≤2.70V, judge second antenna in position ANT1, first antenna not in position, open second radio frequency channel to transmit large power signal, close first radio frequency channel.

[0184] 2.20V < VADC≤2.40V, judge first antenna in position ANT2, second antenna in position ANT1, open first radio frequency channel to transmit small power signal, open second radio frequency channel to transmit large power signal.

[0185] 2.00V < VADC≤2.20V, judge first antenna in position ANT1, second antenna in position ANT1, open first radio frequency channel to transmit large power signal, open second radio frequency channel to transmit large power signal.

[0186] The embodiment detects the in-position state of multiple antennas through ADC voltage detection, simplifies the detection circuit, saves the GPIO interface, and especially in the case that the micro station has high requirements on volume and cost, only the Transciever can realize the function through the self-provided AUX_ADC function. By determining the in-position state of different antennas, the switch state of different radio frequency channel PAs and the size of antenna power transmission are flexibly configured, in the case that a certain antenna is abnormal, the channel of the normal antenna can still work normally, and the service will not be completely interrupted. In the case of protecting the PA, the stability of the base station is improved.

[0187] Figure 3A possible structure of an electronic device provided by an embodiment of the present application is shown. Refer to Figure 3 The electronic device includes a processor 1, a memory 2 and a communication interface 3, which are interconnected and communicate with each other through a communication bus 4 and / or other forms of connection mechanism (not shown).

[0188] The memory 2 includes one or more (only one is shown in the figure), which can be, but is not limited to, a random access memory (RAM), a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM) and the like. The processor 1 and other possible components can access, read and / or write data in the memory 2.

[0189] The processor 1 includes one or more (only one is shown in the figure), which can be an integrated circuit chip with signal processing capability. The above-mentioned processor 1 can be a general-purpose processor, including a central processing unit (CPU), a micro controller unit (MCU), a network processor (NP) or other conventional processors; it can also be a special-purpose processor, including a neural network processing unit (NPU), a graphics processing unit (GPU), a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. Moreover, when the processor 1 is multiple, part of them can be general-purpose processors, and the other part can be special-purpose processors.

[0190] The communication interface 3 includes one or more (only one is shown in the figure) and can be used for direct or indirect communication with other devices to interact data. The communication interface 3 can include an interface for wired and / or wireless communication.

[0191] One or more computer program instructions can be stored in the memory 2, and the processor 1 can read and run the computer program instructions to implement the method provided by the embodiments of the application.

[0192] It can be understood that, Figure 3 The structure shown is only schematic, and the electronic device can further include more or less components than those shown in the figure, or have a different structure from that shown. Figure 3 The components shown in the figure can be realized by hardware, software or a combination thereof. The electronic device can be a physical device such as a PC, a notebook computer, a tablet computer, a mobile phone, a server, an embedded device, etc., or a virtual device such as a virtual machine, a virtual container, etc. Moreover, the electronic device is not limited to a single device, but can also be a combination of multiple devices or a cluster of a large number of devices. Figure 3 Figure 3 The computer program product provided by the embodiments of the application includes computer programs / instructions, which are executed by the processor to implement the steps of any of the above methods.

[0193] In the embodiments provided in the present application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some communication interfaces, devices or units, and can be electrical, mechanical or other forms.

[0194] In addition, the units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0195] In addition, the units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place, or can be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiments of the present application.

[0196] Furthermore, the functional modules in each of the embodiments of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part. ​

[0197] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions.

[0198] The above description is merely illustrative of the application and not intended to be limiting. It will thus be appreciated that those skilled in the art will be able to devise various arrangements that, although not explicitly described or shown herein, embody the principles of the application and are included within its spirit and scope. Any modification, equivalent replacement or improvement made without departing from the spirit and principle of the application should be included in the scope of protection of the application.

Claims

1. A radio frequency antenna detection system, characterized in that: include: A first radio frequency channel, a second radio frequency channel, a first antenna, a second antenna, a voltage divider circuit, an acquisition module, a DC power supply, and a controller; The first RF channel is connected to the first end of the first antenna, and the second end of the first antenna is connected to the first end of the voltage divider circuit; the second RF channel is connected to the first end of the second antenna, and the second end of the second antenna is connected to the second end of the voltage divider circuit; the third end of the voltage divider circuit is connected to the DC power supply; the fourth end of the voltage divider circuit is connected to the input end of the acquisition module; and the output end of the acquisition module is connected to the controller; The controller is used to: determine whether the first antenna is in place and whether the second antenna is in place according to the voltage Vadc collected by the collection module; The voltage divider circuit includes: a first resistor, a second resistor and a third resistor; The second end of the first antenna is connected to the first end of the first resistor, and the second end of the first resistor is connected to the intersection point; The second end of the second antenna is connected to the first end of the second resistor, and the second end of the second resistor is connected to the intersection point; The DC power supply is connected to the intersection point after passing through the third resistor; The input end of the acquisition module is connected to the intersection; Also includes a first resonant choke inductor, a second resonant choke inductor and a third resonant choke inductor; The second end of the first resistor is connected to the intersection point through the first resonant choke inductor; The second end of the second resistor is connected to the junction point through the second resonant choke inductor; The acquisition module is connected to the intersection point through the third resonant choke inductor; The controller is also used for: When V2, V3 and V4 are all different, If Vadc=V1, it is determined that both the first antenna and the second antenna are not in place; If Vadc=V2, it is determined that the first antenna is in place and the second antenna is not in place; If Vadc=V3, it is determined that the first antenna is not in place and the second antenna is in place; If Vadc=V4, it is determined that both the first antenna and the second antenna are in position; in, ; ; ; R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, R3 is the resistance value of the third resistor, R4 is the DC impedance value of the first antenna, and R5 is the DC impedance value of the second antenna. is the DC impedance value of the first resonant choke inductor, is the DC impedance value of the second resonant choke inductor.

2. The system according to claim 1, wherein The controller is further configured to: determine the type of the first antenna and the type of the second antenna according to the voltage Vadc collected by the collection module; wherein different types of antennas have different DC impedance values.

3. The system according to claim 2, wherein: The controller is also used for: When V21, V22, V31, V32, V411, V412, V421 and V422 are all different, If Vadc=V21, it is determined that the first antenna is in place, the first antenna is a first type antenna, and the second antenna is not in place; If Vadc=V22, it is determined that the first antenna is in place, the first antenna is a second type antenna, and the second antenna is not in place; If Vadc=V31, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is a first type antenna; If Vadc=V32, it is determined that the first antenna is not in place, the second antenna is in place, and the second antenna is a second type antenna; If Vadc=V411, it is determined that the first antenna and the second antenna are both in position, and the first antenna and the second antenna are both first type antennas; If Vadc=V412, it is determined that both the first antenna and the second antenna are in position, the first antenna is a first type antenna, and the second antenna is a second type antenna; If Vadc=V421, it is determined that both the first antenna and the second antenna are in position, the first antenna is a second type antenna, and the second antenna is a first type antenna; If Vadc=V422, it is determined that the first antenna and the second antenna are both in position, and the first antenna and the second antenna are both second-type antennas; in, ; ; ; ; ; ; ; ; R1 is the resistance value of the first resistor, R2 is the resistance value of the second resistor, R3 is the resistance value of the third resistor, R6 is the DC impedance value of the first type antenna, and R7 is the DC impedance value of the second type antenna. is the DC impedance value of the first resonant choke inductor, is the DC impedance value of the second resonant choke inductor.

4. The system according to claim 1, wherein: Also includes a first DC blocking capacitor and a second DC blocking capacitor; The first radio frequency channel is connected to the first end of the first antenna through the first DC blocking capacitor, and the second radio frequency channel is connected to the first end of the second antenna through the second DC blocking capacitor.

5. The system according to claim 1, wherein: The acquisition module includes an ADC module or a voltage comparator module.

6. A radio frequency antenna detection method, characterized in that: A controller applied to the radio frequency antenna detection system according to any one of claims 1 to 5, wherein the method comprises: According to the voltage Vadc collected by the collection module, it is determined whether the first antenna is in place and whether the second antenna is in place.

7. A wireless base station, characterized in that: It comprises a radio frequency antenna detection system as described in any one of claims 1-5.

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