Passive frequency conversion wall-mounted antenna and indoor double-path distributed antenna system

Abstract

The utility model relates to the technical field of wireless communication, and provides a passive frequency conversion wall-mounted antenna and an indoor double-path distributed antenna system, and the wall-mounted antenna comprises a reflecting plate, a high-frequency oscillator, a low-frequency oscillator, and a passive frequency conversion module. The high-frequency oscillator and the low-frequency oscillator are both arranged on the reflecting plate; the passive frequency conversion module is provided with an input port connected with a cable, the input port can input radio frequency signals with different polarizations through a feeder line, and the passive frequency conversion module is used for carrying out frequency conversion and distribution on the input radio frequency signals; the high-frequency oscillator and the low-frequency oscillator are both in communication connection with the passive frequency conversion module, and at least one of the high-frequency oscillator and the low-frequency oscillator is a dual-polarization oscillator. According to the utility model, through the arrangement of the passive frequency conversion module, only one feeder line is needed during connection, single-port input of the dual-polarized antenna is realized, transformation of a single-path distributed antenna system is facilitated, and the transformation difficulty and the transformation cost are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of wireless communication, in particular to a passive frequency-converting wall-mounted antenna and an indoor dual-path distributed antenna system. Background Art

[0002] With the development of network technology, various ultra-high-definition video, cloud games, VR, AR and other services are developing rapidly, and users have higher requirements for service rates and service perception experience in indoor areas. Indoor special scenes, such as elevators and corridors, also have higher requirements for antenna coverage capabilities.

[0003] In the related art, the indoor construction is mainly based on the single-channel distributed antenna system (DAS) indoor distributed system. This solution can provide a higher single-stream signal rate for the indoor, but it is difficult to achieve the multi-input multi-output (MIMO) signal effect with single-stream information transmission, which limits the improvement of service rate. In the related art, the wall-mounted antenna uses two-port input, which requires the construction of a new feeder, power divider, coupler and other devices when renovating the single-channel distributed antenna system (DAS) to match the number of ports of this wall-mounted antenna, which increases the difficulty of renovation and construction costs. Utility Model Content

[0004] The utility model provides a passive frequency-converting wall-mounted antenna, which is used to solve the defect of difficult transformation of a single-channel distributed antenna system in the prior art and realizes rapid transformation of the wall-mounted antenna.

[0005] The utility model provides a passive frequency-converting wall-mounted antenna, comprising:

[0006] Reflective panels;

[0007] A high frequency vibrator is arranged on the reflecting plate;

[0008] A low-frequency vibrator is arranged on the reflection plate and arranged side by side with the high-frequency vibrator;

[0009] A passive frequency conversion module, having an input port connected to a feeder, the input port being capable of inputting radio frequency signals of different polarizations through the feeder, the passive frequency conversion module being used for frequency conversion and distribution of the input radio frequency signals;

[0010] Wherein, the high frequency vibrator and the low frequency vibrator are both communicatively connected with the passive frequency conversion module, so that the passive frequency conversion module can input the allocated frequencies into the high frequency vibrator and the low frequency vibrator respectively;

[0011] Wherein, at least one of the high-frequency oscillator and the low-frequency oscillator is a dual-polarization oscillator.

[0012] The passive frequency-converting wall-mounted antenna provided by the utility model also includes an adjustment baffle, which is arranged between the high-frequency vibrator and the low-frequency vibrator. The adjustment baffle is used to adjust the radiation direction of the high-frequency vibrator so that the radiation direction of the high-frequency vibrator is tilted downward.

[0013] According to the passive frequency-converting wall-mounted antenna provided by the utility model, the adjustment baffle is arranged perpendicular to the reflection plate, and the extension height of the adjustment baffle in the vertical direction is located between the plane where the high-frequency vibrator is located and the plane where the low-frequency vibrator is located.

[0014] According to the passive frequency-converting wall-mounted antenna provided by the utility model, one of the high-frequency vibrator and the low-frequency vibrator is a single-polarized vibrator, and the other of the high-frequency vibrator and the low-frequency vibrator is a dual-polarized vibrator.

[0015] According to the passive frequency-converting wall-mounted antenna provided by the utility model, the low-frequency vibrator is a single-polarized vibrator, and the high-frequency vibrator is a dual-polarized vibrator.

[0016] According to the passive frequency conversion wall-mounted antenna provided by the utility model, a splitter, a mixer and a filter are integrated in the passive frequency conversion module, the mixer and the filter are both connected to the splitter, the splitter is connected to the input port, and the splitter is used to divide the radio frequency signals of different polarizations input by the same feeder into multiple paths, and the radio frequency signal in each path is processed by the mixer or the filter.

[0017] According to the passive frequency conversion wall-mounted antenna provided by the utility model, the passive frequency conversion module also has a first connection port, a second connection port and a third connection port, the first connection port is connected to the low-frequency vibrator, and the second connection port and the third connection port are both connected to the high-frequency vibrator.

[0018] According to the passive frequency-converting wall-mounted antenna provided by the utility model, the low-frequency vibrator is connected to the reflecting plate through a supporting column so that the low-frequency vibrator is higher than the high-frequency vibrator.

[0019] According to the passive frequency conversion wall-mounted antenna provided by the utility model, the passive frequency conversion module is arranged at the bottom of the low-frequency vibrator.

[0020] The utility model also provides an indoor dual-path distributed antenna system, comprising a frequency conversion signal source host and a passive frequency conversion wall-mounted antenna according to any one of the above embodiments, which is communicatively connected to the frequency conversion signal source host.

[0021] Through any of the above embodiments, the utility model has at least the following beneficial effects:

[0022] The utility model provides a passive frequency conversion wall-mounted antenna, which, through the setting of a passive frequency conversion module, requires only one feeder line when connecting, realizes a single-port input of a dual-polarized antenna, is beneficial to the transformation of a single-channel distributed antenna system, and reduces the difficulty and cost of the transformation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the passive frequency conversion wall-mounted antenna provided by the utility model;

[0025] Figure 2 It is a schematic diagram of the principle of the passive frequency conversion module in the passive frequency conversion wall-mounted antenna provided by the utility model;

[0026] Figure 3 It is a schematic diagram of the principle of signal radiation of the passive frequency conversion wall-mounted antenna provided by the utility model.

[0027] Reference numerals:

[0028] 10. Reflector; 20. High-frequency oscillator; 30. Low-frequency oscillator; 40. Adjustment baffle; 50. Passive frequency conversion module; 60. Feeder. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0031] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0032] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0033] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0034] With the continuous improvement of 5G network construction, the number of 5G users continues to grow, which has gradually increased the network requirements for indoor areas. Special indoor scenes, such as elevators and corridors, also have higher requirements for antenna coverage. At present, the indoor network construction of various communication operators is mainly based on single-channel distributed antenna system (DAS) indoor system, which can only provide 5G services with the rate effect of single-stream signal. This network solution can no longer meet the needs of user and business development. The indoor system realizes MIMO signal effect and improves service rate, which is an urgent problem to be solved in the construction of 5G indoor network.

[0035] In the related art, a conventional single-channel DAS has only one feeder line, while the related dual-channel wall-mounted antenna requires access to two input ports, which requires the construction of a new feeder line, power divider, coupler, antenna and other devices when modifying the single-channel DAS. This greatly increases the difficulty of modification and increases the cost of modification. Based on this, the utility model provides a wall-mounted antenna to solve the above problems.

[0036] Combine the following Figure 1 The utility model describes a passive frequency conversion wall-mounted antenna, which is constructed to be suitable for the application environment of indoor passive mobile network. The passive wall-mounted antenna includes a reflector 10, a high-frequency vibrator 20, a low-frequency vibrator 30 and a passive frequency conversion module 50; the reflector 10 is used to support the entire wall-mounted antenna, and the high-frequency vibrator 20 is arranged on the reflector 10; the low-frequency vibrator 30 is arranged on the reflector 10 and arranged side by side with the high-frequency vibrator 20; the passive frequency conversion module 50 has an input port connected to a feeder 60, and the input port can input radio frequency signals of different polarizations through the feeder, and the passive frequency conversion module 50 is used to convert and distribute the input radio frequency signals; wherein the high-frequency vibrator 20 and the low-frequency vibrator 30 are both communicatively connected to the passive frequency conversion module 50, so that the passive frequency conversion module 50 can input the distributed frequencies into the high-frequency vibrator 20 and the low-frequency vibrator 30 respectively; at least one of the high-frequency vibrator 20 and the low-frequency vibrator 30 is a dual-polarized vibrator.

[0037] Specifically, the passive frequency conversion module 50 integrates a splitter, a mixer and a filter. The mixer and the filter are connected to the splitter, and the splitter is connected to the input port. The splitter is used to divide the RF signals of different polarizations input from the same feeder 60 into multiple paths. The RF signal in each path is processed by a mixer or a filter, and the processed signal is transmitted to the high-frequency oscillator 20 or the low-frequency oscillator 30. Among them, the feeder 60 is a coaxial cable, and the splitter is used to distribute the input signal to obtain two signal transmission paths, one of which is transmitted to the mixer and the other is transmitted to the filter. The mixer is used to synthesize different signals to obtain a new frequency combination, and the filter is used to select or suppress a specific frequency range in the mixer output signal, so that the passive frequency conversion module 50 can realize the separation of the two frequencies and the frequency recovery of the frequency conversion signal through the internal integrated components. The passive frequency conversion module 50 has an input port, and the input port is connected to the high and low frequency signals through the feeder 60. The high and low frequency signals are processed by the passive frequency conversion module 50 to realize the corresponding high frequency vibrator 20 radiation and low frequency vibrator 30 radiation, and the passive frequency conversion module 50 can make the signal of the frequency shift channel and the signal of the non-frequency shift channel synthesize into one signal, so that the antenna in this embodiment is a single-port input, thereby solving the construction difficulty of transforming a single-channel DAS system into a dual-channel DAS system. That is, when transforming a single-channel DAS system, the present embodiment can directly select the original feeder 60 to realize the transformation of the dual-channel DAS, thereby reducing the transformation cost.

[0038] It can be understood that the solution of this embodiment can reduce the number of antenna input ports. When a single-channel DAS system is converted to a dual-channel system, there is no need to add an additional signal transmission path, that is, there is no need to build a new feeder 60, power divider, coupler, antenna and other devices. It can be applied to the passive frequency conversion transformation of a single-channel DAS to achieve the transformation of a single-stream signal to a dual-stream signal in a deployed indoor distributed system, thereby achieving the goal of improving rate performance. The passive frequency conversion module 50 is fed by the connected cable and does not require an external DC voltage supply to work normally, realizing a single-port input. The vibrator is a dual-polarized vibrator, so that the antenna of this embodiment has the function of dual-polarized radiation output of the new wireless communication standard (abbreviated as 5G NR) in the fifth generation mobile communication technology, which greatly reduces the energy consumption of the system.

[0039] Specifically, the passive frequency conversion module 50 is internally integrated with a splitter, a mixer and a filter. The splitter and the filter are used to separate the input frequency, and the mixer can combine two or more input frequency signals to generate a new frequency combination. Figure 2As shown, the passive frequency conversion module 50 can output two signal channels, namely, a frequency-shifted channel signal and a non-frequency-shifted channel signal. The connected frequency signal has three groups of frequency signals, fa, fb, and fc. The three groups of frequency signals are separated into separate fa, fb, and fc frequency signals after passing through a filter and a splitter. Among them, fc is a non-frequency-shifted channel, and the two groups of frequency signals fa and fb are mixed by a mixer and output as a frequency-shifted channel.

[0040] Continue as Figure 2 As shown, it can be understood that the frequency-shift channel realizes the frequency conversion function through a passive mixer, and the mixer will naturally bring additional system losses; the non-frequency-shift channel does not need to realize the frequency conversion function, but only transmits the signal, so there is no additional system loss in the non-frequency-shift channel. Therefore, after the signal passes through the passive frequency conversion module 50, there will be a large difference in the signal power output by the frequency-shift channel and the non-frequency-shift channel. Therefore, the inherent two-way unbalanced characteristic of the passive frequency conversion module 50 will cause the signal power of the two transmission channels in the distribution system to be extremely unbalanced. When the RSRP coverage level difference of the two-way signal is large, it will greatly affect the dual-stream signal effect and user experience. To solve this problem, it is necessary to improve the oscillator gain of the frequency-shift channel on the basis of maintaining the performance of the existing indoor antenna and ensuring that the coverage radius of the wireless network does not shrink, to make up for the signal level difference between the frequency-shift channel and the non-frequency-shift channel, and ensure the stability of the rate performance of the dual-stream signal.

[0041] Furthermore, if Figure 3 As shown in the figure, the wall is equipped with a wall-mounted antenna, which is usually mounted on the wall. The maximum radiation direction of the vertical plane pattern of the antenna is perpendicular to the wall and parallel to the ground. The radiation pattern of the antenna is a semi-ellipsoidal sphere, and its gain reaches the strongest in the maximum radiation direction. As the angle in the up and down and left and right directions increases, the gain gradually decreases. Mobile users are all active on the ground. The part of the antenna pattern facing the ground is effective coverage, while the part facing the ceiling is invalid coverage. Therefore, when the relevant wall-mounted antenna is mounted on the wall, there is about half of the invalid coverage area, resulting in a waste of radiation energy.

[0042] In order to solve the problem of ineffective coverage area of ​​the above-mentioned wall-mounted antenna and the power difference problem between the bottle shifting channel and the non-frequency shifting channel, the utility model provides an embodiment, the passive frequency-converting wall-mounted antenna also includes an adjustment baffle 40, the adjustment baffle 40 is arranged between the high-frequency vibrator 20 and the low-frequency vibrator 30, and the adjustment baffle 40 is used to adjust the radiation direction of the high-frequency vibrator 20 so that the radiation direction of the high-frequency vibrator 20 is tilted downward. Figure 3 As shown, in this embodiment, a baffle 40 for adjusting the vertical plane pattern is added inside the antenna to make the pattern tilt downward by a certain angle, such as Figure 3As shown by the middle dotted line, while keeping the coverage area from shrinking, the area of ​​invalid coverage of the directional pattern can also be reduced, thereby improving the coverage of the effective area.

[0043] When specifically set, the baffle plate 40 is set perpendicular to the reflector 10, and the extension height of the baffle plate 40 in the vertical direction is located between the planes where the high-frequency vibrator 20 and the low-frequency vibrator 30 are located. In a specific 5G application scenario, the high-frequency vibrator 20 is used for high-speed signal transmission, and the height of the baffle plate 40 is set at a position higher than the high-frequency vibrator 20 and lower than the low-frequency vibrator 30. This allows the signal of the high-frequency vibrator 20 to tilt downward when the vibrator radiates a signal, which can effectively reduce the area of ​​the invalid coverage area of ​​the directional pattern.

[0044] It is understandable that the height of the adjustment baffle 40 can affect the radiation angle of the high-frequency oscillator 20. In this embodiment, the adjustment baffle 40 needs to be slightly higher than or the same height as the high-frequency oscillator 20 to achieve the adjustment of the radiation direction of the high-frequency oscillator 20. Of course, for the specific height setting of the adjustment baffle 40, the high-frequency directional pattern wave width and downtilt angle and other parameters can be balanced according to design requirements to adapt to the balance of various parameter indicators. Among them, the height of the adjustment baffle 40 cannot exceed the height of the position of the low-frequency oscillator 30, because once the height of the adjustment baffle 40 is too high, it will directly affect the radiation direction of the low-frequency oscillator 30 if it exceeds the low-frequency oscillator 30.

[0045] In some examples, one of the high frequency oscillator 20 and the low frequency oscillator 30 is a single polarized oscillator, and the other of the high frequency oscillator 20 and the low frequency oscillator 30 is a dual polarized oscillator. That is, the passive frequency conversion wall-mounted antenna in this embodiment has both a single polarized oscillator and a dual polarized oscillator. The dual polarized oscillator can be used to achieve dual polarized radiation output. The single polarized oscillator can increase the signal coverage range of the antenna and achieve coverage of a wider range of frequency signals.

[0046] In the specific configuration, the low-frequency oscillator 30 is a single-polarized oscillator, and the high-frequency oscillator 20 is a dual-polarized oscillator. The high-frequency oscillator 20 is used for radiating high-frequency signals such as 5G.

[0047] Specifically, the high-frequency oscillator 20 has a frequency-shifted polarization and a non-frequency-shifted polarization.

[0048] In some specific embodiments, continue as Figure 1 As shown, the low-frequency oscillator 30 is a single-polarized flat oscillator that radiates non-frequency-shifted channel signals. The high-frequency oscillator 20 is a ±45° dual-polarized dipole oscillator that radiates non-frequency-shifted channel signals at -45° polarization and radiates frequency-shifted channel signals at +45°. The two oscillators are fixed side by side on the metal reflector 10, fed by coaxial cables, and connected to the corresponding ports of the passive frequency conversion module 50 respectively.

[0049] The low-frequency vibrator 30 is supported by four plastic support columns, and an installation space is formed below the four plastic support columns. The passive frequency conversion module 50 is installed in the installation space, so that the passive frequency conversion module 50 is located below the low-frequency vibrator 30. The antenna port output RF cable is connected to the total input port of the passive frequency conversion module 50, and after frequency conversion and distribution by the passive frequency conversion module 50, it is input to the corresponding vibrator port for radiation. Therefore, when the antenna is input at one port, it is processed and shunted by the passive frequency conversion module 50, realizing the function of dual-polarized radiation.

[0050] It is understandable that, due to the large power difference between the frequency-shift channel and the non-frequency-shift channel in the passive frequency conversion module 50, the gain of the frequency-shift channel and the non-frequency-shift channel should be differentiated for balance. In this embodiment, a metal baffle is introduced between the low-frequency vibrator 30 and the high-frequency vibrator 20. On the one hand, it can effectively adjust the downtilt angle of the high-frequency vertical directional diagram, ensure that the coverage distance remains unchanged, and press the upward radiation energy to the ground as much as possible, thereby enhancing the signal strength of the coverage area and improving the coverage performance. On the other hand, the metal baffle can increase the gain of the polarization of the frequency-shift channel of the high-frequency vibrator 20 and reduce the gain of the polarization of the non-frequency-shift channel, thereby meeting the requirements of differentiated gain of the two-channel antenna of the passive frequency conversion system and achieving a balance between the frequency-shift channel and the non-frequency-shift channel.

[0051] In the above embodiment, the passive frequency conversion module 50 also has a first connection port, a second connection port and a third connection port. The first connection port is connected to the low-frequency oscillator 30 , and the second connection port and the third connection port are both connected to the frequency-shifting polarization of the high-frequency oscillator 20 .

[0052] In this embodiment, the passive frequency conversion module 50 is arranged below the low-frequency vibrator 30 unit, making full use of the space below the low-frequency vibrator 30, and achieving the purpose of not increasing the size of the antenna. At the same time, the passive frequency conversion module 50 is below the low-frequency vibrator 30, and has no effect on the directional performance of the low-frequency vibrator 30, nor on the standing wave of the low-frequency vibrator 30. The input port of the passive frequency conversion module 50 is connected to the input port cable of the antenna, the first connection port is a non-frequency shift channel port of the low-frequency band, and the frequency shift channel port (low-frequency band) is connected to the low-frequency vibrator 30, the second connection port is a frequency shift channel port, and the frequency shift channel port is connected to the frequency shift polarization of the high-frequency vibrator 20, and the third connection port is a non-frequency shift channel port of the high-frequency band, and the non-frequency shift channel (high-frequency band) port is connected to the non-frequency shift polarization of the high-frequency vibrator 20.

[0053] In a specific example, the specific implementation form of each antenna element unit can adopt a PCB structure, a sheet metal structure, a die-casting structure, plastic electroplating, etc. Various implementation forms can well realize the above-mentioned electrical and structural characteristics.

[0054] The utility model also provides an indoor dual-path distributed antenna system, which specifically comprises a variable frequency signal source host (RRU) and a passive variable frequency wall-mounted antenna provided by any one of the above embodiments and communicatively connected to the variable frequency signal source host.

[0055] Among them, the frequency conversion signal source host can output two signals of different frequencies, namely, one is the original frequency signal and the other is the frequency conversion signal. The two signals are transmitted simultaneously in the single feeder 60 and the passive device. At the remote end, the original single-polarized room antenna is replaced by the passive frequency conversion wall-mounted antenna provided by any of the above embodiments by the frequency conversion room antenna, and the signal is restored to two signals of the same frequency and transmitted, thereby achieving the coverage effect and service rate of the dual-stream signal.

[0056] Through the description of the above implementation methods, those skilled in the art can clearly understand that in each implementation method, through the setting of the passive frequency conversion module 50, the built-in frequency shift module of the passive frequency conversion wall-mounted antenna has a passive characteristic and does not require an external DC voltage supply to work normally, and finally realizes the function of single cable input and dual-polarized radiation output, so that under lower system energy consumption conditions, the antenna single cable input can still achieve indoor 5G NR passive MIMO coverage. Furthermore, by introducing a metal baffle between the low-frequency vibrator 30 and the high-frequency vibrator 20, the downward tilt adjustment function of the antenna vertical plane pattern is realized, which has the characteristic of improving antenna coverage. Furthermore, by introducing a metal baffle between the low-frequency vibrator 30 and the high-frequency vibrator 20, the polarization gain of the frequency shift channel is improved. This architecture can achieve the gain differentiation requirements of the frequency shift channel and the non-frequency shift channel of the passive frequency conversion system.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A passive frequency conversion wall-mounted antenna, characterized in that: include: Reflective panels; A high frequency vibrator is arranged on the reflecting plate; A low-frequency vibrator is arranged on the reflection plate and arranged side by side with the high-frequency vibrator; A passive frequency conversion module, having an input port connected to a feeder, the input port being capable of inputting radio frequency signals of different polarizations through the feeder, the passive frequency conversion module being used for frequency conversion and distribution of the input radio frequency signals; The high-frequency oscillator and the low-frequency oscillator are both communicatively connected with the passive frequency conversion module, so that the passive frequency conversion module can input the allocated signals into the high-frequency oscillator and the low-frequency oscillator respectively; Wherein, at least one of the high-frequency oscillator and the low-frequency oscillator is a dual-polarization oscillator.

2. The passive frequency-converting wall-mounted antenna according to claim 1, characterized in that: It also includes an adjustment baffle, which is arranged between the high-frequency vibrator and the low-frequency vibrator, and is used to adjust the radiation direction of the high-frequency vibrator so that the radiation direction of the high-frequency vibrator is tilted downward.

3. The passive frequency-converting wall-mounted antenna according to claim 2, characterized in that: The adjustment baffle is arranged perpendicular to the reflection plate, and the extension height of the adjustment baffle in the vertical direction is located between the plane where the high-frequency vibrator is located and the plane where the low-frequency vibrator is located.

4. The passive frequency-converting wall-mounted antenna according to claim 1 or 2, characterized in that: One of the high-frequency oscillator and the low-frequency oscillator is a single-polarization oscillator, and the other of the high-frequency oscillator and the low-frequency oscillator is a dual-polarization oscillator.

5. The passive frequency-converting wall-mounted antenna according to claim 4, characterized in that: The low-frequency oscillator is a single-polarization oscillator, and the high-frequency oscillator is a dual-polarization oscillator.

6. The passive frequency-converting wall-mounted antenna according to claim 1, characterized in that: The passive frequency conversion module integrates a splitter, a mixer and a filter; the mixer and the filter are both connected to the splitter, and the splitter is connected to the input port. The splitter is used to divide the radio frequency signals of different polarizations input from the same feeder into multiple paths, and the radio frequency signal in each path is processed by the mixer or the filter.

7. The passive frequency-converting wall-mounted antenna according to claim 4, characterized in that: The passive frequency conversion module also has a first connection port, a second connection port and a third connection port. The first connection port is connected to the low-frequency vibrator, and the second connection port and the third connection port are both connected to the high-frequency vibrator.

8. The passive frequency-converting wall-mounted antenna according to claim 1 or 2, characterized in that: The low-frequency vibrator is connected to the reflection plate through a supporting column, so that the low-frequency vibrator is higher than the high-frequency vibrator, and an installation space is formed below the low-frequency vibrator.

9. The passive frequency-converting wall-mounted antenna according to claim 8, characterized in that: The passive frequency conversion module is arranged in the installation space.

10. An indoor two-way distributed antenna system, characterized in that: It comprises a frequency conversion information source host and a passive frequency conversion wall-mounted antenna as described in any one of claims 1 to 9 which is communicatively connected to the frequency conversion information source host.

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