Filter antenna and base station

Abstract

This application relates to a filtered antenna, comprising: an antenna element, a power divider circuit, a low-pass filter unit, and a frequency divider; wherein the antenna element is connected to the power divider circuit, the power divider circuit is connected to the frequency divider, the frequency divider is connected to a signal transceiver circuit, and the low-pass filter unit is integrated into any one of the power divider circuit, the antenna element, the frequency divider, and the signal transceiver circuit, or the low-pass filter unit is located at any position between the antenna element and the signal transceiver circuit; the antenna element is used to receive wideband signals; the power divider circuit is used to perform amplitude and phase distribution on the antenna element; the frequency divider includes at least a first dielectric filter and a second dielectric filter, the first dielectric filter is used to separate a first frequency band signal from the wideband signal, and the second dielectric filter is used to separate a second frequency band signal from the wideband signal; the low-pass filter unit is used to suppress frequency band signals greater than a target frequency band, the target frequency band including at least the first frequency band and the second frequency band.

Description

Technical Field

[0001] This application relates to the field of wireless communication technology, and in particular to a filter antenna and a base station. Background Technology

[0002] With the current development of 5G (5th Generation Mobile Communication Technology), massive MIMO antennas are widely used. For dual-band massive MIMO antennas, such as... Figure 1 As shown, the related technology places two independent large-scale array antennas one above the other. Each large-scale array antenna supports one communication frequency band. The two large-scale array antennas are connected to a power divider circuit respectively. The antenna ports of different frequency bands are connected to the corresponding frequency band filters through RF connectors. In this way, a dual-band antenna is formed and the filtering function is realized.

[0003] However, the inventors discovered the following problems with the related technology: the related technology uses two independent large-scale array antennas to form a dual-band antenna, which results in a large antenna end size and weight. Summary of the Invention

[0004] The main objective of this application is to provide a filter antenna and base station that can reduce antenna size and weight.

[0005] To achieve the above objectives, this application provides a filter antenna connected to a signal transceiver circuit. The filter antenna includes: an antenna element, a power divider circuit, a low-pass filter unit, and a frequency divider.

[0006] The antenna unit is connected to the power divider circuit, the power divider circuit is connected to the frequency divider, the frequency divider is connected to the signal transceiver circuit, and the low-pass filter unit is integrated into any one of the power divider circuit, the antenna unit, the frequency divider, and the signal transceiver circuit, or the low-pass filter unit is located at any position between the antenna unit and the signal transceiver circuit.

[0007] The antenna unit is used to receive wideband signals;

[0008] The power divider circuit is used to allocate the amplitude and phase of the antenna element;

[0009] The frequency divider includes at least a first dielectric filter and a second dielectric filter, wherein the first dielectric filter is used to separate a first frequency band signal from the wideband signal, and the second dielectric filter is used to separate a second frequency band signal from the wideband signal;

[0010] The low-pass filter unit is used to suppress frequency band signals that are greater than the target frequency band, and the target frequency band includes at least the first frequency band and the second frequency band.

[0011] To achieve the above objectives, embodiments of this application provide a base station, which includes the aforementioned filter antenna.

[0012] In embodiments of the present invention, a wideband signal is received via an antenna unit. The antenna unit is connected to a power divider circuit, which is connected to a frequency divider. The frequency divider includes at least a first dielectric filter and a second dielectric filter, which separates the wideband signal into at least a first frequency band and a second frequency band. This allows for the acquisition of at least two frequency bands without the need for two large-scale array antennas, reducing the size and weight of the filtering antenna. Furthermore, the frequency divider not only performs frequency division but also filtering. The wideband signal, after being divided and filtered by the frequency divider, can attenuate most of the unwanted frequency components. A low-pass filter unit is added to the filtering antenna to suppress signals greater than the first and second frequency bands, improving the high-frequency suppression capability of the entire antenna. Integrating the frequency divider at the antenna end increases the antenna's integration density, enabling the filtering antenna to perform both frequency division and filtering. In addition, the dielectric filter is small in size, low in cost, and light in weight, further reducing the size and weight of the filtering antenna and lowering its cost. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of a dual-frequency system in related technologies;

[0014] Figure 2 This is a schematic diagram of another dual-frequency system in related technologies;

[0015] Figure 3 This is a schematic diagram of the structure of the filter antenna according to the first embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the structure of the filter antenna according to the second embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram of the structure of a filter antenna according to a third embodiment of the present invention. Detailed Implementation

[0018] The terms "first" and "second" used in the embodiments of this application are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion. For example, a system, product, or device that includes a series of components or units is not limited to the listed components or units, but may optionally include unlisted components or units, or may optionally include other components or units inherent to such products or devices. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0019] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the various embodiments of this application will be described in detail below with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the various embodiments of this application to help readers better understand this application. However, the technical solutions claimed in this application can be implemented even without these technical details and various changes and modifications based on the following embodiments. The division of the various embodiments below is for the convenience of description and should not constitute any limitation on the specific implementation of this application. The various embodiments can be combined with and referenced by each other without contradiction.

[0021] With the current development of 5G (5th Generation Mobile Communication Technology), massive MIMO antennas are widely used. Filters and antennas, as key passive components in the front end of wireless communication systems, respectively transmit and receive electromagnetic signals and filter them. Their performance determines the overall system performance. Generally, filters and antennas are independently implemented using different technologies to meet their respective performance requirements. This independent design often leads to matching issues between the antenna and filter, requiring additional matching circuitry, increasing the overall system size and consuming extra resources. Integrating the antenna and filter design can reduce the size of passive circuitry while maintaining overall performance, aligning with the trend towards miniaturization and integration.

[0022] Traditional massive MIMO antennas are mostly single-band antennas, meaning each antenna supports only one communication frequency band, such as 2.6 GHz or 3.5 GHz. The antenna itself does not have a filter; the filter is integrated into the front end of the AAU (Active Antenna Unit) signal transceiver circuitry. One port of the filter needs to be connected to the AAU signal transceiver circuitry using an RF connector, and the other port needs to be connected to the antenna port using an RF connector. For example, a 32-channel massive MIMO antenna requires at least 2 × 32 + 1 RF connectors. For dual-band massive MIMO antennas, there are two common implementation methods. For example... Figure 1 The dual-band massive MIMO antenna shown consists of two independent massive MIMO antennas placed vertically to form a dual-band antenna. It requires two large massive MIMO antennas. The two vertically placed massive MIMO antennas 1b each need to be connected to their respective power divider circuits 2b. The antenna ends are connected to the front end of the AAU signal transceiver circuit 6 via RF connectors 4. The two filters 5 are independent components installed at the front end of the signal transceiver circuit. This antenna has many components, complex assembly, and low integration. Figure 2 As shown, two frequency bands are separated at the antenna end using a wideband antenna 1a and an antenna-built-in frequency divider 3. The antenna ports of different frequency bands are connected to corresponding frequency band filters 5 via RF connectors 4. The filters are connected to the signal transceiver circuit. The filters in this dual-band system need to process the unfiltered signal; therefore, the filters in this dual-band system need to be able to handle many frequency components, and the filtering requirements are high. Such filters are generally independent filters, and their size is relatively large, making them difficult to integrate at the antenna end. Figure 2 The method shown increases signal transmission loss, requires more components, is more complex to assemble, and has low integration.

[0023] Therefore, in order to solve the problems of numerous components, complex assembly, and high losses in large-scale array antennas, and to achieve the goal of miniaturization and weight reduction of large-scale array antennas, the first embodiment of this invention proposes a filter antenna.

[0024] Example 1 uses a dual-band filtering antenna, where the frequency divider includes a first filter and a second filter, as an example. A schematic diagram of the filtering antenna structure in Example 1 is shown below. Figure 3 As shown.

[0025] In this embodiment, the filtering antenna and the signal transceiver circuit are connected via an RF connector. The filtering antenna includes: an antenna unit 11, a power divider circuit 12, a low-pass filter unit 13, and a frequency divider 14. The antenna unit is connected to the power divider circuit, the power divider circuit is connected to the frequency divider, and the frequency divider is connected to the signal transceiver circuit. The low-pass filter unit is integrated into any one of the power divider circuit, the antenna unit, the frequency divider, and the signal transceiver circuit, or the low-pass filter unit is located at any position between the antenna unit and the signal transceiver circuit. The antenna unit is used to receive wideband signals. The power divider circuit is used to allocate amplitude and phase of the antenna unit. The frequency divider includes at least a first dielectric filter and a second dielectric filter. The first dielectric filter is used to separate a first frequency band signal from the wideband signal, and the second dielectric filter is used to separate a second frequency band signal from the wideband signal. The low-pass filter unit is used to suppress frequency band signals greater than a target frequency band, where the target frequency band includes at least the first frequency band and the second frequency band.

[0026] In one example, the filtered antenna of this embodiment receives a wideband signal from antenna element 11, which is transmitted to a low-pass filter 13 through a power divider circuit 12. The signal is then divided into a first frequency band signal and a second frequency band signal by a frequency divider 14. These two signals are connected to the corresponding frequency band signal transceiver circuits through an RF connector 15.

[0027] Antenna unit 11 is connected to power divider circuit 12, power divider circuit 12 is connected to low-pass filter 13, low-pass filter is connected to frequency divider through splitter endpoint t3, splitter endpoint divides signal path into two paths, one path is the path where first endpoint t1 and splitter endpoint t3 are located, first dielectric filter is connected between first endpoint t2 and splitter endpoint to enable the transmission of first frequency band signal between first endpoint t1 and splitter endpoint t3 and block second frequency band signal; the other path is the path where second endpoint t2 and splitter endpoint t3 are located, second dielectric filter is connected between second endpoint and splitter endpoint to enable the transmission of first frequency band signal between first endpoint t1 and splitter endpoint t3 and block second frequency band signal. These two signal paths are connected to signal transceiver circuits of corresponding frequency bands through RF connector 15.

[0028] In one example, antenna element 11 is a wideband element, meaning it can receive wideband signals. Wideband signals are a concept relative to narrowband signals, which refer to signals that only include one frequency band, while wideband signals include multiple frequency bands. In other words, the operating bandwidth of the antenna element must include at least two frequency bands, such as 2500MHz–2690MHz and 3300MHz–3800MHz. Antenna element 11 is connected to power divider circuit 12.

[0029] In one example, the power divider circuit 12 includes components such as a power divider and a phase shifter. Its function is to distribute signals to the antenna elements according to different amplitudes and phases, or to combine multiple signals from the antenna elements into a single signal.

[0030] It should be noted that LC filters are widely used in mobile phones and other terminal devices due to their low cost, simple structure, and high reliability. However, they suffer from low power capacity, poor filtering suppression, and difficulty in controlling parasitic coupling. Metal cavity filters are widely used in base station communication equipment, offering low insertion loss, good filtering suppression, and high reliability. However, they are bulky, heavy, and expensive. Dielectric filters are a relatively new technology that has emerged in recent years, characterized by small size, low cost, light weight, good filtering suppression, and ease of surface mounting. However, the high-order modes of dielectric filters result in poor high-frequency suppression. This invention uses a dielectric filter, reducing the size and weight of the filtered antenna and lowering costs.

[0031] To compensate for the poor suppression caused by the high-order modes of the dielectric filter, this embodiment of the invention uses a low-pass filter 13. The low-pass filter is a structure with low-pass filtering function, which suppresses signals with frequencies higher than the operating frequency band of the antenna element 11, thereby improving the high-frequency suppression capability of the entire system. In this embodiment, the signal passes through a frequency divider, which has a filtering function and can filter out most frequency components that do not meet the frequency requirements of the signal. Therefore, only a low-pass filter needs to be added to suppress high-frequency signals, i.e., signals higher than the operating frequency band of the antenna element, thus improving the high-frequency suppression capability of the antenna and meeting the signal requirements. Compared to related technologies, which require a filter that can attenuate a large number of signal frequencies after the frequency divider to meet actual needs, and whose filter structures are more complex and difficult to integrate, the low-pass filter structure of this embodiment is simpler and easier to integrate into the antenna.

[0032] It should be noted that the low-pass filter is just an example, and it can be used for any structure with low-pass filtering functionality; there are no restrictions here.

[0033] Optionally, low-pass filtering units, such as low-pass filters, can also be integrated into the power divider circuit to improve the integration of the filter antenna.

[0034] Optionally, the branch endpoints are integrated into the low-pass filter unit, such as a low-pass filter, which is located between the power divider circuit and the frequency divider.

[0035] The filter antenna in this embodiment integrates both filtering and frequency division functions at the antenna end, greatly improving the integration level.

[0036] It should be noted that the filtering antenna proposed in this embodiment may also include multiple dielectric filters, which can separate multiple frequency band signals from the wideband signal to realize a multi-frequency filtering antenna.

[0037] This embodiment receives broadband signals through an antenna unit. The antenna unit is connected to a power divider circuit, which in turn is connected to a frequency divider. The frequency divider includes a first dielectric filter and a second dielectric filter, which separates the broadband signal into a first frequency band signal and a second frequency band signal. This allows for the acquisition of signals from two frequency bands without the need for two large-scale array antennas, reducing the size and weight of the filtering antenna. Furthermore, the frequency divider has both filtering and frequency division functions, which, when integrated into the antenna, improves the antenna's integration. This allows the filtering antenna to perform both frequency division and filtering. In addition, the dielectric filter is small, low-cost, and lightweight, further reducing the size and weight of the filtering antenna and lowering its cost. The addition of a low-pass filter unit to the filtering antenna improves the overall high-frequency suppression capability of the antenna.

[0038] The second embodiment of the present invention relates to a filter antenna. The main difference between this embodiment and the first embodiment is that the low-pass filter unit of this embodiment includes a first low-pass filter and a second low-pass filter. The first low-pass filter is located between the branch endpoint t3 and the first dielectric filter; the second low-pass filter is located between the branch endpoint t3 and the second dielectric filter.

[0039] The filter antenna in this embodiment is as follows: Figure 4 As shown.

[0040] In Embodiment 2, the filtering antenna and signal transceiver circuit are connected via an RF connector. The filtering antenna includes: an antenna element 11, a power divider circuit 12, a low-pass filter unit 13, and a frequency divider 14. The antenna element is connected to the power divider circuit, the power divider circuit is connected to the frequency divider, and the frequency divider is connected to the signal transceiver circuit. The low-pass filter unit includes a first low-pass filter and a second low-pass filter. The first low-pass filter is located between the splitter endpoint and the first dielectric filter; the second low-pass filter is located between the splitter endpoint and the second dielectric filter. The antenna element is used to receive wideband signals. The power divider circuit is used to distribute the amplitude and phase of the antenna element. The frequency divider includes at least a first dielectric filter and a second dielectric filter. The first dielectric filter is used to separate a first frequency band signal from the wideband signal, and the second dielectric filter is used to separate a second frequency band signal from the wideband signal. The low-pass filter unit is used to suppress frequency band signals greater than a target frequency band, where the target frequency band includes at least the first and second frequency bands.

[0041] In one example, antenna unit 11 is connected to power divider circuit 12. Power divider circuit 12 is connected to low-pass filter unit 13 through a splitter endpoint. The splitter endpoint divides the broadband signal into two paths, and the two paths are transmitted to the first dielectric filter and the second dielectric filter, respectively. Figure 4 The branch endpoints shown divide the signal path into two paths. One path is the path containing the first endpoint t1 and the branch endpoint t3, with a first dielectric filter connected between the first endpoint t2 and the branch endpoint, and a first low-pass filter located between the first dielectric filter and the branch endpoint. The other path is the path containing the second endpoint t2 and the branch endpoint t3, with a second dielectric filter connected between the second endpoint and the branch endpoint, and a second low-pass filter located between the second dielectric filter and the branch endpoint.

[0042] In one example, antenna element 11 is a wideband element, meaning that the operating bandwidth of the antenna element includes at least two frequency bands, such as 2500MHz~2690MHz and 3300MHz~3800MHz. Antenna element 11 is connected to power divider circuit 12.

[0043] In one example, the power divider circuit 12 includes components such as a power divider and a phase shifter, which distribute the signal to the corresponding antenna elements according to different amplitudes and phases.

[0044] In one example, the frequency divider 14 consists of two sets of dielectric filters. The first dielectric filter is connected between the first endpoint t1 and the branch endpoint t3 to allow the transmission of a first frequency band signal between them while blocking a second frequency band signal. The second dielectric filter is connected between the second endpoint t2 and the branch endpoint t3 to allow the transmission of a second frequency band signal while blocking a first frequency band signal. The frequency divider composed of the first and second dielectric filters can separate the first and second frequency band signals.

[0045] In one example, the low-pass filter unit 13 includes a first low-pass filter unit and a second low-pass filter unit, both of which are low-pass filters. The first low-pass filter unit is located between the first dielectric filter and the splitter endpoint t3, enabling the transmission of signals in the first frequency band between the first endpoint t1 and the splitter endpoint t3. Similarly, the second low-pass filter unit, i.e., the low-pass filter, is located between the second dielectric filter and the splitter endpoint t3, enabling the transmission of signals in the second frequency band between the second endpoint t2 and the splitter endpoint t3. The low-pass filter is a structure with low-pass filtering function, suppressing signals with frequencies higher than the operating frequency band of the antenna unit 11, thereby improving the high-frequency suppression capability of the entire system. In addition, when the passbands of the filters are significantly separated, the filtering antenna requires a high degree of signal isolation. Connecting low-pass filters on the two signal paths respectively can meet the signal isolation requirements of the filtering antenna.

[0046] It should be noted that the low-pass filter is just an example, and it can be used for any structure with low-pass filtering functionality; there are no restrictions here.

[0047] Compared to the first embodiment, which can be used when the passbands of the dielectric filters are not significantly different and a single low-pass filter is used to filter the transmitted signal, this embodiment can be used when the passbands of the dielectric filters are significantly different and two separate low-pass filters are used to filter the two separated frequency bands.

[0048] It is worth mentioning that the frequency divider in this embodiment of the invention includes a first dielectric filter and a second dielectric filter. The frequency divider divides a wideband signal into a first frequency band signal and a second frequency band signal, and suppresses signals larger than the first frequency band using a first low-pass filter and signals larger than the second frequency band using a second low-pass filter. When the frequency divider has multiple dielectric filters, it can divide a wideband signal into multiple frequency band signals. Correspondingly, the splitter endpoints can also divide the wideband signal path into multiple signal paths. Low-pass filters can be connected to the signal paths of the multiple frequency band signals respectively. For example, if the frequency divider divides the wideband signal into a first frequency band signal, a second frequency band signal, and a third frequency band signal using a first dielectric filter, a second dielectric filter, and a third dielectric filter respectively, then a first low-pass filter is connected to the signal path of the first frequency band signal, a second low-pass filter is connected to the signal path of the second frequency band signal, and a third low-pass filter is connected to the signal path of the third frequency band signal. When the signals in some frequency bands of the multiple frequency bands divided by the frequency divider are similar, the same low-pass filter can be used to suppress the high-frequency signals of the multiple frequency bands that are similar. For example, if the frequency divider divides a wide-band signal into a first frequency band, a second frequency band, and a third frequency band, and the first and second frequency bands are similar in frequency, a first low-pass filter can be used to suppress signals greater than the first and second frequency bands, and a second low-pass filter can be used to suppress signals greater than the third frequency band.

[0049] In the second embodiment of the present invention, low-pass filters are connected to the two signal paths split at the branch endpoints, which can meet the signal isolation requirements of the filter antenna when the passbands of the filters are significantly different. By using a dielectric filter to form a frequency divider, the effects of frequency division and filtering are achieved. The introduction of a low-pass filter improves the high-frequency suppression capability of the entire system. The low-pass filter is integrated with the branch endpoints, so that the low-pass filter has the function of a branch endpoint, further improving the integration of the entire system.

[0050] The third embodiment of the present invention is largely the same as the second embodiment, except that: the low-pass filter unit of this embodiment includes a first low-pass filter unit and a second low-pass filter unit, the first low-pass filter is located between the first dielectric filter and the signal transceiver circuit, and the second low-pass filter is located between the second dielectric filter and the signal transceiver circuit.

[0051] The filter antenna in this embodiment is as follows: Figure 5 As shown.

[0052] In Embodiment 3, the filtering antenna and the signal transceiver circuit are connected via an RF connector 15. The filtering antenna includes: an antenna element 11, a power divider circuit 12, a low-pass filter unit 13, and a frequency divider 14. The antenna element is connected to the power divider circuit, the power divider circuit is connected to the frequency divider, and the frequency divider is connected to the signal transceiver circuit. The low-pass filter unit includes a first low-pass filter and a second low-pass filter. The first low-pass filter is located between the first dielectric filter and the signal transceiver circuit, and the second low-pass filter is located between the second dielectric filter and the signal transceiver circuit. The power divider circuit is used to distribute the amplitude and phase of the antenna element. The frequency divider includes a first dielectric filter and a second dielectric filter. The first dielectric filter is used to separate a first frequency band signal from the wideband signal, and the second dielectric filter is used to separate a second frequency band signal from the wideband signal. The low-pass filter unit is used to suppress frequency band signals greater than a target frequency band, where the target frequency band includes at least the first and second frequency bands.

[0053] In one example, antenna element 11 is connected to power divider circuit 12, which is connected to frequency divider 14 through splitter endpoints. The splitter endpoints divide the signal path into two paths: one path is the path where the first endpoint t1 and the splitter endpoint t3 are located, with a first dielectric filter connected between the first endpoint t2 and the splitter endpoint, and a first low-pass filter between the first dielectric filter and the first endpoint; the other path is the path where the second endpoint t2 and the splitter endpoint t3 are located, with a second dielectric filter connected between the second endpoint and the splitter endpoint, and a second low-pass filter located between the second dielectric filter and the second endpoint.

[0054] In one example, antenna element 11 is a wideband element, meaning that the operating bandwidth of the antenna element includes at least two frequency bands, such as 2500MHz~2690MHz and 3300MHz~3800MHz. Antenna element 11 is connected to power divider circuit 12.

[0055] In one example, the power divider circuit 12 includes components such as a power divider and a phase shifter, which are used to distribute the amplitude and phase of the antenna element. The antenna element has multiple antenna sub-units, and the power divider circuit distributes the signal to different antenna sub-units according to the amplitude and phase, or combines the broadband signals received by multiple antenna sub-units into a single broadband signal.

[0056] In one example, the frequency divider 14 consists of two sets of dielectric filters. The first dielectric filter is connected between the first endpoint t1 and the branch endpoint t3 to allow the transmission of a first frequency band signal between them while blocking a second frequency band signal. The second dielectric filter is connected between the second endpoint t2 and the branch endpoint t3 to allow the transmission of a second frequency band signal while blocking a first frequency band signal. The frequency divider composed of the first and second dielectric filters can separate the first and second frequency band signals.

[0057] Optionally, the frequency divider and the power divider circuit are connected via surface mount soldering or a probe structure. The frequency divider, composed of a dielectric filter, is connected to the power divider circuit using surface mount soldering or a probe connection, integrating filtering and frequency division functions to the antenna end, improving the overall system integration. The lightweight and easily labeled nature of the dielectric filter achieves weight reduction. Furthermore, the easy labeling and compact size of the dielectric filter allow for connection to the power divider circuit via surface mount soldering or a probe structure, integrating it to the antenna end. This eliminates the need for RF connectors when connecting the dielectric filter to the power divider circuit, reducing the use of RF connectors and simplifying assembly.

[0058] It should be noted that in this embodiment, the low-pass filter unit 13 is an independent device in the filter antenna, but the position of the low-pass filter unit is not limited to this. The position of the low-pass filter unit can be changed as needed, and the low-pass filter unit can also be integrated into... Figure 3 In any component of the filter antenna shown, such as the low-pass filter, it can be integrated into the power divider circuit 12 or other components in the form of a microstrip line or stripline, which will not be elaborated on here.

[0059] This embodiment uses a dielectric filter to form a frequency divider, achieving both frequency division and filtering. A low-pass filter is also used to improve the high-frequency suppression capability of the entire system. The frequency divider composed of dielectric filters is connected to the power divider circuit using surface-mount soldering or probe connection. The filtering and frequency division functions are integrated into the antenna end, improving the overall system integration. The lightweight and easy-to-label characteristics of dielectric filters achieve weight reduction. Furthermore, the easy labeling and compact size of dielectric filters allow for integration into the antenna end, reducing the use of RF connectors and simplifying assembly.

[0060] The fourth embodiment of the present invention relates to a base station, which is equipped with the filter antenna described in the above embodiments.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filter antenna, said filter antenna being connected to a signal transceiver circuit, characterized in that, The filtered antenna includes: an antenna element, a power divider circuit, a low-pass filter unit, and a frequency divider; The antenna unit is connected to the power divider circuit, the power divider circuit is connected to the frequency divider, the frequency divider is connected to the signal transceiver circuit, and the low-pass filter unit is integrated into any one of the power divider circuit, the antenna unit, the frequency divider, and the signal transceiver circuit, or the low-pass filter unit is located at any position between the antenna unit and the signal transceiver circuit. The antenna unit is used to receive wideband signals; The power divider circuit is used to allocate the amplitude and phase of the antenna element; The frequency divider includes at least a first dielectric filter and a second dielectric filter, wherein the first dielectric filter is used to separate a first frequency band signal from the wideband signal, and the second dielectric filter is used to separate a second frequency band signal from the wideband signal; The low-pass filter unit is used to suppress frequency band signals greater than the target frequency band, and the target frequency band includes at least the first frequency band and the second frequency band; The filter antenna also includes a branching endpoint; The splitter endpoint is used to split the broadband signal into at least two paths and transmit the two paths to the first dielectric filter and the second dielectric filter, respectively.

2. The filter antenna according to claim 1, characterized in that, The low-pass filtering unit includes at least a first low-pass filter and a second low-pass filter. The first low-pass filter is used to provide suppression of signals greater than the first frequency band, and the second low-pass filter is used to provide suppression of signals greater than the second frequency band. The first low-pass filter is located between the first dielectric filter and the signal transceiver circuit, and the second low-pass filter is located between the second dielectric filter and the signal transceiver circuit.

3. The filter antenna according to claim 1, characterized in that, The low-pass filter unit is integrated into the frequency divider.

4. The filter antenna according to claim 1, characterized in that, The branch endpoint is integrated into the low-pass filter unit, which is located between the power divider circuit and the frequency divider.

5. The filter antenna according to claim 1, characterized in that, The low-pass filter unit is integrated into the power divider circuit, and the power divider circuit is connected to the branch endpoint.

6. The filter antenna according to claim 1, characterized in that, The power divider circuit is connected to the low-pass filter unit, and the low-pass filter unit is connected to the branch endpoint.

7. The filter antenna according to claim 1, characterized in that, The low-pass filtering unit includes at least a first low-pass filter and a second low-pass filter. The first low-pass filter is used to provide suppression of signals greater than the first frequency band, and the second low-pass filter is used to provide suppression of signals greater than the second frequency band. The first low-pass filter is located between the branch endpoint and the first dielectric filter; the second low-pass filter is located between the branch endpoint and the second dielectric filter.

8. A base station, characterized in that, The base station includes the filtered antenna as described in any one of claims 1 to 7.

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