CN114649670A - Filtering antenna and base station - Google Patents
Filtering antenna and base station Download PDFInfo
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- CN114649670A CN114649670A CN202011498807.4A CN202011498807A CN114649670A CN 114649670 A CN114649670 A CN 114649670A CN 202011498807 A CN202011498807 A CN 202011498807A CN 114649670 A CN114649670 A CN 114649670A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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Abstract
The application relates to a filtering antenna, comprising: the antenna comprises an antenna unit, a power dividing circuit, a low-pass filtering unit and a frequency divider; the antenna unit is connected with the power dividing circuit, the power dividing circuit is connected with the frequency divider, the frequency divider is connected with the signal transceiving circuit, the low-pass filtering unit is integrated in any one of the power dividing circuit, the antenna unit, the frequency divider and the signal transceiving circuit, or the low-pass filtering unit is positioned at any position between the antenna unit and the signal transceiving circuit; the antenna unit is used for receiving the wide-band signal; the power dividing circuit is used for distributing amplitude and phase of the antenna unit; the frequency divider at least comprises a first dielectric filter and a second dielectric filter, wherein the first dielectric filter is used for separating signals of a first frequency band from the signals of the wide frequency band, and the second dielectric filter is used for separating signals of a second frequency band from the signals of the wide frequency band; the low-pass filtering unit is used for suppressing frequency band signals larger than a target frequency band, and the target frequency band at least comprises a first frequency band and a second frequency band.
Description
Technical Field
The embodiment of the application relates to the technical field of wireless communication, in particular to a filtering antenna and a base station.
Background
With the development of the 5G (the 5th Generation Mobile Communication Technology) Mobile Communication Technology, large-scale array antennas are widely used. For a dual-frequency large-scale array antenna, as shown in fig. 1, in the related art, two independent large-scale array antennas are placed up and down, each large-scale array antenna supports one communication frequency band, the two large-scale array antennas are respectively connected with a power dividing circuit, and antenna ports of different frequency bands are connected with filters of corresponding frequency bands through radio frequency connectors, so that a dual-frequency antenna is formed and a filtering function is realized.
However, the inventors found that the related art has the following problems: in the related technology, the dual-frequency antenna is formed by placing two independent large-scale array antennas, and the antenna end is large in size and heavy in weight.
Disclosure of Invention
The embodiment of the application mainly aims to provide a filtering antenna and a base station, which can reduce the volume and weight of the antenna.
In order to achieve the above object, an embodiment of the present application provides a filtering antenna, where the filtering antenna is connected to a signal transceiving circuit, and the filtering antenna includes: the antenna comprises an antenna unit, a power dividing circuit, a low-pass filtering unit and a frequency divider;
the antenna unit is connected to the power dividing circuit, the power dividing circuit is connected to the frequency divider, the frequency divider is connected to the signal transceiver circuit, and the low-pass filtering unit is integrated with any one of the power dividing circuit, the antenna unit, the frequency divider, and the signal transceiver circuit, or the low-pass filtering unit is located at any position between the antenna unit and the signal transceiver circuit;
the antenna unit is used for receiving wide-band signals;
the power dividing circuit is used for distributing amplitude and phase of the antenna unit;
the frequency divider at least comprises a first dielectric filter and a second dielectric filter, wherein the first dielectric filter is used for separating signals of a first frequency band from the wide frequency band signals, and the second dielectric filter is used for separating signals of a second frequency band from the wide frequency band signals;
the low-pass filtering unit is used for suppressing frequency band signals larger than a target frequency band, and the target frequency band at least comprises the first frequency band and the second frequency band.
In order to achieve the above object, an embodiment of the present application provides a base station, where the base station includes the above filtering antenna.
The embodiment of the invention receives the broadband signal through the antenna unit, the antenna unit is connected with the power dividing circuit, the power dividing circuit is connected with the frequency divider, the frequency divider at least comprises a first dielectric filter and a second dielectric filter, and the broadband signal is at least divided into a signal of a first frequency band and a signal of a second frequency band, so that the signals of the two frequency bands can be at least obtained without two large-scale array antennas, the size and the weight of the filter antenna are reduced, the frequency divider not only can divide the frequency but also has a filtering function, the broadband signal can attenuate most of unnecessary frequency components by frequency division filtering of the frequency divider, a low-pass filtering unit is added into the filter antenna to suppress the signals of the frequency bands larger than the first frequency band and the second frequency band, the high-frequency suppression capability of the whole antenna is improved, the frequency divider is integrated at the antenna end, and the integration degree of the antenna is improved, the filter antenna can be used for frequency division and filtering, and in addition, the dielectric filter is small in size, low in cost and light in weight, so that the size and the weight of the filter antenna are further reduced, and the cost of the filter antenna is reduced.
Drawings
Fig. 1 is a schematic diagram of a dual frequency system in the related art;
fig. 2 is a schematic diagram of another dual-band system in the related art;
fig. 3 is a schematic structural diagram of a filtering antenna according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a filtering antenna according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a filtering antenna according to a third embodiment of the present invention.
Detailed Description
The terms "first" and "second" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "comprise" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a system, product or apparatus that comprises a list of elements or components is not limited to only those elements or components but may alternatively include other elements or components not expressly listed or inherent to such product or apparatus. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
To make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that in the examples of the present application, numerous technical details are set forth in order to provide a better understanding of the present application. However, the technical solution claimed in the present application can be implemented without these technical details and various changes and modifications based on the following embodiments. The following embodiments are divided for convenience of description, and should not constitute any limitation to the specific implementation manner of the present application, and the embodiments may be mutually incorporated and referred to without contradiction.
With the development of the 5G (the 5th Generation Mobile Communication Technology) Mobile Communication Technology, large-scale array antennas are widely used. The filter and the antenna are used as key passive devices at the front end of the wireless communication system, and can respectively realize the transmitting and receiving of electromagnetic signals and the filtering action, the two are widely applied to the wireless communication system, the quality of the performance of the whole system is determined by the quality of the performance of the two, generally, the filter and the antenna are independently completed by adopting different technologies to meet the performance indexes required by the filter, and due to the independent design, the matching problem usually exists between the antenna and the filter, and a matching circuit is required to be additionally added to solve the problem, so that the size of the whole system is increased, and additional resources are occupied. The antenna and the filter are integrated, the size of a passive circuit is reduced while the overall performance is ensured, and the development trend of miniaturization and integration is met.
Conventional large-scale array antennas are mostly single-band antennas, that is, one antenna only supports one communication band, such as 2.6G or 3.5G. The Antenna itself has no filter, the filter is integrated into the front end of an AAU (Active Antenna Unit) signal transceiver circuit, one port of the filter needs to be connected with the AAU signal transceiver circuit by using a radio frequency connector, and the other port needs to be connected with an Antenna port by using a radio frequency connector, for example, at least 2 × 32+1 radio frequency connectors are needed in a 32-channel large-scale array Antenna. For a dual-frequency large-scale array antenna, there are two conventional implementations. As shown in fig. 1, two independent large-scale array antennas are vertically arranged to form a dual-frequency antenna, two large-scale array antennas are required, the size is large, two large-scale antennas 1b vertically arranged need to be respectively connected with respective power dividing circuits 2b, an antenna end is connected with the front end of an AAU signal transceiver circuit 6 through a radio frequency connector 4, two filters 5 are independent components and are installed at the front end of the signal transceiver circuit, and the dual-frequency large-scale array antenna has multiple antenna accessories, complex assembly and low integration level. As shown in fig. 2, the two frequency bands are separated at the antenna end by the way of the broadband antenna 1a and the built-in frequency divider 3 of the antenna, the antenna ports of different frequency bands are connected with the filters 5 of corresponding frequency bands by the radio frequency connector 4, the filters are connected with the signal transceiving circuit, and the filters of the dual-frequency system need to process signals which are not processed and filtered, so that the filters of the dual-frequency system need to process a plurality of frequency components, the filtering requirements of the filters are high, such filters are generally independent filters, and the size is large and difficult to integrate at the antenna end.
Therefore, the problems of multiple parts, complex assembly and high loss of the large-scale array antenna are solved, and the purposes of miniaturization and light weight of the large-scale array antenna are achieved. A first embodiment of the present invention provides a filtering antenna.
In the first embodiment, a dual-band filtering antenna is taken as an example, that is, a frequency divider includes a first filter and a second filter, and a schematic structural diagram of the filtering antenna of the first embodiment is shown in fig. 3.
The filtering antenna of this embodiment is connected through the radio frequency connector with signal transceiver circuit, and the filtering antenna includes: an antenna unit 11, a power dividing circuit 12, a low-pass filtering unit 13, and a frequency divider 14; the antenna unit is connected with the power dividing circuit, the power dividing circuit is connected with the frequency divider, the frequency divider is connected with the signal transceiving circuit, the low-pass filtering unit is integrated in any one of the power dividing circuit, the antenna unit, the frequency divider and the signal transceiving circuit, or the low-pass filtering unit is located at any position between the antenna unit and the signal transceiving circuit; the antenna unit is used for receiving wide-band signals; the power dividing circuit is used for distributing amplitude and phase of the antenna unit; the frequency divider at least comprises a first dielectric filter and a second dielectric filter, wherein the first dielectric filter is used for separating signals of a first frequency band from the wide frequency band signals, and the second dielectric filter is used for separating signals of a second frequency band from the wide frequency band signals; the low-pass filtering unit is used for suppressing frequency band signals larger than a target frequency band, wherein the target frequency band at least comprises the first frequency band and the second frequency band.
In an example, in the filtering antenna of this embodiment, the antenna unit 11 receives a wide frequency band signal, transmits the wide frequency band signal to the low pass filter 13 through the power dividing circuit 12, and divides the wide frequency band signal into a first frequency band signal and a second frequency band signal through the frequency divider 14, and the two signals are connected to the signal transceiving circuits of the corresponding frequency bands through the rf connector 15.
The antenna unit 11 is connected with the power dividing circuit 12, the power dividing circuit 12 is connected with the low-pass filter 13, the low-pass filter is connected with the frequency divider through a branching end point t3, the branching end point divides a signal path into two paths, one path is a path where a first end point t1 and a branching end point t3 are located, the first dielectric filter is connected between the first end point t2 and the branching end point, so that signals of a first frequency band are transmitted between the first end point t1 and the branching end point t3, and signals of a second frequency band are blocked; the other path is a path where the second end point t2 and the shunt end point t3 are located, the second dielectric filter is connected between the second end point and the shunt end point, so that the first end point t1 and the shunt end point t3 transmit signals of the first frequency band and prevent signals of the second frequency band, and the two paths of signals are connected with the signal transceiver circuit of the corresponding frequency band through the radio frequency connector 15.
In one example, the antenna unit 11 is a wide band unit, that is, the antenna unit is capable of receiving a wide band signal, the wide band signal is a concept relative to a narrow band signal, the narrow band signal refers to a signal including only one band, and the wide band signal includes signals of multiple bands, that is, an operating bandwidth of the antenna unit at least includes 2 bands, such as 2500MHz to 2690MHz and 3300MHz to 3800 MHz. The antenna unit 11 is connected to a power dividing circuit 12.
In one example, the power dividing circuit 12 includes a power divider and a phase shifter, and is configured to distribute signals to the antenna elements according to different amplitudes and phases, or combine multiple signals from the antenna elements into one signal.
It should be noted that, the LC filter is often used in terminal devices such as mobile phones, and has the characteristics of low cost, simple structure and high reliability, and the defects are small power capacity, poor filtering suppression and difficult control of parasitic coupling. The metal cavity filter is widely applied to base station communication equipment, has the characteristics of low insertion loss, good filtering inhibition and high reliability, and has the defects of large volume, heavy weight and high cost. The dielectric filter is a new technology which is started in recent years, and has the characteristics of small volume, low cost, light weight, good filtering inhibition, easy realization of surface-mounted welding and the like, but the high-frequency inhibition caused by a high-order mode of the dielectric filter is poor. The embodiment of the invention uses the dielectric filter, reduces the volume and the weight of the filter antenna and reduces the cost.
In order to compensate for the problem of poor suppression caused by the high-order mode of the dielectric filter, the embodiment of the invention uses the low-pass filter 13, which is a structure with a low-pass filtering function, to suppress signals with frequencies greater than the working frequency band of the antenna unit 11, thereby improving the high-frequency suppression capability of the whole system. In this embodiment, a signal passes through a frequency divider, the frequency divider has a filtering function, most of frequency components which do not meet the frequency requirement of the signal can be filtered, therefore, only a low-pass filter needs to be added to suppress high-frequency signals, namely, signals which are larger than the working frequency band of an antenna unit are suppressed, the high-frequency suppression capability of the antenna is improved, the requirement on the signal can be met, compared with the prior art, after the frequency divider, the high-frequency signals still need to pass through a filter which can attenuate more signal frequencies, so that the signal meets the actual requirement, the filter structure of the prior art is more complex and is not easy to integrate, the low-pass filter structure of the embodiment is simpler and is easy to integrate at an antenna end.
It should be noted that the low-pass filter is only an example, and any structure having a low-pass filtering function may be used, and is not limited herein.
Optionally, a low-pass filtering unit, such as a low-pass filter, may also be integrated in the power dividing circuit to improve the integration level of the filtering antenna.
Optionally, a splitting endpoint is integrated in the low-pass filtering unit, such as a low-pass filter, and the low-pass filter is located between the power dividing circuit and the frequency divider.
The filtering antenna of the embodiment integrates the functions of filtering and frequency division at the antenna end, thereby greatly improving the integration level.
It should be noted that the filtering antenna provided in this embodiment may also include a plurality of dielectric filters, and the plurality of dielectric filters separate the plurality of frequency band signals from the wide frequency band signal, so as to implement a multi-frequency filtering antenna.
The embodiment receives a broadband signal through an antenna unit, the antenna unit is connected with a power dividing circuit, the power dividing circuit is connected with a frequency divider, the frequency divider comprises a first dielectric filter and a second dielectric filter, the broadband signal is divided into a signal of a first frequency band and a signal of a second frequency band, so that signals of two frequency bands can be obtained without two large-scale array antennas, the size and the weight of the filter antenna are reduced, and in addition, the frequency divider has the functions of filtering and frequency dividing, is integrated at the antenna end, improves the integration level of the antenna, enables the filtering antenna to carry out frequency dividing and filtering, in addition, the dielectric filter has small volume, low cost and light weight, further reduces the volume and the weight of the filter antenna, reduces the cost of the filter antenna, a low-pass filtering unit is added in the filtering antenna, so that the high-frequency suppression capability of the whole antenna is improved.
The second embodiment of the present invention relates to a filtering antenna, and the difference between this embodiment and the first embodiment is mainly that: the low-pass filtering unit of the present embodiment includes a first low-pass filter and a second low-pass filter, the first low-pass filter being located between the shunt end point t3 and the first dielectric filter; the second low pass filter is located between the shunt terminal t3 and a second dielectric filter.
The filtering antenna of the present embodiment is shown in fig. 4.
The second embodiment of the present invention provides a filter antenna connected to a signal transceiver circuit via a radio frequency connector, the filter antenna including: an antenna unit 11, a power dividing circuit 12, a low-pass filtering unit 13, and a frequency divider 14; the antenna unit is connected with the power dividing circuit, the power dividing circuit is connected with the frequency divider, the frequency divider is connected with the signal transceiving circuit, the low-pass filtering unit comprises a first low-pass filter and a second low-pass filter, and the first low-pass filter is located between the shunt end point and the first dielectric filter; the second low pass filter is located between the shunt endpoint and a second dielectric filter; the antenna unit is used for receiving wide-band signals; the power dividing circuit is used for distributing amplitude and phase of the antenna unit; the frequency divider at least comprises a first dielectric filter and a second dielectric filter, wherein the first dielectric filter is used for separating signals of a first frequency band from the wide frequency band signals, and the second dielectric filter is used for separating signals of a second frequency band from the wide frequency band signals; the low-pass filtering unit is used for suppressing frequency band signals larger than a target frequency band, and the target frequency band at least comprises the first frequency band and the second frequency band.
In an example, the antenna unit 11 is connected to the power splitting circuit 12, the power splitting circuit 12 is connected to the low-pass filter unit 13 through a splitting end, that is, a splitting end, which splits the wide band signal into two paths and transmits the two paths of signals to the first dielectric filter and the second dielectric filter, respectively, that is, the splitting end shown in fig. 4 splits a signal path into two paths, one path is a path where the first end t1 and the splitting end t3 are located, the first dielectric filter is connected between the first end t2 and the splitting end, and the first low-pass filter is located between the first dielectric filter and the splitting end; the other path is a path where the second end point t2 and the shunt end point t3 are located, the second dielectric filter is connected between the second end point and the shunt end point, and the second low-pass filter is located between the second dielectric filter and the shunt end point.
In one example, the antenna unit 11 is a wide band unit, i.e. the operating bandwidth of the antenna unit comprises at least 2 frequency bands, such as 2500MHz to 2690MHz and 3300MHz to 3800 MHz. The antenna unit 11 is connected to a power dividing circuit 12.
In one example, the power dividing circuit 12 includes a power divider and a phase shifter, which are used to distribute signals to corresponding antenna elements according to different amplitudes and phases.
In one example, the frequency divider 14 comprises two sets of dielectric filters, wherein a first dielectric filter is connected between the first terminal t1 and the shunt terminal t3, so that the first terminal t1 and the shunt terminal t3 transmit signals of the first frequency band and block signals of the second frequency band. The second dielectric filter is connected between the second end point t2 and the shunt end point t3 for transmitting the signal of the second frequency band and blocking the signal of the first frequency band. The frequency divider composed of the first dielectric filter and the second dielectric filter can divide the signal of the first frequency band and the signal of the second frequency band.
In one example, the low-pass filtering unit 13 includes a first low-pass filtering unit and a second low-pass filtering unit, and both the first low-pass filtering unit and the second low-pass filtering unit are low-pass filters. The first low-pass filtering unit is located between the first dielectric filter and the branch terminal t3, so that the signal of the first frequency band is transmitted between the first terminal t1 and the branch terminal t 3. Also, a second low-pass filtering unit, i.e., a low-pass filter, is located between the second dielectric filter and the splitting terminal t3, so that the signal of the second frequency band is transmitted between the second terminal t2 and the splitting terminal t 3. The low-pass filter is a structure with a low-pass filtering function, and is used for inhibiting signals with frequencies larger than the working frequency range of the antenna unit 11, so that the high-frequency inhibition capability of the whole system is improved.
It should be noted that the low-pass filter is only an example, and any structure having a low-pass filtering function may be used, and is not limited herein.
Compared with the first embodiment, the first embodiment can be used for filtering the transmitted signal by using one low-pass filter when the pass-band difference of the dielectric filter is not large, and the embodiment can be used for filtering the two separated frequency bands by using two low-pass filters when the pass-band difference of the dielectric filter is large.
It should be noted that the frequency divider according to the embodiment of the present invention includes a first dielectric filter and a second dielectric filter, and the frequency divider divides a wide frequency band signal into a signal in a first frequency band and a signal in a second frequency band, and suppresses a signal larger than the first frequency band through the first low pass filter, and suppresses a signal larger than the second frequency band through the second low pass filter. When the frequency divider has a plurality of dielectric filters, the frequency divider may divide the wide band signal into a plurality of bands of signals, and correspondingly, the shunt end point may also divide the wide band signal path into a plurality of signal paths, and low pass filters may be connected to the signal paths of the plurality of bands of signals, for example, if the frequency divider divides the wide band signal into a first band of signals, a second band of signals, and a third band of signals through a first dielectric filter, a second dielectric filter, and a third dielectric filter, a first low pass filter is connected to the signal path of the first band of signals, a second low pass filter is connected to the signal path of the second band of signals, and a third low pass filter is connected to the signal path of the third band of signals. When signals of some frequency bands in the multiple frequency band signals divided by the frequency divider are similar, the same low-pass filter may also be used to suppress high-frequency signals of the multiple frequency bands with similar signals, for example, the frequency divider divides a wide frequency band signal into a signal of a first frequency band, a signal of a second frequency band, and a signal of a third frequency band, the frequency bands of the signal of the first frequency band and the signal of the second frequency band are similar, the first low-pass filter may be used to suppress signals larger than the first frequency band and signals larger than the second frequency band, and the second low-pass filter may be used to suppress signals larger than the third frequency band.
The second embodiment of the invention respectively connects the low-pass filters on the two signal paths divided by the shunt end point, can meet the requirement of the filter antenna on the signal isolation degree when the pass band of the filter is separated greatly, achieves the effects of frequency division and filtering by using the dielectric filter to form the frequency divider, introduces the low-pass filter, improves the high-frequency inhibition capability of the whole system, integrates the low-pass filter and the shunt end point, enables the low-pass filter to have the function of the shunt end point, and further improves the integration degree of the whole system.
The third embodiment of the present invention is substantially the same as the second embodiment except that: the low-pass filtering unit of this embodiment includes a first low-pass filtering unit and a second low-pass filtering unit, the first low-pass filter is located between the first dielectric filter and the signal transceiving circuit, and the second low-pass filter is located between the second dielectric filter and the signal transceiving circuit.
The filtering antenna of the present embodiment is shown in fig. 5.
The filtering antenna of the third embodiment is connected to the signal transceiver circuit through the rf connector 15, and includes: an antenna unit 11, a power dividing circuit 12, a low-pass filtering unit 13, and a frequency divider 14; the antenna unit is connected with the power dividing circuit, the power dividing circuit is connected with the frequency divider, the frequency divider is connected with the signal transceiving circuit, the low-pass filtering unit comprises 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 transceiving circuit, and the second low-pass filter is located between the second dielectric filter and the signal transceiving circuit; the power dividing circuit is used for distributing amplitude and phase of the antenna unit; the frequency divider comprises a first dielectric filter and a second dielectric filter, wherein the first dielectric filter is used for separating signals of a first frequency band from the wide frequency band signals, and the second dielectric filter is used for separating signals of a second frequency band from the wide frequency band signals; the low-pass filtering unit is used for suppressing frequency band signals larger than a target frequency band, and the target frequency band at least comprises the first frequency band and the second frequency band.
In one example, the antenna unit 11 is connected to the power dividing circuit 12, the power dividing circuit 12 is connected to the frequency divider 14 through a splitting end point, the splitting end point divides the signal path into two paths, one path is a path in which the first end point t1 and the splitting end point t3 are located, the first dielectric filter is connected between the first end point t2 and the splitting end point, and the first low pass filter is connected between the first dielectric filter and the first end point; the other path is a path where the second end point t2 and the shunt end point t3 are located, the second dielectric filter is connected between the second end point and the shunt end point, and the second low-pass filter is located between the second dielectric filter and the second end point.
In one example, the antenna unit 11 is a wide band unit, i.e. the operating bandwidth of the antenna unit comprises at least 2 frequency bands, such as 2500MHz to 2690MHz and 3300MHz to 3800 MHz. The antenna unit 11 is connected to a power dividing circuit 12.
In one example, the power dividing circuit 12 includes a power divider and a phase shifter, which are used to distribute the amplitude and phase of the antenna elements. The antenna unit has a plurality of antenna subunits, and the power dividing circuit gives signals to different antenna subunits according to amplitude and phase pairs or synthesizes broadband signals received by the plurality of antenna subunits into a broadband signal.
In one example, the frequency divider 14 comprises two sets of dielectric filters, wherein a first dielectric filter is connected between the first terminal t1 and the splitting terminal t3, so that the first terminal t1 and the splitting terminal t3 transmit signals of the first frequency band and block signals of the second frequency band. The second dielectric filter is connected between the second end point t2 and the shunt end point t3 for transmitting the signal of the second frequency band and blocking the signal of the first frequency band. The frequency divider composed of the first dielectric filter and the second dielectric filter can divide the signal of the first frequency band and the signal of the second frequency band.
Optionally, the frequency divider is connected to the power dividing circuit by surface mount welding or a probe structure. The frequency divider formed by the dielectric filter is connected with the power divider circuit in a surface-mount welding or probe connection mode, the functions of filtering and frequency division are integrated to the antenna end, the integration level of the whole system is improved, the purpose of weight reduction can be achieved by means of the characteristic that the weight of the dielectric filter is easy to label, and the purpose of weight reduction is achieved by means of the characteristic that the dielectric filter is easy to label and small in size.
It should be noted that, in the embodiment, the low-pass filtering unit 13 is taken as an independent device in the filtering antenna, but the position of the low-pass filtering unit is not limited thereto, and the position of the low-pass filtering unit may be changed according to needs, and the low-pass filtering unit may also be integrated into any component of the filtering antenna shown in fig. 3, for example, the low-pass filter may be integrated into the power dividing circuit 12 or other components in the form of microstrip lines or strip lines, which is not described herein in detail.
The frequency divider composed of the dielectric filters is connected with the power dividing circuit in a surface-mount welding or probe connection mode, the functions of filtering and frequency dividing are integrated to the antenna end, the integration level of the whole system is improved, the purpose of reducing weight can be achieved by means of the characteristic that the weight of the dielectric filters is easy to label, and the characteristics of small size and easy labeling of the dielectric filters are used, the dielectric filters are integrated to the antenna end, the purposes of reducing the use of radio frequency connectors and simplifying assembly are achieved.
A fourth embodiment of the present invention relates to a base station, which is equipped with the filtering antenna in the above embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A filtering antenna, the filtering antenna being connected to a signal transceiving circuit, the filtering antenna comprising: the antenna comprises an antenna unit, a power dividing circuit, a low-pass filtering unit and a frequency divider;
the antenna unit is connected with the power dividing circuit, the power dividing circuit is connected with the frequency divider, the frequency divider is connected with the signal transceiving circuit, the low-pass filtering unit is integrated in any one of the power dividing circuit, the antenna unit, the frequency divider and the signal transceiving circuit, or the low-pass filtering unit is located at any position between the antenna unit and the signal transceiving circuit;
the antenna unit is used for receiving wide-band signals;
the power dividing circuit is used for distributing amplitude and phase of the antenna unit;
the frequency divider at least comprises a first dielectric filter and a second dielectric filter, wherein the first dielectric filter is used for separating signals of a first frequency band from the wide frequency band signals, and the second dielectric filter is used for separating signals of a second frequency band from the wide frequency band signals;
the low-pass filtering unit is used for suppressing frequency band signals larger than a target frequency band, and the target frequency band at least comprises the first frequency band and the second frequency band.
2. The filtering antenna of claim 1, wherein the frequency divider and the power dividing circuit are connected by a surface mount solder or a probe structure.
3. The filtering antenna of claim 1, wherein the low-pass filtering unit comprises at least a first low-pass filter and a second low-pass filter, the first low-pass filter being configured to provide rejection of signals above the first frequency band, the second low-pass filter being configured to provide rejection of signals above the second frequency band;
wherein 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.
4. The filtering antenna of claim 1, wherein the low pass filtering unit is integrated with the frequency divider.
5. The filtering antenna of claim 1, further comprising a shunt endpoint;
the shunt end point is used for dividing the wide-band signal into at least two paths and transmitting the two paths of signals to the first dielectric filter and the second dielectric filter respectively.
6. The filtering antenna of claim 5, wherein the shunt endpoint is integrated with the low pass filtering unit, and the low pass filter is located between the power dividing circuit and the frequency divider.
7. The filtering antenna of claim 5, wherein the low pass filtering unit is integrated with the power dividing circuit, and the power dividing circuit is connected to the splitting terminal.
8. The filtering antenna of claim 5, wherein the power dividing circuit is connected to the low pass filtering unit, and the low pass filtering unit is connected to the shunt terminal.
9. The filtering antenna of claim 5, wherein the low-pass filtering unit comprises at least a first low-pass filter and a second low-pass filter, the first low-pass filter being configured to provide rejection of signals above the first frequency band, the second low-pass filter being configured to provide rejection of signals above the second frequency band;
wherein the first low pass filter is located between the shunt endpoint and the first dielectric filter; the second low pass filter is located between the shunt endpoint and a second dielectric filter.
10. A base station, characterized in that it comprises a filtering antenna according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011498807.4A CN114649670A (en) | 2020-12-17 | 2020-12-17 | Filtering antenna and base station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011498807.4A CN114649670A (en) | 2020-12-17 | 2020-12-17 | Filtering antenna and base station |
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| CN114649670A true CN114649670A (en) | 2022-06-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011498807.4A Pending CN114649670A (en) | 2020-12-17 | 2020-12-17 | Filtering antenna and base station |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115513627A (en) * | 2022-08-24 | 2022-12-23 | 声呐天空资讯顾问有限公司 | Frequency divider and antenna array |
| WO2024093502A1 (en) * | 2022-11-03 | 2024-05-10 | 深圳市锐尔觅移动通信有限公司 | Frequency divider, antenna apparatus, and electronic device |
-
2020
- 2020-12-17 CN CN202011498807.4A patent/CN114649670A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115513627A (en) * | 2022-08-24 | 2022-12-23 | 声呐天空资讯顾问有限公司 | Frequency divider and antenna array |
| CN115513627B (en) * | 2022-08-24 | 2024-02-06 | Oppo广东移动通信有限公司 | Frequency divider and antenna array |
| WO2024093502A1 (en) * | 2022-11-03 | 2024-05-10 | 深圳市锐尔觅移动通信有限公司 | Frequency divider, antenna apparatus, and electronic device |
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