CN112201958A - Multi-frequency antenna, antenna assembly and customer premises equipment - Google Patents
Multi-frequency antenna, antenna assembly and customer premises equipment Download PDFInfo
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- CN112201958A CN112201958A CN202010989398.1A CN202010989398A CN112201958A CN 112201958 A CN112201958 A CN 112201958A CN 202010989398 A CN202010989398 A CN 202010989398A CN 112201958 A CN112201958 A CN 112201958A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
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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
- 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
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/321—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements
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Abstract
The application relates to a multi-frequency antenna, an antenna assembly and customer premises equipment, wherein the multi-frequency antenna comprises a feed point, a first radiating body connected with the feed point, and a first radiating body comprising a first end part and a second end part which are oppositely arranged; the second radiator is arranged at an interval with the first end part; the third radiator is arranged at intervals with the second end part; the tuning unit is arranged between the first radiator and the second radiator and between the first radiator and the third radiator, the first radiator is respectively electrically connected with the second radiator and the third radiator through the tuning unit, two resonant frequencies with different frequencies can be generated, meanwhile, the size of the antenna can be further shortened, the directivity coefficient is reduced, and the gain of the multi-frequency antenna is reduced, so that the standard requirement of different areas on the gain of the transmitting antenna is met, and meanwhile, good communication performance can be kept.
Description
Technical Field
The application relates to the technical field of antennas, in particular to a multi-frequency antenna, an antenna assembly and customer premises equipment.
Background
With the development of internet services, users have higher and higher requirements for the network quality of broadband internet access. However, in order to ensure network quality, Customer Premise Equipment (CPE) may be installed in rural areas, towns, hospitals, institutions, factories, cells, and the like.
The antenna design of the traditional customer premises equipment continuously evolves towards the directions of multi-band, multi-polarization and high gain, and in order to realize high gain, the gain of a transmitting antenna exceeds the standard, and the requirement that the regulation is not met appears.
Disclosure of Invention
The embodiment of the application provides a multifrequency antenna, an antenna assembly and customer premises equipment, can reduce the gain through reducing the directivity factor of multifrequency antenna, can also keep good communication performance simultaneously.
A multi-frequency antenna, comprising:
at the point of the feed, the feed point,
the first radiating body is connected with the feeding point and comprises a first end part and a second end part which are oppositely arranged;
the second radiator is arranged at a distance from the first end part;
the third radiator is arranged at an interval with the second end part;
the tuning unit is arranged between the first radiator and the second radiator and between the first radiator and the third radiator, and the first radiator is electrically connected with the second radiator and the third radiator respectively through the tuning unit.
An antenna assembly, comprising:
a receiving antenna;
as in the case of the multi-frequency antenna described above,
and the switch module is respectively connected with the receiving antenna and the multi-frequency antenna and used for receiving the switching control signal and selectively switching on a receiving channel of the receiving antenna or a transmitting channel of the multi-frequency antenna according to the switching control signal.
A customer premises equipment comprising: the multi-frequency antenna or antenna assembly of any of the above embodiments.
According to the multi-frequency antenna, the antenna assembly and the customer premises equipment, the tuning unit is arranged between the first radiator and the second radiator, the tuning unit is additionally arranged between the first radiator and the third radiator, two resonant frequencies with different frequencies can be generated, meanwhile, the size of the antenna can be further shortened, the gain of the multi-frequency antenna is reduced by reducing the directivity coefficient, the standard requirement of different areas on the gain of the transmitting antenna is met, and meanwhile, good communication performance can be kept.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a multi-frequency antenna according to an embodiment;
fig. 2 is a second schematic structural diagram of the multi-frequency antenna according to an embodiment;
FIG. 3 is a schematic circuit diagram of a first lumped element in one embodiment;
fig. 4 is a third schematic structural diagram of a multi-frequency antenna according to an embodiment;
FIG. 5 is a diagram illustrating a structure of a multi-band antenna according to an embodiment;
fig. 6a is a schematic diagram illustrating a simulation of the distribution of a low-frequency current of 2.6GHz in the multi-frequency antenna of fig. 5 according to an embodiment;
FIG. 6b is a diagram illustrating simulation of the distribution of low frequency current at 2.6GHz in a conventional antenna according to an embodiment;
figure 6c is a three-dimensional pattern of the resonance of the multi-frequency antenna of figure 5 at 2.6GHz in one embodiment;
fig. 7a is a schematic diagram illustrating a simulation of the distribution of a 3.5GHz high-frequency current in the multi-frequency antenna shown in fig. 5 according to an embodiment;
fig. 7b is a schematic diagram illustrating a simulation of the distribution of a 3.9GHz high-frequency current in the multi-frequency antenna shown in fig. 5 according to an embodiment;
fig. 8a is a three-dimensional pattern of the resonance of the multi-frequency antenna shown in fig. 5 at 3.5GHz in one embodiment;
fig. 8b is a three-dimensional pattern of the resonance of the multi-frequency antenna shown in fig. 5 at 3.9GHz in one embodiment;
FIG. 9 is a graph of the maximum gain at 2.6GHz, 3.5GHz and 3.9GHz, respectively, for the resonance of the multi-frequency antenna in one embodiment;
FIG. 10 is a schematic diagram of an antenna assembly in one embodiment;
FIG. 11 is a block diagram that illustrates a framework for a client front-end device in one embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish one element from another. For example, the first radiator may be referred to as a second radiator, and similarly, the second radiator may be referred to as a first radiator, without departing from the scope of the present application. The first radiator and the second radiator are both radiators, but they are not the same radiator.
Furthermore, the terms "first", "second" and "first" 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, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the description of the present application, "a number" means at least one, such as one, two, etc., unless specifically limited otherwise.
The embodiment of the application provides a multi-frequency antenna. The multi-frequency antenna may be built in a Customer Premises Equipment (CPE) having a wireless communication function, which may be a handheld device, a vehicle-mounted device, a wearable device, a computing device, a Customer Premises Equipment (CPE) or other processing device connected to a wireless modem, and various forms of User Equipment (UE) (e.g., a Mobile phone), a Mobile Station (MS), and so on. The customer premise equipment is used for realizing a network access function and converting an operator public network WAN into a user home local area network LAN. According to the current internet broadband access mode, the access modes can be classified into FTTH (fiber to the home), DSL (digital telephone line access), Cable (Cable television line access), and Mobile (Mobile access, i.e. wireless CPE). The client front-end equipment is mobile signal access equipment for receiving mobile signals and transmitting the mobile signals by wireless WIFI signals, is equipment for converting high-speed 4G or 5G signals into WiFi signals, and can support a plurality of mobile terminals to access a network simultaneously. For convenience of description, the above-mentioned devices are collectively referred to as a customer premises equipment.
As shown in fig. 1, the present application provides a multi-frequency antenna. In one embodiment, the multi-frequency antenna includes a feeding point 110, a first radiator 120, a second radiator 130, a third radiator 140, and a tuning unit 150. The feeding point 110 can be used as an antenna feeding point for feeding a current signal to the first radiator 120. For example, a current signal provided from a signal source mounted on the substrate 101 may be fed to the first radiator 120 through the feeding point 110 to form a current transmission path between the substrate 101 and the first radiator 120.
In one embodiment, the substrate 101 may be a PCB or FPC board as part of the customer premises equipment. The substrate 101 may integrate electronic components such as a processor, a baseband processor, a radio frequency transceiver unit, and a radio frequency front end unit of the customer premises equipment, and is configured to provide a signal source (a current signal) to the first radiator 120.
The first radiator 120, the second radiator 130, and the third radiator 140 may be integrated on the substrate 101. The first radiator 120, the second radiator 130, and the third radiator 140 may be any conductive devices having a specific length. For example, it may be a conductive patch, a microstrip line on the substrate 101, or the like. The material of the conductive device may be a conductive material, such as a metal material, an alloy material, a conductive silica gel material, a graphite material, or the like, and the material of the conductive device may also be a material having a high dielectric constant, such as glass, plastic, ceramic, or the like having a high dielectric constant.
The first radiator 120 includes a first end a and a second end B opposite to each other in the first direction. The first direction may be understood as a length direction of the first radiator 120 or an extending direction of the first radiator 120, as indicated by an arrow direction in the drawing. The second radiator 130 is spaced apart from the first end a of the first radiator 120, and the third radiator 140 is spaced apart from the second end B of the first radiator 120, that is, a first gap is formed between the second radiator 130 and the first end a, and a second gap is also formed between the third radiator 140 and the second end B. The widths of the first gap and the second gap may be the same or different.
In the embodiment of the present application, the shapes and materials of the second radiator 130 and the third radiator 140 may be the same, the materials of the first radiator 120, the second radiator 130 and the third radiator 140 may be the same, and the shapes of the first radiator 120 and the second radiator 130 may be different. Further, the length dimensions of the second radiator 130 and the third radiator 140 in the extending direction are associated with the range of the first frequency band, the length of the second radiator 130 in the extending direction, and the range of the second frequency band, which are required to be radiated by the multi-frequency antenna.
The tuning unit 150 is disposed between the first radiator 120 and the second radiator 130, and between the first radiator 120 and the third radiator 140, and the first radiator 120 is connected to the second radiator 130 and the third radiator 140 through the tuning unit 150, respectively. Specifically, the tuning unit 150 may be disposed in a first slot and a second slot, where the tuning unit 150 located in the first slot may be electrically connected to the first radiator 120 and the second radiator 130, respectively, and the tuning unit 150 located in the second slot may be electrically connected to the first radiator 120 and the third radiator 140, respectively, and thus the first radiator 120, the second radiator 130, and the third radiator 140 are electrically connected.
When the first current signal is fed to the first radiator 120 through the feed point, the first current signal may flow from the first radiator 120 to the second radiator 130 and the third radiator 140 through the tuning unit 150, so that the first radiator 120, the second radiator 130 and the third radiator 140 jointly excite the first resonant frequency, and further the first radiator 120, the second radiator 130 and the third radiator 140 jointly radiate the radio frequency signal of the first frequency band. When the second current signal is fed to the first radiator 120 through the feed point, the tuning unit 150 may block the second circuit signal from being transmitted to the second radiator 130 and the third radiator 140, so that the first radiator 120 excites the second resonant frequency, and the first radiator 120 radiates the rf signal in the second frequency band. Specifically, the first resonant frequency is smaller than the second resonant frequency, and correspondingly, the frequency range of the first frequency band is smaller than the frequency range of the second frequency band. For example, the first current signal may be a low-frequency current signal of 2.6GH, and the corresponding first frequency band may be a B41 frequency band; the first current signal may be a high frequency current signal of 3.5GHz and 3.9GHz, and the corresponding second frequency band may be a B42, N77 frequency band.
In the multi-frequency antenna provided in this embodiment, the tuning unit 150 is disposed between the first radiator 120 and the second radiator 130, and the tuning unit 150 is added between the first radiator 120 and the third radiator 140, so as to generate two resonant frequencies with different frequencies, and at the same time, the size of the antenna can be further reduced, and the gain of the multi-frequency antenna can be reduced by reducing the directivity coefficient, so as to meet the standard requirement of different areas on the gain of the transmitting antenna. The directivity coefficient is the ratio of the power density of a certain point of a far zone of the antenna in the maximum radiation direction to the power density of a non-directional antenna with the same radiation power at the same point, wherein the antenna gain is the directivity coefficient. Therefore, when the multi-frequency antenna is used as a transmitting antenna, the gain of the multi-frequency antenna can be reduced by reducing the directivity coefficient of the multi-frequency antenna under the condition of keeping the efficiency of the multi-frequency antenna unchanged, the limitation of the regulations of each region is met, and meanwhile, good communication performance can be kept.
In one embodiment, referring to fig. 1, the tuning unit 150 includes a first lumped element 151 and a second lumped element 152, wherein the first lumped element 151 is disposed between the first radiator 120 and the second radiator 130 and connects the first radiator 120 and the second radiator 130; the second lumped element 152 is disposed between the first radiator 120 and the third radiator 140, and connects the first radiator 120 and the third radiator 140. Specifically, the first lumped element 151 may be connected in series between the first end a of the first radiator 120 and the second radiator 130, and the second lumped element 152 may be connected in series between the first end a of the first radiator 120 and the third radiator 140.
The first lumped element 151 disposed in the first slot and the second lumped element 152 disposed in the second slot may be the same or different. In the embodiment of the present application, the first lumped element 151 is the same as the second lumped element 152, and the first lumped element 151 is taken as an example for description.
As shown in fig. 2, in one embodiment, the first lumped element 151 includes a capacitor C and an inductor L. Specifically, the capacitor C and the inductor L are connected in parallel, and the parallel capacitor C and the parallel inductor L may form an LC parallel resonant circuit. When the LC parallel resonant circuit is connected in series to the first end a of the first radiator 120 andin the second radiator 130, if the current signal fed by the first radiator 120 is a high-frequency current signal, the first lumped element 151 may be equivalent to a band-stop-like filter, where the resonant frequency of the LC parallel resonant circuit is the frequency of the stop band. Specifically, in the LC parallel resonance circuit, if the current in the inductor L is equal to the current in the capacitor C, the circuit reaches a parallel resonance state. Due to the LC parallel resonant circuit at the resonant frequency foWhere the impedance is the largest, the signal at the resonance frequency point cannot pass through the LC parallel resonance circuit, i.e., the signal at the resonance frequency point is cut off at the first end a and the second end B of the first radiator 120. If the current signal fed by the first radiator 120 is a low frequency current signal, the low frequency current signal can reach the second radiator 130 and the third radiator 140 through the inductor L.
In one embodiment, the first lumped element 151 and the second lumped element 152 are the same and each include a capacitor C and an inductor L connected in parallel, wherein when the capacitance value of the capacitor C is 0.5pF and the inductance L of the inductor L is 3.7nF, the fed current signal is a low-frequency current signal of 2.6GHz, and the first radiator 120, the first lumped element 151, the second radiator 130, the second lumped element 152 and the third radiation together form a transmission path of the low-frequency current signal of 2.6GHz, so as to jointly excite low-frequency resonance, that is, the current signal can be transmitted from the first radiator 120 to the second radiator 130 through the inductor L of the first lumped element 151 and from the first radiator 120 to the third radiator 140 through the inductor L of the second lumped element 152. Correspondingly, when the fed current signals are high-frequency current signals of 3.5G and 3.9GHz, the resonance formula is adopted
It is possible to calculate the resonant frequency of the LC to be 3.7GHz, that is, the intermediate frequency points of 3.5G and 3.9GHz, wherein the high-frequency current signals of 3.5G and 3.9GHz are blocked by the first lumped element 151 and the second lumped element 152, and the high-frequency current signals of 3.5G and 3.9GHz can only be transmitted in the first radiator 120, so that the first radiator 120 excites the high-frequency resonance.
It should be noted that, in the embodiment of the present application, the capacitance value of the capacitor C and the inductance value of the inductor L may be adjusted to meet different frequency requirements. Meanwhile, the resonant frequency can be adjusted to meet different frequency requirements by adjusting the length dimension of the first radiator 120 in the extending direction, that is, changing the positions of the first lumped element 151 and the second lumped element on the first radiator 120.
In one embodiment, the first lumped element 151 may further include a capacitor C and a resistor connected in parallel.
In one embodiment, the first lumped element 151 includes a T-type network and a pi-type network formed of a plurality of capacitors C and inductors L.
As shown in fig. 3, in one embodiment, the first lumped element 151 and the second lumped element 152 may further include a multi-stage LC resonant circuit 1511, that is, a multi-stage LC resonant circuit 1511 arranged in series, wherein the LC resonant circuit 1511 includes a capacitor C and an inductor L connected in parallel. Based on this, for high frequency signals, the first lumped element 151 and the second lumped element 152 can be equivalent to a plurality of stopband-like filters to form a multi-stopband, thereby satisfying the communication requirement of multi-frequency bands. Specifically, the parameter values of the capacitor C and the inductor L in each stage of the series LC resonant circuit 1511 may be the same or different, and the specific parameters of each stage of the LC resonant circuit 1511 and the number of the LC resonant circuits 1511 may be set according to the requirement of the communication frequency band. In the embodiment of the present application, the composition and the number of the LC resonant circuits 1511 are not further limited.
In one embodiment, the first radiator 120 includes a first radiating arm 121 and a second radiating arm 122 that are disposed at an interval, that is, a third slot is formed between the first radiating arm 121 and the second radiating arm 122, and the feeding point 110 may be located in the third slot and electrically connected to the first radiating arm 121 and the second radiating arm 122, respectively. Wherein the multi-frequency antenna further comprises a feed trace, such as a coaxial feed line. The outer conductor of the feed line is connected to the first radiating arm 121 via the feed point 110, and the inner conductor of the feed line is connected to the second radiating arm 122 via the feed point 110. The feeding trace is further connected to the feeding source on the substrate 101, so as to feed a current signal provided by the feeding source to the first radiator 120 through the feeding trace and the feeding point 110. The feeding point 110 can be understood as a connection point of a feeding trace and the first radiator 120.
As shown in fig. 4, in one embodiment, the first radiating arm 121 and the second radiating arm 122 have the same shape, and may be rectangular arms, trapezoidal arms, or irregular arms formed by combining a plurality of rectangular bars. Specifically, the first and second radiating arms 121 and 122 are symmetrically disposed about the feeding point 110. Illustratively, the first radiating arm 121 and the second radiating arm 122 may each be a rectangular arm, and the first radiating arm 121 and the second radiating arm 122 are disposed axisymmetrically with respect to the feeding point 110. The first and second radiating arms 121 and 122 may be irregular arms, and the first and second radiating arms 121 and 122 are disposed symmetrically about the center of the feeding point 110.
In one embodiment, the first radiating arm 121 and the second radiating arm 122 may be non-rectangular arms, and specifically, the first radiating arm 121 includes a first radiating portion 1211 and a second radiating portion 1212, which are connected to each other; the second radiating arm 122 includes a third radiating portion 1221 connected to the second radiating portion 1222 and a fourth radiating portion 1222 bent and disposed. The first radiation portion 1211 and the third radiation portion 1221 are arranged in parallel at intervals, and the feeding point 110 is arranged between the first radiation portion 1211 and the third radiation portion 1221; in the extending direction, a side of the first radiation portion 1211 away from the feeding point 110 is used as a first end portion a, and a side of the fourth radiation portion 1222 away from the feeding point 110 is used as a second end portion B, wherein a straight line in which the first end portion a and the second end portion B are located is arranged in parallel with the extending direction. By setting the first radiation arm 121 and the second radiation arm 122 to be irregular geometric shapes, the directivity coefficient can be effectively reduced, and the communication performance of the multi-frequency antenna can be ensured.
As shown in fig. 5, in one embodiment, the first radiating arm 121 and the second radiating arm 122 may be both irregular arms, but the first radiating arm 121 and the second radiating arm 122 are different in shape. The fourth radiation portion 1222 of the second radiation arm 122 may be formed of a plurality of radiation subsections. For example, the fourth radiation portion 1222 may include a first radiation sub-portion, a second radiation sub-portion, and a third radiation 1221 sub-portion, wherein the first radiation sub-portion and the third radiation sub-portion 1221 are respectively disposed in parallel with the first radiation portion 1211 at an interval, and the second radiation sub-portion is respectively connected to the first radiation sub-portion, the third radiation sub-portion 1221, and the third radiation sub-portion 1221. Wherein a side of the first radiator portion away from the feeding point 110 serves as a second end portion B of the first radiator 120. By setting the first radiating arm 121 and the second radiating arm 122 to be irregular geometric shapes, and the shapes of the first radiating arm 121 and the second radiating arm 122 are different, the directivity coefficient can be effectively reduced, and meanwhile, the communication performance of the multi-frequency antenna can be ensured.
In one embodiment, in the extending direction of the first radiator 120, the distance between the second radiator 130 and the feeding point 110 is equal to the distance between the third radiator 1221 body 140 and the feeding point 110. That is, the distance from the first end a of the first radiator 120 to the feeding point 110 is equal to the distance from the second end B of the first radiator 120 to the feeding point, so that the multi-frequency antenna can be equivalent to a half-wave dipole antenna.
In the embodiment of the present application, the shapes, the forming processes, and the like of the first radiator 120, the second radiator 130, and the third radiator 1221 body 140 are not further limited.
In one embodiment, a multi-frequency antenna shown in fig. 5 is taken as an example for explanation, in the multi-frequency antenna shown in fig. 5, each of the first lumped element 151 and the second lumped element 152 includes a capacitor C and an inductor L arranged in parallel. Specifically, the capacitance C in the first and second lumped elements 151 and 152 may be configured to be 0.5pF, and the inductance L may be configured to be 3.7 nH.
When it is required to radiate a radio frequency signal in a low frequency band, the first radiator 120 may feed a low frequency current signal, for example, a low frequency current signal of 2.6GHz, through the feeding point 110. As can be seen from the simulation of fig. 6a, the 2.6GHz low frequency current is mainly concentrated on the paths of the first radiator 120, the second radiator 130 and the third radiator 1221, as indicated by the dashed boxes. By providing the first lumped element 151 and the second lumped element 152 on the multi-frequency antenna, the size of the multi-frequency antenna can be shortened as shown by a dotted line box, compared to an antenna in which the first lumped element 151 and the second lumped element 152 are not integrated as shown in fig. 6 b. As shown in fig. 6a and 6b, in both antennas resonating at 2.6GHz, the length dimension of the substrate 101 of the antenna without the first lumped element 151 and the second lumped element 152 is 44mm, and the length dimension of the substrate 101 loaded with the first lumped element 151 and the second lumped element 152 is 36mm, which reduces the size of the multi-frequency antenna by 19%. Based on this, when the multi-frequency antenna radiates a radio frequency signal with a center frequency of 2.6GHz, the three-dimensional pattern of the multi-frequency antenna is as shown in fig. 6c, and it is seen that the three-dimensional pattern of the 2.6GHz frequency point (the center frequency point of B41) is horizontally omnidirectional, the maximum gain is 2.3dBi, which is smaller than the maximum gain value of 2.5dBi of the regulation, and the requirement of the regional regulation is met.
When it is required to radiate radio frequency signals of a high frequency band, the first radiator 120 may be fed with high frequency current signals, for example, 3.5G and 3.9GHz high frequency current signals, through the feeding point 110. As can be seen from the simulation of fig. 7a and 7B, the high frequency current signals of 3.5G and 3.9GHz are cut off at the first end a and the second end B of the first radiator 120 by the first lumped element 151 and the second lumped element 152. Based on this, when the multi-frequency antenna radiates a radio frequency signal with a center frequency of 3.5GHz, a three-dimensional pattern of the multi-frequency antenna is shown in fig. 8 a. When the multi-frequency antenna radiates a radio frequency signal with a center frequency of 3.9GHz, a three-dimensional directional diagram of the multi-frequency antenna is shown in fig. 8 b. As can be seen from fig. 8a, 8B, and 9, the three-dimensional pattern at the frequency point of 3.5GHz (the center frequency point of B41) is horizontally omnidirectional, the maximum gain is 2.3dBi, the three-dimensional pattern at the frequency point of 3.9GHz (the frequency point of N77) is horizontally omnidirectional, the maximum gain is 2.4dBi, the gain values are all smaller than the maximum gain value of 2.5dBi of the regulations, and the requirements of the regional regulations are met.
The embodiment of the application also provides an antenna component. As shown in fig. 10, in one embodiment, the antenna assembly 11 includes a receiving antenna 151, a switching module 161, and the multi-frequency antenna 100 in any of the above embodiments. The receiving antenna 151 is configured to receive radio frequency signals of different frequency bands, and the antenna may be formed by using any suitable type of antenna. The multi-band antenna 100 is used for transmitting radio frequency signals of different frequency bands. Specifically, the receiving antenna 151 may include an antenna having a resonant element formed of the following antenna structure: at least one of an array antenna structure, a loop antenna structure, a patch antenna structure, a slot antenna structure, a helical antenna structure, a strip antenna, a monopole antenna, a dipole antenna, and the like. Different types of antennas may be used for different frequency bands and frequency band combinations. For example, at least an antenna for receiving or transmitting millimeter wave frequency bands, sub-6GHz frequency bands, 2G, 3G, 4G frequency bands may be included.
The switch module 161 is respectively connected to the receiving antenna 151 and the multi-frequency antenna 100, and configured to receive the switching control signal and selectively turn on a receiving channel of the receiving antenna 151 and a transmitting channel of the multi-frequency antenna 100 according to the switching control signal. That is, the switching control signal can control the on/off of different channels in the switch module 161. A transmit channel is understood to be a communication link that enables the transmission control of radio frequency signals in a customer premises setting. Illustratively, the transmit path may include a radio frequency transceiver, a power amplifier, a filter, a switch module 161, a plurality of antennas, etc. A receive channel is understood to be a communication link enabling the reception control of radio frequency signals in a client premises arrangement. Illustratively, the receiving channel may include a radio frequency transceiver, a low noise amplifier, a filter, a switch module 161, a receiving antenna 151, and the like. In the embodiment of the present application, the devices specifically included in the transmitting channel and the receiving channel are not further limited.
In the foregoing antenna assembly, the receiving antenna 151 and the transmitting antenna can be separately disposed, and the switch module 161 is controlled to dynamically switch between the transmitting channel and the receiving channel, when switching to the transmitting channel, the transmitting gain of the antenna can be attenuated based on the multi-frequency antenna 100, and when switching to the receiving channel, the receiving gain of the antenna is not changed, so that the maximum receiving gain can be realized while meeting the requirements of regulations, and the optimal receiving performance of the antenna assembly can be realized.
The embodiment of the application also provides the client front-end equipment. As shown in fig. 11, in one embodiment, the client front-end device includes a radio frequency system 10, a memory 20, a processor 30, and a communication bus. Those skilled in the art will appreciate that the configuration of the customer premises equipment shown in fig. 11 does not constitute a limitation of the customer premises equipment, and may include more or less components than those shown, or combine certain components, or arrange different components, and embodiments of the present invention are not limited thereto.
The rf system 10 may further include a baseband processor 101, an rf transceiver unit 102, an rf front-end unit 103, and an antenna assembly 11. The baseband processor 101 may provide the network information to the processor 30. The network information may include raw and processed information associated with wireless performance metrics of the Received antenna signals, such as Received Power, transmitted Power, Reference Signal Received Power (RSRP), Reference Signal Received Quality (RSRQ), Received Signal Strength Indicator (RSSI), Signal to Noise Ratio (SNR), Rank of MIMO channel matrix (Rank), carrier to Interference plus Noise Ratio (RS-CINR), frame error rate, bit error rate, channel quality measurement based on signal quality data such as Ec/lo or c/No data, information on whether a response (reply) corresponding to a request from a mobile terminal is being received from a base station, information on whether a network access procedure is successful, and the like.
The radio frequency transceiver unit 102 may include one or more radio frequency transceivers, such as transceivers (e.g., one or more transceivers shared between antennas, one transceiver per antenna, etc.). Illustratively, a transceiver may include a transmitter (such as transmitter TX) and a receiver (such as receiver RX), or may include only a receiver (e.g., receiver RX) or only a transmitter (e.g., transmitter TX). For example, the transceiver may be used to implement frequency conversion processing between the intermediate frequency signal and the baseband signal, or/and to implement frequency conversion processing between the intermediate frequency signal and the high frequency signal, and so on. The transmitter may be used to send data and/or signaling, etc. to the base station. The receiver may be configured to receive data and/or signaling transmitted by the base station, etc.
The baseband processor 101 may receive digital data to be transmitted from the processor 30 and may also transmit a corresponding antenna signal using the radio frequency transceiving unit 102. The radio frequency front end unit 103 may be coupled between the radio frequency transceiving unit 102 and the antenna and may be used to pass radio frequency signals generated by the transmitter and to the antenna. The rf front-end unit 103 may include rf switches, impedance matching circuits, filters, and other circuits for interfacing between the antenna and the rf transceiver unit 102.
The processor 30 is used to provide, among other things, computational and control capabilities to support the operation of the entire customer premises equipment. The processor 30 is the control center of the customer premises equipment and the processor 30 may be a general purpose central processing unit, a microprocessor, an application specific integrated circuit, or one or more integrated circuits for controlling the execution of the program of the present solution. Processor 30 may analyze the received network information and in response, the processor (or baseband processor 101, control module 210, if desired) may issue control commands for controlling radio frequency system 10. For example, the processor 30 may send a switching control signal to control the conducting state of the switch module 161110 to select to conduct the transmitting path of the transmitting antenna or the receiving path of the receiving antenna 151.
The memory 20 may include a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory 20 provides a cached execution environment for operating system computer programs in the non-volatile storage medium. The processor 30 and the memory 20 may communicate information over a communication bus.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A multi-frequency antenna, comprising:
a feed point;
the first radiating body is connected with the feeding point and comprises a first end part and a second end part which are oppositely arranged;
the second radiator is arranged at a distance from the first end part;
the third radiator is arranged at an interval with the second end part;
the tuning unit is arranged between the first radiator and the second radiator and between the first radiator and the third radiator, and the first radiator is electrically connected with the second radiator and the third radiator respectively through the tuning unit.
2. The multi-frequency antenna of claim 1, wherein the tuning unit comprises a first lumped element and a second lumped element, wherein the first lumped element is disposed between the first radiator and the second radiator and electrically connects the first radiator and the second radiator; the second lumped element is disposed between the first radiator and the third radiator and electrically connects the first radiator and the third radiator.
3. The multi-frequency antenna of claim 2, wherein the first and second lumped elements each comprise a capacitance and an inductance.
4. The multi-frequency antenna of claim 3, wherein the first lumped element comprises a plurality of series-arranged LC resonant circuits comprising a capacitor and an inductor.
5. The multi-frequency antenna of claim 1, wherein the first radiator comprises a first radiating arm and a second radiating arm, wherein the feed point is disposed between the first radiating arm and the second radiating arm; wherein the multi-frequency antenna further comprises:
the outer conductor of the feed line is connected with the first radiation arm, the inner conductor of the feed line is connected with the second radiation arm, and the connection point of the feed line and the first radiator is the feed point.
6. The multi-frequency antenna of claim 5, wherein the first and second radiating arms are symmetrically disposed about the feed point.
7. The multi-frequency antenna of claim 5 or 6, wherein the first radiating arm comprises a first radiating portion and a second radiating portion, wherein the first radiating portion is connected with the second radiating portion; the second radiation arm comprises a third radiation part and a fourth radiation part, wherein the third radiation part is connected with the fourth radiation part,
the first radiation part and the third radiation part are arranged in parallel at intervals, and the feeding point is arranged between the first radiation part and the third radiation part;
in the extending direction, one side of the first radiating part, which is far away from the feeding point, is used as the first end part, and one side of the fourth radiating part, which is far away from the feeding point, is used as the second end part, wherein a straight line where the first end part and the second end part are located is arranged in parallel with the extending direction.
8. The multi-band antenna of claim 5, wherein a distance between the second radiator and the feed point is equal to a distance between the third radiator and the feed point in a direction in which the first radiator extends.
9. An antenna assembly, comprising:
a receiving antenna;
multi-frequency antenna according to one of claims 1 to 8,
and the switch module is respectively connected with the receiving antenna and the multi-frequency antenna and used for receiving the switching control signal and selectively switching on a receiving channel of the receiving antenna or a transmitting channel of the multi-frequency antenna according to the switching control signal.
10. A client premises apparatus, comprising:
the multi-frequency antenna of claims 1-8, or,
an antenna assembly as defined in claim 9.
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| CN202010989398.1A CN112201958B (en) | 2020-09-18 | 2020-09-18 | Multi-frequency antenna, antenna assembly and customer premises equipment |
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| CN202010989398.1A CN112201958B (en) | 2020-09-18 | 2020-09-18 | Multi-frequency antenna, antenna assembly and customer premises equipment |
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