CN116093571A

CN116093571A - Low mutual coupling unequal power divider and base station antenna

Info

Publication number: CN116093571A
Application number: CN202310069091.3A
Authority: CN
Inventors: 孙波; 周书磊
Original assignee: CICT Mobile Communication Technology Co Ltd
Current assignee: CICT Mobile Communication Technology Co Ltd
Priority date: 2023-01-13
Filing date: 2023-01-13
Publication date: 2023-05-09

Abstract

The invention provides a low mutual coupling unequal power divider and a base station antenna, wherein the low mutual coupling unequal power divider comprises: the device comprises a dielectric substrate, an input transmission line, a first output transmission line, a second output transmission line and an isolation resistor, wherein the input transmission line, the first output transmission line, the second output transmission line and the isolation resistor are arranged on the dielectric substrate; the first output transmission line and the second output transmission line are connected with the input transmission line, and the isolation resistor is connected with the first output transmission line and the second output transmission line; the input transmission line is provided with the input, and first output transmission line is provided with first output, and the second output transmission line is provided with the second output, and input, first output and second output are located the same side department of medium base plate, and isolation resistance is close to edge department. The input end is used for inputting a main path signal, the main path signal is output through the first output end and the second output end, the power of the output signals of the two output ends is different, and meanwhile, the isolation resistors are arranged at the first output end and the second output end, so that mutual coupling of the two output ends can be reduced, and the beam convergence effect is improved.

Description

Low mutual coupling unequal power divider and base station antenna

Technical Field

The present invention relates to the field of communications devices, and in particular, to a low mutual coupling unequal power divider and a base station antenna.

Background

In recent years, antennas have been gradually miniaturized, such as shortened width and length of the antennas. For a multi-channel antenna, the main problem caused by the narrowing of the antenna width is that the antenna column pitch becomes smaller and the horizontal bandwidth of the antenna becomes wider. The horizontal bandwidth of the antenna is one of indexes for measuring the coverage effect of the antenna, and the horizontal bandwidth is widened, so that problems such as coverage area coverage and coverage effect deterioration are easily generated.

In general, in a miniaturized antenna, there are two optimized schemes of the antenna, the first is to connect one radiating element of the same type in parallel in the horizontal direction, and combine the two parallel patterns of the two radiating elements with the main array pattern after narrowing, but this scheme increases the number of radiating elements and the length of the antenna; the second is to adopt a diagonal-pulling type array mode, so that the length size of the antenna is not increased, but the beam convergence cannot be realized in a wide frequency band due to the wave width characteristic of each frequency point.

Disclosure of Invention

The invention provides a low-mutual-coupling unequal power divider and a base station antenna, which are used for solving the problem that a miniaturized antenna in the prior art cannot realize beam convergence.

In a first aspect, the present invention provides a low mutual coupling unequal power divider, comprising: the device comprises a dielectric substrate, an input transmission line, a first output transmission line, a second output transmission line and an isolation resistor, wherein the input transmission line, the first output transmission line and the second output transmission line are arranged on the dielectric substrate;

the first output transmission line and the second output transmission line are connected with the input transmission line, and the isolation resistor is connected with the first output transmission line and the second output transmission line;

the input transmission line is provided with an input end, the first output transmission line is provided with a first output end, the second output transmission line is provided with a second output end, the input end, the first output end and the second output end are positioned at the same side edge of the medium substrate, and the isolation resistor is close to the edge.

According to the low mutual coupling unequal power divider provided by the invention, the dielectric substrate is provided with a plurality of bonding pads at the edge, and the bonding pads are respectively in one-to-one correspondence with the input end, the first output end and the second output end;

each bonding pad is provided with a metallized via hole, and each bonding pad is connected with the grounding surface on the dielectric substrate through the corresponding metallized via hole.

According to the low mutual coupling unequal power divider provided by the invention, the distance between the isolation resistor and the edge is less than or equal to 18-22 mm.

According to the low mutual coupling unequal power divider provided by the invention, the dielectric substrate is provided with at least one of a mounting hole and a connecting piece;

under the condition that the mounting holes are formed in the dielectric substrate, the fasteners penetrate through the mounting holes so as to connect the dielectric substrate to a functional device;

and under the condition that the connecting piece is arranged on the dielectric substrate, the dielectric substrate is connected to the functional device through the connecting piece.

In a second aspect, the present invention provides a base station antenna comprising: the low mutual coupling unequal power divider comprises a first low mutual coupling unequal power divider and a second low mutual coupling unequal power divider;

the first antenna array and the second antenna array are arranged on the reflecting plate side by side, and the first antenna array and the second antenna array comprise a plurality of radiation units;

the output port of the first phase shifter is connected with the input end of the first low mutual coupling unequal power divider, the first output end of the first low mutual coupling unequal power divider is connected with the Nth radiating element in the first antenna array, and the second output end of the first low mutual coupling unequal power divider is connected with the (n+1) th radiating element in the second antenna array;

the output port of the second phase shifter is connected with the input end of the second low mutual coupling unequal power divider, the first output end of the second low mutual coupling unequal power divider is connected with the Nth radiating element in the second antenna array, and the second output end of the second low mutual coupling unequal power divider is connected with the (n+1) th radiating element in the first antenna array.

According to the base station antenna provided by the invention, the first antenna array and the second antenna array comprise M radiating units, and M is more than or equal to 3;

wherein M-1 is greater than or equal to N is greater than or equal to 1.

According to the base station antenna provided by the invention, the first low-mutual-coupling unequal power divider is arranged between an Nth radiating element and an (n+1) th radiating element in the first antenna array;

the second low cross coupling unequal power divider is arranged between an Nth radiating element and an (n+1) th radiating element in the second antenna array.

According to the base station antenna provided by the invention, the output port of the first phase shifter is connected with the input end of the first low mutual coupling unequal power divider through a first coaxial cable, the first output end of the first low mutual coupling unequal power divider is connected with the Nth radiating element in the first antenna array through a second coaxial cable, and the second output end of the first low mutual coupling unequal power divider is connected with the (n+1) th radiating element in the second antenna array through a third coaxial cable; and/or the number of the groups of groups,

the output port of the second phase shifter is connected with the input end of the second low mutual coupling unequal power divider through a fourth coaxial cable, the first output end of the second low mutual coupling unequal power divider is connected with the Nth radiating element in the second antenna array through a fifth coaxial cable, and the second output end of the second low mutual coupling unequal power divider is connected with the (n+1) th radiating element in the first antenna array through a sixth coaxial cable.

According to the base station antenna provided by the invention, the third coaxial cable and the sixth coaxial cable are arranged in an intersecting manner.

The low-mutual-coupling unequal power divider and the base station antenna provided by the invention have the advantages that the input end is used for inputting the main signal, the main signal is output through the first output end and the second output end of the first output transmission line and the second output transmission line, the power of the signals output by the first output end and the second output end is different, the power distribution function is completed, meanwhile, the isolation resistors are arranged on the first output end and the second output end, the mutual coupling of the first output end and the second output end can be reduced, and the beam convergence effect is further improved.

Drawings

In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a low cross-coupling unequal power divider provided by the invention;

FIG. 2 is a schematic diagram of power ratio simulation of a low cross-coupling unequal power divider provided by the invention;

fig. 3 is a schematic structural diagram of a base station antenna provided by the present invention;

fig. 4 is a schematic diagram of horizontal bandwidth test data of a base station antenna according to the present invention.

Reference numerals:

1. a dielectric substrate; 101. a bonding pad; 1011. metallizing the via hole; 102. a mounting hole;

2. an input transmission line; 201. an input end;

3. a first output transmission line; 301. a first output terminal;

4. a second output transmission line; 401. a second output terminal;

5. an isolation resistor;

6. a reflection plate;

701. a first phase shifter; 702. a second phase shifter; 703. a spacer;

801. a first antenna array; 802. a second antenna array;

901. a first low cross-coupling unequal power divider; 902. a second low cross-coupling unequal power divider;

10. a radiation unit;

1101. a first coaxial cable; 1102. a second coaxial cable; 1103. a third coaxial cable; 1104. a fourth coaxial cable; 1105. a fifth coaxial cable; 1106. and a sixth coaxial cable.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.

In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

The invention provides a low mutual coupling unequal power divider, which divides signal energy into two paths, so that a first output transmission line 3 and a second output transmission line 4 which are connected in parallel have different output powers, and certain isolation degree is ensured between output ports of the low mutual coupling unequal power divider so as to reduce mutual coupling of a first output end 301 and a second output end 401 and further improve beam convergence effect.

Coupling refers to the process of energy propagation from one medium (e.g., a wire, fiber optic) to another, while low coupling minimizes the dependence of the two media to the minimum possible, and does not allow the two systems to produce strong dependence, thereby ensuring that certain isolation should be ensured between the output ports of the low cross-coupling unequal power splitters.

As shown in fig. 1, the low mutual coupling unequal power divider of the embodiment of the invention includes: the dielectric substrate 1, and an input transmission line 2, a first output transmission line 3, a second output transmission line 4 and an isolation resistor 5 which are arranged on the dielectric substrate 1. In general, the dielectric substrate 1 is a printed circuit board (Printed Circuit Board, abbreviated as PCB), and the PCB has advantages of high density and high reliability, so that the system is miniaturized and light, and signal transmission is faster.

The first output transmission line 3 and the second output transmission line 4 are connected with the input transmission line 2, and the isolation resistor 5 is connected with the first output transmission line 3 and the second output transmission line 4, wherein the transmission line can be a microstrip line, the microstrip line has small volume, light weight and wide use band, and the microstrip line has high reliability and low manufacturing cost, and can effectively transmit high-frequency signals. The transmission line can also adopt a slow wave structure, the slow wave structure has the advantages of low working voltage, wide frequency band, high efficiency, easiness in processing and the like, and meanwhile, the microstrip meander line slow wave structure can be well matched with a solid-state circuit, so that the efficiency of signal transmission is improved.

The input transmission line 2 is provided with an input end 201, the first output transmission line 3 is provided with a first output end 301, the second output transmission line 4 is provided with a second output end 401, the input end 201, the first output end 301 and the second output end 401 are located at the same side edge of the dielectric substrate 1, and the isolation resistor 5 is close to the edge. The input terminal 201, the first output terminal 301, and the second output terminal 401 are sequentially disposed along the length direction of the dielectric substrate 1, or may be sequentially disposed along the width direction of the dielectric substrate 1, where the first output transmission line 3 and the second output transmission line 4 are adjacently disposed.

Since the first output transmission line 3 and the second output transmission line 4 are disposed adjacently, in order to prevent the occurrence of jumping and instability of signal transmission, an isolation resistor 5 is disposed to be connected to the first output transmission line 3 and the second output transmission line 4, i.e., one end of the isolation resistor 5 is connected to the first output transmission line 3 and the other end is connected to the second output transmission line 4, and the isolation resistor 5 is disposed at a position close to the first output terminal 301 and the second output terminal 401. The isolation resistor 5 has an impeding effect on all signals due to the characteristic of the resistor, while increasing the attenuation amount of the signals, and the isolation resistor 5 consumes no power.

Specifically, the isolation resistor 5 is a resistor connected between two circuits, so that a voltage drop exists between the two circuits, a direct short circuit between the two circuits is avoided, when the circuits must be connected and current flows, and the voltages at the two ends of the circuits cannot be equal, the isolation resistor 5 is connected, and the characteristic that the voltage drop exists by the isolation resistor 5 is utilized, so that the voltages at the two ends of the resistor are unequal. When a signal is reflected at the first output terminal 301, a part of the reflected signal power is transmitted to the second output terminal 401 through the isolation resistor 5, and the other part of the reflected signal power is reflected back to the input terminal 201 and redistributed at the branch line, and is retransmitted to the first output terminal 301 and the second output terminal 401, and since the lengths of the impedance transformation lines are quarter wavelengths, the electrical lengths when the reflected signal reaches the second output terminal 401 are 180 degrees different, so that at the second output terminal 401, the signal amplitudes of the first output transmission line 3 and the second output transmission line 4 are equal, opposite in phase, and offset from each other, thereby realizing mutual isolation between the first output terminal 301 and the second output terminal 401.

It will be appreciated that from the isolation resistor 5, each side of the first output transmission line 3 and the second output transmission line 4 is a quarter wavelength, and the signals reach the other end of the isolation resistor 5 after the two quarter wavelengths are taken away, but at this time, the voltages of the signals at the two ends of the isolation resistor 5 are just opposite, and the signals together take away a half wavelength and can be consumed on the isolation resistor 5, so that the purpose of isolation is achieved, thereby reducing the coupling of the first output end 301 and the second output end 401 and further improving the beam convergence effect.

As shown in fig. 2, in the working frequency band, the power ratio of the first output end 301 to the second output end 401 at the low frequency band is close to 1.2:1, and the power ratio of the first output end 301 to the second output end 401 at the high frequency band is close to 4:1, so that it can be seen that the low cross-coupling unequal power divider provided by the embodiment of the invention can realize the effect of different frequency output at different frequency bands.

In the embodiment of the present invention, the input terminal 201 of the input transmission line 2 is used for inputting a main signal, the main signal is output through the first output terminal 301 and the second output terminal 401 of the first output transmission line 3 and the second output transmission line 4, and the power of the signals output by the first output terminal 301 and the second output terminal 401 are different, so as to complete the power distribution function, and meanwhile, the isolation resistors 5 are provided on the first output terminal 301 and the second output terminal 401, so that the mutual coupling between the first output terminal 301 and the second output terminal 401 can be reduced, and the beam convergence effect is further improved.

In an alternative embodiment, as shown in fig. 1, the dielectric substrate 1 is provided with a plurality of pads 101 at an edge, and the plurality of pads 101 are respectively in one-to-one correspondence with the input terminal 201, the first output terminal 301, and the second output terminal 401.

Each pad 101 is provided with a metallized via 1011 and each pad 101 is connected to a ground plane (not shown in the figure) on the dielectric substrate 1 through a corresponding metallized via 1011.

Illustratively, the bonding pad 101 may be a windowed bonding pad, which has the advantages of convenient soldering, easy surface treatment and soldering, and easy processing; the bonding pad 101 can also be a cross bonding pad, and the cross bonding pad can reduce the area of a connecting ground wire, slow down the heat dissipation speed and facilitate welding because the bonding pad 101 needs to be connected with a ground plane.

In an alternative embodiment, as shown in fig. 1, the distance between the isolation resistor 5 and the edge is 18-22 mm or less.

Since the first output terminal 301 and the second output terminal 401 are also disposed at the edge of the dielectric substrate 1, and the isolation resistor 5 needs to be disposed between the first output transmission line 3 and the second output transmission line 4, in order to avoid the isolation resistor 5 being connected in series with the first output terminal 301 and the second output terminal 401 to cause a short circuit, and since the isolation resistor 5 needs to perform an isolation function before the first output transmission line 3 and the second output transmission line 4 output signals, the isolation resistor 5 cannot be separated from the first output terminal 301 and the second output terminal 401 too far, and therefore the isolation resistor 5 should be kept at a certain distance from the edge of the dielectric substrate 1 to improve the stability of the circuit.

In an alternative embodiment, as shown in fig. 1, at least one of a mounting hole 102 and a connector (not shown) is provided on the dielectric substrate 1.

Specifically, in the case where the mounting hole 102 is provided on the dielectric substrate 1, the fastener is inserted through the mounting hole 102 to connect the dielectric substrate 1 to the functional device, where the fastener may be a screw, a stud, a bolt, or the like, and the functional device may be an antenna reflection plate, that is, the dielectric substrate 1 is fixed with the antenna reflection plate by using the screw through the mounting hole 102.

In the case where the dielectric substrate 1 is provided with a connection member, the dielectric substrate 1 is connected to the functional device via the connection member, which may be a metal frame, and the dielectric substrate 1 is fixed to the antenna reflection plate by attaching the metal frame to the peripheral side of the dielectric substrate 1.

In addition, as shown in fig. 3, an embodiment of the present invention further provides a base station antenna, including: the reflecting plate 6, the first phase shifter 701, the second phase shifter 702, the first antenna array 801, the second antenna array 802, and the low mutual coupling unequal power divider described above include a first low mutual coupling unequal power divider 901 and a second low mutual coupling unequal power divider 902.

It should be noted that, the first antenna array 801, the second antenna array 802, the first low-mutual-coupling unequal power divider 901, and the second low-mutual-coupling unequal power divider 902 are all disposed on the same side of the reflecting plate 6 along the width direction or the length direction of the reflecting plate 6, and may be fixed on the reflecting plate 6 by using insulating plastic parts and metal screws. The reflecting plate 6 can improve the sensitivity of the antenna for receiving signals, and can also block and shield other electric waves coming from the back direction, so as to avoid interference, and the reflecting plate 6 is usually composed of an aluminum plate or a PCB.

In order to prevent mutual interference of various antennas and enhance the antenna spacing effect, isolation strips 703 are provided in each of the first phase shifter 701 and the second phase shifter 702. The first phase shifter 701 is disposed on a side of the reflection plate 6 close to the first antenna array 801, and the second phase shifter 702 is disposed on a side of the reflection plate 6 close to the second antenna array 802.

The first antenna array 801 and the second antenna array 802 are disposed side by side on the reflection plate 6, and the first antenna array 801 and the second antenna array 802 include a plurality of radiation units 10. The radiation unit 10 is mainly used for transmission and reception of radio waves. The first low-mutual-coupling unequal power divider 901 is disposed between the nth radiating element 10 and the n+1th radiating element 10 in the first antenna array 801, and the second low-mutual-coupling unequal power divider 902 is disposed between the nth radiating element 10 and the n+1th radiating element 10 in the second antenna array 802.

Specifically, an output port (not shown) of the first phase shifter 701 is connected to the input terminal 201 of the first low cross-coupling unequal power divider 901, the first output terminal 301 of the first low cross-coupling unequal power divider 901 is connected to the nth radiating element 10 in the first antenna array 801, and the second output terminal 401 of the first low cross-coupling unequal power divider 901 is connected to the n+1th radiating element 10 in the second antenna array 802.

The output port of the second phase shifter 702 is connected to the input 201 of the second low cross-coupling unequal power divider 902, the first output 301 of the second low cross-coupling unequal power divider 902 is connected to the nth radiating element 10 in the second antenna array 802, and the second output 401 of the second low cross-coupling unequal power divider 902 is connected to the n+1th radiating element 10 in the first antenna array 801.

As shown in fig. 4, in a wide frequency band, the horizontal beam width of the antenna radiation can be converged to 59 ° to 69 ° by using the first low cross-coupling unequal power divider 901 and the second low cross-coupling unequal power divider 902.

It should be noted that the horizontal beam width refers to an included angle between two directions of reducing the radiation power by 3dB at two sides of the maximum radiation direction in the horizontal direction, and the horizontal beam width is an important parameter commonly used for a base station antenna, so that the purpose of improving the radiation coverage quality of the base station antenna can be achieved by adjusting the horizontal beam width of the base station antenna in a certain range, and the horizontal beam width of the antenna radiation can be converged to 59-69 degrees, so that the base station antenna has a good radiation range, and the service performance of the base station antenna is improved.

In the embodiment of the invention, the base station antenna adopts a cable-stayed array, and a low mutual coupling unequal power divider is arranged on the base station antenna, so that the radiating units 10 in the first antenna array 801 and the second antenna array 802 show unequal power division characteristics of different frequency points, and the beam convergence under the condition of converging broadband is realized on the basis of not increasing the number of the radiating units 10 and the length of the base station antenna.

In an alternative embodiment, first antenna array 801 and second antenna array 802 include M radiating elements 10, M.gtoreq.3, where M-1.gtoreq.N.gtoreq.1. If the number of radiating elements 10 is too small, the performance of the base station antenna will be affected, because the low cross coupling unequal power divider is arranged between two radiating elements 10, and because M-1 is greater than or equal to N is greater than or equal to 1, the nth radiating element 10 is not the first radiating element 10 of the first antenna array 801 or the second antenna array 802.

In an alternative embodiment, as shown in fig. 3, a first low cross-coupling unequal power divider 901 is provided between the nth radiating element 10 and the n+1th radiating element 10 in the first antenna array 801; the second low cross-coupling unequal power divider 902 is disposed between the nth radiating element 10 and the n+1th radiating element 10 in the second antenna array 802.

Since the low cross-coupling unequal power divider is disposed between the nth radiating element 10 and the n+1th radiating element 10, the first low cross-coupling unequal power divider 901 may output signals to the first antenna array 801 and the second antenna array 802, rather than unidirectional only to the first antenna array 801, and similarly, the second low cross-coupling unequal power divider 902 may transmit signals to the first antenna array 801 and the second antenna array 802, rather than only to the second antenna array 802. The arrangement improves the efficiency of signal transmission, and simultaneously, under the condition of not increasing the length of the antenna and the number of the radiating units 10, the structure of the antenna is more compact and small, and the beam convergence effect under the condition of convergence broadband can be achieved.

In an alternative embodiment, as shown in fig. 3, the output port of the first phase shifter 701 is connected to the input terminal 201 of the first low cross-coupling unequal power divider 901 through a first coaxial cable 1101, the first output terminal 301 of the first low cross-coupling unequal power divider 901 is connected to the nth radiating element 10 in the first antenna array 801 through a second coaxial cable 1102, and the second output terminal 401 of the first low cross-coupling unequal power divider 901 is connected to the n+1th radiating element 10 in the second antenna array 802 through a third coaxial cable 1103.

Similarly, the output port of the second phase shifter 702 is connected to the input 201 of the second low cross-coupled unequal power divider 902 through the fourth coaxial cable 1104, the first output 301 of the second low cross-coupled unequal power divider 902 is connected to the nth radiating element 10 in the second antenna array 802 through the fifth coaxial cable 1105, and the second output 401 of the second low cross-coupled unequal power divider 902 is connected to the (n+1) th radiating element 10 in the first antenna array 801 through the sixth coaxial cable 1106.

The following description will take the example that the first output terminal 301 of the first low-mutual-coupling unequal power divider 901 is connected to the nth radiating element 10 in the first antenna array 801 through the second coaxial cable 1102. An inner core of the first end of the second coaxial cable 1102 is connected to the first output terminal 301, and an outer core of the first end of the second coaxial cable 1102 is connected to the pad 101 corresponding to the first output terminal 301.

Coaxial cables are easy to wire and install and have good immunity to electromagnetic interference, the electromagnetic field carrying the signal being present only in the space between the inner and outer conductors, which means that unlike other types of transmission lines, coaxial cables can be installed alongside metallic objects without breaking. In general, the inner conductor of the coaxial cable is connected to the port for transmitting signals, the outer conductor is grounded, when the outer conductor is grounded, the external electric field does not affect the inside, the internal electric field does not affect the outside, the advantage of shielding the internal signal and the external signal from each other is achieved, and the signal quality and the signal transmission rate can be improved.

In an alternative embodiment, the third coaxial cable 1103 and the sixth coaxial cable 1106 are disposed so as to intersect, since the second output 401 of the first low cross-coupling unequal power divider 901 is connected to the n+1 radiating element 10 in the second antenna array 802 through the third coaxial cable 1103, and the second output 401 of the second low cross-coupling unequal power divider 902 is connected to the n+1 radiating element 10 in the first antenna array 801 through the sixth coaxial cable 1106, and since the first low cross-coupling unequal power divider 901 is disposed in the first antenna array 801 and the second low cross-coupling unequal power divider 902 is disposed in the second antenna array 802, it is unavoidable that the third coaxial cable 1103 and the sixth coaxial cable 1106 are connected so as to intersect, thereby optimizing the horizontal plane beam width without increasing the antenna length.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the 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 scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A low cross-coupling unequal power divider, comprising: the device comprises a dielectric substrate, an input transmission line, a first output transmission line, a second output transmission line and an isolation resistor, wherein the input transmission line, the first output transmission line and the second output transmission line are arranged on the dielectric substrate;

2. The low mutual coupling unequal power divider of claim 1, wherein the dielectric substrate is provided with a plurality of bonding pads at the edge, the plurality of bonding pads being in one-to-one correspondence with the input end, the first output end and the second output end, respectively;

3. The low mutual coupling unequal power divider of claim 1, wherein a distance between the isolation resistor and the edge is 18-22 mm or less.

4. The low mutual coupling unequal power divider of claim 1, wherein the dielectric substrate is provided with at least one of a mounting hole and a connector;

5. A base station antenna, comprising: a reflector, a first phase shifter, a second phase shifter, a first antenna array, a second antenna array, and a low cross-coupling unequal power divider according to any one of claims 1 to 4, the low cross-coupling unequal power divider comprising a first low cross-coupling unequal power divider and a second low cross-coupling unequal power divider;

6. The base station antenna of claim 5, wherein the first antenna array and the second antenna array comprise M radiating elements, M being ≡3;

wherein M-1 is greater than or equal to N is greater than or equal to 1.

7. The base station antenna of claim 5, wherein the first low cross-coupling unequal power divider is disposed between an nth radiating element and an n+1th radiating element in the first antenna array;

8. The base station antenna of claim 5, wherein the output port of the first phase shifter is connected to the input of the first low cross-coupling unequal power divider by a first coaxial cable, the first output of the first low cross-coupling unequal power divider is connected to the nth radiating element in the first antenna array by a second coaxial cable, and the second output of the first low coupling unequal power divider is connected to the (n+1) th radiating element in the second antenna array by a third coaxial cable; and/or the number of the groups of groups,

9. The base station antenna of claim 8, wherein the third coaxial cable and the sixth coaxial cable are disposed to intersect.