CN109378592A - A Wideband Antenna Array Feed Network with Stable Beamwidth and Low Sidelobes - Google Patents

A Wideband Antenna Array Feed Network with Stable Beamwidth and Low Sidelobes Download PDF

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Publication number
CN109378592A
CN109378592A CN201811357566.4A CN201811357566A CN109378592A CN 109378592 A CN109378592 A CN 109378592A CN 201811357566 A CN201811357566 A CN 201811357566A CN 109378592 A CN109378592 A CN 109378592A
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conductor layer
dielectric substrate
output port
output
stable
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CN109378592B (en
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陈付昌
陈继鹏
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South China University of Technology SCUT
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South China University of Technology SCUT
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/0006—Particular feeding systems
    • 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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  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

本发明公开了一种具有稳定波束宽度和低副瓣的宽带天线阵列馈电网络，包括从上往下排布的第一、二、三介质基板，第一介质基板上表面和第三介质基板下表面设有地板，第一介质基板下表面和第三介质基板上表面分别设有第一、二导体层，第一、二导体层上的一部分微带传输线均形成为移相器，第一导体层上的一部分微带传输线形成为功分器，第一、二导体层上的其余微带传输线与第二介质基板一起构成有两个频率选择电路，第一导体层连接有输入端口和第三输出端口，第二导体层连接有第一、二、四、五输出端口。本发明实现了辐射波束具有低副瓣的特点，实现很好的带宽特性，辐射方向稳定，具有设计简单、性能稳定、成本低等优点。

The invention discloses a broadband antenna array feeding network with stable beam width and low side lobes, comprising first, second and third dielectric substrates arranged from top to bottom, an upper surface of the first dielectric substrate and a third dielectric substrate The lower surface is provided with a floor, the lower surface of the first dielectric substrate and the upper surface of the third dielectric substrate are respectively provided with first and second conductor layers, part of the microstrip transmission lines on the first and second conductor layers are formed as phase shifters, the first A part of the microstrip transmission line on the conductor layer is formed as a power divider, and the remaining microstrip transmission lines on the first and second conductor layers together with the second dielectric substrate form two frequency selection circuits, the first conductor layer is connected with the input port and the second frequency selection circuit. Three output ports, the second conductor layer is connected with the first, second, fourth and fifth output ports. The invention realizes that the radiation beam has the characteristics of low side lobes, realizes good bandwidth characteristics, stable radiation direction, and has the advantages of simple design, stable performance, low cost and the like.

Description

It is a kind of with the broad-band antenna array feeding network for stablizing beam angle and Sidelobe
Technical field
The present invention relates to the technical fields of antenna feed, refer in particular to a kind of with the width for stablizing beam angle and Sidelobe Band aerial array feeding network.
Background technique
Due to the high speed development wirelessly communicated in recent years, either the universal of 4G technology, Internet of Things it is burning hot or 5G At hand, it all indicates wireless technology and a booming peak period will be welcome.On the other hand, with electronic information It grows rapidly, requirement of the people for communication quality is higher and higher, such as higher frequency bandwidth, relatively narrow and constant wave beam are wide Degree and lower minor-lobe radiation.The technology solved these problems at present is mainly to develop the antenna and antenna of various performances Feeding network, therefore the research of antenna feeding network becomes one of hot spot in recent years.
Current realization broadband is more commonly used, and also eaily method is to utilize the device such as 3dB with broadband character Coupler and power splitter etc.；And realizing the common method of the lower minor-lobe radiation of aerial array is to make the amplitude of output port in cone Shape distribution, centre is higher and both sides are lower.
2016, Krzysztof Wincza et al. existed " IEEE Transactions On Antenna and Propagation " on deliver entitled " Broadband Scalable Antenna Arrays With Constant Beamwidths Fed by Frequency-Selective Networks ", using trilaminate stack structure, realizing has width The three-dB coupler of frequency band, using one in f0To 2f0Between have the circuit of frequency selective characteristic, constitute one and have and stablize wave beam The broadband feeding network of width, but the minor-lobe radiation of the structure is relatively high, especially in low frequency and high frequency.
Summary of the invention
The purpose of the present invention is to overcome the shortcomings of the existing technology with it is insufficient, propose it is a kind of have stablize beam angle and The broad-band antenna array feeding network of Sidelobe, the feeding network do not wait power splitters to realize 5 using in input terminal application Taper amplitude distribution between a output port realizes good band so that realizing radiation beam has the characteristics that Sidelobe Wide characteristic, radiation direction are stablized, and have many advantages, such as that design is simple, performance is stable, at low cost.
To achieve the above object, technical solution provided by the present invention are as follows: one kind, which has, stablizes beam angle and Sidelobe Broad-band antenna array feeding network, include three medium substrates that are parallel to each other and arranging from top to bottom, respectively first The upper surface of medium substrate, second medium substrate and third medium substrate, the first medium substrate is formed with the first floor, Lower surface is formed with the first conductor layer, and the upper surface of the third medium substrate is formed with the second conductor layer, and lower surface is formed There is the second floor, a part of microstrip transmission line in first conductor layer and the second conductor layer is all formed as phase shifter, described A part of microstrip transmission line in first conductor layer is formed as power splitter, remaining in first conductor layer and the second conductor layer Microstrip transmission line is constituted together with the second medium substrate being clipped in the middle there are two symmetrical frequency selective network, and described the One conductor layer is connected with input port and third output port, and second conductor layer is connected with the first output port, second defeated Exit port, the 4th output port and the 5th output port, and all output ports divide in different frequencies with different signals Cloth, to obtain broader working frequency range and stable radiation beam.
Further, the power splitter is cross-shaped structure, when signal is inputted from input port, the power of both sides output port It is identical, and the power of intermediate output mouth is the sum of both sides output power.
Further, the frequency selective network is made of two 3-dB directional couplers and two low-pass filters, wherein Two low-pass filters are located between two 3-dB directional couplers, and connect respectively with two 3-dB directional couplers.
Compared with prior art, the present invention have the following advantages that with the utility model has the advantages that
1, this feeding network is realized has stable radiation beam width and low sidelobe in broadband, and in passband Impedance matching is good.
2, this feeding network is made of three-decker, and coupler is easy to get the high degree of coupling to generating wider bandwidth, And it is easy debugging.
3, this feeding network is improved based on existing broadband feeding network, does not add additional device, structure is simply bright ?.
4, this feeding network compact overall structure, the processing is simple, light-weight, and processing cost is low, before having application well Scape.
Detailed description of the invention
Fig. 1 is feed network structures diagrammatic cross-section of the present invention.
Fig. 2 is feed network structures trace-diagram of the present invention.
Fig. 3 is power divider structure and its transmission characteristic figure used in feeding network of the present invention.
Fig. 4 is frequency selective network structure and its transmission characteristic figure used in feeding network of the present invention.
Fig. 5 is feeding network global transport figure of the present invention.
Fig. 6 is the antenna array radiation directional diagram comparing result of feeding network improvement front and back.
Specific embodiment
The present invention is further explained in the light of specific embodiments.
Referring to figure 1 and figure 2, there are the wide bandwidth antenna arrays for stablizing beam angle and Sidelobe provided by the present embodiment Column feeding network includes three medium substrates that are parallel to each other and arranging from top to bottom, respectively first medium substrate 16, Second medium substrate 17 and third medium substrate 18；The upper surface of the first medium substrate 16 is formed with the first floor 15, under Surface is formed with the first conductor layer 20, and the upper surface of the third medium substrate 18 is formed with the second conductor layer 21, lower surface It is formed with the second floor 19, a part of microstrip transmission line in first conductor layer 15 and the second conductor layer 16 is all formed as moving Phase device 10,11,12,13,14, a part of microstrip transmission line in first conductor layer 20 are formed as power splitter 7, and described first Remaining microstrip transmission line in conductor layer 20 and the second conductor layer 21 is constituted together with the second medium substrate 17 being clipped in the middle to be had Two symmetrical frequency selective networks 8,9, first conductor layer 20 are connected with input port 1 and third output port 4, Second conductor layer 21 is connected with the first output port 2, second output terminal mouth 3, the 4th output port 5 and the 5th output port 6, and all output ports have different signal distributions in different frequencies, to obtain broader working frequency range and stable Radiation beam.
The power divider structure is shown in Figure 3, is cross-shaped structure, when signal is inputted from input port, both sides output The power of port is identical, and the power of intermediate output mouth is the sum of both sides output power.
The structure of the frequency selective network is shown in Figure 4, by two 3-dB directional couplers and two low-pass filtering Device composition, two low-pass filters are located between two 3-dB directional couplers, and respectively with two 3-dB directional couplers Connection.It is the output port that signal is output to the right that its characteristic, which is in high frequency, and is the output that signal is output to the left side in low frequency Port, transmission characteristic seamlessly transits when intermediate frequency.
The input port of the power splitter 7 connects the input port 1 of entire feeding network, and the right and left of power splitter 7 is defeated Exit port is separately connected two frequency selective networks 8 and 9, lower left corner port and the frequency selective network 9 of frequency selective network 8 Lower right corner port all connects the impedance matching of 50 Ω, and two output ports of frequency selective network 8 are distinguished by phase shifter 10,11 The first output port 2, second output terminal mouth 3 are connected, two output ports of frequency selective network 9 pass through 13,14 points of phase shifter Not Lian Jie the 4th output port 5, the 5th output port 6, it is defeated that the intermediate output of power splitter 7 by 12 port of phase shifter connects third Exit port 4.Phase shifter is made of 50 Ω impedance micro-strips of different length, the different length of microstrip line meet output port it Between condition of the phase difference near 0 °.
Input port 1, the first output port 2, second output terminal mouth 3, third output port 4, the 4th output port 5 and 5th output port 6 is the microstrip line of 50 Ω impedances.The permittivity ε of first medium substrate 11 and third medium substrate 13r =2.55, loss angle tangent 0.0029, thickness h1=1.5 millimeters, 12 permittivity ε of second medium substrater=2.55, Loss angle tangent is 0.0029, thickness h2=0.25 millimeter.
It is shown in Figure 5, it is shown that the simulation result of the above-mentioned feeding network configured transmission of the present embodiment, wherein figure (a) is Amplitude distribution figure, figure (b) are phase difference Butut.The distribution of S61 is identical as S21, and the distribution of S51 is identical as S31's.From figure It can be seen that S11 is respectively less than -20dB in working band 2GHz to 4GHz, good impedance matching is realized.In low frequency Signal is mainly distributed on output port 2, output port 4 and output port 6, and the power of output port 6 is output port 2 and 4 Twice, the phase difference between output port 2,4,6 is near 0 °；In high frequency, signal is mainly distributed on output port 3, output Port 4 and output port 5, and the power of output port 4 is twice of output port 3 and 5, the phase between output port 3,4,5 Potential difference is near 0 °.It seamlessly transits, has been achieved in wide working band with stable in intermediate bands transmission characteristic Radiation beam width and low minor level.
It is shown in Figure 6, it is shown that the output port of the above-mentioned feeding network of the present embodiment connects 5 a period of time dipole array antenna meters The antenna pattern of calculating, wherein between antenna array elements between be divided into low frequency f0When vacuum in 1/3 wavelength.Scheming (a) is Antenna pattern before improvement, figure (b) are the antenna pattern after improvement, it can be seen that it is wide both to realize stable wave beam Degree, but the former minor level is higher, and the latter's minor level reaches -15dB or less.
In conclusion the present invention is dropped using the amplitude for not waiting power splitters reasonable distribution feeding network output port with reaching The minor level of low antenna array radiation has flexible design, small in size, at low cost, stable output signal, and output signal pair The small feature of valve level has practical application value, is worthy to be popularized.
Embodiment described above is only the preferred embodiments of the invention, and but not intended to limit the scope of the present invention, therefore All shapes according to the present invention change made by principle, should all be included within the scope of protection of the present invention.

Claims (3)

1.一种具有稳定波束宽度和低副瓣的宽带天线阵列馈电网络，其特征在于：包括有彼此平行且从上往下排布的三个介质基板，分别为第一介质基板、第二介质基板和第三介质基板，所述第一介质基板的上表面形成有第一地板，其下表面形成有第一导体层，所述第三介质基板的上表面形成有第二导体层，其下表面形成有第二地板，所述第一导体层和第二导体层上的一部分微带传输线均形成为移相器，所述第一导体层上的一部分微带传输线形成为功分器，所述第一导体层和第二导体层上的其余微带传输线与夹在中间的第二介质基板一起构成有两个相互对称的频率选择电路，所述第一导体层连接有输入端口和第三输出端口，所述第二导体层连接有第一输出端口、第二输出端口、第四输出端口和第五输出端口，且所有输出端口在不同的频率具有不同的信号分布，以获得更宽的工作频段以及稳定的辐射波束。1. A broadband antenna array feeding network with stable beam width and low side lobes, characterized in that: comprising three dielectric substrates parallel to each other and arranged from top to bottom, respectively a first dielectric substrate, a second dielectric substrate A dielectric substrate and a third dielectric substrate, a first floor is formed on the upper surface of the first dielectric substrate, a first conductor layer is formed on the lower surface, and a second conductor layer is formed on the upper surface of the third dielectric substrate, which A second floor is formed on the lower surface, the first conductor layer and a part of the microstrip transmission line on the second conductor layer are both formed as phase shifters, and a part of the microstrip transmission line on the first conductor layer is formed as a power divider, The remaining microstrip transmission lines on the first conductor layer and the second conductor layer, together with the second dielectric substrate sandwiched in the middle, constitute two mutually symmetrical frequency selection circuits, and the first conductor layer is connected with the input port and the first conductor layer. Three output ports, the second conductor layer is connected with a first output port, a second output port, a fourth output port and a fifth output port, and all the output ports have different signal distributions at different frequencies to obtain wider working frequency band and stable radiation beam. 2.根据权利要求1所述的一种具有稳定波束宽度和低副瓣的宽带天线阵列馈电网络，其特征在于：所述功分器为十字形结构，信号从输入端口输入时，两边输出端口的功率相同，且中间输出端口的功率为两边输出功率之和。2. a kind of broadband antenna array feeding network with stable beam width and low side lobe according to claim 1, is characterized in that: described power divider is a cross-shaped structure, and when signal is input from input port, both sides output The power of the ports is the same, and the power of the middle output port is the sum of the output power of both sides. 3.根据权利要求1所述的一种具有稳定波束宽度和低副瓣的宽带天线阵列馈电网络，其特征在于：所述频率选择电路由两个3‐dB定向耦合器和两个低通滤波器组成，其中，两个低通滤波器位于两个3‐dB定向耦合器之间，并分别与该两个3‐dB定向耦合器连接。3. A broadband antenna array feed network with stable beam width and low side lobes according to claim 1, wherein the frequency selection circuit consists of two 3-dB directional couplers and two low-pass The filter consists of two low-pass filters located between two 3-dB directional couplers and connected to the two 3-dB directional couplers, respectively.
CN201811357566.4A 2018-11-15 2018-11-15 A broadband antenna array feed network with stable beamwidth and low side lobes Expired - Fee Related CN109378592B (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111416214A (en) * 2020-04-22 2020-07-14 成都多普勒科技有限公司 A high-gain millimeter-wave radar antenna with a wide horizontal field of view
WO2020228402A1 (en) * 2019-05-10 2020-11-19 华南理工大学 Filtering, power-dividing and phase-shifting integrated antenna array feed network

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Publication number Priority date Publication date Assignee Title
CN101719599A (en) * 2009-12-31 2010-06-02 天津工程师范学院 Array antenna of circularly polarized dielectric resonator
CN107482320A (en) * 2017-07-31 2017-12-15 武汉虹信通信技术有限责任公司 A kind of 5G large scale arrays antenna
CN207559072U (en) * 2017-12-20 2018-06-29 京信通信系统（中国）有限公司 A kind of 2 × 3 wideband butler matrix plates, butler matrix and multibeam antenna

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101719599A (en) * 2009-12-31 2010-06-02 天津工程师范学院 Array antenna of circularly polarized dielectric resonator
CN107482320A (en) * 2017-07-31 2017-12-15 武汉虹信通信技术有限责任公司 A kind of 5G large scale arrays antenna
CN207559072U (en) * 2017-12-20 2018-06-29 京信通信系统（中国）有限公司 A kind of 2 × 3 wideband butler matrix plates, butler matrix and multibeam antenna

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020228402A1 (en) * 2019-05-10 2020-11-19 华南理工大学 Filtering, power-dividing and phase-shifting integrated antenna array feed network
US11450951B2 (en) 2019-05-10 2022-09-20 South China University Of Technology Filtering, power-dividing and phase-shifting integrated antenna array feed network
CN111416214A (en) * 2020-04-22 2020-07-14 成都多普勒科技有限公司 A high-gain millimeter-wave radar antenna with a wide horizontal field of view

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