CN208849074U - Velocity radar antenna - Google Patents
Velocity radar antenna Download PDFInfo
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- CN208849074U CN208849074U CN201821489835.8U CN201821489835U CN208849074U CN 208849074 U CN208849074 U CN 208849074U CN 201821489835 U CN201821489835 U CN 201821489835U CN 208849074 U CN208849074 U CN 208849074U
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- power division
- division network
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- microstrip line
- radiant section
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Abstract
The utility model provides a kind of velocity radar antenna, comprising: two 4 × 8 series feed structures being made of microband antenna unit, two series feed symmetrical configurations are arranged and use Taylor's distribution form；Further include: the power division network for connecting microband antenna unit, power division network include: one point of eight power division network and one point of four power division network connecting one point of eight power division network.Guarantee the size that sidelobe level and main lobe field angle are taken into account while the raising of antenna gain, the effective directionality for improving antenna simultaneously, there is good directiveness for the design of directional aerial, high-gain aerial makes radar system that can work in measurement relatively far away from apart from interior, and influence of the surrounding enviroment to system is reduced, so that the accuracy of radar system can be greatly improved.
Description
Technical field
The utility model belongs to Radar Technology field more particularly to a kind of velocity radar antenna.
Background technique
Radar velocity measurement is mainly the section for measuring the water flows such as river by non-contacting method according to Doppler effect
Flow velocity and flow, antenna are played an important role as microwave energy receive-transmit system.Antenna is divided into transmitting-receiving two parts, receiving antenna
It is mainly used for receiving the signal strength that microwave energy reflective is returned, for the judgment basis as water speed, transmitting antenna is used for will
The energy transmitting of radar system is gone out, wherein transmitting-receiving two parts are using identical structure.Current velocity radar antenna is main
Using array antenna mode, array antenna is made of mutiple antennas radiating element, can effectively improve the gain of antenna, but
It will increase the secondary lobe of antenna radiation pattern simultaneously, to influence the accuracy of radar system measurement, or even cause whole system in spy
It can not work normally under different environment.
Summary of the invention
In order to solve the above technical problems, the utility model provides a kind of velocity radar antenna.For the embodiment to disclosure
Some aspects have a basic understanding, simple summary is shown below.The summarized section is not extensive overview, nor
It determines key/critical component or describes the protection scope of these embodiments.Its sole purpose is to be in simple form
Existing some concepts, in this, as the preamble of following detailed description.
The utility model adopts the following technical solution:
In some alternative embodiments, a kind of velocity radar antenna is provided, comprising: two are made of microband antenna unit
4 × 8 series feed structures, two series feed symmetrical configurations settings and use Taylor's distribution form；Further include: microband antenna unit is connected
The power division network come is picked up, the power division network includes: one point of eight power division network and connects one point of eight power division network
One point of four power division network come；One point of eight power division network uses bilateral symmetry, comprising: quarter-wave micro-strip
It turns at the edge of the microstrip line of line and half wavelength, the quarter-wave microstrip line at one point of eight power division network both ends
Corner cut is set at angle；One point of four power division network is made of quarter-wave microstrip line.
In some alternative embodiments, the microband antenna unit is divided into three layers, and top layer is the irradiation unit of metal material
Point, middle layer is dielectric layer, and bottom is the grounded part of metal material.
In some alternative embodiments, the radiant section is the rectangular configuration of 3.8mm × 3.04mm；The irradiation unit
Rectangular notch is opened up on point, draws microstrip line in the rectangular notch, the microstrip line is located at the part in the rectangular notch
Gap is formed between radiant section.
In some alternative embodiments, the end of the microstrip line of the radiant section is as feed mouth and described one point eight
Power division network connection.
In some alternative embodiments, the radiant section be arranged in the dielectric layer top surface with a thickness of
The metallic copper of 0.14mil；By the way that the back side of the dielectric layer is paved with the copper with a thickness of 0.14mil all to form the ground connection
Part.
In some alternative embodiments, the dielectric layer is selected as Rogers 4350B, and with a thickness of 20mil, opposite dielectric is normal
Number is 3.48.
The utility model has the advantages that guaranteeing to take into account sidelobe level and main lobe while the raising of antenna gain brought by the utility model
The size of field angle, while the effective directionality for improving antenna have good directiveness for the design of directional aerial, high
Gain antenna makes radar system that can work in measurement relatively far away from apart from interior, and reduces surrounding enviroment to the shadow of system
It rings, so that the accuracy of radar system can be greatly improved.
For the above and related purposes, one or more embodiments include being particularly described below and in claim
In the feature that particularly points out.Certain illustrative aspects are described in detail in the following description and the annexed drawings, and its instruction is only
Some modes in the utilizable various modes of the principle of each embodiment.Other benefits and novel features will be under
The detailed description in face is considered in conjunction with the accompanying and becomes obvious, the disclosed embodiments be all such aspects to be included and they
Be equal.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model velocity radar antenna；
Fig. 2 is the structural schematic diagram that the utility model one divides eight power division networks；
Fig. 3 is the structural schematic diagram that the utility model one divides four power division networks；
Fig. 4 is the structural schematic diagram of the utility model microband antenna unit；
Fig. 5 is the main view of the utility model microband antenna unit.
Specific embodiment
The following description and drawings fully show specific embodiments of the present invention, to enable those skilled in the art to
Practice them.Other embodiments may include structure, logic, it is electrical, process and other change.Embodiment
Only represent possible variation.Unless explicitly requested, otherwise individual components and functionality is optional, and the sequence operated can be with
Variation.The part of some embodiments and feature can be included in or replace part and the feature of other embodiments.This hair
The range of bright embodiment includes equivalent obtained by the entire scope of claims and all of claims
Object.
As shown in Figure 1, in some illustrative embodiments, a kind of velocity radar antenna is provided, using by microstrip antenna
The array structure that unit 1 forms.
As shown in Figure 4 and Figure 5, it is three layers that microband antenna unit 1, which divides, and top layer is the radiant section 2 of metal material, middle layer
For dielectric layer 3, bottom is the grounded part 4 of metal material.Dielectric layer 3 is selected as Rogers 4350B, with a thickness of 20mil, relatively
Dielectric constant is 3.48；Radiant section 2 is the metallic copper with a thickness of 0.14mil that 3 top surface of dielectric layer is arranged in, as antenna
Radiant section goes out microwave energy；By the way that the back side of dielectric layer 3 is paved with the copper with a thickness of 0.14mil all with shape
At grounded part 4, the size and dielectric layer 3 of copper are in the same size.
Radiant section 2 is the rectangular configuration of 3.8mm × 3.04mm.Rectangular notch 5, rectangular notch 5 are opened up on radiant section 2
Interior extraction microstrip line 6, microstrip line 6 are located at the part in rectangular notch 5 and form gap 7 between radiant section 2.Radiant section 2
Microstrip line 6 end as feed mouth 8 connect with one point of eight power division network 9.Wherein, a length of 3.04mm of radiant section 2,
Determine the resonance frequency of microband antenna unit 1, the i.e. working frequency of antenna system, the width of radiant section 2 is 3.8mm, can be with
Adjust the impedance of antenna.Microstrip line 6 is responsible for carrying out the transmission of energy to the radiant section 2 of microband antenna unit 1, micro- by adjusting
Width with line 6 and gap 7, the impedance of adjustable microband antenna unit 1 make to reach at the feed mouth 8 of microband antenna unit 1
The reflection of energy at port is reduced to impedance matching, improves radar system efficiency.
The dielectric layer 3 of each microband antenna unit 1 constitutes a monolith medium substrate, the ground connection of each microband antenna unit 1
Part 4 constitutes the attached copper metal layer that a monolith is located at the medium substrate back side.
As shown in Figures 1 to 3, the velocity radar antenna of the utility model, comprising: two be made of microband antenna unit 14
× 8 series feed structures, two series feed symmetrical configurations are arranged and use Taylor's distribution form, and Taylor's distribution form is available higher
Gain, and guarantee that field angle is met the requirements.Wherein eight lateral microband antenna units 1 are symmetrical series feed structures,
It is one one point eight of centimetre structure, longitudinal is one one point four of series feed function separation structure.
Microband antenna unit 1 is connected by power division network, and power division network includes: one point of eight power division network 9 and by one point
One point of four power division network 10 that eight power division networks 9 connect.One point of eight power division network 9 uses bilateral symmetry, intermediate
Dot indicates feeding point, and consideration is pad size at feed so being added to round metal；One point of eight power division network 9 wraps
It includes: the microstrip line B of quarter-wave microstrip line A and half wavelength, a quarter at one point of eight power division network both ends
Corner cut 11 is set at the edge-corner of the microstrip line of wavelength.One point of four power division network 10 is by quarter-wave microstrip line A group
At intermediate origin indicates the pad size of feeding point, and one point of four power division network 10 is entirely quarter-wave micro-strip
The structure of line A, the width of the impedance line of adjusting reach the impedance matching of port.
Series feed structure 1 array of microband antenna unit can be made compact and it is opposite design relatively simple, relatively and present structure and have
Relatively low sidelobe level, but there is relatively narrow bandwidth of operation.Power division network is mainly the different resistances for designing every section of load
Anti- value makes the level of output reach the power ratio of requirement, and by the thickness of dielectric layer 3, opposite dielectric is normal for the impedance of microstrip line 6 itself
Several and microstrip line 6 width codetermines.
The design of power division network is mainly using the microstrip line B of quarter-wave microstrip line A and half wavelength, and two
The microstrip line of kind wavelength is the impedance in order to adjust the output port of power division network, need to need adopt to determine according to the calculating of impedance
With which kind of structure.Meet according to quarter-wave impedance transformation line impedence:
Wherein Z0For quarter-wave micro-strip line impedance value, ZLFor the impedance value of load, ZinFor the impedance of input section
It is worth size.And impedance can obtain identical impedance value after the microstrip line of half wavelength.One point of eight power division network both ends
Edge-corner at corner cut 11 is set, increase the coupling between microstrip line and ground, to influence impedance value herein, therefore at edge
Place devises corner cut 11, so that the mutation of area will not be caused, wavelength herein is the propagation wavelength X of electromagnetic wave in the mediumg,
C is the light velocity, and f is working frequency, εeFor the relative dielectric constant of dielectric layer, the following formula of the relationship of three:
The velocity radar antenna of the utility model use go here and there and the structure presented taken into account the beamwidth of antenna and loss two because
Element, series feed structural volume is small, and one point of eight power division network 9 uses bilateral symmetry, and symmetrical structure belongs to and present structure,
Such feeding network is relatively complete and presents relatively simple for structure, and presents the bandwidth of structure compared to completely series feed fabric bandwidths meeting
Increase.Array structure improves the gain of antenna, guarantees that antenna transmission and received signal distance increase, low sidelobe can reduce surrounding
Influence of the environment to antenna performance.Therefore, there is very big promotion to the operating distance of existing product, meanwhile, meeting operating distance
Under the premise of reduce product power consumption, this is for when the solar-powered equipment in field greatly improves effective work
Between.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, the change made under other any spiritual essence and principles without departing from the utility model are modified, substitution,
Combination simplifies, should be equivalent substitute mode, all should include within the protection scope of the present utility model.
Claims (6)
1. velocity radar antenna characterized by comprising two 4 × 8 series feed structures being made of microband antenna unit, two
Series feed symmetrical configuration is arranged and uses Taylor's distribution form；Further include: the power division network for connecting microband antenna unit, institute
State one point of four power division network that power division network includes: one point of eight power division network and connects one point of eight power division network；
One point of eight power division network uses bilateral symmetry, comprising: quarter-wave microstrip line and half wavelength
Corner cut is arranged at the edge-corner of the quarter-wave microstrip line at one point of eight power division network both ends for microstrip line；It is described
One point of four power division network is made of quarter-wave microstrip line.
2. velocity radar antenna according to claim 1, which is characterized in that the microband antenna unit is divided into three layers, top
Layer is the radiant section of metal material, and middle layer is dielectric layer, and bottom is the grounded part of metal material.
3. velocity radar antenna according to claim 2, which is characterized in that the radiant section is 3.8mm × 3.04mm
Rectangular configuration；Rectangular notch is opened up on the radiant section, draws microstrip line in the rectangular notch, the microstrip line is located at
Gap is formed between part and radiant section in the rectangular notch.
4. velocity radar antenna according to claim 3, which is characterized in that make the end of the microstrip line of the radiant section
It is connect for feed mouth with one point of eight power division network.
5. velocity radar antenna according to claim 4, which is characterized in that the radiant section is to be arranged in the medium
The metallic copper with a thickness of 0.14mil of layer top surface；By the way that the back side of the dielectric layer to be all paved with to the copper with a thickness of 0.14mil
To form the grounded part.
6. velocity radar antenna according to claim 5, which is characterized in that the dielectric layer is selected as Rogers 4350B, thick
Degree is 20mil, relative dielectric constant 3.48.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821489835.8U CN208849074U (en) | 2018-09-12 | 2018-09-12 | Velocity radar antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821489835.8U CN208849074U (en) | 2018-09-12 | 2018-09-12 | Velocity radar antenna |
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| Publication Number | Publication Date |
|---|---|
| CN208849074U true CN208849074U (en) | 2019-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821489835.8U Active CN208849074U (en) | 2018-09-12 | 2018-09-12 | Velocity radar antenna |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787076A (en) * | 2019-11-06 | 2021-05-11 | 华为技术有限公司 | Antenna structure, radar and terminal |
| CN114583473A (en) * | 2022-05-05 | 2022-06-03 | 西安星通通信科技有限公司 | Beam forming phased array antenna system and design method thereof |
-
2018
- 2018-09-12 CN CN201821489835.8U patent/CN208849074U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112787076A (en) * | 2019-11-06 | 2021-05-11 | 华为技术有限公司 | Antenna structure, radar and terminal |
| CN114583473A (en) * | 2022-05-05 | 2022-06-03 | 西安星通通信科技有限公司 | Beam forming phased array antenna system and design method thereof |
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