CN109638425A - Small wide frequency wide-beam carries on the back chamber plane Monobrachial spiral antenna - Google Patents
Small wide frequency wide-beam carries on the back chamber plane Monobrachial spiral antenna Download PDFInfo
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- CN109638425A CN109638425A CN201811575157.1A CN201811575157A CN109638425A CN 109638425 A CN109638425 A CN 109638425A CN 201811575157 A CN201811575157 A CN 201811575157A CN 109638425 A CN109638425 A CN 109638425A
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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
- H01Q1/362—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith for broadside radiating helical 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
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/28—Adaptation for use in or on aircraft, missiles, satellites, or balloons
- H01Q1/285—Aircraft wire 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
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/32—Adaptation for use in or on road or rail vehicles
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/34—Adaptation for use in or on ships, submarines, buoys or torpedoes
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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
- H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
- H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
- H01Q19/104—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces using a substantially flat reflector for deflecting the radiated beam, e.g. periscopic antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/06—Details
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/16—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole
- H01Q9/26—Resonant antennas with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength
- H01Q9/27—Spiral antennas
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Abstract
The invention belongs to wireless communication technology fields, disclose a kind of small wide frequency wide-beam back chamber plane Monobrachial spiral antenna；It is provided with radiation substrate, metal back chamber, metal frustum and metal base plate；Radiation substrate is located at the top layer of plane Monobrachial spiral antenna；Metal back chamber and metal frustum are located at plane Monobrachial spiral antenna middle layer；Metal base plate is located at the lowest level of plane Monobrachial spiral antenna.The present invention carries on the back the structure and Chip-R of chamber, metal frustum using metal；The broad beam characteristic and broadband character for realizing antenna simultaneously, solve the technical problem of conventional circular polarization antenna.The present invention is guaranteeing that antenna is high performance simultaneously, can utmostly reduce influence of the antenna to the shape and aerodynamics index of carrier.In addition, inventive antenna technology can also be used for spaceborne and airborne synthetic aperture phased array unit, help to obtain high performance phased-array antenna.
Description
Technical field
The invention belongs to wireless communication technology fields more particularly to a kind of small wide frequency wide-beam to carry on the back chamber plane single armed spiral shell
Revolve antenna.
Background technique
Currently, the prior art commonly used in the trade is such that circular polarized antenna is widely used in mobile communication field.Entelechy
The characteristics of changing antenna specifically includes that (1) polarization loss is small, for the communication equipment unstable for operating attitude, using line pole
Change and may cause the polarization mismatch of dual-mode antenna, reduce the communication efficiency of system, and circular polarized antenna in addition to derotation to entelechy
Changing antenna has outside polarization isolation, can then effectively reduce polarization loss for most of any poliarizing antennas；It (2) can be effective
Eliminate the distortion effects that polarize as caused by the Faraday rotation effect of ionosphere；(3) rain and fog weather can be reduced to communication system
Interference.
It is general to require transmitting and receive system in order in microwave and above band, emit and receive faint electromagnetic signal
The antenna of system has wider circularly polarised wave beam width, and is able to maintain certain low elevation gain.It applies in mobile communication system
Relatively broad wide beam circular polarized antenna is mainly micro-strip circular polarized antenna and stereo spiral antenna.Microstrip antenna is a kind of small
Type antenna has low section, and simultaneously circular polarisation may be implemented in easy processing, but its narrower bandwidth, be lost it is larger, even if bandwidth can be with
Improved by different modes, but structure also becomes relative complex；Stereo spiral antenna has bipyramid spiral, four arm spirals etc.,
With wider circular polarization radiation wave beam, higher gain can be kept in lower elevation location, but its narrower bandwidth,
Axial physical size is big, and feed network structures are complicated, and to requirement on machining accuracy height, and the cost is higher.
In technical field of radio, the broad beam requirement of circular polarized antenna is critically important technical indicator, to adapt to work as
The demand of preceding high-speed high capacity communication, it is development trend that circular polarized antenna, which has broad beam,.The greatest irradiation direction of general antenna
Positioned at zenith direction, with the increase of irradiating angle, the gain of antenna will decline, and low elevation gain will be very low, thus day
The beam angle of line narrows.At the same time, the physical size of beam angle and antenna be again in inverse proportionality characteristics, under certain size,
Wider frequency bandwidth characteristics are kept, and how to realize that the broad beam characteristic of circular polarized antenna is that wireless communication field is urgently to be solved
Problem.
The low elevation direction gain decline that wave beam is relatively narrow to make antenna is obvious, when being applied to array scanning, scanning angle compared with
Narrow (general plane battle array scanning angle is at 60 ° or less), system requirements are not achieved in scanning range.It, can applied to naval vessel or earth station
Low elevation gain is improved by the way of multi-panel battle array, but increases use cost using more secondary phased array antenna；For missile-borne, machine
Phased array is carried, weight, volume and mounting area etc. are all restricted, and the phased array of the relatively narrow antenna composition of wave beam reaches completely
Less than system requirements.Therefore it improves the low elevation direction gain of array element as far as possible in the limited situation of array scale, broadens
The beam angle of unit is particularly important.
In conclusion problem of the existing technology is: being restricted in mobile communication in antenna height, size limits
When, under the premise of keeping broadband character, the relatively narrow problem of antenna beamwidth.The greatest irradiation direction of general antenna is located at
Zenith direction, with the increase of irradiating angle, the gain of antenna declines, and low elevation gain will be very low, the beam angle of antenna
Narrow.
Solve the difficulty and meaning of above-mentioned technical problem:
Existing antenna broad beam technology, the physical size of antenna is all bigger, such as microstrip antenna lateral dimension is big
In 0.8 λ, and helical antenna height is greater than 0.25 λ, and physical size big in this way makes antenna in miniaturization using upper very tired
Difficulty is unable to satisfy the demand of low section compact array for example as the unit of phased array antenna.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of small wide frequency wide-beams to carry on the back chamber plane single armed spiral shell
Revolve antenna.
The invention is realized in this way a kind of small wide frequency wide-beam carries on the back chamber plane Monobrachial spiral antenna, it is described small-sized
Broadband and wide beamwidth back chamber plane Monobrachial spiral antenna is provided with radiation substrate, metal back chamber, metal frustum and metal base plate；
The radiation substrate is located at the top layer of plane Monobrachial spiral antenna；The metal back chamber and metal frustum position
In plane Monobrachial spiral antenna middle layer；The metal base plate is located at the lowest level of plane Monobrachial spiral antenna；
It is radiated on the radiation substrate using a plane Monobrachial spiral radiation element；Plane Monobrachial spiral can structure alone
At a circular polarisation working condition.
The metal back chamber is that the metal cavity of a rectangular in form is highly positioned at the underface of plane Monobrachial spiral
0.12λ；
The metal frustum is surrounded by metal back chamber, and the middle layer in entire antenna adjusts the impedance matching of antenna；Institute
The bottom that metal base plate is located at entire antenna is stated, radio-frequency joint is installed.
Further, the radiation element is plane Monobrachial spiral, and plane Monobrachial spiral is fed by coaxial probe；Plane
The radius of Monobrachial spiral is the λ of 0.1 λ -0.2；The spiral form used can for Archimedian screw unit, equiangular spiral and
Rectangular coil.
Further, the upper end of the coaxial probe be inserted into the central through hole of the radiation substrate and with plane Monobrachial spiral
Center weld, the lower end of the coaxial probe is located in radio-frequency joint.
Further, one is added to the radiation element terminal selective for absorbing the Chip-R of end current, distance
The radiation element end λ of 0.12 λ -0.15, resistance value are the real part of the characteristic impedance of spiral, and Chip-R is used to adjust antenna circular polarisation
Broadband character.
Further, the metal back chamber height is 0.12 λ, and positioned at the underface of plane Monobrachial spiral, metal carries on the back chamber distance
The plane Monobrachial spiral λ of 0.07 λ -0.1 is adjusted by the height of adjusting metal cavity and the distance apart from plane Monobrachial spiral
Save the beam angle of antenna.
Further, there is a cylindrical hole at metal frustum center, above and below the diameter and frustum by adjusting through-hole
The diameter adjustment impedance operator on surface realizes the wide band impedance matching of plane Monobrachial spiral antenna.
Further, the radio-frequency joint is placed in the downside of metal base plate, and the coaxial probe of the radio-frequency joint passes through described
The crust of the cylindrical hole of metal halfpace, the radio-frequency joint is connect with metal base plate.
In conclusion advantages of the present invention and good effect are as follows: plane Monobrachial spiral of the invention can be Archimedes's spiral shell
Unit, equiangular spiral and rectangular coil etc. are revolved, plane Monobrachial spiral can constitute alone a circular polarisation working condition；Metal back
Chamber is the metal cavity of a rectangular in form, and positioned at the underface of plane Monobrachial spiral, height is about 0.12 λ, effectively increases day
The beam angle of line；One is added to the radiation element end property of can choose for absorbing the Chip-R of end current, apart from spoke
About 0.12 λ of λ -0.15 of first end is penetrated, resistance value is the real part of the characteristic impedance of spiral, and Chip-R can be used to adjust antenna entelechy
The broadband character of change；It is about 0.12 λ that metal, which carries on the back chamber height, and positioned at the underface of plane Monobrachial spiral, it is flat that metal carries on the back chamber distance
The Monobrachial spiral λ of 0.07 λ -0.1 in face is adjusted by the height of adjusting metal cavity and the distance apart from plane Monobrachial spiral
The beam angle of antenna increases the beam angle of antenna in which can dramatically；There is a cylindrical hole at metal frustum, center, passes through
The diameter of the diameter and frustum upper and lower surface that adjust through-hole adjusts impedance operator, to realize plane Monobrachial spiral antenna
Wide band impedance matching.
Small wide frequency wide-beam of the invention carries on the back chamber plane Monobrachial spiral antenna, and example radiation fin uses a A Ji meter
Moral helical antenna is realized, the spiral forms such as equiangular spiral and rectangular coil can also be used；Using single-point feedback, entelechy is radiated
Change electromagnetic wave；Since plane Monobrachial spiral radiation elemental size is small, compact-sized, the side length of entire antenna only 0.53 λ, antenna thickness
Less than 0.18 λ, this antenna size is significantly less than conventional planar helical antenna；Antenna impedance bandwidth reaches 30% or more, antenna
Axial ratio bandwidth reach 17%, half-power beam width can achieve 130 °；Circular polarization characteristics are good, and have wider wave
Beam width.
Existing antenna realizes that widely used circular polarized antenna is mainly micro-strip to circular polarisation in mobile communication system
Circular polarized antenna and stereo spiral antenna.Microstrip antenna is a kind of miniature antenna, has low section, and easy processing simultaneously may be implemented
Circularly polarised wave beam width, but its narrower bandwidth, substantially 10% hereinafter, loss is larger, even if bandwidth can pass through different modes
Improved, but structure also becomes relative complex, moreover, the beam angle of microstrip antenna is lower than ± 50 °；Stereo spiral antenna has
Bipyramid spiral, four arm spirals etc., have wider circular polarization radiation wave beam, and beam angle reaches ± 70 °, can face upward lower
Keep higher gain on Angle Position, but its narrower bandwidth, 10% hereinafter, axial physical size is big (to be greater than a wave
It is long), feed network structures are complicated, and to requirement on machining accuracy height, and the cost is higher.
Antenna of the invention realizes that wide band principle is because flat helical antenna itself is due to contracting than principle, due to spiral shell
The characteristic for revolving structure rotation corresponds to matching status having the same on different frequency in spiral different radii, and uses metal
The structure of frustum adjusts impedance matching, therefore the antenna has very wide impedance bandwidth.The plane Monobrachial spiral antenna is realized
Broad beam characteristic is mainly realized in terms of following two: one is helical antenna does not add can all carry out when chamber in upper and lower surface
Radiation, and radiation polarization characteristic is exactly the opposite, such as zenith direction radiates left-hand circular polarization wave, antenna lower end radiates dextrorotation entelechy
Change wave, due to selecting suitable metal base plate at a distance from spiral element, reflection of the right-handed circular polarization wave by floor, rotation direction phase
It is overlapped mutually instead and in zenith direction and left-hand circular polarization wave radiation field, expands beam angle；Second, due to adding metal cavity
Reason, the electric current in spiral can generate the induced current along metal cavity, and the electromagnetic wave of the current emissions can be in zenith direction
It cancels out each other with the electromagnetic wave of spiral own radiation, and in low elevation direction since the reason of wave path-difference is overlapped mutually, make antenna
Low elevation gain become larger.Adding absorption resistance improves circular polarization characteristics, is because the cross polarization that end current generates is shadow
The antenna axial ratio key factor is rung, the electric current of end is absorbed by Chip-R, circular polarization characteristics will be improved.
In conclusion inventive antenna is simultaneously due to the structure and Chip-R that use metal back chamber, metal frustum
The broad beam characteristic and broadband character for realizing antenna, solve the technical problem of conventional circular polarization antenna.Inventive antenna
It can be used for the wireless communication terminal of high-speed mobile carrier, including vehicle-mounted, airborne, boat-carrying wireless communication, guaranteeing antenna
It is high performance simultaneously, can utmostly reduce influence of the antenna to the shape and aerodynamics index of carrier.In addition, this hair
Line technology can also be used for spaceborne and airborne synthetic aperture phased array unit tomorrow, help to obtain high performance phased array
Antenna.
Detailed description of the invention
Fig. 1 is small wide frequency wide-beam back chamber plane Monobrachial spiral antenna structure signal provided in an embodiment of the present invention
Figure；
Fig. 2 is the structural schematic diagram of metal back chamber perspective provided in an embodiment of the present invention.
Fig. 3 is the voltage of small wide frequency wide-beam back chamber plane Monobrachial spiral antenna port provided in an embodiment of the present invention
Standing-wave ratio curve graph.
Fig. 4 is that the axis of small wide frequency wide-beam back chamber plane Monobrachial spiral antenna provided in an embodiment of the present invention compares curve
Figure.
Fig. 5 is the radiation efficiency of small wide frequency wide-beam back chamber plane Monobrachial spiral antenna provided in an embodiment of the present invention
Curve graph.
Fig. 6 is small wide frequency wide-beam back chamber plane Monobrachial spiral antenna provided in an embodiment of the present invention in 9GHz
Phi=0 ° of face gain pattern and Phi=90 ° of face gain pattern.
Fig. 7 is small wide frequency wide-beam back chamber plane Monobrachial spiral antenna provided in an embodiment of the present invention in 10GHz
Phi=0 ° of face gain pattern and Phi=90 ° of face gain pattern.
Fig. 8 is the voltage of small wide frequency wide-beam back chamber plane Monobrachial spiral antenna port provided in an embodiment of the present invention
Standing-wave ratio curve graph (addition absorption resistance).
Fig. 9 is that the axis of small wide frequency wide-beam back chamber plane Monobrachial spiral antenna provided in an embodiment of the present invention compares curve
Figure (addition absorption resistance).
Figure 10 is the radiation effect of small wide frequency wide-beam back chamber plane Monobrachial spiral antenna provided in an embodiment of the present invention
Rate curve graph (addition absorption resistance).
Figure 11 is small wide frequency wide-beam back chamber plane Monobrachial spiral antenna provided in an embodiment of the present invention in 9GHz
Phi=0 ° of face gain pattern and Phi=90 ° of face gain pattern (addition absorption resistance).
Figure 12 is small wide frequency wide-beam back chamber plane Monobrachial spiral antenna provided in an embodiment of the present invention in 10GHz
Phi=0 ° of face gain pattern and Phi=90 ° of face gain pattern (addition absorption resistance).
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
It is restricted in existing mobile communication in antenna height, when size limits, in the premise for keeping broadband character
Under, the relatively narrow problem of antenna beamwidth.Structure and Chip-R of the present invention using metal back chamber, metal frustum, this hair
Line will realize the broad beam characteristic and broadband character of antenna simultaneously tomorrow, solve the technical problem of conventional circular polarization antenna.
Application principle of the invention is explained in detail with reference to the accompanying drawing.
As depicted in figs. 1 and 2, small wide frequency wide-beam provided in an embodiment of the present invention carries on the back chamber plane Monobrachial spiral antenna
Including radiation substrate 1, radiation substrate 1 is located at the top layer of antenna, and radiation substrate 1 is manufactured using printed circuit technology, radiated
A plane Monobrachial spiral 2 is printed on substrate 1；On radiation substrate 1, the underface of plane Monobrachial spiral center makes a call to one
Through-hole, is used to across coaxial probe 7, is fed by coaxial probe 7 to plane Monobrachial spiral 2；Plane Monobrachial spiral 2, thereon may be used
It to add the Chip-R 8 that resistance value is equal to plane Monobrachial spiral characteristic impedance real part, can also be not added, addition resistance 8 can change
The circular polarization characteristics of kind antenna；Metal back chamber 3 is located at the underface of plane Monobrachial spiral 2, and thickness is about 0.12 λ, apart from plane
2 horizontal distance of Monobrachial spiral, 0.07 λ of λ -0.1, metal back chamber 3 are located at the middle layer of antenna entirety；Have one in metal frustum 4
Cylindrical hole, it is consistent with metal back 3 height of chamber to pass through coaxial probe 7, and be surrounded by it；Metal base plate 5 is located at antenna
There is a through-hole at whole bottom, center, pass through coaxial probe 7, wherein metal back chamber 3, metal frustum 4 and metal base plate 5
For an entirety, can be integrally machined；The coaxial probe 7 of radio-frequency joint 6 passes through metal base plate 5 and metal frustum 4, is radiating
Plane Monobrachial spiral 2 on 1 lower end through-hole of substrate and radiation substrate 1 welds, and the crust of radio-frequency joint 6 is connect with metal base plate 5.
Antenna of the invention realizes that wide band principle is because flat helical antenna itself is due to contracting than principle, due to spiral shell
The characteristic of rotation corresponds to matching status having the same on different frequency in spiral different radii, and uses metal frustum 4
Structure adjust impedance matching, therefore the antenna has very wide impedance bandwidth.
Antenna of the invention realizes that broad beam characteristic is mainly realized in terms of following two: one is helical antenna does not have
Adding can all be radiated when chamber in upper and lower surface, and radiation polarization characteristic is exactly the opposite, such as zenith direction radiates left-handed entelechy
Change wave, antenna lower end radiates right-handed circular polarization wave, right due to selecting suitable metal base plate 5 at a distance from plane Monobrachial spiral 2
Hand circular polarization wave passes through the reflection of metal base plate 5, oppositely oriented and mutually folded in zenith direction and left-hand circular polarization wave radiation field
Add, expands beam angle；Second, the electric current on plane Monobrachial spiral 2 can be generated along gold due to the reason for adding metal cavity 3
Belong to the induced current of cavity 3, the electromagnetic wave of the current emissions can be in the electromagnetism of zenith direction and 2 own radiation of plane Monobrachial spiral
Wave is cancelled out each other, and in low elevation direction since the reason of wave path-difference is overlapped mutually, so that the low elevation gain of antenna is become larger.Addition
It is to influence the antenna axial ratio key factor that the improvement circular polarization characteristics of absorption resistance 8, which are the cross polarizations generated because of end current,
The electric current of end is absorbed by Chip-R, circular polarisation will be improved.Multinomial technology common implementing, so that inventive antenna
Thickness less than 0.18 λ, lateral dimension is less than 0.53 λ, while antenna also has broadband, the circular polarization characteristics of broad beam.
Application effect of the invention is explained in detail below with reference to emulation.
1, emulation content
Fig. 3 is please referred to Figure 12.The voltage standing wave ratio of above-described embodiment antenna, axis ratio, radiation are imitated using simulation software
Rate, directional diagram are emulated, and simulate the case where end coils add absorption resistance.
2, simulation result
Fig. 3 is the curve that the voltage standing wave ratio emulated to embodiment antenna changes with working frequency.It can be seen that end
Oral thermometer reveals good broadband character, and the consistency of curve is very high.From 8.4GHz to 11.3GHz, voltage standing wave ratio is all
Less than 2, relative bandwidth is greater than 30%.Fig. 8 is to the voltage standing wave ratio that emulates of embodiment antenna of addition absorption resistance with work
Working frequency variation curve, the results showed that addition absorption resistance after should the result shows that, in 7.1GHz to 11.0GHz frequency range
Interior, which all has good broadband special efficacy.Inventive antenna obtains significant broadband character under the size, the frequency band
Mobile communication can be met to bandwidth demand.
Fig. 4 is the curve that the Circular polarization ratio emulated to embodiment antenna changes with working frequency, shows the antenna
Circular polarization characteristics.Wherein, frequency band of the Circular polarization ratio less than 3dB can cover 9.4~11.2GHz, and relative bandwidth reaches
17.5%.Fig. 9 is the song that the Circular polarization ratio emulated to the embodiment antenna of addition absorption resistance changes with working frequency
Line, frequency band of the Circular polarization ratio less than 3dB can at least cover 8.0~12.0GHz, and relative bandwidth, which is greater than, reaches 40%, expand
Circular polarisation frequency bandwidth.The circular polarisation index can meet most of mobile communication demand, it can be ensured that antenna is sent out in broadband
Penetrate and receive circular polarisation electromagnetic wave.
Fig. 5 is the curve that the radiation efficiency emulated to embodiment antenna changes with working frequency.The result shows that in frequency
Radiation efficiency is all larger than 90% in band 8.7~11.0GHz of range.Such efficiency can ensure that antenna most efficiently emits and connects
It receives, can get high signal strength under identical input power, meet the development need of communications industry energy-saving and emission-reduction and green low-carbon
It asks.Figure 10 is the curve that the radiation efficiency emulated to the embodiment antenna of addition absorption resistance changes with working frequency.?
Radiation efficiency is all larger than 90% in 9.4~10.8GHz of frequency range, this is because it is radiation effect that absorption resistance, which absorbs portion of energy,
Rate is lower.
Fig. 6, Fig. 7 are the Phi=0 ° of face directional diagrams and Phi=90 ° of face directional diagram emulated to embodiment antenna, respectively
It is obtained in 9GHz and 10GHz.It can be seen that antenna can obtain symmetrical circular polarisation directional diagram in different frequent points, and have
Wider beam angle.When 9GHz, Phi=0 ° of face 3dB beam angle of directional diagram is 126 °, Phi=90 ° of face 3dB beam angle
It is 136 °.When 10GHz, Phi=0 ° of face 3dB beam angle of directional diagram is 133 °, and Phi=90 ° of face 3dB beam angle is 134 °.
Figure 11, Figure 12 are the Phi=0 ° of face directional diagram emulated to the embodiment antenna of addition absorption resistance and Phi=90 ° of face side
Xiang Tu is obtained in 9GHz and 10GHz respectively.When 9GHz, Phi=0 ° of face 3dB beam angle of directional diagram is 120 °, Phi=90 ° of face
3dB beam angle is 135 °.When 10GHz, Phi=0 ° of face 3dB beam angle of directional diagram is 130 °, Phi=90 ° of face 3dB wave beam
Width is 130 °.Wider beam angle can make antenna footprint bigger.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (7)
1. a kind of small wide frequency wide-beam carries on the back chamber plane Monobrachial spiral antenna, which is characterized in that the small wide frequency bandwidth wave
Beam back chamber plane Monobrachial spiral antenna is provided with radiation substrate, metal back chamber, metal frustum and metal base plate；
The radiation substrate is located at the top layer of plane Monobrachial spiral antenna；The metal back chamber and the metal frustum are located at flat
Face Monobrachial spiral antenna middle layer；The metal base plate is located at the lowest level of plane Monobrachial spiral antenna；
It is radiated on the radiation substrate using a plane Monobrachial spiral radiation element；Plane Monobrachial spiral can constitute alone one
A circular polarisation working condition；
The metal back chamber is the metal cavity of a rectangular in form, positioned at the underface of plane Monobrachial spiral, highly less than 0.12
λ；
The metal frustum is surrounded by metal back chamber, and the middle layer in entire antenna adjusts the impedance matching of antenna；The gold
Belong to the bottom that bottom plate is located at entire antenna, radio-frequency joint is installed.
2. small wide frequency wide-beam as described in claim 1 carries on the back chamber plane Monobrachial spiral antenna, which is characterized in that the spoke
Penetrating member is plane Monobrachial spiral, and plane Monobrachial spiral is fed by coaxial probe；The radius of plane Monobrachial spiral is 0.1
λ—0.2λ；The spiral form used can be Archimedian screw unit, equiangular spiral and rectangular coil.
3. small wide frequency wide-beam as claimed in claim 2 carries on the back chamber plane Monobrachial spiral antenna, which is characterized in that described same
The center weld in the central through hole of the radiation substrate and with plane Monobrachial spiral, the coaxial spy are inserted into the upper end of axis probe
The lower end of needle is located in radio-frequency joint.
4. small wide frequency wide-beam as described in claim 1 carries on the back chamber plane Monobrachial spiral antenna, which is characterized in that the spoke
Add one with penetrating first terminal selective for absorbing the Chip-R of end current, apart from 0.12 λ -0.15 of radiation element end
λ, resistance value are the real part of the characteristic impedance of spiral, and Chip-R is used to adjust the broadband character of antenna circular polarisation.
5. small wide frequency wide-beam as described in claim 1 carries on the back chamber plane Monobrachial spiral antenna, which is characterized in that the gold
Belong to back chamber height less than 0.12 λ, positioned at the underface of plane Monobrachial spiral, metal carries on the back chamber apart from 0.07 λ of plane Monobrachial spiral-
0.1 λ adjusts the beam angle of antenna by the height of adjusting metal cavity and the distance apart from plane Monobrachial spiral.
6. small wide frequency wide-beam as described in claim 1 carries on the back chamber plane Monobrachial spiral antenna, which is characterized in that the gold
Belonging to frustum center has a cylindrical hole, by adjusting the diameter of through-hole and the diameter adjustment impedance spy of frustum upper and lower surface
Property, realize the wide band impedance matching of plane Monobrachial spiral antenna.
7. small wide frequency wide-beam as described in claim 1 carries on the back chamber plane Monobrachial spiral antenna, which is characterized in that described to penetrate
Frequency connector is placed in the downside of metal base plate, and the coaxial probe of the radio-frequency joint passes through the cylindrical hole of the metal halfpace,
The crust of the radio-frequency joint is connect with metal base plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN113506990A (en) * | 2021-07-09 | 2021-10-15 | 深圳大学 | Compact multimode broadband circularly polarized cavity-backed slot antenna and antenna array |
| CN117832829A (en) * | 2024-02-28 | 2024-04-05 | 长光卫星技术股份有限公司 | S-band double-layer microwave bandwidth beam antenna based on metal cavity |
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| US9437932B1 (en) * | 2011-09-09 | 2016-09-06 | The United States Of America As Represented By The Secretary Of The Navy | Two-arm delta mode spiral antenna |
| CN103346386A (en) * | 2013-06-18 | 2013-10-09 | 哈尔滨工业大学 | Omnibearing broadband form attaching antenna for plane communication |
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| CN113506990A (en) * | 2021-07-09 | 2021-10-15 | 深圳大学 | Compact multimode broadband circularly polarized cavity-backed slot antenna and antenna array |
| CN117832829A (en) * | 2024-02-28 | 2024-04-05 | 长光卫星技术股份有限公司 | S-band double-layer microwave bandwidth beam antenna based on metal cavity |
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