CN109713454A - Ultra wide band electromagnetic assembled TEM electromagnetic horn and its parameter determination method - Google Patents
Ultra wide band electromagnetic assembled TEM electromagnetic horn and its parameter determination method Download PDFInfo
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- CN109713454A CN109713454A CN201910108787.6A CN201910108787A CN109713454A CN 109713454 A CN109713454 A CN 109713454A CN 201910108787 A CN201910108787 A CN 201910108787A CN 109713454 A CN109713454 A CN 109713454A
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Abstract
本公开提供了一种超宽带电磁组合TEM喇叭天线及其参数确定方法，其TEM喇叭天线包括：匚形方框、TEM喇叭上臂、TEM喇叭下臂、寄生枝节、介质垫片、SMA接头和凸台；电流通过所述SMA接头馈入TEM喇叭天线，TEM喇叭上臂馈电端与SMA接头内芯相连，介质垫片填充于上臂过渡段和下臂过渡段间，匚形方框、TEM喇叭上臂和寄生枝节围成封闭磁环，电流流经寄生枝节处发生分流。本公开通过上下臂椭圆渐变方式优化了TEM天线高频裂瓣，使高频增益提高；通过圆弧形寄生枝节增强低频辐射，拓展低频带宽；通过上下臂高度不对称设计调整最大辐射方向，使波束保持在x轴方向；通过过渡段代替巴伦，以介质垫片调节过渡阻抗，实现天线带宽大于20倍频程。
The present disclosure provides an ultra-wideband electromagnetic combined TEM horn antenna and a method for determining parameters thereof. The TEM horn antenna includes: a sag-shaped frame, an upper arm of the TEM horn, a lower arm of the TEM horn, a parasitic branch, a dielectric gasket, an SMA joint and a convex The current is fed into the TEM horn antenna through the SMA connector, the feed end of the upper arm of the TEM horn is connected to the inner core of the SMA connector, the dielectric gasket is filled between the transition section of the upper arm and the transition section of the lower arm. It forms a closed magnetic ring with the parasitic branch, and the current flows through the parasitic branch to be shunted. The present disclosure optimizes the high-frequency split lobe of the TEM antenna through the ellipse gradient method of the upper and lower arms, so as to improve the high-frequency gain; enhances the low-frequency radiation through the arc-shaped parasitic branches, and expands the low-frequency bandwidth; The beam is kept in the x-axis direction; the balun is replaced by a transition section, and the transition impedance is adjusted with a dielectric spacer to achieve an antenna bandwidth greater than 20 octaves.
Description
Technical field
This disclosure relates to ultra-wideband antenna design field more particularly to a kind of ultra wide band electromagnetic assembled TEM electromagnetic horn and
Its parameter determination method.
Background technique
For ultra-wideband antenna, compact in size there are contradictions between low-frequency cut-off frequency expansion.How to protect
Realization antenna miniaturization is also always the focus of ultra-wideband antenna research while demonstrate,proving the beamwidth of antenna.
The common form of ultra-wideband antenna has load dipole antenna, Bow-tie antenna, Vivaldi antenna, electromagnetic horn
Deng, wherein load dipole antenna has enough operating bandwidths, easily designed and processing, but due to the loss of loading resistor,
Efficiency is lower, and has very long size, may not apply to in the higher array of portability requirements.Bow-tie antenna is frequent
Applied to shallow-layer earth-probing radar, Bow-tie antenna, which introduces loading resistor in end, can increase bandwidth of operation, but reduce
Radiation efficiency, while size is also larger.Vivaldi antenna is a kind of flat plane antenna, the water to broaden to one along exponential profile
Plane gap feed, the beamwidth of antenna are limited by opening width and feed transition portion size, and impulse response has in time domain
Hangover, and still there is biggish radical length relative to wavelength.In addition to this, Vivaldi antenna to vibration sensing and structure it is crisp
It is weak, it is obviously improper for portable antenna battle array.Electromagnetic horn has the advantages that high-gain and wide band simultaneously, adds ridge further
Increase bandwidth of operation, major defect is that size is big, and transmitting signal has larger hangover.Furthermore there is one kind in electromagnetic horn classification
TEM electromagnetic horn usually realizes the single polarization TEM wave of radiation at mouth face along the metal of exponential fade by two panels.
TEM electromagnetic horn at this stage is various informative, but low frequency bandwidth is limited to antenna longitudinal length, and longitudinal length is logical
It is often the half of low-limit frequency wavelength；And bell mouth surface subtended angle also determines the directional diagram bandwidth and low frequency radiation of antenna
Characteristic.For existing electromagnetic combined TEM electromagnetic horn in the world, there is also some problems:
Antenna standing wave ratio is relatively narrow less than 2 impedance bandwidth, does not play the advantage of TEM electromagnetic horn itself, usually by
Gradual change is carried out based on traditional exponential shape in the discontinuous and TEM flared curve of feed, causes to feed inefficient and high
Frequency cutoff frequency is lower；It is influenced by the asymmetry of TEM horn flare angle curve end subtended angle and feed, antenna greatest irradiation direction
It is deviated to one side, when electric size increases to normal TEM loudspeaker, direction map migration and rip-panel characteristic are become apparent；Furthermore time domain point
Analysis is particularly important for ultra-wideband antenna, and the hangover degree for emitting time-domain signal will directly affect radar performance, and this is asked
Topic is typically ignored.
Summary of the invention
(1) technical problems to be solved
Present disclose provides a kind of ultra wide band electromagnetic assembled TEM electromagnetic horn and its parameter determination methods, at least partly
Solve technical problem set forth above.
(2) technical solution
According to one aspect of the disclosure, a kind of ultra wide band electromagnetic assembled TEM electromagnetic horn is provided, comprising: Contraband shape side
Frame, including upper ledge, lower frame and support frame；The upper ledge is connected by support frame respectively with the lower frame；It is set on the support frame
It is equipped with boss；Sub-miniature A connector is set on the boss, and electric current passes through the sub-miniature A connector feed-in TEM electromagnetic horn；TEM loudspeaker
Upper arm is convex structure；The TEM loudspeaker upper arm mouth face end is connected with the upper ledge of the Contraband shape box；On the TEM loudspeaker
Arm feed end is connected with the sub-miniature A connector inner core；TEM loudspeaker lower arm is convex structure；The EM loudspeaker lower arm mouth face end with
The lower frame of the Contraband shape box is connected；The TEM loudspeaker lower arm feed end is connected with the support frame of the Contraband shape box；Dielectric pad
Piece is filled between the TEM loudspeaker upper arm feed end and the TEM loudspeaker lower arm feed end.
In some embodiments of the present disclosure, sequentially wrapped from TEM loudspeaker upper arm feed end to TEM loudspeaker upper arm mouth face end
Include: upper arm changeover portion, one end of the upper arm changeover portion are connected with the sub-miniature A connector inner core；Upper arm elliptic curve section, it is described on
The other end of arm changeover portion is connected with one end of the upper arm elliptic curve section, the other end of the upper arm elliptic curve section and institute
The upper ledge for stating Contraband shape box is connected；It sequentially include: lower arm mistake from TEM loudspeaker lower arm arm feed end to TEM loudspeaker lower arm mouth face end
Cross section and lower arm elliptic curve section；The medium gasket is filled between the upper arm changeover portion and lower arm changeover portion.
In some embodiments of the present disclosure, upper arm changeover portion is ladder plane；Lower arm changeover portion is clinoplain；It is described
Medium gasket is wedge structure.
In some embodiments of the present disclosure, the width self feeding end of the upper arm changeover portion to the linear variation in mouth face,
And range of linearity is 1.5mm-12.01mm；The width self feeding end of the upper arm elliptic curve section is to the linear change in mouth face
Change, and range of linearity is 12.01mm-150mm.
In some embodiments of the present disclosure, the spacing self feeding end of the upper arm changeover portion and the lower arm changeover portion to
The variation range at mouth face end is 1.08mm-3.75mm；The width self feeding end of the lower arm elliptic curve section is linear to mouth face
Variation, range of linearity 3.75mm-150mm.
In some embodiments of the present disclosure, further includes: parasitic minor matters are convex structure；The parasitism minor matters first
End is connected with the upper ledge of the Contraband shape box, and the parasitism minor matters second end is connected with the TEM loudspeaker upper arm.
In some embodiments of the present disclosure, the width self feeding end of the parasitism minor matters is to the variation range at mouth face end
53.407mm-150mm。
In some embodiments of the present disclosure, the TEM loudspeaker upper arm and TEM loudspeaker lower arm be not symmetrical, the TEM loudspeaker
The height of upper arm is greater than the height of the TEM loudspeaker lower arm.
According to one aspect of the disclosure, the parameter for additionally providing a kind of ultra wide band electromagnetic assembled TEM electromagnetic horn determines
Method, wherein include: step S100: the impedance variations of calculating feed end to mouth face end；Step S200: TEM loudspeaker are determined gradually
Varied curve elliptic curve, and TEM loudspeaker upper arm and TEM loudspeaker lower arm be not symmetrical；Step S300: the arc-shaped parasitic branch of installation
Section；Step S400: adjustment and optimization changeover portion parameter weld sub-miniature A connector and the paste medium gasket at feed.
It include: that upper arm elliptic curve section and lower arm are oval bent in some embodiments of the present disclosure, in the step S200
Line segment difference is as follows:
Wherein, z1For the height that upper arm elliptic curve section changes with x, z2For the height that lower arm elliptic curve section changes with x, x
For upper arm transition section length or lower arm transition section length；The width self feeding end of the TEM loudspeaker upper arm is to the linear change in mouth face
Change, until equal with the width of upper ledge of the Contraband shape box；The width self feeding end of the TEM loudspeaker lower arm to mouth face end not
Become.
(3) beneficial effect
It can be seen from the above technical proposal that disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn and its parameter determination side
Method at least has the advantages that one of them or in which a part:
(1) using coaxially antenna is directly connected at disclosure feed, realize that current balance type is set instead of balun by changeover portion
Meter, is extended to the beamwidth of antenna greater than 20 frequencys multiplication.
(2) at disclosure feed increase medium gasket, except make coaxial line to approximation microstrip line changeover portion impedance continuously in addition to,
Antenna overall structure has been further fixed, antenna integral strength is improved.
(3) disclosure improves directional diagram and improves greatest irradiation direction using elliptic curve as TEM horn transition curve
Gain.
(4) disclosure is conducive to increase TEM horn flare angle, improves low frequency radiation performance and time domain waveform.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of embodiment of the present disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn.
Fig. 2 is the side view of Fig. 1.
Fig. 3 a- Fig. 3 b is that the feed of embodiment of the present disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn optimizes schematic diagram.
Fig. 4 is the antenna reflection coefficient S11 schematic diagram of embodiment of the present disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn.
Fig. 5 is that the antenna of embodiment of the present disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn surveys reflection coefficient S11 signal
Figure.
Fig. 6 a- Fig. 6 j is the antenna face main frequency point E and the H of embodiment of the present disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn
Face directional diagram.
Fig. 7 is the time domain signal waveform figure of embodiment of the present disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn.
Fig. 8 is the flow diagram of the parameter determination method of embodiment of the present disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn.
[embodiment of the present disclosure main element symbol description in attached drawing]
1- Contraband shape box；
2-TEM loudspeaker upper arm；
21- upper arm changeover portion；
3-TEM loudspeaker lower arm；
31- lower arm changeover portion；
4- parasitism minor matters；
5- medium gasket；
6-SMA connector；
61-SMA joint inner core；
7- boss.
Specific embodiment
The present invention by TEM electromagnetic horn increase frame structure and optimization arc parasitic metal minor matters, it is equivalent go out
More irradiation structures, thus size needed for being reduced significantly antenna with the radiation of the equivalent magnet ring of low frequency end.It is this with combine
The antenna of the method lifting theory performance of equivalent Electromagnetic Vibrator is referred to as electromagnetic assembled antenna.
Present disclose provides a kind of ultra wide band electromagnetic assembled TEM electromagnetic horns, wherein includes: Contraband shape box, TEM loudspeaker
Upper arm, TEM loudspeaker lower arm, medium gasket；Contraband shape box, including upper ledge, lower frame and support frame；Upper ledge and lower frame pass through branch respectively
Support frame is connected, and boss is provided on support frame；Sub-miniature A connector is set on boss, and electric current passes through sub-miniature A connector feed-in TEM loudspeaker day
Line；TEM loudspeaker upper arm mouth face end is connected with the upper ledge of Contraband shape box；TEM loudspeaker upper arm feed end is connected with sub-miniature A connector inner core；
EM loudspeaker lower arm mouth face end is connected with the lower frame of Contraband shape box；TEM loudspeaker lower arm feed end is connected with the support frame of Contraband shape box；
Medium gasket is filled between TEM loudspeaker upper arm feed end and TEM loudspeaker lower arm feed end.The disclosure by upper lower arm ellipse gradually
Become method optimizing TEM antenna high frequency rip-panel, improves high-frequency gain；Enhance low frequency radiation by arc-shaped parasitic minor matters, opens up
Open up low frequency bandwidth；Greatest irradiation direction is adjusted by the highly asymmetric design of upper lower arm, wave beam is made to be maintained at x-axis direction；Pass through
Changeover portion replaces balun, adjusts transition impedance with medium gasket, realizes that the beamwidth of antenna is greater than 20 octaves.
For the purposes, technical schemes and advantages of the disclosure are more clearly understood, below in conjunction with specific embodiment, and reference
The disclosure is further described in attached drawing.
Disclosure some embodiments will be done referring to appended attached drawing in rear and more comprehensively describe to property, some of but not complete
The embodiment in portion will be shown.In fact, the various embodiments of the disclosure can be realized in many different forms, and should not be construed
To be limited to this several illustrated embodiment；Relatively, these embodiments are provided so that the disclosure meets applicable legal requirement.
In first exemplary embodiment of the disclosure, a kind of ultra wide band electromagnetic assembled TEM electromagnetic horn is provided.Figure
1 is the structural schematic diagram of embodiment of the present disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn.Fig. 2 is the side view of Fig. 1.As Fig. 1,
Shown in Fig. 2, disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn includes: under Contraband shape box 1, TEM loudspeaker upper arm 2, TEM loudspeaker
Arm 3, parasitic minor matters 4, medium gasket 5, sub-miniature A connector 6 and boss 7.It upper arm changeover portion 21, lower arm changeover portion 31 at feed and fills out
The structure that the medium gasket 5 filled between upper arm changeover portion 21 and lower arm changeover portion 31 is constituted, is directly connected to day using coaxial fitting
The form of line.The disclosure realizes that current balance type is designed instead of balun by changeover portion, and the beamwidth of antenna is extended to greater than 20 frequencys multiplication.
Also increase medium block at feed, keeps coaxial line continuously outer to the changeover portion impedance of approximate microstrip line, further fixing antenna
Overall structure improves antenna integral strength.
Each component part of the present embodiment ultra wide band electromagnetic assembled TEM electromagnetic horn is retouched in detail individually below
It states.What needs to be explained here is that combined with Figure 1 and Figure 2, self feeding end to the direction at mouth face end be along the x axis, hereafter will be with
It is stated along the x axis.
Contraband shape box 1, including upper ledge, lower frame and support frame；Upper ledge one end and lower frame one end are opposite with support frame respectively
Both ends are connected, and upper ledge and lower frame are vertical with support frame respectively, form Contraband shape frame structure.
TEM loudspeaker upper arm 2 is convex structure；The upper ledge other end phase at TEM loudspeaker upper arm 2 mouthfuls of faces end and Contraband shape box 1
Even；2 feed end of TEM loudspeaker upper arm is connected with sub-miniature A connector inner core 61.Further, TEM loudspeaker upper arm 2 sequentially wraps along the x axis
Include: upper arm changeover portion 21 and upper arm elliptic curve section, upper arm changeover portion 21 are connected with sub-miniature A connector inner core 61；Upper arm elliptic curve
Section is connected with the upper ledge other end of Contraband shape box 1.Further, upper arm changeover portion 21 is ladder plane.In a specific implementation
In example, to the linear increase in mouth face, the linear range that increases is 1.5mm-12.01mm at the width self feeding end of upper arm changeover portion 21；
To the linear increase in mouth face, the linear range that increases is 12.01mm-150mm at the width self feeding end of upper arm elliptic curve section.
TEM loudspeaker lower arm 3 is convex structure；The lower frame other end phase at TEM loudspeaker lower arm mouth face end and Contraband shape box 1
Even；3 feed end of TEM loudspeaker lower arm is connected with the support frame of Contraband shape box 1.Further, TEM loudspeaker lower arm 3 is suitable along the x axis
Secondary includes: lower arm changeover portion 31 and lower arm elliptic curve section；Lower arm changeover portion 31 is connected with the support frame of Contraband shape box 1；Lower arm
Elliptic curve section is connected with the lower frame other end of Contraband shape box 1.Further, lower arm changeover portion 31 is clinoplain.One
In specific embodiment, the increase range of the spacing of upper arm changeover portion 21 and lower arm changeover portion 31 along the x axis is 1.08mm-
3.75mm, to the linear increase in mouth face, the linear range that increases is 3.75mm- at the width self feeding end of lower arm elliptic curve section
150mm。
Medium gasket 5 is filled between upper arm changeover portion 21 and lower arm changeover portion 31.Further, medium gasket 5 is wedge shape
Structure.
Parasitic minor matters 4 are convex structure, between Contraband shape box 1 and TEM loudspeaker upper arm 2；Parasitic minor matters 4 first
End is connected with the upper ledge of Contraband shape box 1, and parasitic 4 second end of minor matters is connected with TEM loudspeaker upper arm 2.In one embodiment, it posts
The increase range of the width of raw minor matters 4 along the x axis is 53.407mm-150mm.
Boss 7 is connected with the support frame outer wall of Contraband shape box 1.
Sub-miniature A connector 6 is placed on boss 7.
In first exemplary embodiment of the disclosure, a kind of ultra wide band electromagnetic assembled TEM electromagnetic horn is additionally provided
Parameter determination method, comprising:
Step S100: the impedance variations of calculating feed end to mouth face end；
Step S200: determining the gradient ramp elliptic curve of TEM loudspeaker, and TEM loudspeaker upper arm and TEM loudspeaker lower arm not phase
Symmetrically；
Step S300: the arc-shaped parasitic minor matters of installation；
Step S400: changeover portion is prepared, and welds sub-miniature A connector and the paste medium gasket at feed.
Wherein, the characteristic impedance at TEM horn feed end and mouth face end is calculated, in the step s 100 to guarantee feeding
Place is 50 ohm, and TEM electromagnetic horn is connect with coaxial line；Mouth is about 250 ohm at face, TEM electromagnetic horn and air impedance
With preferable.Meanwhile also needing to consider the variation of characteristic impedance under transmission medium and different frequency.In addition, the mouth of TEM electromagnetic horn
Face subtended angle determines mouthful face reflection and a gain size to a certain extent, so should focus on to consider when selection change curve.
Specifically, step S100 includes that parallel wire approximate impedance calculates, specific formula are as follows:
Wherein, A is the impedance damping factor, and B is impedance ratio, and W is the line width of parallel wire, and h is line-to-line away from εrFor wherein
Medium relative dielectric constant, e are natural Exponents, Z0For parallel wire impedance.
It further include that microstrip line approximate impedance calculates in step S100, specific formula are as follows:
Wherein, A is the impedance damping factor, and B is impedance ratio, and W is the line width of microstrip line, and h is micro-strip and ground spacing, εrFor it
Middle medium relative dielectric constant, e are natural Exponents, Z0For micro-strip line impedance.
The gradient ramp of parallel wire is transitioned into step S200:TEM electromagnetic horn from microstrip line as ellipse, and TEM loudspeaker
Upper arm and TEM loudspeaker lower arm be not symmetrical.
The gradient ramp of TEM electromagnetic horn is usually index, and exponential curve does not have at the end port face end of TEM electromagnetic horn
Sufficiently large subtended angle, reflects electric current at this, influences the return loss of TEM electromagnetic horn and deteriorates the direction of full frequency band
Figure, and increase vertical 90 ° or curling extension in exponential curve end also can cause to reflect because of change in the instantaneous impedance, and will increase TEM
Electromagnetic horn size.
To increase the electromagnetic horn mouth face TEM end subtended angle, TEM electromagnetic horn is transitioned into the curve of parallel wire from microstrip line
It is selected as ellipse, the disclosure confirms elliptic curve more suitable for electromagnetic combined TEM electromagnetic horn.TEM loudspeaker upper arm and TEM loudspeaker
The long axis of a quarter ellipse of lower arm in the x direction is 15cm, and the TEM loudspeaker upper arm short axle on the direction z is 9cm, the direction z
On TEM loudspeaker lower arm short axle be 6cm.TEM loudspeaker upper arm and TEM loudspeaker lower arm curve difference are as follows:
Wherein, z1For the height that TEM loudspeaker upper arm changes with x, z2For the height that TEM loudspeaker lower arm changes with x, x is upper arm
Transition section length (or lower arm transition section length).
For the width of TEM loudspeaker upper arm with x-axis linear change, width changes to 150mm by 12.01mm, with Contraband shape box
Upper ledge is wide.The width of TEM loudspeaker lower arm is 150mm, is not changed with x-axis.What needs to be explained here is that TEM loudspeaker upper arm and
The asymmetric processing of TEM loudspeaker lower arm: the two z-axis direction height is known not by TEM loudspeaker upper arm and TEM loudspeaker lower arm curve
Together, this design is main consideration with greatest irradiation direction stability, realizes TEM bell mouth surface end electric current by asymmetric handle
Balance, to guarantee that the disclosure possesses equally stable greatest irradiation direction in front end and low frequency end.
Step S300: increase arc-shaped parasitic minor matters, form magnet ring irradiation structure.
The parasitic minor matters of TEM loudspeaker upper arm are a circular arc, and width is transitioned into 150mm, starting and stop bit from 53.407mm
Setting is 15cm*0.3=4.5cm at 45mm in x-axis (after changeover portion from 0.3 times of long axis) i.e..And in x-axis most
A little louder in the midpoint of change width and height change.Closed magnet ring is by Contraband shape box 1, TEM loudspeaker upper arm 2 and parasitic minor matters
4 surround, and electric current shunts at parasitic minor matters when flowing through TEM loudspeaker upper arm, and a part continues to complete with TEM loudspeaker lower arm
The radiation of TEM electromagnetic horn, another part prolong parasitic minor matters upstream, radiation are completed in closed magnet ring, such as Fig. 1 and Fig. 2 institute
Show.On the one hand increased parasitism minor matters enhance low frequency radiation, on the other hand optimize reflection coefficient, i.e. return loss, make day
Line impedence bandwidth is broadened to low frequency.
Step S400: sub-miniature A connector and the paste medium gasket at feed are welded in changeover portion design.
It is the design and optimization of feed transition section first, feed transition segment length 1cm, wherein upper arm changeover portion is horizontal trapezoidal
Face, width is from 1.5mm linear change to 12.01mm；Lower arm changeover portion is a slope, between TEM loudspeaker upper arm and TEM loudspeaker lower arm
Away from increasing to h2=3.75mm from h1=1.08mm, as shown in Fig. 3 a- Fig. 3 b.It should be placed on boss after completing component welding
Sub-miniature A connector, the sub-miniature A connector should be flange gold filled type sub-miniature A connector, can with but be not limited to China up to connector KFD-90.Flange is covered with gold leaf
The flange of type sub-miniature A connector is fixed by screws on metal bosses, gold filled pass through component 1 metal backing, make coaxial inner core with
Upper arm changeover portion is welded together.Furthermore the wedge shape that upper arm changeover portion and lower arm changeover portion central filler have width to be 4cm is situated between
Matter gasket can use Neltec NX9240 and electrical parameter similar materials, relative dielectric constant 2.4, loss angle tangent 0.0016.This
Medium gasket should be sticked between two parties on TEM loudspeaker lower arm slope, as shown in Fig. 3 a- Fig. 3 b.
It is as shown in Figure 1 and Figure 2 to manufacture the ultra wide band electromagnetic assembled TEM electromagnetic horn completed, antenna entirety size is 160mm*
150mm*150mm, corresponding electric size λmax/3.75*λmax/4*λmax/ 4, it is shorter by 50% or so than traditional TEM loudspeaker longitudinal size.
As shown in figure 4, impedance bandwidth is defined as reflection coefficient -10dB frequency separation below, the electromagnetism after expanding bandwidth
Combination TEM electromagnetic horn front end can work to 10GHz or more, and low-frequency cutoff end can be reduced to 0.45GHz, and bandwidth broadning arrives
Greater than 20 octaves.
As shown in figure 5, being related to frequency range 0.5GHz-1.5GHz for practical MIMO face battle array, measured data becomes with simulation result
Gesture substantially conforms to.
As shown in Fig. 6 a- Fig. 6 e and Fig. 6 f- Fig. 6 j, all directions figure greatest irradiation direction is forward direction, is not deviated substantially
With rip-panel.
As shown in fig. 7, normalizing time domain letter outside the antenna 1m for the ultra wide band electromagnetic assembled TEM electromagnetic horn that the disclosure provides
Number waveform, the transmitted waveform of the disclosure more fully remains original signal frequency content, and it is smaller to trail, and has practical application valence
Value.
So far, attached drawing is had been combined the embodiment of the present disclosure is described in detail.It should be noted that in attached drawing or saying
In bright book text, the implementation for not being painted or describing is form known to a person of ordinary skill in the art in technical field, and
It is not described in detail.In addition, the above-mentioned definition to each element and method be not limited in mentioning in embodiment it is various specific
Structure, shape or mode, those of ordinary skill in the art simply can be changed or be replaced to it.
According to above description, those skilled in the art should have disclosure ultra wide band electromagnetic assembled TEM electromagnetic horn
Clearly understanding.
In conclusion the disclosure improves low frequency radiation performance and time domain waveform by increasing TEM horn flare angle, ellipse is utilized
Curve improves directional diagram and improves greatest irradiation direction gain as TEM horn transition curve.
It should also be noted that, the direction term mentioned in embodiment, for example, "upper", "lower", "front", "rear", " left side ",
" right side " etc. is only the direction with reference to attached drawing, not is used to limit the protection scope of the disclosure.Through attached drawing, identical element by
Same or similar appended drawing reference indicates.When may cause understanding of this disclosure and cause to obscure, conventional structure will be omitted
Or construction.
And the shape and size of each component do not reflect actual size and ratio in figure, and only illustrate the embodiment of the present disclosure
Content.In addition, in the claims, any reference symbol between parentheses should not be configured to the limit to claim
System.
It unless there are known entitled phase otherwise anticipates, the numerical parameter in this specification and appended claims is approximation, energy
Enough bases pass through the resulting required characteristic changing of content of this disclosure.Specifically, all be used in specification and claim
The middle content for indicating composition, the number of reaction condition etc., it is thus understood that repaired by the term of " about " in all situations
Decorations.Under normal circumstances, the meaning expressed refers to include by specific quantity ± 10% variation in some embodiments, some
± 5% variation in embodiment, ± 1% variation in some embodiments, in some embodiments ± 0.5% variation.
Furthermore word "comprising" does not exclude the presence of element or step not listed in the claims.It is located in front of the element
Word "a" or "an" does not exclude the presence of multiple such elements.
In addition, unless specifically described or the step of must sequentially occur, there is no restriction in the above institute for the sequence of above-mentioned steps
Column, and can change or rearrange according to required design.And above-described embodiment can be based on the considerations of design and reliability, that
This mix and match is used using or with other embodiments mix and match, i.e., the technical characteristic in different embodiments can be freely combined
Form more embodiments.
Similarly, it should be understood that in order to simplify the disclosure and help to understand one or more of each open aspect,
Above in the description of the exemplary embodiment of the disclosure, each feature of the disclosure is grouped together into single implementation sometimes
In example, figure or descriptions thereof.However, the disclosed method should not be interpreted as reflecting the following intention: i.e. required to protect
The disclosure of shield requires features more more than feature expressly recited in each claim.More precisely, as following
Claims reflect as, open aspect is all features less than single embodiment disclosed above.Therefore,
Thus the claims for following specific embodiment are expressly incorporated in the specific embodiment, wherein each claim itself
All as the separate embodiments of the disclosure.
Particular embodiments described above has carried out further in detail the purpose of the disclosure, technical scheme and beneficial effects
Describe in detail it is bright, it is all it should be understood that be not limited to the disclosure the foregoing is merely the specific embodiment of the disclosure
Within the spirit and principle of the disclosure, any modification, equivalent substitution, improvement and etc. done should be included in the guarantor of the disclosure
Within the scope of shield.
Claims (10)
1. a kind of ultra wide band electromagnetic assembled TEM electromagnetic horn, wherein include:
Contraband shape box, including upper ledge, lower frame and support frame；The upper ledge is connected by support frame respectively with the lower frame；It is described
Boss is provided on support frame；
Sub-miniature A connector is set on the boss, and electric current passes through the sub-miniature A connector feed-in TEM electromagnetic horn；
TEM loudspeaker upper arm is convex structure；The TEM loudspeaker upper arm mouth face end is connected with the upper ledge of the Contraband shape box；Institute
TEM loudspeaker upper arm feed end is stated to be connected with the sub-miniature A connector inner core；
TEM loudspeaker lower arm is convex structure；The EM loudspeaker lower arm mouth face end is connected with the lower frame of the Contraband shape box；Institute
TEM loudspeaker lower arm feed end is stated to be connected with the support frame of the Contraband shape box；
Medium gasket is filled between the TEM loudspeaker upper arm feed end and the TEM loudspeaker lower arm feed end.
2. ultra wide band electromagnetic assembled TEM electromagnetic horn according to claim 1, wherein
Sequentially include: from TEM loudspeaker upper arm feed end to TEM loudspeaker upper arm mouth face end
Upper arm changeover portion, one end of the upper arm changeover portion are connected with the sub-miniature A connector inner core；
Upper arm elliptic curve section, the other end of the upper arm changeover portion is connected with one end of the upper arm elliptic curve section, described
The other end of upper arm elliptic curve section is connected with the upper ledge of the Contraband shape box；
It sequentially include: lower arm changeover portion and lower arm elliptic curve from TEM loudspeaker lower arm arm feed end to TEM loudspeaker lower arm mouth face end
Section；
The medium gasket is filled between the upper arm changeover portion and lower arm changeover portion.
3. ultra wide band electromagnetic assembled TEM electromagnetic horn according to claim 2, wherein upper arm changeover portion is ladder plane；
Lower arm changeover portion is clinoplain；The medium gasket is wedge structure.
4. ultra wide band electromagnetic assembled TEM electromagnetic horn according to claim 2, wherein the width of the upper arm changeover portion
Self feeding end is to the linear variation in mouth face, and range of linearity is 1.5mm-12.01mm；The width of the upper arm elliptic curve section
Self feeding end is spent to the linear variation in mouth face, and range of linearity is 12.01mm-150mm.
5. ultra wide band electromagnetic assembled TEM electromagnetic horn according to claim 2, wherein the upper arm changeover portion and described
The spacing self feeding end of lower arm changeover portion to the variation range at mouth face end be 1.08mm-3.75mm；The lower arm elliptic curve section
Width self feeding end to the linear variation in mouth face, range of linearity 3.75mm-150mm.
6. ultra wide band electromagnetic assembled TEM electromagnetic horn according to claim 1, wherein further include:
Parasitic minor matters are convex structure；The parasitism minor matters first end is connected with the upper ledge of the Contraband shape box, the parasitism
Minor matters second end is connected with the TEM loudspeaker upper arm.
7. ultra wide band electromagnetic assembled TEM electromagnetic horn according to claim 6, wherein the width of the parasitism minor matters is certainly
Feed end to the variation range at mouth face end be 53.407mm-150mm.
8. ultra wide band electromagnetic assembled TEM electromagnetic horn according to claim 1, wherein the TEM loudspeaker upper arm and TEM
Loudspeaker lower arm is not symmetrical, and the height of the TEM loudspeaker upper arm is greater than the height of the TEM loudspeaker lower arm.
9. a kind of parameter determination method of ultra wide band electromagnetic assembled TEM electromagnetic horn, wherein include:
Step S100: the impedance variations of calculating feed end to mouth face end；
Step S200: the gradient ramp elliptic curve of TEM loudspeaker is determined, and TEM loudspeaker upper arm and TEM loudspeaker lower arm be not opposite
Claim；
Step S300: the arc-shaped parasitic minor matters of installation；
Step S400: adjustment and optimization changeover portion parameter weld sub-miniature A connector and the paste medium gasket at feed.
10. the parameter determination method of ultra wide band electromagnetic assembled TEM electromagnetic horn according to claim 9, wherein the step
Include: in rapid S200
Upper arm elliptic curve section and lower arm elliptic curve section difference are as follows:
Wherein, z1For the height that upper arm elliptic curve section changes with x, z2For the height that lower arm elliptic curve section changes with x, x is upper
Arm transition section length or lower arm transition section length；
The width self feeding end of the TEM loudspeaker upper arm is to the linear variation in mouth face, until with the upper ledge of the Contraband shape box
Width is equal；The width self feeding end of the TEM loudspeaker lower arm is constant to mouth face end.
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| CN112366455A (en) * | 2020-10-29 | 2021-02-12 | 中国电子科技集团公司第二十研究所 | Asymmetric double-ridge horn antenna |
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Application publication date: 20190503 |