CN208336521U - A kind of Sidelobe rectangular groove waveguide slot antenna - Google Patents
A kind of Sidelobe rectangular groove waveguide slot antenna Download PDFInfo
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- CN208336521U CN208336521U CN201820987709.9U CN201820987709U CN208336521U CN 208336521 U CN208336521 U CN 208336521U CN 201820987709 U CN201820987709 U CN 201820987709U CN 208336521 U CN208336521 U CN 208336521U
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- conductor plate
- rectangular groove
- groove waveguide
- gap
- slot antenna
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Abstract
The utility model discloses a kind of Sidelobe rectangular groove waveguide slot antenna, the technical issues of solution: the higher technical problem of the level of the minor lobe of slot antenna in the prior art mentioned in the background art.The technical solution taken, a kind of Sidelobe rectangular groove waveguide slot antenna, including rectangular groove waveguide and terminal short circuit plate；Rectangular groove waveguide includes upper conductor plate, lower conductor plate and two dielectric support blocks；It outwardly protrudes to form the first rectangular projections in the middle part of upper conductor plate；Terminal short circuit plate is located at one end of rectangular groove waveguide and closes the end seal；It is equipped with slot array in the upper surface of the first rectangular projections, slot array is made of a plurality of R-joining gap.Advantage: this slot antenna, using the tendency gap by "eight" shape, compared with parallel slit, in the suitable situation of selected angle, main lobe width is relatively narrow, while reducing the level of minor lobe.
Description
Technical field
The utility model relates to a kind of Sidelobe rectangular groove waveguide slot antennas.
Background technique
Slot antenna is that elongated gap is opened on the metallic conductor wall of transmission electromagnetic wave, and electromagnetic wave passes through gap to outer space
Between radiate, and formed a kind of aperture antenna.Crack the day to be formed on the conductor surface of coaxial line, waveguide or cavity resonator
Line, also referred to as slot antenna.Waveguide slot antenna was since its is small in size, feed convenience, sound construction, high reliability in recent years
The features such as be widely applied.
However involving submillimeter wave wave band in millimeter, waveguide dimensions are smaller, make slot antenna using it, increase processing
Difficulty and at high cost, transmission loss are also increased with working frequency and are increased sharply.Nineteen fifty-two, Tischer.F.J proposed slot wave
The concept led, groove waveguides have the characteristics that low-loss, low dispersion, large scale, high power capacity, in millimeter wave and submillimeter wave wave
Section can substitute traditional waveguide.Have devised corresponding antenna on the basis of some groove waveguides successively in recent years, such as round
Shape groove waveguides slot antenna.And rectangular groove waveguide is widely used, but does not have the respective antenna designed on its basis also so far.
Multiple gaps can form antenna array, and antenna array increases the radiation energy of main radiation direction, while other
Some directions are also enhanced.Directional diagram is the relative size of the radiation intensity of antenna in all directions, and main radiation direction is
The greatest irradiation direction of antenna, main lobe, other directions are minor lobe, are that the level of minor lobe is higher, the factor for influencing minor lobe is more, low
Minor lobe is a major issue of Antenna Design.
Utility model content
Technical problem to be solved in the utility model is slot antenna in the prior art mentioned in the background art
The higher technical problem of the level of minor lobe.
To solve the above problems, technical solution adopted in the utility model is:
A kind of Sidelobe rectangular groove waveguide slot antenna, including rectangular groove waveguide and terminal short circuit plate；
Rectangular groove waveguide includes upper conductor plate, lower conductor plate and two dielectric support blocks, upper conductor plate and lower conductor plate phase
Mutual parallel and symmetrical setting, the interval between upper conductor plate and lower conductor plate are arranged and apart from fixation；
Pass through two dielectric support block supports, upper conductor plate, lower conductor plate and two between upper conductor plate and lower conductor plate
Space between dielectric support block constitutes rectangular groove waveguide；It outwardly protrudes to form the first rectangle protrusion in the middle part of upper conductor plate
Portion outwardly protrudes to form the second rectangular projections identical with the first rectangular projections in the middle part of lower conductor plate；
Terminal short circuit plate is located at one end of rectangular groove waveguide and closes the end seal；
It is equipped with slot array in the upper surface of the first rectangular projections, slot array is made of a plurality of R-joining gap, more
R-joining gap constitutes a "eight" shape per adjacent two R-joining gaps and per adjacent two along longitudinal transmission distribution of rectangular groove waveguide
The vertical range between two R-joining gap central points in R-joining gap is half of waveguide wavelength；In the R-joining gap of all R-joining gaps
Heart point is respectively positioned on a longitudinal centre line, which is the axis of transmission line, each R-joining gap and longitudinal centre line
Between be formed slopely angle.
The pairs of appearance of multiple R-joining gaps of technical solutions of the utility model, each pair of R-joining gap is respectively with respective slit centers
Point is dot, is rotated both clockwise and counterclockwise certain angle respectively, constitutes a pair of of "eight" shape, constitutes splay every opposite joint
The length of gap is identical with selected angle, and the gap length and rotation angle of other " eight " words pair can vary slightly.
The electromagnetic field that multiple R-joining gaps are formed in space, is overlapped mutually each other, and certain direction electromagnetic fields increase with phase
Intense radiation, certain direction electromagnetism are field-reversed and cancel out each other, or even offsetting is zero.In the length of R-joining gap, selected angle is suitable
In the case where, it is main spoke that in main radiation direction, the electromagnetic field of multiple oblique gap radiations, which is same phase, and increasing degree is maximum
Direction, other directions are penetrated, the mutual reverse phase of electromagnetic field of multiple oblique gap radiations cancels out each other and reduces radiation field, constitutes low
Minor lobe slot array.
The length of multiple R-joining gaps of technical solutions of the utility model can be equal or not all equal.Multiple R-joining gaps and biography
The angle of the axis of defeated line can be equal or not all equal.
Preferably, two dielectric support blocks are located at the both sides of the edge of rectangular groove waveguide, and two dielectric support blocks pass through
Screw connects upper conductor plate and lower conductor plate.
Preferably, angle is 15 ° -20 °.Multiple R-joining gaps and the angle of the axis of transmission line can equal or not all phases
Deng.
Preferably, upper conductor plate and lower conductor plate be all made of copper at.Increase the conductivity of inner surface using copper.
Preferably, silver is coated in the inner surface of upper conductor plate and lower conductor plate.Pass through the silver-plated conduction for increasing inner surface
Rate, to further decrease transmission loss.
The utility model proposes a kind of production methods in electromagnetic radiation gap, characterized in that the following steps are included:
1) upper conductor plate, lower conductor plate and two dielectric support blocks are assembled and constitute rectangular groove waveguide；
2) rectangular groove waveguide is fixed on milling machine table face with frock clamp；
3) center line for being parallel to electromagnetic transmission direction is determined on the first rectangular projections upper surface in upper conductor plate；
4) multiple points are chosen according to predetermined length on centerline, defining this point is slit centers point；Predetermined length root
It is determined according to the working frequency of antenna；
5) rectangular groove waveguide is rotated in the forward direction to certain angle using first slit centers point as the center of circle along center line, milled
Knife horizontal movement, on the first rectangular projections upper surface one gap of horizontal processing in upper conductor plate for milling cutter, and the gap is in
Heart line has certain angle；
6) after completing step 5, rectangular groove waveguide opposite direction is rotated, the direction of starting is returned to；
7) rectangular groove waveguide is reversely rotated to certain angle using second slit centers point as the center of circle along center line, milled
Knife horizontal movement, on the first rectangular projections upper surface one gap of horizontal processing in upper conductor plate for milling cutter, and the gap is in
Heart line has certain angle；
8) after completing step 7, rectangular groove waveguide positive direction is rotated, the direction of starting is returned to；
9) step 5) is repeated to step 8), is continued with milling machine and is processed other gaps.
The working principle of the utility model slot antenna are as follows: electromagnetic wave is inputted from the open port of rectangular groove waveguide, transmission
It is reflected when to closed port by terminal short circuit plate, forms standing wave in transmission slot, each gap is in the electric field antinode of standing wave
Point, to generate electromagnetic wave by gap to external radiation, forms waveguide since gap changes the distribution of waveguide inner surface electric current
Slot antenna.The resonance frequency of antenna determines by the length in gap, and the length of general slot antenna is half-wavelength, each gap it
Between at a distance of half of waveguide wavelength, the electromagnetic field phase of generation is identical.
The electromagnetic field that multiple R-joining gaps are formed in space, is overlapped mutually each other, and certain direction electromagnetic fields increase with phase
Intense radiation, certain direction electromagnetism are field-reversed and cancel out each other, or even offsetting is zero.The minor lobe control of usual antenna array is antenna array
One emphasis of research.It is tilted using the axis of R-joining gap and transmission line, in the suitable situation of selected angle, in main radiation side
To it is main radiation direction that the electromagnetic field of multiple oblique gap radiations, which is same phase, and increasing degree is maximum, and other directions are multiple oblique
The mutual reverse phase of the electromagnetic field of gap radiation, cancels out each other and reduces radiation field, constitutes Sidelobe slot array.
The beneficial effects of the utility model are:
1, this Sidelobe rectangular groove waveguide slot antenna is believed using rectangular groove waveguide as millimeter wave, submillimeter wave microwave
Number transmission line, the electromagnetic wave of relatively high power can be transmitted.A plurality of R-joining gap is distributed along longitudinal direction, and the slit centers point of R-joining gap is vertical
To on center line, R-joining gap and the certain angle of centerline dip constitute slot array, and main radiation direction radiation can be enhanced
Field strength, while the relative level of minor lobe is reduced, in millimeter wave, submillimeter wave.In millimeter wave, submillimeter wave wave band, rectangular waveguide
Big etc. traditional transmission line loss, power capacity is low, and with decaying, small, dispersion is low, function compared with them for groove waveguides at present
The features such as rate capacity is high, easy to process realizes slot antenna using rectangular groove waveguide, can be realized applying in milli for relatively high power
The slot antenna of metric wave, submillimeter wave wave band；Multiple gap cophase detectors generate biggish electric field in Main way, increase
Total radiant power improves the directionality of antenna；Common slot antenna, gap are generally parallel with axis.
2, this Sidelobe rectangular groove waveguide slot antenna, using the tendency gap by "eight" shape, compared with parallel slit,
In the suitable situation of selected angle, main lobe width is relatively narrow, while reducing the level of minor lobe.
Detailed description of the invention
Fig. 1 is the top view of the utility model Sidelobe rectangular groove waveguide slot antenna.
Fig. 2 is the sectional view in Fig. 1 along A-A.
Fig. 3 is the part schematic diagram of terminal short circuit plate.
Fig. 4 is the procedure of processing procedure chart one of R-joining gap.
Fig. 5 is the procedure of processing procedure chart two of R-joining gap.
Fig. 6 is the procedure of processing procedure chart three of R-joining gap.
Fig. 7 is the procedure of processing procedure chart four of R-joining gap.
Fig. 8 is the scale diagrams of rectangular groove waveguide in the present embodiment.
Fig. 9 is the scale diagrams of R-joining gap in the present embodiment.
Figure 10 is the radiation analogous diagram of the present embodiment Sidelobe rectangular groove waveguide slot antenna.
Figure 11 is the slot antenna in the present embodiment Sidelobe rectangular groove waveguide slot antenna after main gap length variation
Radiate analogous diagram.
Specific embodiment
Technical solutions of the utility model are described in detail below, but the protection scope of the utility model is not limited to
The embodiment.
To keep the content of the utility model more obvious and easy to understand, below in conjunction with attached drawing 1- Figure 11 and specific embodiment do into
The description of one step.
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only to explain this
Utility model is not used to limit the utility model.
As illustrated in fig. 1 and 2, Sidelobe rectangular groove waveguide slot antenna in the present embodiment, including rectangular groove waveguide and terminal
Short board 5.It should be noted that being the length direction of rectangular groove waveguide, i.e. electromagnetic transmission side along the direction of arrow R in Fig. 1
To, along the direction of arrow W be rectangular groove waveguide width direction.
As illustrated in fig. 1 and 2, rectangular groove waveguide includes upper conductor plate 1, lower conductor plate 2 and two dielectric support blocks 3, is above led
Body plate 1 and lower conductor plate 2 are parallel to each other and are symmetrical arranged, and the interval between upper conductor plate 1 and lower conductor plate 2 is arranged and apart from solid
It is fixed；It is supported between upper conductor plate 1 and lower conductor plate 2 by two dielectric support blocks 3, two dielectric support blocks 3 are located at square
The both sides of the edge of shape groove waveguides, and be located at upper conductor plate 1 and lower conductor plate 2 edge, the distribution arrangement of dielectric support block with it is convex
The extending direction of shape plate is parallel.It is respectively provided with screw hole 4 in upper conductor plate 1 and lower conductor plate 2, two dielectric support blocks 3 pass through spiral shell
Nail connection upper conductor plate 1 and lower conductor plate 2.
Upper conductor plate 1 and lower conductor plate 2 all in accordance with copper at.Copper sheet is in order to increase the conductivity of inner surface.In upper conductor
The inner surface of plate 1 and lower conductor plate 2 is coated with silver.By the silver-plated conductivity for increasing inner surface, to further decrease transmission
Loss.
As illustrated in fig. 1 and 2, the space between upper conductor plate 1, lower conductor plate 2 and two dielectric support blocks 3 constitutes rectangle
Groove waveguides, this rectangular groove waveguide are electromagnetic transmission slot.
As illustrated in fig. 1 and 2, it outwardly protrudes to form the first rectangular projections in the middle part of upper conductor plate 1, in lower conductor plate 2
Portion outwardly protrudes to form the second rectangular projections identical with the first rectangular projections.
As shown in figs. 1 and 3, terminal short circuit plate 5 is welded on one end of rectangular groove waveguide and closes the end seal, passes electromagnetic wave
It is defeated slot one end open, closed at one end.Terminal short circuit plate 5 is also copper sheet in the present embodiment, shape and rectangular groove waveguide it is transversal
Face shape is identical, just the port of enclosing square groove waveguides.
As shown in Figure 1, being equipped with slot array in the upper surface of the first rectangular projections, slot array is by a plurality of R-joining
Gap 6 forms, and a plurality of R-joining gap 6 constitutes " eight " word per adjacent two R-joining gaps 6 along longitudinal transmission distribution of rectangular groove waveguide
The vertical range between two R-joining gap central points in shape and every adjacent two R-joining gaps 6 is half of waveguide wavelength；It is all oblique
The R-joining gap central point in gap 6 is respectively positioned on a longitudinal centre line, which is the axis of transmission line, each R-joining
Angle is formed slopely between gap 6 and longitudinal centre line.Angle is 15 ° -20 °, and the preferred angle of the present embodiment is 18 °.Multiple R-joinings
The length of gap can be equal or not all equal.Multiple R-joining gaps can be equal or not all equal with the angle of the axis of transmission line.
As shown in Figure 1, the pairs of appearance of multiple R-joining gaps, each pair of R-joining gap respectively using respective slit centers point as dot,
It is rotated both clockwise and counterclockwise certain angle respectively, constitutes a pair of of "eight" shape, constitutes the length in splay each pair of gap
Identical with selected angle, the gap length and rotation angle of other " eight " words pair can vary slightly.
The electromagnetic field that multiple R-joining gaps are formed in space, is overlapped mutually each other, and certain direction electromagnetic fields increase with phase
Intense radiation, certain direction electromagnetism are field-reversed and cancel out each other, or even offsetting is zero.In the length of R-joining gap, selected angle is suitable
In the case where, it is main spoke that in main radiation direction, the electromagnetic field of multiple oblique gap radiations, which is same phase, and increasing degree is maximum
Direction, other directions are penetrated, the mutual reverse phase of electromagnetic field of multiple oblique gap radiations cancels out each other and reduces radiation field, constitutes low
Minor lobe slot array.
As shown in fig. 3 to 7, the production method in one of the present embodiment electromagnetic radiation gap, comprising the following steps:
1) upper conductor plate 1, lower conductor plate 2 and two dielectric support blocks 3 are assembled and constitute rectangular groove waveguide.
2) rectangular groove waveguide is fixed on milling machine table face with frock clamp；The frock clamp referred in this step is
Conventional tooling in the art.
3) center for being parallel to electromagnetic transmission direction is determined on first rectangular projections upper surface in upper conductor plate 1
Line.
4) multiple points are chosen according to predetermined length on centerline, defining this point is slit centers point；Predetermined length root
It is determined according to the working frequency of antenna.
5) rectangular groove waveguide is rotated in the forward direction to certain angle using first slit centers point as the center of circle along center line, milled
Knife horizontal movement, on first rectangular projections upper surface one gap of horizontal processing in upper conductor plate 1 for milling cutter, and the gap is in
Heart line has certain angle.
6) after completing step 5), rectangular groove waveguide opposite direction is rotated, the direction of starting is returned to.
7) rectangular groove waveguide is reversely rotated to certain angle using second slit centers point as the center of circle along center line, milled
Knife horizontal movement, on first rectangular projections upper surface one gap of horizontal processing in upper conductor plate 1 for milling cutter, and the gap is in
Heart line has certain angle.
8) after completing step 7), rectangular groove waveguide positive direction is rotated, the direction of starting is returned to.
9) step 5) is repeated to step 8), is continued with milling machine and is processed other gaps.
It as shown in FIG. 8 and 9, is a specific embodiment of the utility model, the width of rectangular groove waveguide is 25mm, up and down
Protrusion height is 4.5mm, and the height of flat is 1.5mm, and the width for protruding part is 5mm, the width of media of both sides supporting block
Degree is 5mm, and three pairs in total of "eight" shape gap, the length in gap is 3mm, and the angle of gap and axis is 18 °, in each gap
Spacing between the heart is 3mm, operating center frequency 50GHz.It is emulated using 3 D electromagnetic simulation software HFSS, this implementation
The gain of example is as shown in Figure 10, is greatest irradiation direction perpendicular to the face where electromagnetic radiation gap, and gain reaches
11.26dB.Gap length is identical, and the gain that gap is parallel to the slot array of axis is as shown in figure 11, gain 6.70dB,
Minor level is also higher.
Change electromagnetic radiation gap away from, or change electromagnetic radiation gap arrive closed terminal distance, and stitch
Angle between gap and axis, all can radiation direction to electromagnetic wave and radiation intensity have an impact.The utility model is applicable
In other frequency ranges of millimeter wave, submillimeter wave, frequency transformation, the size of rectangular groove waveguide can corresponding change, electromagnetic radiation
The size in gap, position can also be adjusted according to using needs.
Be not specifically noted in all the utility model specifications be the prior art or can by existing technology
It realizes, it should be appreciated that for those of ordinary skills, it can be modified or changed according to the above description, and
All these modifications and variations all should belong to the protection scope of the appended claims for the utility model.
Claims (5)
1. a kind of Sidelobe rectangular groove waveguide slot antenna, it is characterised in that: including rectangular groove waveguide and terminal short circuit plate (5)；
Rectangular groove waveguide includes upper conductor plate (1), lower conductor plate (2) and two dielectric support blocks (3), upper conductor plate (1) and under
Conductor plate (2) is parallel to each other and is symmetrical arranged, and the interval between upper conductor plate (1) and lower conductor plate (2) is arranged and apart from fixation；
Pass through two dielectric support block (3) supports, upper conductor plate (1), lower conductor between upper conductor plate (1) and lower conductor plate (2)
Space between plate (2) and two dielectric support blocks (3) constitutes rectangular groove waveguide；It is outwardly protruded in the middle part of upper conductor plate (1)
The first rectangular projections are formed, outwardly protrude to form the second square identical with the first rectangular projections in the middle part of lower conductor plate (2)
Shape protrusion；
Terminal short circuit plate (5) is located at one end of rectangular groove waveguide and closes the end seal；
It is equipped with slot array in the upper surface of the first rectangular projections, slot array is made of a plurality of R-joining gap (6), a plurality of
R-joining gap (6) constitutes a "eight" shape and every phase per adjacent two R-joining gaps (6) along longitudinal transmission distribution of rectangular groove waveguide
The vertical range between two R-joining gap central points on adjacent two R-joining gaps (6) is half of waveguide wavelength；All R-joining gaps (6)
R-joining gap central point be respectively positioned on a longitudinal centre line, the longitudinal centre line be transmission line axis, each R-joining gap (6)
Angle is formed slopely between longitudinal centre line.
2. Sidelobe rectangular groove waveguide slot antenna according to claim 1, which is characterized in that two dielectric support blocks
(3) be located at the both sides of the edge of rectangular groove waveguide, two dielectric support blocks (3) be connected by screw to upper conductor plate (1) and under
Conductor plate (2).
3. Sidelobe rectangular groove waveguide slot antenna according to claim 1, which is characterized in that angle is 15 ° -20 °.
4. Sidelobe rectangular groove waveguide slot antenna according to claim 1, which is characterized in that upper conductor plate (1) and under
Conductor plate (2) be all made of copper at.
5. Sidelobe rectangular groove waveguide slot antenna according to claim 4, which is characterized in that in upper conductor plate (1) and
The inner surface of lower conductor plate (2) is coated with silver.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820987709.9U CN208336521U (en) | 2018-06-25 | 2018-06-25 | A kind of Sidelobe rectangular groove waveguide slot antenna |
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| CN201820987709.9U CN208336521U (en) | 2018-06-25 | 2018-06-25 | A kind of Sidelobe rectangular groove waveguide slot antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847535A (en) * | 2018-06-25 | 2018-11-20 | 南京信息职业技术学院 | A kind of Sidelobe rectangular groove waveguide slot antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108847535A (en) * | 2018-06-25 | 2018-11-20 | 南京信息职业技术学院 | A kind of Sidelobe rectangular groove waveguide slot antenna |
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