CN103700938A - Full metal circular polarization and liner polarization 8-shaped wave beam antenna of millimeter wave - Google Patents
Full metal circular polarization and liner polarization 8-shaped wave beam antenna of millimeter wave Download PDFInfo
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Abstract
The invention discloses a full metal circular polarization and liner polarization 8-shaped wave beam antenna of a millimeter wave. Two antenna radiation units are respectively mounted on two rectangular feed waveguides which are connected or not connected with each other; the two rectangular feed waveguides are connected with a double-T-shaped waveguide splitter; each antenna radiation unit is provided with a cross-shaped coupling gap; a pair of isosceles triangle radiation slots which are distributed in a central symmetry way are formed in the two diagonal line directions and positioned on the upper surface of a rectangular radiation cavity; the rectangular radiation cavity is fixed above the cross-shaped coupling gap; the arm E and the arm H of the double-T-shaped waveguide splitter are input ends; the two side arms are respectively connected with two hollow conducting cavities. According to the antenna disclosed by the invention, the 8-shaped wave beam shape and width are realized by adjusting an angle; full metal can be used for extremely harsh environments, such as low-temperature and high-temperature environments; meanwhile, the full metal circular polarization and liner polarization 8-shaped wave beam antenna of the millimeter wave has the advantages of compact structure, low side lobe and back lobe, wide application range, low requirement for machining precision, easiness in implementation, low cost and the like, and is very suitable for millimeter-wave band.
Description
Technical field
The present invention relates to a kind of antenna of millimeter wave, especially relate to a kind of all-metal circular polarization and linear polarization figure of eight beam antenna of millimeter wave.
Background technology
The research early start of slot antenna is the forties in 20th century.Nineteen forty-six, H. G. Booker has proposed the concept of slot antenna, but is not causing widely and noting at that time.Along with the development of research, the efficiency that Waveguide slot antenna has due to itself is high, compact conformation, and Aperture distribution can independently be controlled, and processes and install the advantages such as simple, has obtained paying attention to widely and applying.At present, the slot antenna of waveguide feed on ground, the field such as carrier-borne, airborne, navigation, meteorology, aviation management, beacon and airborne radar is widely used.The Waveguide slot antenna having come into operation is at present mainly at military aspect, comprising Muscovite " pearl " airborne fire control radar, Marconi Co. and the X-band satellite SAR of Korea S's joint research and development, Canadian spaceborne RadarSAT etc.The Small-slotted Planar Antenna Array that parabolic antenna in airborne radar is now generally cracked by waveguide broadside substitutes.China has also been successfully applied to Small-slotted Planar Antenna Array technology the fields such as airborne fire control radar, UAV system SAR, and the antenna travelling wave array technology of also successfully being cracked in Narrow Wall of Waveguide limit is applied to the fields such as airborne early warn ing radar with ultralow secondary lobe.
Because Waveguide slot antenna has advantages of many uniquenesses, have broad application prospects, so the research of Waveguide slot antenna is subject to people's attention always.In recent years, in order to adapt to the equipment such as radar and missile guidance for the requirement of antenna polarization performance, people have done particular study to the polarization characteristic of Waveguide slot antenna.2003, T.Hirano, J.Hirokawa etc. adopt the form of opening intersection seam at waveguide broadside under waveguide terminal short-circuit conditions, and at radiating slot and terminal room, adopt to intersect to stitch and mate, and utilize moment method to analyze aerial array, having realized standing wave is 5.6 % in the bandwidth below 1.5, is being concerned about that angle build-in test axial ratio is less than the circular polarized antenna of 1.5 dB.2004, Giorgio Momisci, the propositions such as Giuseppe Mazzarella are cracked at rectangular waveguide broadside, form class is similar to T shape, from waveguide one end feed, at the other end, mate, can realize respectively left-handed and right-handed circular polarization, documents adjust two gaps length, distance and angle can realize axial ratio and be less than 0.2 dB in main radiation direction.Subsequently, in 2006, G.Mongtisci was designed to circular polarization gap array by the circular polarization slot element expansion of the similar T shape of designing in the early time.2011, the people such as Mehdi Salari have designed a kind of novel waveguide slot antenna unit and array structure, antenna element comprises a rectangle feed waveguide and a radiating element, X-type coupling slot is opened in position in Guide of Wide Wall disalignment 1/4th length, V-type radiation fluting by Energy Coupling to radiating element, the circular polarization that has realized Narrow Wall of Waveguide edge direction, secondary lobe is very low, and axial ratio is less than 0.5 dB.
Yet above-mentioned Waveguide slot antenna structure only realizes and has done corresponding research for circular polarization, inevitably can run into certain limitation while being applied to the application such as airborne radar.An important application of airborne radar is that dynamic object detects, the ability that modern war and struggle against terror detect moving-target to airborne radar has proposed requirements at the higher level, not only need to improve airborne radar in the moving-target detectability in secondary lobe clutter district, the more important thing is the moving-target detectability that should possess in main-lobe clutter district, this just needs antenna to synthesize and difference beam implementation space, and in antenna beam shape, has particular requirement.Survey the target of different angles simultaneously, just need antenna on special angle, to there is greatest irradiation, conventionally can adopt broad beam antenna or class figure of eight beam antenna structure.At present, in millimere-wave band, utilize waveguiding structure design broadband circle polarized relative less with the report of linear polarization figure of eight beam antenna, performance is also not ideal enough, and this has limited to its application prospect aspect Aero-Space, airborne radar.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, designed a kind of all-metal circular polarization and linear polarization figure of eight beam antenna of millimeter wave.
Technical scheme of the present invention is:
One, a kind of all-metal circular polarization of millimeter wave and linear polarization figure of eight beam antenna
The present invention includes two rectangle feed waveguides, two antenna radiation units and double-T shaped Waveguide branching device; Two antenna radiation units are arranged on respectively on two interconnective rectangle feed waveguides, the input of two rectangle feed waveguides is connected with two outputs of double-T shaped Waveguide branching device respectively, and the angle that two rectangle feed waveguides are interconnected to form is 0 ~ 180 degree.
Two described rectangle feed waveguides: one end is hollow conduction cavity, two rectangle feed waveguide other ends are same short circuit metal piece, it is 0 ~ 180 degree that two hollow conduction cavitys are connected to the angle forming on short circuit metal piece, on the wide wall of hollow conduction cavity, have cross coupling gap, the central point in cross coupling gap is positioned on hollow conduction cavity broadside perpendicular bisector, the cross direction in cross coupling gap all with hollow conduction cavity broadside perpendicular bisector in angle of 45 degrees;
Described antenna radiation unit: the rectangular radiation cavity upper surface of antenna radiation unit is respectively provided with along two diagonals the isosceles triangle radius that a pair of Central Symmetry is arranged, the summit positioned opposite of two isosceles triangle radius of a pair of isosceles triangle radius, the perpendicular bisector on isosceles triangle radius base is all located on the diagonal of rectangular radiation chamber upper surface, and rectangular radiation cavity is fixed on directly over the cross coupling gap of rectangle feed waveguide;
Described double-T shaped Waveguide branching device: the E arm of double-T shaped Waveguide branching device and H arm are input, two side arms are output, two side arms of double-T shaped Waveguide branching device are connected by extending waveguide with two hollow conduction cavitys of rectangle feed waveguide respectively.
The center superposition in the center of described rectangular radiation cavity bottom surface and cross coupling gap.
Four jiaos of described rectangular radiation cavity are screwed in directly over the cross coupling gap of rectangle feed waveguide, and screw is flat head screw.
Two described rectangle feed waveguides, two antenna radiation units and double-T shaped Waveguide branching device are metal material.
Two, the all-metal circular polarization of another kind of millimeter wave and linear polarization figure of eight beam antenna
The present invention includes two rectangle feed waveguides, two antenna radiation units and double-T shaped Waveguide branching device; Two antenna radiation units are arranged on respectively on two rectangle feed waveguides, and the input of two rectangle feed waveguides is connected with the two ends of double-T shaped Waveguide branching device output respectively, and the angle forming between two rectangle feed waveguides is 0 ~ 180 degree.
Two described rectangle feed waveguides: one end is hollow conduction cavity, the other end is short circuit metal piece, on the wide wall of hollow conduction cavity, have cross coupling gap, the central point in cross coupling gap is positioned on hollow conduction cavity broadside perpendicular bisector, the cross direction in cross coupling gap all with hollow conduction cavity broadside perpendicular bisector in angle of 45 degrees;
Described antenna radiation unit: the rectangular radiation cavity upper surface of antenna radiation unit is respectively provided with along two diagonals the isosceles triangle radius that a pair of Central Symmetry is arranged, the summit positioned opposite of two isosceles triangle radius of a pair of isosceles triangle radius, the perpendicular bisector on isosceles triangle radius base is all located on the diagonal of rectangular radiation chamber upper surface, and rectangular radiation cavity is fixed on directly over the cross coupling gap of rectangle feed waveguide;
Described double-T shaped Waveguide branching device: the E arm of double-T shaped Waveguide branching device and H arm are input, two side arms are output, two side arms of double-T shaped Waveguide branching device are connected with two hollow conduction cavitys of rectangle feed waveguide respectively, and the angle forming between two rectangle feed waveguides is 0 ~ 180 degree.
The center superposition in the center of described rectangular radiation cavity bottom surface and cross coupling gap.
Four jiaos of described rectangular radiation cavity are screwed in directly over the cross coupling gap of rectangle feed waveguide, and screw is flat head screw.
Two described rectangle feed waveguides, two antenna radiation units and double-T shaped Waveguide branching device are metal material.
Compared with prior art, the beneficial effect that the present invention has is:
Compact conformation of the present invention, secondary lobe and back lobe are low, good directionality, owing to not there is not dielectric loss, antenna radiation efficiency can effectively improve, and especially, for the occasion of large scale, high-gain, the raising of antenna radiation efficiency is highly significant especially.
This structure can produce the beam shape of the figure of eight wave beam of special angle, can realization and wave beam and difference beam select, be very suitable for the application such as guided missile, radar detection.
Secondly, can realize circular polarization and the linear polarization in broadband, applied widely.
Again, antenna only needs metal processing, so requirement on machining accuracy is low, realizes simply low cost.Its all-metal construction, can be used for extreme environment, as low temperature and hot environment.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first antenna structure of the present invention.
Fig. 2 is the elevation cross-sectional view of Fig. 1.
Fig. 3 is the structural representation of rectangle feed waveguide.
Fig. 4 is the plan structure schematic diagram of rectangle feed waveguide.
Fig. 5 is the plan structure schematic diagram of antenna radiation unit.
Fig. 6 is the structure for amplifying schematic diagram of rectangular radiation chamber upper surface.
Fig. 7 is double-T shaped splitter structural representation.
Fig. 8 is the structural representation of the second antenna structure of the present invention.
Fig. 9 is the elevation cross-sectional view of Fig. 8.
Figure 10 is embodiment of the present invention circular polarization return loss experimental result.
Figure 11 is embodiment of the present invention Circular polarization ratio experimental result.
Figure 12 is embodiment of the present invention figure of eight wave beam design result.
In figure: 1, rectangle feed waveguide, 2, antenna radiation unit, 3, double-T shaped Waveguide branching device, 11, hollow conduction cavity, 12, cross coupling gap, 13, short circuit metal piece, 21, rectangular radiation cavity, 22, isosceles triangle radius, 23, screw hole, 31, E arm, 32, H arm, 33, side arm.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
As shown in Figure 1 and Figure 2, a kind of antenna structure of the present invention comprises two rectangle feed waveguides 1, two antenna radiation units 2 and double-T shaped Waveguide branching devices 3; Two antenna radiation units 2 are arranged on respectively on two interconnective rectangle feed waveguides 1, the input of two rectangle feed waveguides 1 is connected with two outputs of double-T shaped Waveguide branching device 3 respectively, and the angle that two rectangle feed waveguides 1 are interconnected to form is 0 ~ 180 degree.
As shown in Figure 3, Figure 4, two described rectangle feed waveguides 1: one end is hollow conduction cavity 11, two rectangle feed waveguide 1 other ends are same short circuit metal piece 13, it is 0 ~ 180 degree that two hollow conduction cavitys 11 are connected to the angle forming on short circuit metal piece 13, on the wide wall of hollow conduction cavity 11, have cross coupling gap 12, the central point in cross coupling gap 12 is positioned on hollow conduction cavity 11 broadside perpendicular bisectors, the cross direction in cross coupling gap 12 all with hollow conduction cavity 11 broadside perpendicular bisectors in angle of 45 degrees;
As shown in Figure 5, Figure 6, described antenna radiation unit 2: rectangular radiation cavity 21 upper surfaces of antenna radiation unit 2 are respectively provided with along two diagonals the isosceles triangle radius 22 that a pair of Central Symmetry is arranged, the summit positioned opposite of two isosceles triangle radius 22 of a pair of isosceles triangle radius 22, the perpendicular bisector on isosceles triangle radius 22 bases is all located on the diagonal of rectangular radiation chamber 21 upper surfaces, and rectangular radiation cavity 21 is fixed on directly over the cross coupling gap 12 of rectangle feed waveguide 1;
As shown in Figure 7, described double-T shaped Waveguide branching device 3: the E arm 31 of double-T shaped Waveguide branching device 3 and H arm 32 are input, two side arms 33 are output, and two side arms 33 of double-T shaped Waveguide branching device 3 are connected by extending waveguide with two hollow conduction cavitys 11 of rectangle feed waveguide 1 respectively.
The center superposition in the center of described rectangular radiation cavity 21 bottom surfaces and cross coupling gap 12.
Four jiaos of described rectangular radiation cavity 21 are screwed in directly over the cross coupling gap 12 of rectangle feed waveguide 1, and screw is flat head screw.
Described two rectangle feed waveguides 1, two antenna radiation units 2 and double-T shaped Waveguide branching device 3 are metal material.
As shown in Figure 8, Figure 9, another kind of antenna structure of the present invention comprises two rectangle feed waveguides 1, two antenna radiation units 2 and double-T shaped Waveguide branching devices 3; Two antenna radiation units 2 are arranged on respectively on two rectangle feed waveguides 1, and the input of two rectangle feed waveguides 1 is connected with the two ends of double-T shaped Waveguide branching device 3 outputs respectively, and the angle forming between two rectangle feed waveguides 1 is 0 ~ 180 degree.
As shown in Figure 3, Figure 4, two described rectangle feed waveguides 1: one end is hollow conduction cavity 11, the other end is short circuit metal piece 13, on the wide wall of hollow conduction cavity 11, have cross coupling gap 12, the central point in cross coupling gap 12 is positioned on hollow conduction cavity 11 broadside perpendicular bisectors, the cross direction in cross coupling gap 12 all with hollow conduction cavity 11 broadside perpendicular bisectors in angle of 45 degrees;
As shown in Figure 5, Figure 6, described antenna radiation unit 2: rectangular radiation cavity 21 upper surfaces of antenna radiation unit 2 are respectively provided with along two diagonals the isosceles triangle radius 22 that a pair of Central Symmetry is arranged, the summit positioned opposite of two isosceles triangle radius 22 of a pair of isosceles triangle radius 22, the perpendicular bisector on isosceles triangle radius 22 bases is all located on the diagonal of rectangular radiation chamber 21 upper surfaces, and rectangular radiation cavity 21 is fixed on directly over the cross coupling gap 12 of rectangle feed waveguide 1;
As shown in Figure 7, described double-T shaped Waveguide branching device 3: the E arm 31 of double-T shaped Waveguide branching device 3 and H arm 32 are input, two side arms 33 are output, two side arms 33 of double-T shaped Waveguide branching device 3 are connected with two hollow conduction cavitys 11 of rectangle feed waveguide 1 respectively, and the angle forming between two rectangle feed waveguides 1 is 0 ~ 180 degree.
The center superposition in the center of described rectangular radiation cavity 21 bottom surfaces and cross coupling gap 12.
Four jiaos of described rectangular radiation cavity 21 are screwed in directly over the cross coupling gap 12 of rectangle feed waveguide 1, and screw is flat head screw.
Described two rectangle feed waveguides 1, two antenna radiation units 2 and double-T shaped Waveguide branching device 3 are metal material.
Two antenna radiation units 2 of two kinds of antenna structures of the present invention are all identical with the structure of double-T shaped Waveguide branching device 3, different is the structure of rectangle feed waveguide 1: the former is that two rectangle feed waveguides 1 interconnect after forming an angle and are connected on double-T shaped Waveguide branching device 3, two rectangle feed waveguides 1 share short circuit metal piece 13, and angled placement, input is connected to respectively two side arm outputs of double-T shaped Waveguide branching device 3, and two rectangle feed waveguide 1 angles determine to connect waveguide turning; The latter is that two rectangle feed waveguides 1 are connected on double-T shaped Waveguide branching device 3 discretely, and two side arm 33 outputs connect respectively two rectangle feed waveguides 1, and two angled placements of rectangle feed waveguide 1.
The Si Jiaochu of rectangular radiation cavity 21 upper surfaces has screw hole 23, and screw is connected on the screw hole 23 of rectangular radiation cavity 21 through rectangular radiation cavity 21.
Antenna structure is all-metal construction, without any need for dielectric material; The size of adjusting four set isosceles triangle radius 22 of rectangular radiation cavity 21 upper surfaces realizes broadband line polarization and broadband circle polarized; Adjusting angle between two rectangle feed waveguides 1 realizes " 8 " beam shape and the width of font wave beam; The power of double-T shaped Waveguide branching device 3E arm 31 inputs, from the anti-phase decile output of side arm 33, is realized wave beam and is added, and the power of H arm 32 inputs is from minute outputs such as side arm 33 homophases, and realizing wave beam subtracts each other, thus realization and wave beam and difference beam.
As shown in Figure 3, described rectangle feed waveguide 1 adopts standard waveguide, be that the long limit of waveguide and the Length Ratio of broadside are 2:1, if operation wavelength is, the long limit of rectangle feed waveguide 1 is A, for making rectangle feed waveguide 1 guarantee single mode operation (transmission TE10 mould), require A << 2A.Solid metal block 13 partly regulates rectangle feed waveguide inside to reach resonance condition as impedance adjustment, eliminates echo reflection.Solid metal block 13 is positioned at hollow conduction cavity 11 port offsides, with rectangle feed waveguide 1 one, can be added and partly be emptied realization man-hour by rectangle feed waveguide.
When two electric field components, realize phase phasic difference 0 degree or 180 degree, its composite wave is realized linear polarization; When two electric field components, realize amplitude equal phase and differ 90 degree, and orthogonal space, composite wave is circular polarity format.Utilize this principle, by adjusting the size of four isosceles triangle radius 22 of rectangular radiation cavity 21 upper surfaces, can realize width circular polarization and wide line polarization.
As shown in Figure 6, described four flutings of rectangular radiation cavity 21 upper surface can be divided into two groups, and groove a and c are one group, and groove b and d are one group, difference called after group 1 and group 2, and wherein a is identical with c, and b is identical with d.When group 1 and group 2 notching construction are when identical, the electric field level producing in k1k2 direction is equal, and opposite direction, cancels out each other; The direction of an electric field producing in k3k4 direction is identical, and effect is strengthened, and realizes the linear polarization in k3k4 direction, and now operating frequency is identical with feed millimeter-wave frequency.The size of b, d in the size of a, c and group 2 in adjustment group respectively 1, makes to organize 1 and is respectively with the operating frequency of group 2
f 1with
f 2, to organize like this 1 mutually vertically with group 2 polarization modes in working order, adjustment structure parameter makes whole antenna in operating frequency
f 0(
f 0drop on
f 1with
f 2between) be in field amount phase phasic difference 90 degree within the scope of certain solid angle of far zone field, thus the circular polarization of realization.Adopt two isosceles triangle radius 22 to be combined to form class bow-tie type radius, can realize broadband line polarization and broadband circle polarized.
As shown in Figure 2 and Figure 9, two interconnect or angle that two mutually discrete rectangle feed waveguides 1 form is 0 ~ 180 degree, adjust placed angle, realize beam shape and the width of figure of eight wave beam.
As shown in Figure 7, described double-T shaped Waveguide branching device 3 is combined by two E-THe H-T branches with common symmetrical plane, comprises four rectangular waveguide arms: E arm 31, H arm 32, two side arms 33.When wide of branch-waveguide and TE10 mould electric field place plane parallel, the branch-waveguide structure WeiE-T branch forming, can realize the anti-phase output of constant amplitude; When wide of branch-waveguide and place, TE10 mould magnetic field plane parallel, be called H-T branch, can realize the output of constant amplitude homophase.E arm 31 and two side arms 33 form an E-T structure, will be exported by the anti-phase decile of side arm 33, and do not enter H arm 32 by the power of E arm 31 inputs; H arm 32 and two side arms 33 form a H-T structure, will be by minute outputs such as side arm 33 homophases by the power of H arm 32 inputs, and do not enter E arm 31.Two side arms 33 are output, connect respectively rectangle feed waveguide 1, and the power of E arm 31 inputs, from the anti-phase decile output of side arm, is realized wave beam and is added, and the power of H arm input is from minute outputs such as side arm homophases, and realizing wave beam subtracts each other, thus realization and wave beam and difference beam.
Specific embodiment of the invention is from the E arm of double-T shaped Waveguide branching device 3 or H arm input radio frequency signal, forms the figure of eight wave beam of circular polarization or linear polarization from the isosceles triangle radius 22 of two antenna radiation units 2.
Below provide part specific experiment result of the present invention, so that realizability of the present invention to be described.Test result be take the first antenna structure as example, and the second antenna structure can reach same design effect by identical concrete enforcement.
The parameter that antenna concrete structure design mainly comprises has size, rectangular radiation cavity 21 sizes in cross coupling gap 12, the size of four isosceles triangles 22 and position etc.Given specific experiment design is on 30 GHz, and hollow conduction cavity 11 sizes of rectangle feed waveguide 1 adopt standard rectangular waveguide dimensions, and model is WR28.Two rectangular sizes of rectangle in cross coupling gap 12 are respectively 4.57 mm * 1.52 mm and 4.37 mm * 1.52 mm, and rectangular radiation cavity 21 is of a size of 9.14 mm * 2.50, mm * 9.14 mm
3, the cross coupling central point in gap 12 and the distance of short circuit metal piece 12 are 5.77 mm.The size that changes four isosceles triangles 22 can realize respectively circular polarization and linear polarization.Because linear polarization realizes conveniently, only provide circular polarization experimental result herein.As shown in figure 10, circular polarization return loss meet-below 10dB.As shown in figure 11, Circular polarization ratio band is wider than 300 MHz, all realizes good circular polarization performance.Figure 12 is that rectangle feed waveguide 1 angle is 90 figure of eight wave beam design results while spending, and in 140 degree beamwidths, gain is all greater than zero, flat and realize greatest irradiation direction in ± 40 degree left and right, and beam shape is figure of eight structure half.
Be more than the specific embodiment of the present invention, those skilled in the art can produce millimeter wave all-metal figure of eight beam antenna by applying some alternative of mentioning in method disclosed by the invention and invention.The present invention is because agent structure is all-metal construction, thereby mechanical strength is high, and variations in temperature is constant, can be applicable to work under extreme condition the high low temperature situation of the limit in the application of for example high impact, and space.The millimeter wave circular polarization of this compact conformation, small size, light weight and the design of linear polarization figure of eight wave beam, in Aero-Space, have broad application prospects in airborne radar.
Above-mentioned embodiment is used for the present invention that explains, rather than limits the invention, and in the protection range of spirit of the present invention and claim, any modification and change that the present invention is made, all fall into protection scope of the present invention.
Claims (10)
1. the all-metal circular polarization of millimeter wave and a linear polarization figure of eight beam antenna, is characterized in that: comprise two rectangle feed waveguides (1), two antenna radiation units (2) and double-T shaped Waveguide branching device (3); Two antenna radiation units (2) are arranged on respectively on two interconnective rectangle feed waveguides (1), the input of two rectangle feed waveguides (1) is connected with two outputs of double-T shaped Waveguide branching device (3) respectively, and the angle that two rectangle feed waveguides (1) are interconnected to form is 0 ~ 180 degree.
2. the all-metal circular polarization of a kind of millimeter wave according to claim 1 and linear polarization figure of eight beam antenna, it is characterized in that: described two rectangle feed waveguides (1): one end is hollow conduction cavity (11), two rectangle feed waveguides (1) other end is same short circuit metal piece (13), it is 0 ~ 180 degree that two hollow conduction cavitys (11) are connected to the upper angle forming of short circuit metal piece (13), on the wide wall of hollow conduction cavity (11), have cross coupling gap (12), the central point in cross coupling gap (12) is positioned on hollow conduction cavity (11) broadside perpendicular bisector, the cross direction in cross coupling gap (12) all with hollow conduction cavity (11) broadside perpendicular bisector in angle of 45 degrees,
Described antenna radiation unit (2): rectangular radiation cavity (21) upper surface of antenna radiation unit (2) is respectively provided with along two diagonals the isosceles triangle radius (22) that a pair of Central Symmetry is arranged, the summit positioned opposite of two isosceles triangle radius (22) of a pair of isosceles triangle radius (22), the perpendicular bisector on isosceles triangle radius (22) base is all located on the diagonal of rectangular radiation chamber (21) upper surface, rectangular radiation cavity (21) is fixed on directly over the cross coupling gap (12) of rectangle feed waveguide (1),
Described double-T shaped Waveguide branching device (3): E arm (31) and the H arm (32) of double-T shaped Waveguide branching device (3) are input, two side arms (33) are output, and two side arms (33) of double-T shaped Waveguide branching device (3) are connected by extending waveguide with two hollow conduction cavitys (11) of rectangle feed waveguide (1) respectively.
3. the all-metal circular polarization of a kind of millimeter wave according to claim 2 and linear polarization figure of eight beam antenna, is characterized in that: the center superposition in the center of described rectangular radiation cavity (21) bottom surface and cross coupling gap (12).
4. the all-metal circular polarization of a kind of millimeter wave according to claim 2 and linear polarization figure of eight beam antenna, it is characterized in that: four jiaos of described rectangular radiation cavity (21) are screwed in directly over the cross coupling gap (12) of rectangle feed waveguide (1), and screw is flat head screw.
5. the all-metal circular polarization of a kind of millimeter wave according to claim 1 and linear polarization figure of eight beam antenna, is characterized in that: described two rectangle feed waveguides (1), two antenna radiation units (2) and double-T shaped Waveguide branching device (3) are metal material.
6. the all-metal circular polarization of millimeter wave and a linear polarization figure of eight beam antenna, is characterized in that: comprise two rectangle feed waveguides (1), two antenna radiation units (2) and double-T shaped Waveguide branching device (3); Two antenna radiation units (2) are arranged on respectively on two rectangle feed waveguides (1), the input of two rectangle feed waveguides (1) is connected with the two ends of double-T shaped Waveguide branching device (3) output respectively, and the angle forming between two rectangle feed waveguides (1) is 0 ~ 180 degree.
7. the all-metal circular polarization of a kind of millimeter wave according to claim 6 and linear polarization figure of eight beam antenna, it is characterized in that: described two rectangle feed waveguides (1): one end is hollow conduction cavity (11), the other end is short circuit metal piece (13), on the wide wall of hollow conduction cavity (11), have cross coupling gap (12), the central point in cross coupling gap (12) is positioned on hollow conduction cavity (11) broadside perpendicular bisector, the cross direction in cross coupling gap (12) all with hollow conduction cavity (11) broadside perpendicular bisector in angle of 45 degrees,
Described antenna radiation unit (2): rectangular radiation cavity (21) upper surface of antenna radiation unit (2) is respectively provided with along two diagonals the isosceles triangle radius (22) that a pair of Central Symmetry is arranged, the summit positioned opposite of two isosceles triangle radius (22) of a pair of isosceles triangle radius (22), the perpendicular bisector on isosceles triangle radius (22) base is all located on the diagonal of rectangular radiation chamber (21) upper surface, rectangular radiation cavity (21) is fixed on directly over the cross coupling gap (12) of rectangle feed waveguide (1),
Described double-T shaped Waveguide branching device (3): E arm (31) and the H arm (32) of double-T shaped Waveguide branching device (3) are input, two side arms (33) are output, two side arms (33) of double-T shaped Waveguide branching device (3) are connected with two hollow conduction cavitys (11) of rectangle feed waveguide (1) respectively, and the angle forming between two rectangle feed waveguides (1) is 0 ~ 180 degree.
8. the all-metal circular polarization of a kind of millimeter wave according to claim 7 and linear polarization figure of eight beam antenna, is characterized in that: the center superposition in the center of described rectangular radiation cavity (21) bottom surface and cross coupling gap (12).
9. the all-metal circular polarization of a kind of millimeter wave according to claim 7 and linear polarization figure of eight beam antenna, it is characterized in that: four jiaos of described rectangular radiation cavity (21) are screwed in directly over the cross coupling gap (12) of rectangle feed waveguide (1), and screw is flat head screw.
10. the all-metal circular polarization of a kind of millimeter wave according to claim 6 and linear polarization figure of eight beam antenna, is characterized in that: described two rectangle feed waveguides (1), two antenna radiation units (2) and double-T shaped Waveguide branching device (3) are metal material.
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Cited By (2)
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| CN113193345A (en) * | 2021-04-30 | 2021-07-30 | 中国电子科技集团公司第三十八研究所 | S-shaped caliber circularly polarized antenna unit and array surface antenna |
| CN117353000A (en) * | 2023-09-26 | 2024-01-05 | 华南理工大学 | Novel 3D millimeter wave vehicle-mounted radar circularly polarized antenna |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113193345A (en) * | 2021-04-30 | 2021-07-30 | 中国电子科技集团公司第三十八研究所 | S-shaped caliber circularly polarized antenna unit and array surface antenna |
| CN117353000A (en) * | 2023-09-26 | 2024-01-05 | 华南理工大学 | Novel 3D millimeter wave vehicle-mounted radar circularly polarized antenna |
| CN117353000B (en) * | 2023-09-26 | 2024-04-26 | 华南理工大学 | Novel 3D millimeter wave vehicle-mounted radar circularly polarized antenna |
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