CN107706508A

CN107706508A - A kind of anti-multipath antenna for satellite navigation precision approach system

Info

Publication number: CN107706508A
Application number: CN201710716727.3A
Authority: CN
Inventors: 董建明
Original assignee: CETC 54 Research Institute
Current assignee: CETC 54 Research Institute
Priority date: 2017-08-21
Filing date: 2017-08-21
Publication date: 2018-02-16

Abstract

The invention discloses a kind of anti-multipath antenna for satellite navigation precision approach system, belong to satellite navigation precision approach technical field.It includes center pillar and feeding network, the multiple and perpendicular aspect of center pillar is equally spacedly provided with center pillar, have in each aspect around center pillar multiple radial branchings that angle is set at equal intervals, the end both sides of radial branching are respectively provided with a dipole arm, the bearing of trend of the bearing of trend of dipole arm and radial branching where the dipole arm is perpendicular, there is angle between dipole arm and aspect, two dipole arms on same radial branching are in opposite direction and equal in magnitude relative to the angle of aspect, two dipole arms on same radial branching form a dipole, any two deck structures congruence and relative irrotationality, feeding network is fed to each aspect.Inventive antenna has the characteristics of simple in construction, radiation effect is excellent, is a kind of important improvement to prior art.

Description

A kind of anti-multipath antenna for satellite navigation precision approach system

Technical field

The present invention relates to satellite navigation precision approach technical field, particularly relates to one kind and is used for satellite navigation precision approach system The anti-multipath antenna of system.

Background technology

At present, satellite navigation engineering field is more using the measurement type antenna with choke structure, but this antenna is not It can meet that satellite is directed into the engineering demand of nearly this most significant end.Satellite navigation precision approach landing system is (traditionally using English Literary abbreviation GBAS) need using unique ground reference antenna, still, antenna generally existing multipaths restraint energy of the prior art The problems such as power is poor, phase center is unstable.

The content of the invention

In view of this, the present invention propose a kind of anti-multipath antenna for satellite navigation precision approach system, its with compared with Good multipaths restraint ability, and the phase center with high stable.

Based on above-mentioned purpose, technical scheme provided by the invention is：

A kind of anti-multipath antenna for satellite navigation precision approach system, it includes center pillar and feeding network, on center pillar Equally spacedly be provided with it is multiple with the perpendicular aspect of center pillar, have in each aspect around center pillar at equal intervals angle set it is multiple Radial branching, radial branching are respectively provided with a dipole arm, the bearing of trend of dipole arm and the dipole arm in end both sides The bearing of trend of place radial branching is perpendicular, has angle between dipole arm and aspect, two on same radial branching Dipole arm is in opposite direction and equal in magnitude relative to the angle of aspect, and two dipole arms on same radial branching form one Individual dipole, any two deck structures congruence and relative irrotationality, feeding network are fed to each aspect.

Optionally, aspect shares 21, has four radial branchings, the folder of each dipole arm and aspect in each aspect Angle size is 45 degree.

Optionally, feeding network in each aspect by around circumference traversal in a manner of to all dipoles in the aspect Son carries out the rotating feed of equiphase difference.

Optionally, feeding network is fed to each aspect Down-Up using width phase energisation mode as shown in the table：

。

From narration above as can be seen that the beneficial effect of technical solution of the present invention is：

The present inventor thinks that preferable GBAS antennas should have uniform gain, dextrorotation to justify in upper half-space Polarization characteristic；Meanwhile in order to ensure multipaths restraint ability, less than the 5 degree elevations angle (the satellite angle of cut-off of GBAS systems takes 5 degree) it Afterwards, radiation characteristic needs sharp by characteristic (sharp cutoff), and Sidelobe Suppression should be not less than 30dB, and antenna will have The phase center of high stable.In order to meet above-mentioned requirements, while in order to adapt to severe electromagnetic environment, inventor devises above-mentioned Antenna, the antenna can utilize the radiation such as itself broad beam, good circular polarization characteristics, low elevation angle sharp cutoff and ultralow side lobe Characteristic, the reception of satellite navigation signals and the effect of anti-multipath can be realized.Further, since employed in antenna form design Geometrical symmetry designs and the excitation of the feed of regularity, so the antenna has high stable phase center characteristic, available for having The satellite for having high-precision requirement is directed into nearly system, being capable of the navigation system such as compatible with GPS, Galieo and Beidou II simultaneously.

In a word, inventive antenna has the characteristics of simple in construction, radiation effect is excellent, is to a kind of important of prior art Improve.

Brief description of the drawings

In order to clearly describe this patent, one or more accompanying drawing is provided below, these accompanying drawings are intended to this patent Background technology, technical principle and/or some specific embodiments make aid illustration.It should be noted that these accompanying drawings can It can not also provide some to provide and have been described and belong to known in those of ordinary skill in the art often at this patent word segment The detail of knowledge；Also, because one of ordinary skill in the art can combine the published word content of this patent completely And/or accompanying drawing content, more accompanying drawings, therefore these accompanying drawings below are designed in the case where not paying any creative work Can cover can not also cover all technical schemes that this patent word segment is described.In addition, these accompanying drawings is specific interior Containing needs the word content with reference to this patent to be determined, when word content and some obvious knot in these accompanying drawings of this patent , it is necessary to which to carry out comprehensive descision be this on earth with reference to the narration of the common knowledge and this patent other parts of this area when structure is not consistent The word segment of patent, which exists to exist in clerical mistake, or accompanying drawing, draws mistake.Especially, the following drawings is the figure of exemplary in nature Piece, it is not intended that imply the protection domain of this patent, one of ordinary skill in the art is by reference to the text disclosed in this patent Word content and/or accompanying drawing content, more accompanying drawings can be designed in the case where not paying any creative work, these are new Technical scheme representated by accompanying drawing is still within the protection domain of this patent.

Fig. 1 is a kind of structural representation of antenna in the embodiment of the present invention；

Fig. 2 is the structural representation of an aspect in Fig. 1；

Fig. 3 is the directional diagram of antenna in the embodiment of the present invention.

Embodiment

For the ease of understanding of the those skilled in the art to the art of this patent scheme, meanwhile, in order that the technology of this patent Purpose, technical scheme and beneficial effect are clearer, and the protection domain of claims is fully supported, below with tool The form of body case makes further, more detailed description to the technical scheme of this patent.

As illustrated in fig. 1 and 2, a kind of anti-multipath antenna for satellite navigation precision approach system, it includes center pillar 1 and feedback Electric network, is equally spacedly provided with center pillar 1 multiple with the perpendicular aspect 2 of center pillar 1, has in each aspect 2 around center pillar 1 etc. Multiple radial branchings 21 that interval angles are set, each radial branching 21 are respectively provided with a dipole arm 22 in the both sides of end, The bearing of trend of the bearing of trend of dipole arm 22 and the place radial branching 21 of dipole arm 22 is perpendicular, dipole arm 22 with There is angle between aspect 2, two dipole arms 22 on same radial branching 21 it is in opposite direction relative to the angle of aspect 2 and Equal in magnitude, two dipole arms 22 on same radial branching 21 form a dipole, any two deck structures congruence and With respect to irrotationality (that is, an aspect can coincide only by translation with another aspect), feeding network is to each aspect 2 Fed.

Optionally, Fig. 1 and 2 is still seen, aspect shares 21, has four congruent radial branchings in each aspect, each The corner dimension of dipole arm and aspect is 45 degree.

It should be noted that Fig. 1 is only the structure chart of illustrative nature, the virtualization or masking processing of shield portions are not done, The figure is mainly made up of aspect and center pillar this two large divisions, and aspect shares 21, and is intervally arranged center pillar is first-class, each two layer The structure all same in face, is not rotated against between layers；Fig. 2 show the structural representation of an aspect of antenna in Fig. 1 Figure, wherein, center pillar 1 passes through from the center 20 of aspect.

Optionally, feeding network in each aspect by around circumference traversal in a manner of to all dipoles in the aspect Son carries out the rotating feed of equiphase difference.For example, for the antenna shown in Fig. 1 and 2, feeding network is according to 0/90/180/270 degree Phase rotating feed is carried out to every layer of 4 dipoles.

Optionally, feeding network is presented using width phase energisation mode as shown in the table each aspect Down-Up Electricity：

。

In order to realize the feeding classification in above-mentioned this layer with interlayer, can differ to form net including individual layer in feeding network Network and one point of 11 width mutually power splitter such as not.

Fig. 3 is the excellent directional diagram of antenna in the embodiment of the present invention, and inventive antenna has excellent as seen from the figure Radiation effect, it is a kind of important improvement to prior art.

It is to be appreciated that to be intended merely to facilitate this area common for the above-mentioned narration for this patent embodiment The exemplary description that technical staff understands this patent scheme and enumerated, does not imply that the protection domain of this patent is limited solely to In this few example, those of ordinary skill in the art completely can on the premise of making and fully understanding to the art of this patent scheme, In the form of not paying any creative work, by taking each example cited by this patent combination technique feature, replacing Some technical characteristics, more technical characteristics etc. mode is added, obtain more embodiments, all these specific implementations Mode is within the covering scope of patent claims book, and therefore, these new embodiments also should be in this patent Protection domain within.

In addition, for the purpose for simplifying narration, this patent may also not enumerate some ordinary specific embodiments, this A little schemes are that those of ordinary skill in the art can expect naturally after it understanding of the art of this patent scheme, it is clear that this A little schemes should be also included within the protection domain of this patent.

For the purpose for simplifying narration, above-mentioned each embodiment may only up to for the extent of disclosure of ins and outs The degree that can voluntarily make a decision to those skilled in the art, i.e. there is no disclosed ins and outs for above-mentioned embodiment, Those of ordinary skill in the art completely can be in the case where not paying any creative work, in filling for the art of this patent scheme Divide under prompting, completed by means of the disclosed document of textbook, reference book, paper, patent, audio-visual product etc., or, this A little details are the contents that can voluntarily be maked decision according to actual conditions under being generally understood that of those of ordinary skill in the art. It can be seen that even if these underground ins and outs, the open adequacy of the art of this patent scheme will not also be impacted.

In a word, it is any on the basis of explanation effect of the patent specification to claims protection domain is combined Fall into the specific embodiment of patent claims book covering scope, within the protection domain of this patent..

Claims

A kind of 1. anti-multipath antenna for satellite navigation precision approach system, it is characterised in that including center pillar and feeding network, The multiple and perpendicular aspect of center pillar is equally spacedly provided with the center pillar, is had in each aspect around the center pillar at equal intervals Multiple radial branchings that angle is set, the radial branching are respectively provided with a dipole arm, the dipole arm in end both sides Bearing of trend and the dipole arm where radial branching bearing of trend it is perpendicular, between the dipole arm and the aspect With angle, two dipole arms on same radial branching are in opposite direction and equal in magnitude relative to the angle of aspect, same Two dipole arms on radial branching form a dipole, any two deck structures congruence and relative irrotationality, the feed Network is fed to each aspect.
2. the anti-multipath antenna according to claim 1 for satellite navigation precision approach system, it is characterised in that described Aspect shares 21, has four radial branchings in each aspect, the corner dimension of each dipole arm and aspect is 45 degree.
3. the anti-multipath antenna according to claim 1 for satellite navigation precision approach system, it is characterised in that described Feeding network is poor to all dipoles progress equiphase in the aspect in a manner of the traversal around circumference in each aspect Rotating feed.
4. the anti-multipath antenna according to claim 2 for satellite navigation precision approach system, it is characterised in that described Feeding network is fed to each aspect Down-Up using width phase energisation mode as shown in the table：

。