CN110323568A

CN110323568A - Pyramidal horn antenna

Info

Publication number: CN110323568A
Application number: CN201910576277.1A
Authority: CN
Inventors: 李文彦; 黄晓东; 金秀华
Original assignee: Nanjing Post and Telecommunication University
Current assignee: Nanjing Post and Telecommunication University
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2019-10-11

Abstract

The invention discloses a pyramidal horn antenna, which comprises a horn main body, a planar waveguide, parallel twin wires and a feeding port; the horn main body comprises two first metal plates oppositely placed to form a horn opening; one side of the planar waveguide The opposite sides of the horn openings of the two first metal plates are respectively connected, and the other side is connected with one side of the two oppositely placed second metal plates forming the parallel double lines, and the other side of the two second metal plates One side is commonly connected to the feed port; the length of the side connected to the flat waveguide of the parallel double wire is greater than the length of the side connected to the feed port; the position of the metal plate is fixed by a fixing device between every two oppositely placed metal plates ; The number of parallel double lines is 2 to the nth power, and n is a natural number. The invention can achieve more uniform field distribution, thereby realizing higher gain, and the proposed structure has wide bandwidth and simple structure.

Description

Pyramidal horn antenna

Technical field

The present invention relates to a kind of electromagnetic horns, and in particular to a kind of pyramidal horn antenna.

Background technique

The citation form of electromagnetic horn is that the opening face of rectangular waveguide or circular waveguide is gradually extended, and which improve waves The matching with free space is led, so that the reflection coefficient in waveguide is small.Electromagnetic horn has structure simply and directional diagram is easy to control The advantages of processed, the standard antenna being often used as in antenna measurement；The element antenna of phased array；The feed of large-scale radio telescope Deng.

Existing electromagnetic horn, there is that field distribution is uneven, the lower defect of gain.

Summary of the invention

Goal of the invention: the object of the present invention is to provide a kind of high-gain, field distribution is uniform, structure is simple, system easy to process The duplex feeding point wide band high-gain electromagnetic horn of work.

Technical solution: pyramidal horn antenna of the invention, including horn main body, planar waveguide, parallel wire and feed end Mouthful；The horn main body includes two pieces of first metal plates staggered relatively in loudspeaker opening；The planar waveguide includes two pieces of phases To the second metal plate of placement, the relative edge with two pieces of the first metal plate loudspeaker openings is separately connected on one side, another side with Constitute the connection on one side of two pieces of third metal plates staggered relatively of the parallel wire (3), the feed port (4) with two pieces The another side of the third metal plate connects；The edge lengths that the parallel wire is connect with planar waveguide are greater than and feed port One edge lengths of connection；The position of metal plate is fixed by fixed device between every two pieces of metal plates staggered relatively； The n times side that the quantity of the parallel wire is 2, n is natural number.

It can be duplex feeding point wide band high-gain of the invention successively by parallel wire and planar waveguide when feed TEM electromagnetic horn provides approximation TEM mould, so as to improve the field distribution at bell mouth diameter, obtains more high-gain.

Preferably, mutually placed side by side between the parallel wire, it contacts with each other on the connection side with planar waveguide.

Preferably, the disconnected side of the parallel wire is through exponential function or vivaldi function optimization forming curves structure.

Preferably, the quantity of the parallel wire is 2.

Preferably, first metal plate is planar structure or the curved surface through exponential function or vivaldi function optimization Structure.

Preferably, to the back of two pieces of first metal plates, outer expand forms expanded structure respectively.

The utility model has the advantages that compared with prior art, the present invention can achieve the following beneficial effects: 1, passing through broadening tradition TEM The feed end of loudspeaker, and fed using double trapezoidal parallel wires of branch, the field distribution at bell mouth diameter has both been improved, bore is made It is more uniform to locate field distribution, and more high-gain can be obtained than single branch.2, horn main body is carried out using vivaldi function etc. excellent Change, matching performance of the antenna on broadband can be improved, to broaden bandwidth.3, the configuration of the present invention is simple, production easy to process.

Detailed description of the invention

Fig. 1 is schematic perspective view of the invention；

Fig. 2 is overlooking structure diagram of the invention；

Fig. 3 is right side structural representation of the invention；

Fig. 4 is that parallel wire of the invention deforms schematic diagram；

Fig. 5 is several distressed structure schematic diagrames of horn main body of the present invention, wherein (a) is curved-surface structure, it is (b) (a) Expanded structure, the trigone cone after (c) expanding for planar structure, the trapezoidal block structure after (d) expanding for planar structure；

Fig. 6 is schematic perspective view of the present invention using the horn main body of Fig. 5 (a)；

Fig. 7 is the gain of the invention in 1-18GHz calculated using HFSS software；

Fig. 8 is the S11 of the invention in 1-18GHz calculated using HFSS software.

Specific embodiment

Present invention is further described in detail with specific embodiment with reference to the accompanying drawings of the specification.

As shown in Figure 1-3, the invention discloses a kind of pyramidal horn antenna, including it is horn main body 1, planar waveguide 2, parallel Two-wire 3, feed port 4.

The horn main body 1 includes that two pieces of relative tilts place the first metal plate of rectangle being open in loudspeaker, which makes At antenna aperture field distribution more evenly, to improve antenna gain；The planar waveguide 2 includes two blocks of parallel second gold medals of rectangle Belong to plate；The long side of the planar waveguide 2 is connect with the short side of the first metal plate of rectangle of horn main body 1 respectively, two pieces of rectangles The long side of one metal plate forms loudspeaker open free end.

Parallel wire 3 described in the present embodiment is two, and respectively parallel wire 3-1,3-2, every parallel wire is by two pieces The opposite trapezoidal third metal plate being placed in parallel is constituted, the long bottom edge of the trapezoidal third metal plate for constituting two parallel wires Parallel contact side by side, is connect with another long side of the planar waveguide 2 respectively, i.e., the long bottom edge of every parallel wire 3 is structure At the half of rectangle the first metal plate bond length of horn main body 1；The top margin of every two pieces of trapezoidal third metal plates connects one Feed port 4.The third metal plate of parallel wire 3 is constituted other than trapezoidal, can also be that two trapezoidal sides are passed through and refer to Number function or vivaldi function optimization forming curves structure, can be improved matching performance of the antenna on broadband, to broaden band It is wide.Gradually transition narrows since long bottom edge for two trapezoidal sides, until the feed port 4 being connected with trapezoidal another top margin Equal length, as shown in Figure 4.Since parallel wire 3 is symmetrical structure, the matching performance of antenna can be improved, and because of it It supports TEM mould, therefore field distribution at antenna aperture can be made uniform, improve antenna gain.

The first metal plate of rectangle of the composition horn main body 1 of the present embodiment is can also be other than surface plate through index letter Several or vivaldi function optimization curved slab further can also be the back to two pieces of first metal plates of rectangle It is outer respectively to expand the expanded structure plate formed.Fig. 5 (a) is the curved slab through exponential function or vivaldi function optimization；(b) it is The structure being extended on the basis of (a)；(c) and (d) is trigone cone after being extended to rectangular plate, trapezoidal agllutination Structure.Fig. 6 is the schematic perspective view of (a) in Fig. 5.

The present embodiment is by installing support frame to the position of every two pieces of metal plates staggered relatively in the side of every piece of metal plate It sets and is fixed and (is not drawn into figure).

As shown in fig. 7, the pyramidal horn antenna of the present embodiment, the increasing of the antenna that is calculated using HFSS software in 1-18GHz Benefit is incremented to 22.2dB from 5.7dB.

As shown in figure 8, the super-wide band high-gain TEM mode electromagnetic horn of the present embodiment, the day calculated using HFSS software S11 of the line in 1-18GHz, wherein in 3GHz-18GHz frequency band, S11 is below -10dB.

By above-mentioned test it is found that super-wide band high-gain mode electromagnetic horn of the invention, has broadband, high-gain Feature, superior performance.

Claims

1. a pyramidal horn antenna, is characterized in that, comprises horn main body (1), planar waveguide (2), parallel pair of wires (3) and feed port (4);

The speaker main body (1) includes two first metal plates facing each other to form a speaker opening; the planar waveguide (2) includes two second metal plates facing each other, one side of which is connected to the two first metal plates The opposite sides of the opening are respectively connected, and the other side is connected to one side of the two oppositely placed third metal plates forming the parallel double wire (3), and the feed port (4) is connected to the two third metal plates The length of the side connected to the flat waveguide (2) of the parallel double wire (3) is greater than the length of the side connected to the feed port (4); every two oppositely placed metal plates are connected by a fixing device The position of the metal plate is fixed; the number of the parallel double lines (3) is 2 to the nth power, and n is a natural number.

2 . The pyramidal horn antenna according to claim 1 , characterized in that, the parallel pairs ( 3 ) are placed side by side with each other, and are in contact with each other on the connecting edge with the planar waveguide ( 2 ). 3 .

3. The pyramid horn antenna according to claim 1, characterized in that, the non-connected sides of the parallel double wires (3) are optimized to form a curved structure by an exponential function or a vivaldi function.

4. The pyramidal horn antenna according to claim 1, characterized in that, the number of the parallel twin wires (3) is two.

5 . The pyramid horn antenna according to claim 1 , wherein the first metal plate is a planar structure or a curved surface structure optimized by an exponential function or a vivaldi function.

6 . The pyramidal horn antenna according to claim 1 , wherein the opposite surfaces of the two first metal plates are respectively expanded to form an expansion structure. 7 .

7. The pyramid horn antenna according to claim 6, wherein the first metal plate is a triangular pyramid or a trapezoidal block.

8. The pyramidal horn antenna according to claim 7, wherein the opposite sides of the two triangular pyramids are respectively optimized to form a curved structure by an exponential function or a vivaldi function.