CN201562755U

CN201562755U - Wideband ridge horn antenna

Info

Publication number: CN201562755U
Application number: CN2009202360241U
Authority: CN
Inventors: 黄海波; 滕晓华
Original assignee: CETC 14 Research Institute
Current assignee: CETC 14 Research Institute
Priority date: 2009-09-25
Filing date: 2009-09-25
Publication date: 2010-08-25
Anticipated expiration: 2019-09-25

Abstract

The utility model relates to a wideband ridge horn antenna, including a medium printing plate (1), a coaxial joint (2), ridges (3), a conductor (4), a base (5) and an aluminium plate (6); a feed conductor (4) passes through two ridges (3) and forms a coaxial line of 50 ohm; the joint is an N type coaxial joint (2) of 50 ohm; an inner conductor conical transition section is arranged between the coaxial joint (4) and the conductor (4); the conductor (4) is arranged on a position abutted against the end of the ridge (3); the coaxial joint (2), ridges (3) and the conductor (4) are installed in the base (5); the medium printing plate (1) and the aluminium plate (6) form a horn section; narrow wall surfaces on two sides of the horn section are designed to the medium printing plate (1); and the horn section is connected with the base. The length of the horn section is greater than a half of the lowest work frequency wavelength. Six narrow metal sheets are uniformly disposed on the medium printing plate (10. In the utility model, the work bandwidth of the horn antenna is increased.

Description

The broadband ridged horn antenna

Technical field

The utility model relates to a kind of broadband ridged horn antenna, belongs to microwave technical field.

Background technology

Along with the development of national defense industry and radiotechnics, the broadband technology has caused attention gradually in the application of aspects such as electromagnetic interference, electromagnetic compatibility and environmental monitoring.At present, the frequency band that electronic warfare equipment covers is broad also, and along with the development of technology, broadband technology has become development trend, so the application of broad-band antenna also more and more widely.

Band chamber flat helical antenna commonly used at present has broadband, but gain is lower, can not satisfy the requirement of system in a lot of occasions; Though logarithm periodic antenna also can reach broadband in theory, at high band, particularly when frequency during greater than 10GHz, problems such as its feed and processing all are difficult to resolve determines; And common horn antenna has higher bore efficient and gain, and directivity is fine, possesses very strong peak power holding capacity.But its frequency band is narrower, its relative bandwidth of common horn antenna generally≤50%, the frequency range of 1GHz～18GHz needs a plurality of horn antennas could make up covering, and in some specific occasions, the weight of common loudspeaker, volume and disassembly process all can be restricted.

The utility model content

1, technical problem to be solved:

Provide a kind of bandwidth of operation of expanding horn antenna at above not enough the utility model, and made loudspeaker beamwidth and beam position in broadband, change less a kind of broadband ridged horn antenna.

2, technical scheme:

The utility model comprises dielectric printing plate, coaxial fitting, ridge, conductor, base, aluminium sheet; The conductor of feed passes and forms the coaxial line of 50 Ω at two chi chungs, joint adopts N type 50 Ω coaxial fittings, adopted the tapered changeover portion of inner wire between coaxial fitting and the conductor, conductor design is in the place near the ridge end, and coaxial fitting, ridge, conductor are installed in the base; Dielectric printing plate and aluminium sheet constitute the loudspeaker section,, the narrow wall in loudspeaker section both sides is designed to the dielectric printing plate, and the loudspeaker section links to each other with base.Described loudspeaker segment length is greater than half of lowest operating frequency wavelength.Evenly divide cloth very narrow sheet metal on the described dielectric printing plate.

3, beneficial effect:

Structural design of the present utility model has increased the bandwidth of operation of horn antenna; Have higher bore efficient and gain; Having beam position and beamwidth changes less; In light weight, volume is little, processing is simple.

Description of drawings

Fig. 1-1 is a front view of the present utility model;

Fig. 1-2 is an end view of the present utility model;

Fig. 1-3 is a vertical view of the present utility model;

Fig. 2 is the structural representation of the utility model dielectric printing plate;

Fig. 3-1 is the front view of the utility model coaxial fitting;

Fig. 3-2 is the end view of the utility model coaxial fitting;

Fig. 4 is the structural representation of the utility model ridge;

Fig. 5 is the structural representation of the utility model conductor;

Fig. 6 is the structural representation of the utility model base;

Fig. 7 is the structural representation of the utility model aluminium sheet.

Embodiment

Below in conjunction with the drawings and the specific embodiments the utility model is described further.

As Fig. 1-1 to shown in Figure 7, the utility model dielectric printing plate 1, coaxial fitting 2, ridge 3, conductor 4, base 5, aluminium sheet 6;

The conductor 4 of feed passes and forms the coaxial line of 50 Ω in two ridges 3, joint adopts N type 50 Ω coaxial fittings 2, adopted the tapered changeover portion of inner wire between coaxial fitting 2 and the conductor 4, but what need consider is the distance of conductor 4 apart from ridge 3 ends, conductor 4 is near more apart from ridge 3 ends, the standing-wave ratio performance of antenna is good more, therefore conductor 4 is designed in the place near ridge 3 ends, electrically contacts with it so that can be deep into corresponding ridge and guarantee.Coaxial fitting 2, ridge 3, conductor 4 are installed in the base 5.

Base 5 can be divided into straight wave guide section part and shorted segment part.The design of straight wave guide section part mainly is to consider to add ridge to reduce the cut-off frequency of main mould transmission, and the selection of straight wave guide bore is chosen with high-end frequency, the service area of loudspeaker low-frequency ranges that added behind the ridge broadening.Feed end then forms a back cavity to the waveguide segment between short circuit face, and shape is a cuboid, and it plays a big part to the bandwidth of broadening conversion.The length of back cavity is similar to 1/4th of intermediate frequency wavelength, and the design of back cavity plays bigger influence to the coupling of loudspeaker input port impedance.

Dielectric printing plate 1 and aluminium sheet 6 constitute the loudspeaker section; The length of loudspeaker section should could guarantee not evoke in the impedance transformation process higher mode like this greater than half of lowest operating frequency wavelength.For making the high band beam-broadening, gain reduces, and the narrow wall in loudspeaker section both sides is designed to dielectric printing plate 1, and 6 the very narrow sheet metals that evenly distribute thereon.Obviously, when frequency of utilization was very low, dielectric printing plate 1 was equivalent to a bulk metal plate. and when frequency of utilization was very high, dielectric printing plate 1 was equivalent to not exist, the beamwidth during so as to the broadening high frequency, the loudspeaker section links to each other with base.

Though the utility model with preferred embodiment openly as above; but they are not to be used for limiting the utility model; anyly have the knack of this skill person; in the spirit and scope that do not break away from the utility model; can do various variations or retouching from working as, what therefore protection range of the present utility model should be defined with the application's claim protection range is as the criterion.

Claims

1. a broadband ridged horn antenna is characterized in that: comprise dielectric printing plate (1), coaxial fitting (2), ridge (3), conductor (4), base (5), aluminium sheet (6); The conductor of feed (4) passes and forms the coaxial line of 50 Ω in two ridges (3), joint adopts N type 50 Ω coaxial fittings (2), adopted the tapered changeover portion of inner wire between coaxial fitting (2) and the conductor (4), conductor (4) design is in the place near ridge (3) end, and coaxial fitting (2), ridge (3), conductor (4) are installed in the base (5); Dielectric printing plate (1) and aluminium sheet (6) constitute the loudspeaker section, and the narrow wall in loudspeaker section both sides is designed to dielectric printing plate (1), and the loudspeaker section links to each other with base.

2. broadband according to claim 1 ridged horn antenna is characterized in that: described loudspeaker segment length is greater than half of lowest operating frequency wavelength.

3. broadband according to claim 1 ridged horn antenna is characterized in that: described dielectric printing plate (1) is gone up 6 the very narrow sheet metals that evenly distribute.