CN201289894Y

CN201289894Y - Miniaturisation endfired coaxial flat waveguide transformer

Info

Publication number: CN201289894Y
Application number: CNU2008200394446U
Authority: CN
Inventors: 刘少辉; 周雁翎; 金谋平
Original assignee: CETC 38 Research Institute
Current assignee: CETC 38 Research Institute
Priority date: 2008-08-21
Filing date: 2008-08-21
Publication date: 2009-08-12
Anticipated expiration: 2018-08-21

Abstract

The utility model relates to a miniaturized end-fired coaxial flat waveguide converter for connecting a coaxial transmission line and a flat waveguide structure (the operating frequency allows higher mode transmission) in a microwave system. The end-fired coaxial flat waveguide converter introduced in the utility model is different from the general type of end-fire coaxial flat waveguide converter in the aspects of no trapezoid transition section and directly realizing conversion of the basic mode between the coaxial line and the flat waveguide in the flat waveguide. The miniaturized end-fired coaxial flat waveguide converter has small length which is about 40% of that of the general type (with same operating frequency and connection aperture), so as to be is favor of meeting the requirements of miniaturization of the system.

Description

The coaxial flat waveguide transformer of miniaturization end-fire

Technical field

The utility model belongs to microwave technical field, is specifically related to the coaxial flat waveguide transformer of a kind of miniaturization end-fire.

Background technology

End-fire coaxial waveguide transducer purposes is very extensive, because of it only takies the two-dimensional space degree of freedom, helps to solve the problem of limited space under a lot of situations.The coaxial flat waveguide transformer of end-fire, relative end-fire coaxial (standard) waveguide transformer, in some cases, we need use this non-standard device.The coaxial flat waveguide transformer of general type end-fire, Fig. 5 show, are made up of three span lines: (1) coaxial (standard) waveguide transformer section; (2) trapezoidal transition section; (3) flat waveguide segment.Wherein, coaxial (standard) waveguide transformer section realizes the basic mode coupling between coaxial line and the standard waveguide, and the trapezoidal transition section realizes the basic mode smooth transition between standard waveguide and the flat waveguide, has avoided the generation of higher modes in flat waveguide.

Summary of the invention

The purpose of this utility model is to develop the coaxial flat waveguide transformer of a kind of novel end-fire, different with the coaxial flat waveguide transformer of general type end-fire, do not contain the trapezoidal transition section, directly in flat waveguide, realize the conversion of basic mode between coaxial line and the flat waveguide, on the basis that only takies the bidimensional degree of freedom, greatly reduce the length of device, help system's miniaturization requirement more.

Technical solution of the present utility model is as follows:

Fig. 1 shows, the coaxial flat waveguide transformer of miniaturization end-fire does not contain the trapezoidal transition section that the coaxial flat waveguide transformer of general type end-fire is had, and only comprises: the flat waveguide 1 of the rectangle of a terminal shortcircuit, step conversion section 2, the match block 3 of two symmetrical configuration, coaxial fitting 4;

The flat waveguide 1 of the rectangle of one terminal shortcircuit is the blind cavity configuration of cuboid, and match block 3 symmetries of two symmetrical configuration are installed in the position of flat waveguide 1 inner chamber of rectangle near narrow limit, and the structure of match block 3 comprises right-angled trapezium and rectangle two parts; Step conversion section 2 is between two match block 3 trapezoidal portions; The fourth stage ladder end face of coaxial fitting 4 and step conversion section 2 is connected;

Fig. 2,3 shows that the length of flat waveguide 1 inner chamber of the rectangle of a terminal shortcircuit equals a1;

The match block 3 of two symmetrical configuration, the upper base of its right-angled trapezium part equals a2, and going to the bottom equals a4, goes to the bottom and the distance of the flat waveguide of rectangle 3 inner chamber bottom surfaces equals b8; Its rectangle part length equals b1, the wide a2 that equals;

Coaxial fitting 4 external diameters equal a6, and inner core diameter equals a5;

Step conversion section 2 is a level Four hierarchic structure, and wherein first order ladder length equals a3, and the wide b3 that equals is high in h6; The second ladder length equals a3, and the wide b4 that equals is high in (h6+h5), and third level ladder length equals a3, and the wide b5 that equals is high in (h6+h5+h4); Fourth stage ladder is a mounting structure, and its upper surface length equals b6, and the wide a3 that equals is high in h2, and its following table face length equals h7, and the wide a3 that equals is high in h1; The distance of fourth stage rank end face and flat waveguide 1 inner chamber bottom surface equals b7;

According to the different operating frequency requirement, choose reasonable parameter a1, a2, a3, a4, a5, a6, b1, b2, b3, b4, b5, b6, b7, b8, h1, h2, h3, h4, h5, h6, h7 can realize the miniaturization and the little standing wave characteristic of the coaxial flat waveguide transformer of end-fire.

Good effect of the present utility model is:

The utility model does not comprise the trapezoidal transition section part of the coaxial flat waveguide transformer of general type by changing the prior art form, has realized coaxial line and the direct coupling of flat waveguide basic mode in flat waveguide, and device length reduces greatly.

Description of drawings

Fig. 1 is the utility model structural representation;

Fig. 2 is the utility model x-y direction size marking figure;

Fig. 3 is the utility model z direction size marking figure;

Fig. 4 is the utility model exemplary embodiments test curve;

Fig. 5 is the coaxial flat waveguide transformer of general type end-fire.

Specific embodiments

Below in conjunction with Fig. 1, Fig. 2, Fig. 3, Fig. 4, the utility model is described in further detail by embodiment.

Embodiment:

The coaxial flat waveguide transformer of miniaturization end-fire does not contain the trapezoidal transition section that the coaxial flat waveguide transformer of general type end-fire is had, and only comprises: the flat waveguide 1 of the rectangle of a terminal shortcircuit, the match block 3 of 2, two symmetrical configuration of step conversion section, coaxial fitting 4;

The length of flat waveguide 1 inner chamber of the rectangle of one terminal shortcircuit equals a1;

Step conversion section 2 is a level Four hierarchic structure, and wherein first order ladder length equals a3, and the wide b3 that equals is high in h6; The second ladder length equals a3, and the wide b4 that equals is high in (h6+h5), and third level ladder length equals a3, and the wide b5 that equals is high in (h6+h5+h4); Fourth stage ladder is a mounting structure, and its upper surface length equals h7, and the wide a3 that equals is high in h2, and its following table face length equals h7, and the wide a3 that equals is high in h1; The distance of fourth stage ladder end face and flat waveguide 1 inner chamber bottom surface equals b7;

Parameter with respect to a certain frequency is selected as follows: a ₁=63.5mm, a ₂=6.8mm, a ₃=7.8mm, a ₄=21.8mm, a ₅=1.3mm, a ₆=4.1mm, b ₁=11.5mm, b ₂=37.5mm, b ₃=4.4mm, b ₄=4.4mm, b ₅=4.4mm, b ₆=8.8mm, b ₇=2.2mm; h ₁=2.4mm, h ₂=7mm, h ₃=1.4mm, h ₄=1.8mm, h ₅=1.9mm, h ₆=1.9mm, h ₇=7mm.

Fig. 4 is the coaxial flat waveguide transformer standing wave of miniaturization end-fire that records with the HP8720ES vector network analyzer change curve with frequency, and in the 9.3-10.9GHz frequency band, standing wave is less than 1.2, and relative bandwidth is 15.8%, and device length is 50mm.The coaxial flat waveguide transformer of general type end-fire of a kind of same frequency range, same interface shape, its device length is 135mm, contrasts as seen, novel form of the present invention, length reduces greatly, has realized such miniaturization of devices.

Claims

1, the coaxial flat waveguide transformer of miniaturization end-fire, it is characterized in that: the coaxial flat waveguide transformer of said miniaturization end-fire does not contain the trapezoidal transition section that the coaxial flat waveguide transformer of general type end-fire is had, only comprise: the flat waveguide of the rectangle of a terminal shortcircuit (1), step conversion section (2), the match block of two symmetrical configuration (3), coaxial fitting (4);

The flat waveguide of the rectangle of one terminal shortcircuit (1) is the blind cavity configuration of cuboid, and the match block of two symmetrical configuration (3) symmetry is installed in the position of the flat waveguide of rectangle (1) inner chamber near narrow limit, and the structure of match block (3) comprises right-angled trapezium and rectangle two parts; Step conversion section (2) is positioned between two match block (3) trapezoidal portions; The fourth stage ladder end face of coaxial fitting (4) and step conversion section (2) is connected.

2, the coaxial flat waveguide transformer of miniaturization end-fire according to claim 1 is characterized in that:

The length of the flat waveguide of the rectangle of one terminal shortcircuit (1) inner chamber is a ₁=63.5mm;

The match block of two symmetrical configuration (3), the upper base of its right-angled trapezium part is a ₂=6.8mm, going to the bottom is a ₄=21.8mm; Its rectangle part is long to be b ₁=11.5mm, wide is a ₂=6.8mm; Coaxial fitting (4) external diameter is a ₆=4.1mm, inner core diameter is a ₅=1.3mm;

Step conversion section (2) is a level Four hierarchic structure, and wherein first order ladder is long is a ₃=7.8mm, wide is b ₃=4.4mm, height is h.=1.9mm; Second ladder is long to be a ₃=7.8mm, wide is b ₄=4.4mm, high in (h6+h5), third level ladder is long to be a ₃=7.8mm, wide is b ₅=4.4mm is high in (h6+h5+h4); Fourth stage ladder is a mounting structure, and its upper surface is long to be b ₆=8.8mm, wide is a ₃=7.8mm, height is h ₂=7mm, its following table face length is h ₇=7mm, wide is a ₃=7.8mm, height is h ₁=2.4mm; The distance of fourth stage ladder end face and flat waveguide (1) inner chamber bottom surface is h ₇=7mm.