CN202616401U

CN202616401U - Waveguide feed slot antenna

Info

Publication number: CN202616401U
Application number: CN 201220286532
Authority: CN
Inventors: 王清源; 谭宜成; 吴涛
Original assignee: Chengdu Sinoscite Technology Co Ltd
Current assignee: Chengdu Sinoscite Technology Co Ltd
Priority date: 2012-06-19
Filing date: 2012-06-19
Publication date: 2012-12-19
Anticipated expiration: 2022-06-19

Abstract

The utility model discloses a waveguide feed slot antenna comprising an input rectangular waveguide, a radiation port and a least two rectangular waveguide sections for connecting the input rectangular waveguide with the radiation port, every two rectangular waveguide connecting sections are connected with each other, and the input rectangular waveguide is higher than the radiation port; the lengths of the rectangular waveguide connecting sections are B, and the waveguide lengths of dies TE10 of the rectangular waveguide connecting sections at the highest frequency of a work frequency band are C, wherein B is less than or equal to C/6. The waveguide feed slot antenna has the beneficial effects that the connecting surface of each rectangular waveguide has large intermittence, so that the waveguide feed slot antenna can meet the design requirement on certain reflection coefficient in a frequency band, and the lengths of the connecting rectangular waveguide sections are 1/6 smaller than the waveguide lengths of the main die TE10 of the connecting waveguide sections at the highest frequency of the work frequency section.

Description

A kind of waveguide feed slot antenna

Technical field

The utility model relates to a kind of waveguide feed slot antenna, particularly a kind of compact waveguide feed slot antenna of being made up of the alternate rectangular waveguide of height.

Background technology

The slot antenna of waveguide feed can be realized towards the one-sided radiation of big plain film.Transmission TE10 mould in the waveguide, the broadband L of waveguide must be greater than 1/2nd wavelength (to transmit energy) and less than wavelength (to suppress the transmission of higher mode).The slit of broad ways horizontal stretching, the vertical polarized wave of radiation on the normal orientation of conductor piece.The key of this waveguide feed slot antenna is to realize the impedance matching of input rectangular waveguide and slit (being the radiation port).Traditional way is in the short transverse gradual change, perhaps between the two, adds quarter wavelength impedance transducer, and then can realize impedance matching.For the broadening working band, common practice both domestic and external is to add the more piece impedance transformer, theoretically; The progression of more piece converter is many more; Its coupling frequency band is wide more, because of n joint converter has n transforming section, (n+1) individual joint face, (n+1) individual reflected wave is arranged correspondingly; When these reflected waves turn back to top; Superimposed with certain phase place (depending on its progressive error) and amplitude each other, the result of numerous reflected wave stacks that amplitude is very little, phase place is different always has some ripples and cancels each other out or partial offset, thereby makes total reflected wave in the frequency band of broad, keep less value.When the major defect of this converter is frequency band broadening, the increase of size and the raising of cost.

The utility model content

The purpose of the utility model is to provide a kind of waveguide feed slot antenna of compact conformation, and its size is little, and cost is low.

To achieve these goals; The technical scheme that the utility model adopts is following: a kind of waveguide feed slot antenna; Comprise the input rectangular waveguide, radiation port, and at least 2 joint connection rectangular waveguide sections that connect the two; Said connection rectangular waveguide section interconnects in twos, and the height of input rectangular waveguide is greater than the height of radiation port; The length of said connection rectangular waveguide section is B, and at the highest frequency place of working frequency range, this connects the guide wavelength C of the TE10 mould of rectangular waveguide section, B≤C/6.

Because B≤C/6, so the structure of the utility model is compact more.

The height that is connected the rectangular waveguide section that links to each other with the input rectangular waveguide is less than the height of input rectangular waveguide.

The height that is connected the rectangular waveguide section that links to each other with the radiation port is greater than the height of radiation port.

To connect the rectangular waveguide section respectively with input rectangular waveguide and spoke side interruption-forming difference in height, can form capacitance structure.

To the radiation port direction, the height height of all connection rectangular waveguide sections is alternate from the input rectangular waveguide, and adjacent two connect the difference A that there is height in the rectangular waveguide section, A >=30%.Promptly connect in the rectangular waveguide section at adjacent two, low near the aspect ratio of the connection rectangular waveguide section of importing rectangular waveguide near the height of the connection rectangular waveguide section of radiation port, promptly there is difference in height between them, its difference in height is A.In order to reduce the joint number that connects the rectangular waveguide section; Reach the purpose of miniaturization impedance transformer design; Two wherein adjacent differences in height that connect the rectangular waveguide section must have a bigger value, form a sudden change, thereby the joint number of the connection rectangular waveguide section that needs can reduce promptly.Draw through experimental study, difference in height A is 30% o'clock, is preferable states, promptly near the aspect ratio of the connection rectangular waveguide section of the input rectangular waveguide height low 30% near the connection rectangular waveguide section of radiation port.Fig. 4 is the contrast table of joint number and difference in height, and the difference in height A in the utility model is 30% o'clock, jumping phenomenon occurs; The joint number that promptly connects the rectangular waveguide section diminishes, and is 10% between 30% the time at difference in height A, and the joint number of the connection rectangular waveguide section of use is basically all more than tens joints; When difference in height A was 30%, joint number became 4 joints, and other parameters are unaffected simultaneously; Therefore difference in height A >=30% o'clock helps the miniaturization Design of waveguide impedance transformer.

Further, in order to reduce the volume of the utility model, from the input rectangular waveguide to the radiation port direction, higher connection rectangular waveguide section from the direction of height to axial bending.Wherein axially point to radiation port direction or radiation port sensing input rectangular waveguide direction for the input rectangular waveguide.

Further, the utility model also can make all connection rectangular waveguide sections from the height direction to axial bending.Like this, higher connection rectangular waveguide section forms warp architecture, compares like this under the unbending situation of connection rectangular waveguide section in the utility model, and volume is littler.

Further,, can carry out large batch of production in order to make the convenient processing of the utility model, said input rectangular waveguide, radiation port direction, and the width of connection rectangular waveguide section is identical.

The operation principle of the utility model: electromagnetic wave signal gets into from the input rectangular waveguide; Discontinuity place in connecting the rectangular waveguide section; Will produce reflected wave, when these reflected waves turn back to converter top, superimposed with certain phase place (depending on its progressive error) and amplitude each other; The result of numerous reflected wave mutual superposition that amplitude is big, phase place is different always has some ripples and cancels each other out or partial offset, thereby makes total reflected wave in the frequency band of broad, keep less value.

Compared with prior art; The beneficial effect of the utility model is: there is bigger discontinuity in the joint face of each rectangular waveguide; Make the utility model can in frequency band, satisfy designing requirement to certain reflection coefficient, and the length that connects the rectangular waveguide section should connect less than working band maximum operating frequency place waveguide segment main mould TE10 mould guide wavelength 1/6.

Description of drawings

Fig. 1 is the longitudinal sectional drawing of the utility model.

Fig. 2 is the complete symmetric case sketch map of Fig. 1.

Fig. 3 be Fig. 1 one of them than higher waveguide from the sketch map of short transverse to axial bending.

Fig. 4 is the contrast table of joint number and difference in height.

Fig. 5 be the waveguide feed slot antenna volume be connected rectangular waveguide segment length relation table.

Label among the figure is expressed as respectively: 1, input rectangular waveguide; 2, radiation port; 3, connect the rectangular waveguide section.

Embodiment

Below in conjunction with embodiment the utility model is done to specify further, but the utility model execution mode is not limited thereto.

Embodiment

Like Fig. 1,2,3,4, shown in 5, among Fig. 1 → be expressed as length direction, ↑ being expressed as short transverse, ⊕ is expressed as the Width that outside paper, points in the paper.

Compact more for what the structure of the utility model was done; Therefore, a kind of waveguide feed slot antenna of the utility model design comprises input rectangular waveguide 1; Radiation port 2; And at least 2 joint connection rectangular waveguide sections 3 that connect the two, said connection rectangular waveguide section 3 interconnects in twos, and the height of input rectangular waveguide 1 is greater than the height of radiation port 2; The length of said connection rectangular waveguide section 3 is B, and at the highest frequency place of working frequency range, this connects the guide wavelength C of the TE10 mould of rectangular waveguide section 3, B≤C/6.

The height that is connected rectangular waveguide section 3 that links to each other with input rectangular waveguide 1 is less than the height of input rectangular waveguide 1.The height that is connected rectangular waveguide section 3 that links to each other with radiation port 2 is greater than the height of radiation port 2.To connect rectangular waveguide section 3 and form difference in height with input rectangular waveguide 1 and radiation port 2 respectively, can form capacitance structure.

To radiation port 2 directions, the height height of all connection rectangular waveguide sections 3 is alternate from input rectangular waveguide 1, and adjacent two connect the difference A that there is height in rectangular waveguide section 3, A >=30%.Promptly connect in the rectangular waveguide section at adjacent two, low near the aspect ratio of the connection rectangular waveguide section of importing rectangular waveguide 1 near the height of the connection rectangular waveguide section of radiation port 2, promptly there is difference in height between them, its difference in height is A.In order to reduce the joint number that connects the rectangular waveguide section; Reach the purpose of miniaturization impedance transformer design; Two wherein adjacent differences in height that connect the rectangular waveguide section must have individual higher value, form a sudden change, thereby the joint number of the connection rectangular waveguide section that needs can reduce promptly.Draw through experimental study, difference in height A is 30% o'clock, is preferable states, promptly near the aspect ratio of the connection rectangular waveguide section of input rectangular waveguide 1 height low 30% near the connection rectangular waveguide section of radiation port 2.Fig. 4 is the contrast table of joint number and difference in height, and the difference in height A in the utility model is 30% o'clock, jumping phenomenon occurs, and the joint number that promptly connects the rectangular waveguide section diminishes.At difference in height A is 10% between 30% the time, and the joint number of the connection rectangular waveguide section of use is basically all more than tens joints, when difference in height A is 30%; Joint number becomes 4 joints; Simultaneously other parameters are unaffected, therefore with difference in height A >=30% o'clock, help the miniaturization Design of waveguide impedance transformer.

As shown in Figure 5, based on a kind of compact waveguide feed slot antenna of said mechanism design; Fig. 5 be the waveguide feed slot antenna volume be connected rectangular waveguide segment length relation table, from Fig. 5, we find out, when B≤C/6, when promptly B was C/6 or C/7 or C/8 or C/9 or C/10, the volume of waveguide feed slot antenna was more and more littler.

Further, in order to reduce the volume of the utility model, from input rectangular waveguide 1 to radiation port 2 directions, higher connection rectangular waveguide section from the direction of height to axial bending.Wherein axially point to radiation port 2 directions or radiation port 2 sensing input rectangular waveguides 1 direction for input rectangular waveguide 1.

Further, the utility model also can make all connection rectangular waveguide sections from the height direction to axial bending.

Further,, can carry out large batch of production in order to make the convenient processing of the utility model, said input rectangular waveguide 1, radiation port 2 directions, and it is identical to connect the width of rectangular waveguide section 3.

Just can realize the utility model preferably as stated.

Claims

1. waveguide feed slot antenna; It is characterized in that: comprise input rectangular waveguide (1); Radiation port (2); And at least 2 joint connection rectangular waveguide sections (3) that connect the two, said connection rectangular waveguide section (3) interconnects in twos, and the height of input rectangular waveguide (1) is greater than the height of radiation port (2); The length of said connection rectangular waveguide section (3) is B, and at the highest frequency place of working frequency range, this connects the guide wavelength C of the TE10 mould of rectangular waveguide section (3), B≤C/6.

2. a kind of waveguide feed slot antenna according to claim 1 is characterized in that: the height that is connected rectangular waveguide section (3) that links to each other with input rectangular waveguide (1) is less than the height of input rectangular waveguide (1).

3. a kind of waveguide feed slot antenna according to claim 2 is characterized in that: the height that is connected rectangular waveguide section (3) that links to each other with radiation port (2) is greater than the height of radiation port (2).

4. a kind of waveguide feed slot antenna according to claim 3; It is characterized in that: from importing rectangular waveguide (1) to radiation port (2) direction; The height height of all connection rectangular waveguide sections (3) is alternate; Adjacent two connect the difference A that there is height in rectangular waveguide section (3), A >=30%.

5. a kind of waveguide feed slot antenna according to claim 4 is characterized in that: from the input rectangular waveguide (1) to radiation port (2) direction, higher connection rectangular waveguide section from the height direction to axial bending.

6. according to any described a kind of waveguide feed slot antenna among the claim 1-5, it is characterized in that: said input rectangular waveguide (1), radiation port (2), and the width of connection rectangular waveguide section (3) is identical.