Miniaturized waveguide power divider and waveguide slot antenna array with same

Abstract

The utility model discloses a miniaturized waveguide power divider and a waveguide slot antenna array with the power divider, comprising a T-shaped power divider main body, the T-shaped power divider main body adopts a ridge waveguide, the ridge upper side of the T-shaped junction of the T-shaped power divider main body is provided with a first branch knot recessed in the T-shaped power divider main body, and the T-shaped junction of the T-shaped power divider main body is provided with a second branch knot recessed in the T-shaped power divider main body. The left side of the lower side of the ridge of the T-shaped junction of the T-shaped power divider main body is provided with a second branch which is recessed in the T-shaped new power divider main body, and the right side of the lower side of the ridge of the T-shaped junction of the T-shaped power divider main body is provided with a third branch which is recessed in the T-shaped new power divider main body. The size of the power divider is reduced by adopting the ridge waveguide, the discontinuity of the T-shaped junction is reduced by adopting the design of the three branches, and the impedance matching of the antenna is optimized by adjusting the height and length of the three branches, so that the miniaturization of the power divider is finally realized.

Description

Technical Field

[0001] This utility model relates to a power divider and a waveguide slot antenna array, particularly a miniaturized waveguide power divider and a waveguide slot antenna array having the power divider, belonging to the field of antenna technology. Background Technology

[0002] Chinese Patent Publication No. CN119209035A discloses a differentially fed waveguide slot antenna array. The differential feeding network is relatively compact and is on the same side of the waveguide antenna, so only two waveguide layers are needed to achieve the desired effect, reducing costs and eliminating the need for one layer of installation.

[0003] This design offers a more compact structure compared to existing technologies, significantly reducing the overall antenna thickness and requiring only two waveguide layers. However, existing power dividers are still relatively thick and bulky, hindering the distribution of the length difference between the two feed lines. To further optimize the antenna's thickness and size, it is necessary to design a miniaturized waveguide power divider. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a miniaturized waveguide power divider and a waveguide slot antenna array having the power divider, thereby reducing the overall size of the waveguide slot antenna array.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A miniaturized waveguide power divider includes a T-shaped power divider body, wherein the T-shaped power divider body adopts a ridge waveguide, a first branch recessed into the T-shaped power divider body is provided on the upper side of the ridge of the T-shaped junction of the T-shaped power divider body, a second branch recessed into the T-shaped power divider body is provided on the lower left side of the ridge of the T-shaped junction of the T-shaped power divider body, and a third branch recessed into the T-shaped power divider body is provided on the lower right side of the ridge of the T-shaped junction of the T-shaped power divider body.

[0007] Furthermore, the lower end of the T-shaped power divider body is bent to one side and parallel to the other two ends of the T-shaped power divider body.

[0008] Furthermore, the two ends of the first, second, and third branches are concave arc shapes.

[0009] Furthermore, the width l1 of the T-type power divider body is 1.45mm, the height h1 of the T-type power divider body is 0.8mm, the width l2 of the ridge of the T-type power divider body is 0.45mm, and the height h2 of the ridge of the T-type power divider body is 0.6mm.

[0010] Furthermore, the height h3 of the first branch is 0.44 mm, and the length l3 of the first branch is 1.9 mm.

[0011] Furthermore, the height h4 of the second and third branches is 0.36 mm, and the lateral length l4 between the second and third branches is 1.9 mm.

[0012] A waveguide slot antenna array includes a miniaturized waveguide power divider, a first feed line, a second feed line, and a radiating element. The first output terminal of the miniaturized waveguide power divider is connected to one end of the first feed line, and the other end of the first feed line is connected to one end of the radiating element. The second output terminal of the miniaturized waveguide power divider is connected to one end of the second feed line, and the other end of the second feed line is connected to the other end of the radiating element.

[0013] Furthermore, the radiation unit is provided with a first radiation slot group and a second radiation slot group, which are distributed symmetrically about the center point of the radiation unit.

[0014] Furthermore, choke grooves are provided on both sides of the radiation unit.

[0015] Furthermore, the first and second radiating slot groups each contain four radiating slots, and the first and second feed lines have a length difference X such that the signal phase difference between the first and second feed lines is 180°.

[0016] Compared with the prior art, this utility model has the following advantages and effects: This utility model discloses a miniaturized waveguide power divider and a waveguide slot antenna array with the power divider. The ridge waveguide is used to reduce the size of the power divider. The design of three stubs reduces the discontinuity of the T-junction. By adjusting the height and length of the three stubs, the impedance matching of the antenna is optimized, and the miniaturization of the power divider is finally achieved. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a miniaturized waveguide power divider according to the present invention.

[0018] Figure 2 This is a top view of a miniaturized waveguide power divider according to this utility model.

[0019] Figure 3 This is a schematic diagram of the waveguide slot antenna array of this utility model.

[0020] Figure 4 This is an S-parameter curve of a miniaturized waveguide power divider according to this utility model.

[0021] Figure 5 This is a limit curve diagram of a miniaturized waveguide power divider according to this utility model. Detailed Implementation

[0022] To elaborate on the technical solutions adopted by this utility model to achieve the intended technical objectives, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Furthermore, the technical means or technical features in the embodiments of this utility model can be replaced without creative effort. The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0023] like Figure 1 and Figure 2 As shown, this utility model discloses a miniaturized waveguide power divider, which includes a T-shaped power divider body and adopts a ridge waveguide. The upper side of the ridge of the T-shaped junction of the T-shaped power divider body is provided with a first branch 1 recessed in the T-shaped power divider body, the lower left side of the ridge of the T-shaped junction of the T-shaped power divider body is provided with a second branch 2 recessed in the T-shaped power divider body, and the lower right side of the ridge of the T-shaped junction of the T-shaped power divider body is provided with a third branch 3 recessed in the T-shaped power divider body.

[0024] The lower end of the T-shaped power divider body is bent to one side and parallel to the other two ends of the T-shaped power divider body. That is, the lower end of the T-shaped power divider body is bent at 90 degrees and the bent part is transitioned with an arc, so as to make the power divider size more compact.

[0025] The ends of the first branch 1, the second branch 2, and the third branch 3 are concave arc shapes. It should be noted that the lengths of the first branch 1, the second branch 2, and the third branch 3 are calculated based on the actual extension path along the branch centerline from the midpoint of the arc shape at both ends. Furthermore, the midpoint of the arc shape at the end of the second branch 2 and the third branch 3 closest to the lower end of the T-shaped power divider body is located on the lower edge of the transverse portion of the T-shaped power divider body. This means that the second branch 2 and the third branch 3 together form a large branch parallel to the first branch 1.

[0026] The width l1 of the T-type power divider body is 1.45mm, the height h1 of the T-type power divider body is 0.8mm, the width l2 of the ridge of the T-type power divider body is 0.45mm, and the height h2 of the ridge of the T-type power divider body is 0.6mm.

[0027] The height h3 of the first branch is 0.44 mm, and the length l3 of the first branch is 1.9 mm.

[0028] The height h4 of the second and third branches is 0.36 mm, and the lateral length l4 between the second and third branches is 1.9 mm.

[0029] This utility model discloses a miniaturized waveguide power divider and a waveguide slot antenna array with the power divider. The power divider is reduced in size by using a ridge waveguide, and the three-stub design reduces the discontinuity of the T-junction. The impedance matching of the antenna is optimized by adjusting the height and length of the three stubs, and the miniaturization of the power divider is finally achieved.

[0030] like Figure 3 As shown, a waveguide slot antenna array includes a miniaturized waveguide power divider 4, a first feed line 5, a second feed line 6, and a radiating element 7. The first output terminal of the miniaturized waveguide power divider 4 is connected to one end of the first feed line 5, and the other end of the first feed line 5 is connected to one end of the radiating element 7. The second output terminal of the miniaturized waveguide power divider 4 is connected to one end of the second feed line 6, and the other end of the second feed line 6 is connected to the other end of the radiating element 7. The signal is input from the lower input terminal of the miniaturized waveguide power divider 4, and is split into two equal signals that enter the first feed line 5 and the second feed line 6 respectively, and then input to the radiating element 7 via the first feed line 5 and the second feed line 6. By using a miniaturized waveguide power divider, the overall thickness of the waveguide slot antenna array can be reduced. Furthermore, due to the overall reduction in the size of the power divider, more space is available for adjusting the length difference between the two feed lines, facilitating the overall antenna design. If the available space is small, the feed lines need to extend to both sides to achieve the length difference, increasing the overall antenna size.

[0031] The radiation unit 7 is provided with a first radiation slot group 8 and a second radiation slot group 9, which are distributed symmetrically with respect to the center point of the radiation unit.

[0032] The radiation unit 7 has choke slots 10 on both sides to reduce surface waves and adjust the beam width of the E-plane radiation pattern.

[0033] The first radiating slot group 8 and the second radiating slot group 9 each contain four radiating slots. The first feed line 5 and the second feed line 6 have a length difference X such that the signal phase difference between the first feed line 5 and the second feed line 6 is 180°. Using a differential feeding scheme, the signal is split into positive and negative paths during transmission; this process is called differential transmission. Because the two signals have different polarities, they can cancel out some interference during transmission, thus ensuring more stable signal transmission and preventing the sidelobes from deteriorating due to interference.

[0034] like Figure 4 , Figure 5The figure shows the S-parameters and phase curves of the miniaturized waveguide power divider of this invention. Within the 74-81 GHz frequency band, S11 is less than -15 dB, the energy transmitted from the input to both outputs is -3.05 dB, the amplitude fluctuation is less than 0.05 dB, and the phase difference is ±0.1°. This demonstrates that the miniaturized waveguide power divider of this invention achieves both miniaturization and excellent performance.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present utility model's technical solution, based on the technical essence of the present utility model and within the spirit and principles of the present utility model, shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. A miniaturized waveguide power divider, characterized in that: It includes a T-type power divider body and the T-type power divider body adopts a ridge waveguide. The upper side of the ridge of the T-type junction of the T-type power divider body is provided with a first branch recessed in the T-type power divider body. The lower left side of the ridge of the T-type junction of the T-type power divider body is provided with a second branch recessed in the T-type power divider body. The lower right side of the ridge of the T-type junction of the T-type power divider body is provided with a third branch recessed in the T-type power divider body.

2. The miniaturized waveguide power divider according to claim 1, characterized in that: The lower end of the T-shaped power divider body is bent to one side and parallel to the other two ends of the T-shaped power divider body.

3. A miniaturized waveguide power divider according to claim 1, characterized in that: The ends of the first, second, and third branches are concave arc shapes.

4. A miniaturized waveguide power divider according to claim 1, characterized in that: The width l1 of the T-type power divider body is 1.45mm, the height h1 of the T-type power divider body is 0.8mm, the width l2 of the ridge of the T-type power divider body is 0.45mm, and the height h2 of the ridge of the T-type power divider body is 0.6mm.

5. A miniaturized waveguide power divider according to claim 4, characterized in that: The height h3 of the first branch is 0.44 mm, and the length l3 of the first branch is 1.9 mm.

6. A miniaturized waveguide power divider according to claim 4, characterized in that: The height h4 of the second and third branches is 0.36 mm, and the lateral length l4 between the second and third branches is 1.9 mm.

7. A waveguide slot antenna array, characterized in that: The device comprises a miniaturized waveguide power divider as described in any one of claims 1-6, a first feed line, a second feed line, and a radiating unit. The first output terminal of the miniaturized waveguide power divider is connected to one end of the first feed line, and the other end of the first feed line is connected to one end of the radiating unit. The second output terminal of the miniaturized waveguide power divider is connected to one end of the second feed line, and the other end of the second feed line is connected to the other end of the radiating unit.

8. A waveguide slot antenna array according to claim 7, characterized in that: The radiation unit is provided with a first radiation slot group and a second radiation slot group, which are distributed symmetrically about the center point of the radiation unit.

9. A waveguide slot antenna array according to claim 7, characterized in that: Choke slots are provided on both sides of the radiation unit.

10. A waveguide slot antenna array according to claim 8, characterized in that: The first and second radiation slot groups each contain four radiation slots, and the first and second feed lines have a length difference X such that the signal phase difference between the first and second feed lines is 180°.

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