Broadband compact type circular polarization probe

Abstract

The invention discloses a broadband compact circularly polarized probe, and relates to the technical field of circularly polarized antennas. The circular polarization probe comprises a feed part and a radiation part, a standard waveguide channel is formed in the feed part, a parallel waveguide channel is formed in the radiation part, the standard waveguide channel is communicated with the parallel waveguide channel, the length of the parallel waveguide channel is smaller than one wavelength, and the radiation part is communicated with the standard waveguide channel. And a slot is formed in the wide edge of the outer side port of the parallel waveguide channel. The circularly polarized probe is simple in structure, the space size and the use difficulty can be greatly reduced in practical application and array formation, and the practical processing and use cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of circularly polarized antennas, and in particular to a broadband compact circularly polarized probe. Background Art

[0002] A circularly polarized probe is an antenna structure used to receive or transmit circularly polarized electromagnetic wave signals. Producing circularly polarized waves requires three conditions: a 90° spatial phase difference, a 90° transmission phase difference, and equal amplitude. In traditional waveguide structures, the electric field distribution is primarily concentrated in the x-direction, with very little electric field in the y-direction, making it difficult to achieve a 90° spatial phase difference. Furthermore, traditional circularly polarized radiating structures require dual-port feeding and are complex in their radiation structure, making them difficult to manufacture and use. Especially when used in arrays, traditional circularly polarized radiating structures occupy a large space, making them impractical for use in confined spaces. Furthermore, the relatively complex feed structure leads to high manufacturing costs. Summary of the Invention

[0003] The technical problem to be solved by the present invention is how to provide a broadband compact circular polarization probe with a simple structure and low manufacturing cost.

[0004] To solve the above technical problems, the technical solution adopted by the present invention is: a broadband compact circular polarization probe, including a feeding part and a radiating part, wherein a standard waveguide channel is formed in the feeding part, and a parallel waveguide channel is formed in the radiating part, wherein the standard waveguide channel is connected to the parallel waveguide channel, and the length of the parallel waveguide channel is less than one wavelength. The wide sides of the outer ports of the parallel waveguide channel are formed with slots. The slot depth and slot width are adjusted to enhance the electric field in the y direction while maintaining the electric field in the x direction.

[0005] The beneficial effect of adopting the above technical solution lies in that the parallel waveguides of the radiating portion are reduced to less than one wavelength, and narrow slots are provided along the broadside. Adjusting the slot depth and width enhances the electric field in the y-direction while maintaining the electric field in the x-direction. This design simplifies the structure of the circularly polarized probe, significantly reducing the size and difficulty of use in practical applications and array configurations, thereby lowering actual manufacturing and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0007] Figure 1 1 is a schematic structural diagram of the circular polarization probe according to the first embodiment of the present invention; Figure 2 1 is a schematic structural diagram of the circular polarization probe according to the first embodiment of the present invention; Figure 31 is a schematic cross-sectional view of the circular polarization probe according to the first embodiment of the present invention; Figure 4 1 is a schematic structural diagram of the circular polarization probe according to the second embodiment of the present invention; Figure 5 1 is a schematic structural diagram of the circular polarization probe according to the second embodiment of the present invention; Figure 6 2 is a schematic cross-sectional view of the circular polarization probe according to the second embodiment of the present invention; Figure 7 1 is a schematic structural diagram of the circular polarization probe according to the third embodiment of the present invention; Figure 8 1 is a schematic structural diagram of the circular polarization probe according to the third embodiment of the present invention; Figure 9 2 is a schematic cross-sectional view of the circular polarization probe according to the third embodiment of the present invention; Figure 10 1 is a schematic structural diagram of the circular polarization probe according to the fourth embodiment of the present invention; Figure 11 1 is a schematic structural diagram of the circular polarization probe according to the fourth embodiment of the present invention; Figure 12 2 is a schematic cross-sectional structural diagram of the circular polarization probe according to the fourth embodiment of the present invention; Among them: 1. Feeding part; 1-1. Flange body; 1-2. Rectangular boss connection part; 1-3. Transition connection part; 1-4. Mounting hole; 1-5. Positioning hole; 2. Radiating part; 3. Standard waveguide channel; 4. Parallel waveguide channel; 5. Slot; 6. Standard waveguide interface; 7. Positioning pin. DETAILED DESCRIPTION

[0008] The following is a clear and complete description of the technical solutions in the embodiments of the present invention, in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts are within the scope of protection of the present invention.

[0009] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0010] like Figures 1-12As shown, an embodiment of the present invention discloses a broadband, compact circular polarization probe. Furthermore, the circular polarization probe is made of metal, preferably brass. The circular polarization probe includes a feeder 1 and a radiator 2. A standard waveguide channel 3 is formed within the feeder 1, and a parallel waveguide channel 4 is formed within the radiator 2. The standard waveguide channel 3 is connected to the parallel waveguide channel 4. The length of the parallel waveguide channel 4 is less than one wavelength (the wavelength is calculated based on the low frequency or center frequency of the operating frequency band). A slot 5 is formed on the wide side of the outer port of the parallel waveguide channel 4.

[0011] Further, such as Figure 1 、 Figure 4 、 Figure 7 as well as Figure 10 As shown, the feeder 1 includes a flange body 1-1. A rectangular boss connection portion 1-2 is formed on the end face of the flange body 1-1 near the radiating portion 2. A transition connection portion 1-3 is formed on the rectangular boss connection portion 1-2. The cross-section of the transition connection portion 1-3 gradually decreases. The transition connection portion 1-3 is used to connect to the radiating portion 2. A standard waveguide channel 3 is formed in the center of the flange body 1-1, the rectangular boss connection portion 1-2, and the transition connection portion 1-3. Standard waveguide interfaces 6 are formed at the inner and outer ends of the standard waveguide channel. Several mounting holes 1-4 and positioning holes 1-5 are formed along the outer periphery of the flange body 1-1. The feeder 2 has an overall rectangular structure, and the inner end of the parallel waveguide channel 4 in the feeder is connected to the inner port of the standard waveguide channel 3.

[0012] Furthermore, the specific shapes of the slot 5 can be at least the following: First, the slot 5 can be triangular, and the triangular slot along the two opposite surfaces of the radiation port surface structure of the outer port of the parallel waveguide channel 4 has a part of structure overlapped when vertically projected. Second, the slot 5 can also be fan-shaped, and the fan-shaped slot along the two opposite surfaces of the radiation port surface structure of the outer port of the parallel waveguide channel 4 has a part of structure overlapped when vertically projected. Third, the slot 5 can also be circular, and the circular slot along the two opposite surfaces of the radiation port surface structure of the outer port of the parallel waveguide channel 4 has a part of structure overlapped when vertically projected. Fourth, the slot 5 can also be irregular, and the irregular slot along the two opposite surfaces of the radiation port surface structure of the outer port of the parallel waveguide channel 4 has a part of structure overlapped when vertically projected. It should be noted that the specific shape of the slot 5 can also be other shapes, which will not be elaborated here.

[0013] In traditional waveguide structures, the electric field distribution is primarily concentrated in the x-direction, while the electric field in the y-direction is very weak, making it difficult to achieve a 90° spatial phase difference. To address this issue, the parallel waveguides in the radiating section are reduced to less than one wavelength, and narrow slots are introduced along the broadside. Adjusting the slot depth and width enhances the electric field in the y-direction while maintaining the electric field in the x-direction. Adjusting the slot depth and width enhances the electric field in the y-direction while maintaining the electric field in the x-direction, thereby achieving a satisfactory radiation state. Adjusting the slot shape and size can control the electromagnetic wave radiation state. Compared to traditional circularly polarized radiating structures, this probe has a simpler structure, significantly reducing the space required and the difficulty of use in practical applications and array formation, thereby lowering the actual processing and operating costs.

Claims

1. A broadband compact circular polarization probe, characterized in that: The invention comprises a feeding part (1) and a radiating part (2), wherein a standard waveguide channel (3) is formed in the feeding part (1), and a parallel waveguide channel (4) is formed in the radiating part (2), wherein the standard waveguide channel (3) is connected to the parallel waveguide channel (4), wherein the length of the parallel waveguide channel (4) is less than one wavelength, and a slot (5) is formed on the wide side of the outer port of the parallel waveguide channel (4), and the electric field in the y direction is enhanced by adjusting the slot depth and slot width while the electric field in the x direction remains unchanged.

2. The broadband compact circular polarization probe according to claim 1, wherein: The feeding part (1) comprises a flange body (1-1), a rectangular boss connecting part (1-2) is formed on the end face of the flange body (1-1) close to the radiating part (2), a transition connecting part (1-3) is formed on the rectangular boss connecting part (1-2), the cross section of the transition connecting part (1-3) gradually decreases, and the transition connecting part (1-3) is used to connect with the radiating part (2), a standard waveguide channel (3) is formed in the center of the flange body (1-1), the rectangular boss connecting part (1-2) and the transition connecting part (1-3), and a standard waveguide interface (6) is formed at the inner and outer ends of the standard waveguide channel.

3. The broadband compact circular polarization probe according to claim 2, wherein: A plurality of mounting holes (1-4) and positioning holes (1-5) are formed along the outer periphery of the flange body (1-1).

4. The broadband compact circular polarization probe according to claim 1, wherein: The feeding portion (2) is a rectangular structure as a whole, and the inner end of the parallel waveguide channel (4) in the feeding portion is connected to the inner port of the standard waveguide channel (3).

5. The broadband compact circular polarization probe according to claim 1, wherein: The slot (5) is triangular, and the triangular slot is along two opposite surfaces of the radiation port surface structure of the outer port of the parallel waveguide channel (4), and a portion of the structure overlaps when vertically projected.

6. The broadband compact circular polarization probe according to claim 1, wherein: The slot (5) is fan-shaped, and the fan-shaped slot is along two opposite surfaces of the radiation port surface structure of the outer port of the parallel waveguide channel (4), and a portion of the structure overlaps when vertically projected.

7. The broadband compact circular polarization probe according to claim 1, wherein: The slot (5) is circular, and the circular slot is along two opposite surfaces of the radiation port surface structure of the outer port of the parallel waveguide channel (4), and a portion of the structure overlaps when vertically projected.

8. The broadband compact circular polarization probe according to claim 1, wherein: The slots (5) are irregular in shape, and the irregular slots are along two opposite surfaces of the radiation port structure of the outer port of the parallel waveguide channel (4), and a portion of the structure overlaps when vertically projected.

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