Waveguide conversion device

Abstract

The utility model relates to the field of waveguide conversion, in particular to a waveguide conversion device, which comprises a waveguide piece, a circuit board and a reflecting piece, the waveguide piece is provided with a waveguide hole, the circuit board is provided with a clearance area, and the reflecting piece comprises a reflecting body; the waveguide hole, the clearance area and the reflection body are correspondingly arranged in sequence; a probe is arranged in the clearance area, the probe is in an axial symmetry shape, and the probe and the circuit board are integrally formed. The antenna is wide in relative bandwidth and simple in structure.

Description

Technical Field

[0001] The utility model relates to the field of waveguide conversion, in particular to a waveguide conversion device. Background Art

[0002] Grounded coplanar waveguide (CPWG) is widely used in microwave RF systems due to its small size, easy processing and integration, good shielding performance, and good heat dissipation performance. The signal transmission ports of many antennas are circular waveguide structures.

[0003] Existing E-plane probe waveguide coaxial converters, such as Figure 1 As shown, a waveguide 10 has a hole in its wall. A probe 20 connected to a coaxial cable is inserted perpendicularly through this hole into the waveguide 10. A short-circuit plate 30 is provided at one end of the waveguide 10, spaced a certain distance from the probe. The probe is electrically excited. Based on the even-odds principle, the probe excites the TE11 mode in the waveguide. The electromagnetic wave excited by the probe propagates in both left and right directions along the waveguide. The leftward-propagating electromagnetic wave reflects at the short-circuit plate 30 and superimposes with the rightward-propagating electromagnetic wave, propagating in the same direction. This achieves the conversion from a coaxial waveguide (TEM mode) to a circular waveguide (TE11 mode).

[0004] However, the existing probes are strip-shaped, resulting in a relatively narrow bandwidth, only reaching the 5.1-5.9 GHz frequency range and failing to cover the full Wi-Fi F7 frequency range. Secondly, the structure is complex. The probes need to be installed separately, which increases the assembly difficulty and production cost of the entire device. Finally, with the development of communication technology, higher transmission rates are required, which in turn requires improving the capacity and spectrum utilization of communication systems. However, due to the limitations of the existing structure, this cannot be achieved. The only option is to add probes and waveguides, which will undoubtedly increase the size of the antenna and significantly increase the cost. Utility Model Content

[0005] The technical problem to be solved by the present invention is to provide a waveguide conversion device with a relatively wide bandwidth and a simple structure.

[0006] The technical problem to be solved by the present invention is to provide a waveguide conversion device to achieve dual polarization conversion and improve the transmission rate.

[0007] In order to solve the above technical problems, the present invention provides a waveguide conversion device, comprising a waveguide component, a circuit board, and a reflector, wherein the waveguide component is provided with a waveguide hole, the circuit board is provided with a clearance zone, and the reflector comprises a reflective body; the waveguide hole, the clearance zone, and the reflective body are provided correspondingly and sequentially;

[0008] A probe is provided in the air-avoidance area. The probe is axially symmetrical, and the probe and the circuit board are integrally formed.

[0009] As an improvement to the above solution, the axisymmetric shape is an ellipse.

[0010] As an improvement of the above solution, the reflective body includes a reflective bottom plate arranged corresponding to the air avoidance zone, and the distance between the reflective bottom plate and the probe is a preset distance, and the preset distance is 1 / 5-1 / 3λ.

[0011] As an improvement to the above solution, the sizes and shapes of the waveguide hole, the air-avoidance area and the reflective bottom plate are adapted to each other.

[0012] As an improvement of the above solution, the reflective body further includes reflective side plates, which are arranged along the circumference of the reflective bottom plate, and the reflective bottom plate is fixedly connected to the circuit board through the reflective side plates.

[0013] As an improvement to the above solution, the reflective body is in the shape of a truncated cone;

[0014] The angle between the axis of the reflective side plate and the reflective body is a preset angle, and the preset angle is 5°-20°.

[0015] As an improvement to the above solution, the reflective member further includes a connecting plate, which is arranged on the outer side of the reflective side plate, and the reflective side plate is fixedly connected to the circuit board via the connecting plate.

[0016] As an improvement to the above solution, the probe is made of a conductive material;

[0017] The circuit board is provided with a grounded coplanar waveguide connected to the probe;

[0018] The reflector is provided with a notch, and the notch is arranged corresponding to the grounded coplanar waveguide, so as to separate the reflector and the grounded coplanar waveguide.

[0019] As an improvement to the above solution, the cross-section of the air avoidance zone is circular;

[0020] The probe includes a first probe and a second probe, wherein axes of the first probe and the second probe overlap with the radius of the air avoidance zone, and the axes of the first probe and the second probe are perpendicular to each other.

[0021] As an improvement to the above solution, a support frame is provided in the air avoidance area, and the first probe and the second probe are respectively provided on the support frame.

[0022] The implementation of this utility model has the following beneficial effects:

[0023] This new waveguide conversion device utilizes an axisymmetric probe to achieve broadband matching, reaching a frequency range of 5.1-7.125 GHz, a relatively wide bandwidth. The probe and circuit board are integrally formed, eliminating the need for a separate probe. This simplified structure reduces assembly difficulty and production costs.

[0024] Furthermore, the probe of the utility model includes a first probe and a second probe, which exponentially increases the capacity and spectrum utilization of the communication system without increasing bandwidth, thereby improving the transmission rate. The dual-polarized coplanar antenna can achieve coplanar operation of two orthogonally polarized antennas, effectively reducing the antenna size and improving the aperture utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of an existing E-plane probe waveguide coaxial converter;

[0026] Figure 2 It is a structural schematic diagram of the waveguide conversion device of the utility model;

[0027] Figure 3 yes Figure 2 Structural diagram from another angle;

[0028] Figure 4 yes Figure 2 Exploded view of

[0029] Figure 5 yes Figure 2 sectional view of

[0030] Figure 6 yes Figure 5 A magnified view of point A;

[0031] Figure 7 yes Figure 4 Schematic diagram of the structure of the air avoidance area;

[0032] Figure 8 yes Figure 4 Schematic diagram of the structure of the reflector. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention will be further described in detail below with reference to the accompanying drawings. It is hereby stated that any directional terms such as "up," "down," "left," "right," "front," "back," "inside," and "outside" that appear or will appear in this document are based solely on the accompanying drawings and are not intended to limit the present invention.

[0034] See also Figure 2-8The utility model discloses a waveguide conversion device, including a waveguide component 1, a circuit board 2 and a reflector 3. The waveguide component 1 is provided with a waveguide hole 11, the circuit board 2 is provided with a clearing area 21, and the reflector 3 includes a reflective body 31; the waveguide hole 11, the clearing area 21 and the reflective body 31 are arranged correspondingly and in sequence.

[0035] A probe 4 is provided in the air-avoidance area 21 . The probe 4 is axially symmetrical, and the probe 4 and the circuit board 2 are integrally formed.

[0036] This new waveguide conversion device utilizes an axisymmetric probe to achieve broadband matching, reaching a frequency range of 5.1-7.125 GHz, a relatively wide bandwidth. The probe and circuit board are integrally formed, eliminating the need for a separate probe. This simplified structure reduces assembly difficulty and production costs.

[0037] It should be noted that the waveguide component 1 is provided with a connector 12 extending outward along the side wall of the waveguide hole 11, and the connector 12 is used to connect the waveguide tube.

[0038] Preferably, the axisymmetric shape is an ellipse.

[0039] Preferably, the probe 4 is made of a conductive material. More preferably, the conductive material is copper. The probe 4 extends from the circuit board 2 into the clearing zone 21. Therefore, the probe and circuit board are integrally formed, eliminating the need for a separate probe, simplifying the structure, and reducing the assembly difficulty and production cost of the entire device.

[0040] The circuit board 2 is provided with a grounded coplanar waveguide 22 connected to the probe 4 , and power is supplied to the probe via the grounded coplanar waveguide to achieve electrical excitation of the probe.

[0041] Specifically, the reflective body 31 includes a reflective base plate 311 arranged corresponding to the air avoidance zone 21, and the distance between the reflective base plate 311 and the probe 4 is a preset distance, and the preset distance is 1 / 5-1 / 3λ. More preferably, the preset distance is 1 / 4λ. The electromagnetic wave excited by the probe propagates in the left and right directions along the waveguide, that is, propagates in the direction of the reflective base plate and the direction of the waveguide hole respectively. The electromagnetic wave encounters the reflective base plate and propagates in the direction of the waveguide hole, and is superimposed with the electromagnetic wave originally propagating in the direction of the waveguide hole, realizing the conversion from coaxial waveguide (TEM mode) to circular waveguide (TE11 mode). The limitation of the preset distance range is conducive to the superposition of the reflected electromagnetic wave and the electromagnetic wave originally propagating in the direction of the waveguide hole in the same direction.

[0042] The waveguide hole 11, the air gap 21 and the reflective bottom plate 311 are adapted in size and shape. Preferably, the cross-sections of the waveguide hole 11, the air gap 21 and the reflective bottom plate 311 are all circular.

[0043] Preferably, the reflective body 31 further includes reflective side panels 312, which are arranged along the circumference of the reflective bottom plate 311. The reflective bottom plate 311 is fixedly connected to the circuit board 2 via the reflective side panels 312. The provision of the reflective side panels can connect and fix the reflective bottom plate and prevent electromagnetic waves from propagating outward and causing losses.

[0044] More preferably, the reflective body 31 is in the shape of a truncated cone; the angle between the reflective side plate 312 and the axis of the reflective body 31 is a preset angle, and the preset angle is 5°-20°. More preferably, the preset angle is 5°-15°. The reflective bottom plate constitutes the top surface of the truncated cone, the reflective side plate constitutes the side surface of the truncated cone, and the bottom of the truncated cone is provided with a reflection port, and the reflection port and the air avoidance zone are arranged correspondingly. The electromagnetic wave excited by the probe propagates toward the reflective bottom plate through the reflection port, and is reflected by the reflective bottom plate, and propagates in the direction of the waveguide hole after passing through the reflection port and the air avoidance zone. Among them, the reflective side plate also plays the role of a reflective electromagnetic plate. The limitation of the preset angle ensures that the two electromagnetic waves are superimposed in the same direction, and all the energy is transmitted in the direction of the waveguide hole, thereby achieving broadband matching.

[0045] Preferably, the reflector 3 further includes a connecting plate 32 disposed outside the reflective side plate 312. The reflective side plate 312 is fixedly connected to the circuit board 2 via the connecting plate 32. Specifically, the reflective side plate 312 is disposed along the outer periphery of the connecting plate 32 to prevent the connecting plate from covering the reflective opening. The connecting plate 32 is fixed to the circuit board 2 via screws, thereby securing the reflector to the circuit board.

[0046] The reflector 3 is made of metal. A notch 33 is provided on the reflector 3, corresponding to the grounded coplanar waveguide 22, to separate the reflector 3 from the grounded coplanar waveguide 22. The reflector is mounted on a circuit board to prevent contact between the reflector and the grounded coplanar waveguide core, which could cause a short circuit. The notch 33 is designed to avoid contact with the grounded coplanar waveguide 22. The notch 33 consists of a first notch on the reflector side plate and a second notch on the connecting plate, ensuring that the grounded coplanar waveguide does not contact the reflector.

[0047] More preferably, the cross-sectional shapes of the waveguide hole 11 , the air-avoidance area 21 and the reflection port are all circular.

[0048] Furthermore, the probe 4 includes a first probe 41 and a second probe 42, the axes of the first probe 41 and the second probe 42 overlap with the radius of the air avoidance zone 21, and the axes of the first probe 41 and the second probe 42 are perpendicular to each other. The arrangement of the first probe and the second probe exponentially increases the capacity and spectrum utilization of the communication system without increasing the bandwidth, thereby improving the transmission rate. The dual-polarization coplanar antenna can realize the coplanar operation of two pairs of orthogonal polarization antennas, effectively reducing the antenna size and improving the aperture utilization. The utility model can be used for dual-polarization antenna feeding. In order to realize the dual-polarization design, two probes connected to the grounded coplanar waveguide are perpendicular to each other and penetrate into the waveguide to excite two mutually orthogonal TE11 mode electromagnetic waves. The electromagnetic waves with mutually perpendicular electric fields are orthogonal to each other, thereby ensuring the isolation of the two signals.

[0049] Preferably, a support frame 23 is provided in the air-shielding area 21, and the first probe 41 and the second probe 42 are respectively provided on the support frame 23. The support frame 23 is preferably in a cross shape, and the first probe and the second probe are respectively provided on two adjacent support bars of the support frame, ensuring that the first probe and the second probe are arranged perpendicularly to each other inside the waveguide, thereby ensuring the isolation of the two signals.

[0050] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A waveguide conversion device, characterized in that: The invention comprises a waveguide component, a circuit board and a reflector, wherein the waveguide component is provided with a waveguide hole, the circuit board is provided with a clearance zone, and the reflector comprises a reflective body; the waveguide hole, the clearance zone and the reflective body are provided correspondingly and sequentially; A probe is provided in the air-avoidance area. The probe is axially symmetrical, and the probe and the circuit board are integrally formed.

2. The waveguide conversion device according to claim 1, wherein The axisymmetric shape is an ellipse.

3. The waveguide conversion device according to claim 1, wherein The reflective body includes a reflective bottom plate arranged corresponding to the air avoidance zone, and the distance between the reflective bottom plate and the probe is a preset distance, and the preset distance is 1 / 5-1 / 3λ.

4. The waveguide conversion device according to claim 3, wherein: The sizes and shapes of the waveguide hole, the air-avoidance area and the reflective bottom plate are adapted to each other.

5. The waveguide conversion device according to claim 3, wherein: The reflective body further includes reflective side plates, which are arranged along the circumference of the reflective bottom plate. The reflective bottom plate is fixedly connected to the circuit board through the reflective side plates.

6. The waveguide conversion device according to claim 5, wherein: The shape of the reflective body is a truncated cone; The angle between the axis of the reflective side plate and the reflective body is a preset angle, and the preset angle is 5°-20°.

7. The waveguide conversion device according to claim 5, wherein: The reflective member further includes a connecting plate, which is arranged on the outer side of the reflective side plate. The reflective side plate is fixedly connected to the circuit board via the connecting plate.

8. The waveguide conversion device according to claim 1, wherein: The probe is made of a conductive material; The circuit board is provided with a grounded coplanar waveguide connected to the probe; The reflector is provided with a notch, and the notch is arranged corresponding to the grounded coplanar waveguide, so as to separate the reflector and the grounded coplanar waveguide.

9. The waveguide conversion device according to claim 1, wherein: The cross-sectional shape of the air avoidance zone is circular; The probe includes a first probe and a second probe, wherein axes of the first probe and the second probe overlap with the radius of the air avoidance zone, and the axes of the first probe and the second probe are perpendicular to each other.

10. The waveguide conversion device according to claim 9, wherein: A support frame is provided in the air avoidance area, and the first probe and the second probe are respectively provided on the support frame.

Images