An ultra-wideband coaxial coupler

Abstract

The present invention discloses an ultra-wideband coaxial coupler, comprising a main line housing and a coupling housing connected vertically, the main line housing is connected to the coupling housing, a main line center pin is arranged in the main line housing, a coupling center pin is arranged in the coupling housing, the middle of the main line center pin is coupled with the tail of the coupling center pin, a protrusion corresponding to the tail of the coupling center pin is arranged in the main line housing, and the protrusion and the coupling center pin form a bypass coupling capacitor. By adding a bypass coupling capacitor at the coupling point of the main line center pin and the coupling center pin, and utilizing the reverse coupling slope characteristics of the main line center pin / coupling center pin / main line center pin, the flatness of the coupler is greatly increased, and the bandwidth of the coupler is widened to 120% on the basis of the bandwidth of the traditional coupler of about 30%, so as to meet the system's increasingly higher use requirements for the coupler bandwidth under the current situation and reduce the design cost of the coupler.

Description

Technical Field

[0001] The present invention relates to the technical field of microwave communications, and in particular to an ultra-wideband coaxial coupler. Background Art

[0002] With the development of 5G communication technology, the bandwidth that microwave devices need to process is getting larger and larger, even exceeding the theoretical upper limit of microwave device design. Existing traditional couplers usually have a large coupling slope, a coupling bandwidth not exceeding 30%, and poor coupling flatness. The method of designing couplers of different specifications is usually adopted to meet the coupling requirements of different systems, resulting in great limitations in the design, poor versatility, and rising costs. Therefore, an ultra-wideband coaxial coupler is needed to meet the market's usage needs. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an ultra-wideband coaxial coupler that meets the ultra-wideband working requirements.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: an ultra-wideband coaxial coupler, comprising a main line housing and a coupling housing connected vertically, the main line housing is communicated with the coupling housing, a main line center needle is provided in the main line housing, a coupling center needle is provided in the coupling housing, the middle part of the main line center needle is coupled with the tail part of the coupling center needle, a protrusion corresponding to the tail part of the coupling center needle is provided in the main line housing, and the protrusion and the coupling center needle form a bypass coupling capacitor.

[0005] The beneficial effects of the present invention are as follows: by adding a bypass coupling capacitor at the coupling point between the main line center pin and the coupling center pin, and utilizing the reverse coupling slope characteristics of the main line center pin / coupling center pin / main line center pin, the flatness of the coupler is greatly increased, and the bandwidth of the coupler is widened to 120% based on the bandwidth of the traditional coupler of about 30%, so as to meet the system's increasingly higher demand for the coupler bandwidth under the current situation and reduce the design cost of the coupler. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 A partial cross-sectional view of an ultra-wideband coaxial coupler according to Embodiment 1 of the present invention;

[0007] Figure 2 for Figure 1 Schematic diagram at A in the middle;

[0008] Figure 3 for Figure 1 Schematic diagram at B in the middle;

[0009] Figure 4 Schematic diagram of the structure of the coupling center pin in the ultra-wideband coaxial coupler according to the first embodiment of the present invention;

[0010] Figure 5 This is a circuit schematic diagram of an ultra-wideband coaxial coupler according to Embodiment 1 of the present invention.

[0011] Description of labels:

[0012] 1. Main line housing; 11. Main line center needle; 12. Protrusion; 13. Insulating medium; 14. First insulator; 141. Air tightness test hole; 15. Second insulator; 151. Inner sealing ring; 152. Outer sealing ring; 16. Mounting table; 17. Mounting hole; 2. Coupling housing; 21. Coupling center needle; 211. Adjustment thread; 22. Internal thread; 3. Bypass coupling capacitor. DETAILED DESCRIPTION

[0013] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0014] The most critical concept of the present invention is to add a bypass coupling capacitor at the coupling point between the main line center pin and the coupling center pin.

[0015] Please refer to Figures 1 to 5 , an ultra-wideband coaxial coupler, comprising a main line housing 1 and a coupling housing 2 connected vertically, the main line housing 1 is communicated with the coupling housing 2, a main line center needle 11 is arranged in the main line housing 1, a coupling center needle 21 is arranged in the coupling housing 2, the middle part of the main line center needle 11 is coupled with the tail part of the coupling center needle 21, a protrusion 12 corresponding to the tail part of the coupling center needle 21 is arranged in the main line housing 1, and the protrusion 12 and the coupling center needle 21 form a bypass coupling capacitor 3.

[0016] The structural principle of the present invention is briefly described as follows: by adding a bypass coupling capacitor 3 at the coupling point between the main line center needle 11 and the coupling center needle 21, and utilizing the reverse coupling slope characteristics of the main line center needle 11 / coupling center needle 21 / main line center needle 11, the flatness of the coupler is greatly increased.

[0017] From the above description, it can be seen that the beneficial effect of the present invention is that the bandwidth of the coupler is widened to 120% based on the bandwidth of the traditional coupler of about 30%, so as to meet the system's increasingly higher demand for coupler bandwidth under the current situation and reduce the design cost of the coupler.

[0018] Furthermore, an insulating medium 13 is provided between the protruding portion 12 and the coupling center needle 21 .

[0019] It can be seen from the above description that the insulating medium 13 is disposed between the protruding portion and the coupling center pin 21 to improve the comprehensive performance of the bypass coupling capacitor 3 .

[0020] Furthermore, the head of the main line center needle 11 is located in the main line housing 1 , and the tail of the main line center needle 11 extends out of the main line housing 1 .

[0021] Furthermore, the main line housing 1 is provided with a first insulator 14 and a second insulator 15 for supporting the main line center needle 11, the first insulator 14 is located in the middle of the main line center needle 11, the second insulator 15 is located at the tail of the main line center needle 11, and the coupling center needle 21 is located between the first insulator 14 and the second insulator 15.

[0022] As can be seen from the above description, the first insulator 14 and the second insulator 15 are provided to support the main line center needle 11 and seal the interior of the ultra-wideband coaxial coupler, so as to accommodate the coupling point between the main line center needle 11 and the coupling center needle 21.

[0023] Furthermore, the first insulator 14 is provided with a through airtightness test hole 141 .

[0024] It can be seen from the above description that the airtightness test hole 141 can be used to conveniently test whether the ultra-wideband coaxial coupler is sealed, thereby facilitating the detection of the waterproof performance of the ultra-wideband coaxial coupler.

[0025] Furthermore, at least one set of sealing rings is provided on the second insulator 15, and the sealing rings include an inner sealing ring 151 and an outer sealing ring 152, wherein the inner sealing ring 151 is located between the second insulator 15 and the main line center needle 11, and the outer sealing ring 152 is located between the second insulator 15 and the main line housing 1.

[0026] It can be seen from the above description that the double sealing ring design of the inner sealing ring 151 and the outer sealing ring 152 ensures the waterproof capability of the ultra-wideband coaxial coupler, preventing water vapor or dust from entering the interior of the ultra-wideband coaxial coupler and affecting its performance.

[0027] Furthermore, the number of the sealing rings is two groups.

[0028] It can be seen from the above description that providing two sets of sealing rings further improves the waterproof performance of the ultra-wideband coaxial coupler.

[0029] Furthermore, a protruding adjusting thread 211 is provided in the middle of the coupling center pin 21 , and an internal thread 22 matching with the adjusting thread 211 is provided in the coupling housing 2 .

[0030] It can be seen from the above description that by adjusting the position of the coupling center needle 21 by adjusting the thread 211 , the coupling degree between the coupling center needle 21 and the main line center needle 11 can be conveniently adjusted.

[0031] Furthermore, a protruding mounting platform 16 is provided at the rear of the main line housing 1 , and a plurality of mounting holes 17 are provided on the mounting platform 16 .

[0032] It can be seen from the above description that the installation platform 16 is provided to facilitate installation of the ultra-wideband coaxial coupler on the working surface, so that the ultra-wideband coaxial coupler is tightly connected to the working surface and is not easy to fall off.

[0033] Furthermore, the coupling housing 2 is screwed to the main line housing 1 .

[0034] It can be seen from the above description that the coupling housing 2 is connected to the main line housing 1 through threads, which is easy to install and disassemble and the operation is simple and convenient.

[0035] Embodiment 1

[0036] Please refer to Figures 1 to 5, Embodiment 1 of the present invention is: an ultra-wideband coaxial coupler, comprising a main line housing 1 and a coupling housing 2 connected vertically, the main line housing 1 being in communication with the coupling housing 2, a main line center pin 11 being provided in the main line housing 1, a coupling center pin 21 being provided in the coupling housing 2, the middle of the main line center pin 11 being coupled with the tail of the coupling center pin 21. The head of the main line center pin 11 is provided with a concave socket, the concave socket is provided with a plurality of equally divided grooves, the tail of the main line center pin 11 is provided with a columnar plug, the head of the main line center pin 11 is located in the main line housing 1, the tail of the main line center pin 11 extends out of the main line housing 1, a first insulator 14 and a second insulator 15 for supporting the main line center pin 11 are provided in the main line housing 1, the first insulator 14 is located in the middle of the main line center pin 11, the second insulator 15 is located at the tail of the main line center pin 11, the The coupling point between the main line center pin 11 and the coupling center pin 21 is located between the first insulator 14 and the second insulator 15. The first insulator 14 and the second insulator 15 seal the two ends of the main line housing 1 and contain the coupling point between the main line center pin 11 and the coupling center pin 21 to prevent water vapor or dust from entering the main line housing 1. Preferably, the first insulator 14 is provided with an airtightness test hole 141 to facilitate testing the airtightness inside the main line housing 1 and ensure the waterproof performance of the ultra-wideband coaxial coupler. A first thread is provided on the outer surface of the coupling housing 2, and a connecting hole for installing the coupling housing 2 is provided on the main line housing 1. A second thread matching the first thread is provided in the connecting hole, and the coupling housing 2 is connected to the main line housing 1 through the matching of the first thread and the second thread. A third thread for connecting an external device is provided on the outer surface of the head of the main line housing 1, and a protruding square mounting platform 16 is provided at the tail of the main line housing 1. Mounting holes 17 are respectively provided at the four corners of the mounting platform 16, which facilitate the installation of the ultra-wideband coaxial coupler on the working surface and ensure that the ultra-wideband coaxial coupler is firmly connected to the working surface and is not easy to fall off.

[0037] like Figure 2 and Figure 5As shown, a protrusion 12 corresponding to the tail of the coupling center needle 21 is provided in the main line housing 1, and the protrusion 12 and the coupling center needle 21 form a bypass coupling capacitor 3. The coupling slope inverse characteristics of the main line center needle 11 / coupling center needle 21 / main line center needle 11 are used to greatly increase the flatness of the coupler, and the bandwidth of the coupler is widened to 120% based on the bandwidth of the traditional coupler of about 30%, meeting the current and future system requirements for ultra-wideband couplers, while saving the cost of designing couplers corresponding to different systems. Preferably, an insulating medium 13 is provided between the protrusion 12 and the coupling center needle 21 to improve the comprehensive performance of the bypass coupling capacitor 3 and prevent the bypass coupling capacitor 3 from being broken down and causing damage to the ultra-wideband coaxial coupler.

[0038] Please refer to Figure 1 and Figure 4 The middle part of the coupling center needle 21 is provided with an adjustment thread 211, and the interior of the coupling housing 2 is provided with a third insulator for supporting the coupling center needle 21. The third insulator is provided with an internal thread 22 that matches the adjustment thread 211. The coupling center needle 21 can be rotated to move it up and down to adjust the coupling degree between the coupling center needle 21 and the main line center needle 11. The adjustment is convenient and quick, and the ultra-wideband coaxial coupler does not need to be completely disassembled, and the operation is simple. Preferably, a gasket for waterproofing is provided between the third insulator and the coupling center needle 21.

[0039] like Figure 3 As shown, at least one group of sealing rings is provided on the second insulator 15, and the sealing rings include an inner sealing ring 151 and an outer sealing ring 152. The inner sealing ring 151 is arranged between the main line center needle 11 and the first insulator 14, and the main line center needle 11 is provided with a first groove matching with the inner sealing ring 151, and the outer sealing ring 152 is arranged between the second insulator 15 and the main line housing 1, and the second insulator 15 is provided with a second groove matching with the outer sealing ring 152. The double sealing ring design of the inner sealing ring 151 and the outer sealing ring 152 greatly improves the waterproof performance of the ultra-wideband coaxial coupler. Preferably, the number of the sealing rings is two groups, and the two groups of sealing rings are arranged on the second insulator 15 at intervals, which further improves the waterproof ability of the ultra-wideband coaxial coupler and enables the ultra-wideband coaxial coupler to be used in harsh environments.

[0040] To sum up, the ultra-wideband coaxial coupler provided by the present invention greatly broadens the bandwidth compared with the traditional coupler, meets the system's requirements for the use of ultra-wideband couplers, reduces the design cost, can conveniently adjust the coupling degree, and the adjustment operation is simple and quick. The ultra-wideband coaxial coupler of this scheme has good waterproof performance and can be used in harsh environments.

[0041] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An ultra-wideband coaxial coupler, comprising a main line housing and a coupling housing connected vertically, the main line housing is communicated with the coupling housing, a main line center needle is arranged in the main line housing, a coupling center needle is arranged in the coupling housing, the middle part of the main line center needle is coupled with the tail part of the coupling center needle, characterized in that: A protrusion corresponding to the tail of the coupling center needle is provided in the main line housing, and the protrusion and the coupling center needle form a bypass coupling capacitor; a protruding adjustment thread is provided in the middle of the coupling center needle, and an internal thread matching the adjustment thread is provided in the coupling housing; an insulating medium is provided between the protrusion and the coupling center needle.

2. The ultra-wideband coaxial coupler according to claim 1, characterized in that: The head of the main line center needle is located in the main line housing, and the tail of the main line center needle extends out of the main line housing.

3. The ultra-wideband coaxial coupler according to claim 1, characterized in that: The main line housing is provided with a first insulator and a second insulator for supporting the main line center needle. The first insulator is located in the middle of the main line center needle, the second insulator is located at the tail of the main line center needle, and the coupling center needle is located between the first insulator and the second insulator.

4. The ultra-wideband coaxial coupler according to claim 3, characterized in that: The first insulator is provided with a through airtightness test hole.

5. The ultra-wideband coaxial coupler according to claim 3, characterized in that: At least one set of sealing rings is provided on the second insulator, and the sealing rings include an inner sealing ring and an outer sealing ring. The inner sealing ring is located between the second insulator and the main line center needle, and the outer sealing ring is located between the second insulator and the main line housing.

6. The ultra-wideband coaxial coupler according to claim 5, characterized in that: The number of the sealing rings is two groups.

7. The ultra-wideband coaxial coupler according to claim 1, characterized in that: A protruding mounting platform is provided at the tail of the main line housing, and a plurality of mounting holes are provided on the mounting platform.

8. The ultra-wideband coaxial coupler according to claim 1, characterized in that: The coupling housing is threadedly connected to the main line housing.

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