W-waveband waveguide sealing window

Abstract

The utility model relates to a W-waveband waveguide sealing window, which comprises an upper cavity, a lower cavity and a dielectric sheet, the lower cavity internally comprises a first standard waveguide, a first switching waveguide and a dielectric sheet mounting groove which are formed by machining, and the dielectric sheet is mounted in the dielectric sheet mounting groove; the upper cavity internally comprises a second switching waveguide and a second standard waveguide which are formed through machining, the first standard waveguide and the first switching waveguide are directly connected and transited below the dielectric sheet mounting groove, and the second switching waveguide and the second standard waveguide are directly connected and transited above the dielectric sheet mounting groove. The waveguide can be sealed, so that external pollutants or water vapor and the like are isolated, and the waveguide sealing device has the main characteristics of simple and compact structure, small size, easiness in implementation, low loss and wider bandwidth.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of radio frequency microwave technology especially relates to a W wave band waveguide sealing window. BACKGROUND

[0002] Metal waveguide is widely used in the field of radio communication, instrument and electronic countermeasure because of its small power consumption, large power capacity and easy processing; especially in W wave band, the metal waveguide is widely used because of its small loss.

[0003] But the metal waveguide has the shortcoming of being unable to seal, and the external dust, water vapor and condensed water etc. entering the module interior can oxidize, pollute, corrode the chip or circuit, even cause the circuit short circuit or burn out. Therefore, how to seal the waveguide is currently considered. SUMMARY

[0004] The utility model discloses a W wave band waveguide sealing window, which overcomes the shortcomings of the prior art and solves the problems existing in the prior art.

[0005] The utility model discloses a W wave band waveguide sealing window, which overcomes the shortcomings of the prior art and solves the problems existing in the prior art.

[0006] The upper cavity and the lower cavity are sintered together by soldering tin, and the waveguide sealing window is sealed by the dielectric sheet sintered in the dielectric sheet mounting groove.

[0007] A layer of weldable metal layer is formed on the outer circle of the dielectric sheet by physical vapor deposition, and the dielectric sheet is sintered to the weldable metal layer during assembly, and then the upper cavity and the lower cavity are welded together by soldering tin, and the structural size of the matched first adapter waveguide and second adapter waveguide is adjusted according to the dielectric constant and size of the dielectric sheet.

[0008] The utility model has the advantages that the W wave band waveguide sealing window can seal the waveguide, thereby isolating external pollutants or water vapor etc., and the main features of the utility model are simple and compact structure, small size, easy implementation, low loss and wide bandwidth. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 The structure of the utility model is shown in the figure;

[0010] Figure 2 schematic diagram of the medium sheet;

[0011] In the figure: 1 - upper cavity, 2 - lower cavity, 3 - medium sheet, 4 - first standard waveguide, 5 - first adapter waveguide, 6 - medium sheet mounting groove, 7 - second adapter waveguide, 8 - second standard waveguide, 9 - solderable metal layer. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in conjunction with the drawings is not intended to limit the protection scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. The present utility model will be further described below in conjunction with the drawings.

[0013] As Figure 1 shown, the utility model relates to a W wave band waveguide sealing window, which is composed of an upper cavity 1, a lower cavity 2 and a medium sheet 3. The lower cavity 2 includes a first standard waveguide 4, a second adapter waveguide 5 and a medium sheet mounting groove 6 which are machined and formed, and the upper cavity 1 includes a second adapter waveguide 7 and a second standard waveguide 8 which are machined and formed. The first adapter waveguide 5 and the first standard waveguide 4 are directly connected and transitioned, and similarly, the second adapter waveguide 7 and the second standard waveguide 8 are directly connected and transitioned, which greatly increases the overall structural compactness of the waveguide sealing window.

[0014] The waveguide sealing window is mainly sealed by the medium sheet 3 sintered in the medium sheet mounting groove 6 of the lower cavity 2, including but not limited to rigid sealing materials such as ceramic, quartz and sapphire. The upper cavity 1 and the lower cavity 2 are also sintered together by soldering tin, thereby realizing the overall sealing. The first adapter waveguide 5 is mainly used for matching between the medium sheet 3 and the first standard waveguide 4, and the second adapter waveguide 7 is mainly used for matching between the medium sheet and the second standard waveguide 8.

[0015] Further, the second adapter waveguide 7 can be located on the medium sheet mounting groove 6 where the medium sheet 3 is mounted, or on the second standard waveguide 8.

[0016] As Figure 2As shown, the outer ring of the guide sealing window dielectric sheet has a layer of weldable metal layer 8, which is formed by physical vapor deposition such as magnetron sputtering to sputter metal such as nickel, titanium-tungsten alloy onto the dielectric sheet 3 to form a seed layer, and then deposit a gold layer onto the seed layer by electroplating or chemical gold deposition. In this way, the dielectric sheet 3 has weldability. During assembly, the dielectric sheet 3 is eutectic sintered to the weldable metal layer 8, and then the upper and lower cavity bodies are soldered together using solder. The structure size of the adapter waveguide used for matching can be flexibly adjusted according to the dielectric constant and size of the dielectric sheet.

[0017] The sintering solder of the dielectric sheet 3 of the utility model is selected to be gold-tin alloy solder, the upper cavity 1 and the lower cavity 2 are selected to be metal materials with low expansion coefficient, and the dielectric sheet uses a quartz sheet. The loss thereof is only 0.05 dB, and the introduced insertion loss is very small for the frequency, and the relative bandwidth can reach more than 30% when the return loss is below-20 dB, and if optimized and adjusted, the relative bandwidth can even reach the full frequency band of the w wave band, which not only ensures the reliability of the system, but also ensures that the performance deterioration of the system is small enough, and the structure is simple, compact, small in size, easy to install and excellent in performance.

[0018] The above is only the preferred embodiment of the utility model, and it should be understood that the utility model is not limited to the form disclosed herein, and should not be considered as excluding other embodiments, but can be used for various other combinations, modifications and improvements, and can be modified within the scope of the concept described herein by the above teaching or related technical or knowledge. The modification and change made by the person skilled in the art without departing from the spirit and scope of the utility model should be within the protection scope of the claims attached to the utility model.

Claims

1. A W-band waveguide seal window, characterized by: It includes by the upper cavity (1), the lower cavity (2) and the dielectric sheet (3) are constituted;The lower cavity (2) includes the first standard waveguide (4) that is formed by mechanical processing, first adapter waveguide (5) and dielectric sheet installation groove (6), the dielectric sheet (3) is installed in dielectric sheet installation groove (6);The upper cavity (1) includes the second adapter waveguide (7) and second standard waveguide (8) that are formed by mechanical processing, the first standard waveguide (4) and first adapter waveguide (5) are directly connected transition in the lower of dielectric sheet installation groove (6), the second adapter waveguide (7) and second standard waveguide (8) are directly connected transition in the upper of dielectric sheet installation groove (6).

2. A W-band waveguide sealing window according to claim 1, characterized in that: The upper cavity (1) and the lower cavity (2) are sintered together with solder, and the waveguide sealing window is sealed by the dielectric sheet (3) sintered in the dielectric sheet installation groove (6).

3. The W-band waveguide window of claim 1, wherein: A layer of weldable metal layer (9) is formed on the outer ring of the dielectric sheet (3) by physical vapor deposition, and the dielectric sheet (3) is sintered to the weldable metal layer (9) during assembly, and then the upper cavity (1) and the lower cavity (2) are welded together using solder, and the structural size of the first adapter waveguide (5) and the second adapter waveguide (7) is adjusted according to the dielectric constant and size of the dielectric sheet (3).

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