A planar millimeter-wave blackbody radiation source device

Abstract

The present invention provides a planar millimeter wave black body radiation source device, which has a high emissivity in the millimeter wave / terahertz band and can be used as a standard radiation source for calibrating millimeter wave / terahertz detection equipment. The device comprises: a heating device layer, a first heating heat-conducting layer, a second heat-conducting layer, a polytetrafluoroethylene sheet, a packaging frame, and a temperature control system; one end face of the packaging frame is open, the packaging frame comprises a bottom plate and a peripheral plate, the heating device layer is stacked on the inner wall of the bottom plate, the heating surface of the first heating heat-conducting layer is attached to the heating layer surface of the heating device layer, the first heating heat-conducting layer is specifically a metal plate, and a plurality of protruding cone structures are arranged on the heat-conducting surface of the metal plate away from the bottom plate, and the second heat-conducting layer is arranged in the shape of the heat-conducting surface of the metal plate and is provided with a plurality of protruding second cone structures.

Description

Technical Field

[0001] The invention relates to the technical field of millimeter wave detection, and in particular to a planar millimeter wave blackbody radiation source device. Background Art

[0002] As a standard source, blackbody radiation source is mainly used for the calibration of radiation detection equipment. Existing blackbody radiation sources are divided into two types: cavity blackbody radiation source and surface source blackbody radiation source.

[0003] The key to the cavity blackbody radiation source structure lies in the design of the isothermal cavity. The heating device heats the blackbody cavity to obtain a uniform temperature field on its inner wall, and the blackbody radiation material on the inner wall of the cavity radiates electromagnetic waves outward. Its disadvantage is that it cannot be made into a large-caliber blackbody radiation source;

[0004] The schematic diagram of the surface blackbody radiation source is as follows: Figure 1 As shown, it includes a blackbody radiation material layer 1, a heating device 2, a temperature sensor 3, and a temperature control system 4. The existing blackbody radiation source is used for equipment calibration in the infrared band (wavelength less than 1 mm). In the millimeter wave / terahertz band, the emissivity of the blackbody radiation source is low and cannot be used as a standard radiation source for millimeter waves / terahertz. The reason is that the surface of the existing surface source blackbody radiation source structure is easily affected by the environment, the heat energy is lost too quickly, and the heating concentration is not enough, so it is urgent to develop a structure that can be used as a planar millimeter wave blackbody radiation source. Summary of the invention

[0005] In view of the above problems, the present invention provides a planar millimeter-wave blackbody radiation source device, which has a high emissivity in the millimeter-wave / terahertz band and can be used as a standard radiation source for calibrating millimeter-wave / terahertz detection equipment.

[0006] A planar millimeter-wave blackbody radiation source device, characterized in that it comprises:

[0007] Heating device layer;

[0008] a first heating heat conducting layer;

[0009] A second heat conducting layer;

[0010] Polytetrafluoroethylene sheet;

[0011] Encapsulation framework;

[0012] Temperature control system;

[0013] One end face of the packaging frame is open, and the packaging frame includes a bottom plate and an outer plate. The heating device layer is stacked on the inner wall of the bottom plate. The heating surface of the first heating heat-conducting layer is in contact with the heating layer surface of the heating device layer. The first heating heat-conducting layer is specifically a metal plate. A plurality of protruding cone structures are arranged on the heat-conducting surface of the metal plate facing away from the bottom plate. The second heat-conducting layer is arranged in the shape of the heat-conducting surface of the metal plate and is provided with a plurality of protruding second cone structures. The polytetrafluoroethylene plate is covered on the outer surface of the second heat-conducting layer. Both surfaces of the polytetrafluoroethylene plate are planar structures. The polytetrafluoroethylene plate is covered on the open surface of the packaging frame. The outer plate seals and connects the polytetrafluoroethylene plate, the second heat-conducting layer, the first heating heat-conducting layer, and the heating device layer in the thickness direction. The heating device layer is provided with a connecting wire at a position corresponding to the bottom plate to connect to an external temperature control system.

[0014] It is further characterized by:

[0015] A temperature sensor is provided in the heating device layer, and a temperature measuring end of the temperature sensor is connected to the first heating heat-conducting layer to ensure real-time monitoring of the temperature. The temperature sensor is connected to an external temperature control system through a wire;

[0016] The second heat-conducting layer is specifically a heat-conducting silicone layer, and the outer surface of the heat-conducting silicone layer is also coated with a silicon carbide coating to ensure sufficient, stable and reliable heat conduction;

[0017] The first heating heat-conducting layer is specifically a copper layer, the outer surface of the copper layer is a heat-conducting surface, and the heat-conducting surface of the copper layer is arranged with protruding cone structures;

[0018] The cone structure is a cone or a pyramid.

[0019] After adopting the structure of the present invention, the surface of the blackbody radiation source is covered with a layer of polytetrafluoroethylene sheet, which has the function of heat preservation and reduces the impact of the environment on the blackbody radiation source. The heating device heats the first heating heat-conducting layer and controls its temperature through the temperature control system. The heat-conducting surface of the first heating heat-conducting layer is covered with cone structures, thereby increasing its heat-conducting surface area. The heat-conducting surface of the first heating heat-conducting layer is covered with a second heat-conducting layer to ensure that the heat conduction is sufficient, stable and reliable; it has a high emissivity in the millimeter wave / terahertz band and can be used as a standard radiation source for calibrating millimeter wave / terahertz detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of an existing surface source blackbody radiation source;

[0021] Figure 2 It is a vertical sectional perspective schematic diagram of the present invention;

[0022] Figure 3 This is the assembly front view of the present invention after removing the packaging frame;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the first heating and heat-conducting layer of the present invention;

[0024] The names corresponding to the serial numbers in the figure are as follows:

[0025] Polytetrafluoroethylene sheet 10, silicon carbide coating 20, second heat-conducting layer 30, second cone structure 31, first heating heat-conducting layer 40, cone structure 41, heating device layer 50, temperature control system 60, packaging frame 70, bottom plate 71, outer plate 72, wire 80. DETAILED DESCRIPTION

[0026] A planar millimeter-wave blackbody radiation source device, see Figure Figure 2-Figure 4 , which includes a heating device layer 50, a first heating heat-conducting layer 40, a second heat-conducting layer 30, a polytetrafluoroethylene sheet 10, a packaging frame 70, and a temperature control system 60;

[0027] One end face of the packaging frame 70 is open, and the packaging frame includes a bottom plate 71 and an outer plate 72. The heating device layer 50 is stacked on the inner wall of the bottom plate 71. The heating surface of the first heating heat-conducting layer 40 is in contact with the heating layer surface of the heating device layer 50. The first heating heat-conducting layer 40 is specifically a metal plate. A plurality of protruding cone structures 41 are arranged on the heat-conducting surface of the metal plate facing away from the bottom plate. The second heat-conducting layer 30 is arranged in the shape of the heat-conducting surface of the metal plate and is provided with a plurality of protruding second cone structures 31. The polytetrafluoroethylene plate 10 is covered on the outer surface of the second heat-conducting layer 30. Both surfaces of the polytetrafluoroethylene plate 10 are planar structures. The polytetrafluoroethylene plate 10 is covered on the open surface of the packaging frame 70. The outer plate 72 encapsulates and connects the polytetrafluoroethylene plate 10, the second heat-conducting layer 30, the first heating heat-conducting layer 40, and the heating device layer 50 in the thickness direction. A connecting wire 80 is provided at the position of the heating device layer 50 corresponding to the bottom plate 70 to connect to the external temperature control system 60.

[0028] When implementing:

[0029] A temperature sensor (not shown in the figure, belonging to an existing mature temperature control structure) is arranged in the heating device layer, and the temperature measuring end of the temperature sensor is connected to the first heating heat-conducting layer 40 to ensure real-time monitoring of the temperature. The temperature sensor is connected to an external temperature control system 60 through a wire;

[0030] The second heat-conducting layer 30 is specifically a heat-conducting silicone layer, and the outer surface of the heat-conducting silicone layer is also coated with a silicon carbide coating 20 to ensure sufficient heat conduction and stable and reliable performance;

[0031] The first heating heat-conducting layer 40 is specifically a copper layer, the outer surface of the copper layer is a heat-conducting surface, and the heat-conducting surface of the copper layer is arranged with protruding cone structures 41;

[0032] The cone structure 41 is a cone or a pyramid.

[0033] In a specific embodiment, the overall shape of the copper layer when viewed from above is a rectangle, and a plurality of pyramidal structures 41 arranged in a rectangular array are arranged on the heat-conducting surface of the copper layer, with intervals being left between adjacent pyramidal structures in the horizontal and vertical directions.

[0034] Its working principle is as follows: the surface of the blackbody radiation source is covered with a layer of polytetrafluoroethylene sheet, whose function is to keep warm and reduce the impact of the environment on the blackbody radiation source; the heating device heats the first heating heat-conducting layer and controls its temperature through a temperature control system; the heat-conducting surface of the first heating heat-conducting layer is covered with cone structures, thereby increasing its heat-conducting surface area; the heat-conducting surface of the first heating heat-conducting layer is covered with a second heat-conducting layer to ensure that the heat conduction is sufficient, stable and reliable; it has a high emissivity in the millimeter wave / terahertz band and can be used as a standard radiation source for calibrating millimeter wave / terahertz detection equipment.

[0035] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0036] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A planar millimeter-wave blackbody radiation source device, characterized in that: It includes: Heating device layer; a first heating heat conducting layer; A second heat conducting layer; Polytetrafluoroethylene sheet; Encapsulation framework; Temperature control system; One end face of the packaging frame is open, the packaging frame comprises a bottom plate and an outer plate, the heating device layer is stacked on the inner wall of the bottom plate, the heating surface of the first heating heat-conducting layer is in contact with the heating layer surface of the heating device layer, the first heating heat-conducting layer is specifically a metal plate, a plurality of protruding cone structures are arranged on the heat-conducting surface of the metal plate away from the bottom plate, the second heat-conducting layer is arranged in the shape of the heat-conducting surface of the metal plate and is provided with a plurality of protruding second cone structures, the polytetrafluoroethylene plate cover is installed on the outer surface of the second heat-conducting layer, both surfaces of the polytetrafluoroethylene plate are planar structures, the polytetrafluoroethylene plate cover is installed on the open face of the packaging frame, the outer plate seals and connects the polytetrafluoroethylene plate, the second heat-conducting layer, the first heating heat-conducting layer and the heating device layer in the thickness direction, and a connecting wire is provided at a position of the heating device layer corresponding to the bottom plate to connect to an external temperature control system; A temperature sensor is arranged in the heating device layer, a temperature measuring end of the temperature sensor is connected to the first heating heat-conducting layer, and the temperature sensor is connected to an external temperature control system through a wire; The first heating heat-conducting layer is specifically a copper layer, the outer surface of the copper layer is a heat-conducting surface, and the heat-conducting surface of the copper layer is arranged with protruding cone structures.

2. A planar millimeter-wave blackbody radiation source device as claimed in claim 1, characterized in that: The second heat-conducting layer is specifically a heat-conducting silicone layer, and the outer surface of the heat-conducting silicone layer is also coated with a silicon carbide coating.

3. A planar millimeter-wave blackbody radiation source device as claimed in claim 1, characterized in that: The cone structure is a cone or a pyramid.

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