Thin film band-pass filter based on LTCC substrate

Abstract

The utility model discloses a film band-pass filter based on an LTCC substrate, which comprises a base, the upper surface of the base is fixedly connected with a placing frame, the inner cavity of the placing frame is movably connected with a band-pass filtering device, the bottom surface of the inner cavity of the placing frame is provided with a heat dissipation mechanism in a penetrating manner, the heat dissipation mechanism comprises a limiting box, and the limiting box is fixedly connected with the placing frame. The limiting box penetrates through the bottom surface of an inner cavity of the placement frame, an exhaust fan is movably connected to the inner cavity of the limiting box, an exhaust outlet of the exhaust fan faces downwards, the placement frame is arranged, so that the band-pass filtering device can be placed, and the heat dissipation mechanism is arranged, so that the heat dissipation of the band-pass filtering device can be realized during working; and vibration generated by rotation of the fan can be prevented from influencing normal work of the band-pass filtering device. The thin film band-pass filter based on the LTCC substrate has the effect of preventing hot air generated after long-time work from influencing work.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film band pass filter technical field especially, it relates to a kind of thin film band pass filter based on LTCC substrate. BACKGROUND

[0002] Thin film band pass filter is the key component in modern electronic communication and signal processing field.It is based on advanced thin film deposition technology construction, usually by the thin film material of different refractive index alternately stacked.Meanwhile, using thin film interference principle, when light or electromagnetic wave is incident, the signal of specific wavelength is reflected and refracted between thin film layers, and the light path difference meets specific condition and produces constructive interference to pass through, other wavelengths are inhibited by destructive interference, so as to accurately screen the required frequency range.

[0003] As the utility model discloses a kind of thin film band pass filter based on LTCC substrate, including thin film band pass filter and LTCC low pass filter;LTCC low pass filter adopts LTCC technology to form low pass filter circuit, thin film band pass filter is realized on the top layer of LTCC low pass filter dielectric body using thin film sputtering process, the method used is to polish the top of LTCC substrate, surface sputtering and etching, form thin film circuit;Thin film band pass filter has input port and output port, LTCC low pass filter is electrically connected between the resonant unit and output port of thin film band pass filter;Without increasing the overall paving area of filter, the phenomenon of two times frequency parasitic passband of half-wavelength resonator band pass filter can be effectively improved;Thin film process is used on LTCC substrate, solve the problem of insufficient precision of traditional LTCC technology compared with thin film technology, realize higher frequency band pass filter;While again can introduce the multilayer layout circuit of LTCC itself, realize the advantage of miniaturization.

[0004] Similar to the above application, the following problems still exist:

[0005] The heat generated after long time work can affect work. UTILITY MODEL CONTENT

[0006] The utility model discloses a kind of thin film band pass filter based on LTCC substrate, to solve the technical problem that the heat generated after long time work can affect work.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0008] The utility model provides a kind of LTCC substrate-based thin film band-pass filter, including base, the upper surface of the base is fixedly connected with placing frame, band-pass filter device is movably connected in the cavity of the placing frame, the bottom surface of the cavity of the placing frame is penetrated by heat dissipation mechanism, the heat dissipation mechanism includes limiting box, the bottom surface of the cavity of placing frame is penetrated by the limiting box, the inner cavity of the limiting box is movably connected with exhaust fan, and the air outlet of the exhaust fan faces downward.

[0009] By setting placing frame, band-pass filter device can be placed, by setting heat dissipation mechanism, band-pass filter device can be cooled during work, and vibration generated by fan rotation can be prevented from affecting normal work of band-pass filter device, so as to improve data accuracy, by setting exhaust fan, hot air generated by band-pass filter device during work can be carried away after power is connected and switch is opened.

[0010] In a preferred scheme, the outer side of the band-pass filter device is symmetrically fixedly connected with a clamping plate, the outer surface of the clamping plate is sleeved with a clamping frame, the side away from the band-pass filter device of the clamping plate is fixedly connected with a positioning block, the positioning block is frictionally matched with the groove of the clamping frame, the outer surface of the clamping frame is fixedly connected with a limiting frame, the inner cavity of the limiting frame is rotatably connected with a fixing frame, the outer side of the placing frame is symmetrically fixedly connected with a blocking plate, and the blocking plate is press-fitted with the fixing frame.

[0011] By setting clamping frame, the clamping plate can be limited, so that the band-pass filter device can be connected with the clamping frame, by setting positioning block, the tightness of the connection between the clamping plate and the clamping frame can be increased, by setting limiting frame, the fixing frame can be stably rotated in the inner cavity thereof by cooperating with the fixing frame, and by setting blocking plate, the fixing frame can be tightly connected at the blocking plate by blocking the fixing frame.

[0012] In a preferred scheme, the outer surface of the exhaust fan is fixedly connected with a support plate, the bottom end of the support plate is fixedly connected with a sliding ring, the sliding ring is slidingly connected in the inner cavity of the limiting box, the lower surface of the sliding ring is fixedly connected with a spring, the bottom end of the spring is fixedly connected to the bottom surface of the inner cavity of the limiting box, the number of the spring is several, and the several springs are evenly distributed.

[0013] By setting sliding ring, vertical up-and-down movement effect can be generated in the inner cavity of the limiting box, and by setting spring, the bottom of the sliding ring can be supported, so that the sliding ring can move up and down in the inner cavity of the limiting box.

[0014] As known from the above, compared with prior art, the LTCC substrate-based thin film band-pass filter has the following improvements and advantages.

[0015] One: by setting the placement frame, the band-pass filter device can be placed, by setting the heat dissipation mechanism, the band-pass filter device can be cooled during work, and the vibration generated by the fan rotation can be prevented from affecting the normal work of the band-pass filter device, thereby improving the accuracy of the data, by setting the exhaust fan, the hot air generated by the band-pass filter device after the power is connected and the switch is opened.

[0016] Second: by setting the clamping frame, the clamping plate can be limited, so that the band-pass filter device can be connected with the clamping frame, and by setting the positioning block, the tightness of the connection between the clamping plate and the clamping frame can be increased. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A structure schematic view of a thin film band-pass filter based on an LTCC substrate is provided for the utility model.

[0018] Figure 2 A structure side view of a thin film band-pass filter based on an LTCC substrate is provided for the utility model.

[0019] Figure 3 A partial structure schematic view of a thin film band-pass filter based on an LTCC substrate is provided for the utility model.

[0020] Figure 4 A heat dissipation mechanism schematic view of a thin film band-pass filter based on an LTCC substrate is provided for the utility model.

[0021] In the drawings: 1, base; 2, placement frame; 3, barrier plate; 4, clamping frame; 5, clamping plate; 6, band-pass filter device; 7, positioning block; 8, heat dissipation mechanism; 9, limiting frame; 10, fixed frame; 81, limiting box; 82, sliding ring; 83, spring; 84, support plate; 85, exhaust fan. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0023] In the description of the utility model, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "in", "out" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation of the utility model.

[0024] The thin film band-pass filter based on the LTCC substrate disclosed by the utility model mainly applies hot air generated after long time work to influence the working scene.

[0025] Refer to Figure 1 - Figure 4 A thin film band-pass filter based on LTCC substrate, including base 1, the upper surface of base 1 is fixedly connected with placing frame 2, the inner cavity of placing frame 2 is movably connected with band-pass filter device 6, the bottom surface of the inner cavity of placing frame 2 is penetrated by heat dissipation mechanism 8, heat dissipation mechanism 8 includes limiting box 81, the bottom surface of the inner cavity of placing frame 2 is penetrated by limiting box 81, the inner cavity of limiting box 81 is movably connected with exhaust fan 85, the air outlet of exhaust fan 85 faces downward, by setting placing frame 2, band-pass filter device 6 can be placed, by setting heat dissipation mechanism 8, band-pass filter device 6 can be cooled during work, and the vibration generated by fan rotation can be prevented from affecting the normal work of band-pass filter device 6, so as to improve the accuracy of data, by setting exhaust fan 85, the hot air generated by the work of band-pass filter device 6 can be taken away after power is connected and switch is opened.

[0026] Refer to Figure 1 - Figure 3 In a preferred embodiment, the outer side of the band-pass filter device 6 is symmetrically fixedly connected with the clamping plate 5, the outer surface of the clamping plate 5 is sleeved with the clamping frame 4, by setting the clamping frame 4, the clamping plate 5 can be limited, so that the band-pass filter device 6 can be connected with the clamping frame 4, the side, away from the band-pass filter device 6, of the clamping plate 5 is fixedly connected with the positioning block 7, the positioning block 7 is frictionally matched with the groove of the clamping frame 4, by setting the positioning block 7, the tightness of the connection between the clamping plate 5 and the clamping frame 4 can be increased, the outer surface of the clamping frame 4 is fixedly connected with the limiting frame 9, the inner cavity of the limiting frame 9 is rotatably connected with the fixing frame 10, by setting the limiting frame 9, the fixing frame 10 can be stably rotated in the inner cavity thereof by cooperating with the fixing frame 10, the outer side of the placing frame 2 is symmetrically fixedly connected with the blocking plate 3, the blocking plate 3 is extrusionally matched with the fixing frame 10, by setting the blocking plate 3, the fixing frame 10 can be blocked, so that the fixing frame 10 is tightly connected at the blocking plate 3.

[0027] Refer to Figure 1 and Figure 4In a preferred embodiment, the outer surface of the exhaust fan 85 is fixedly connected with a support plate 84, the bottom end of the support plate 84 is fixedly connected with a sliding ring 82, the sliding ring 82 is slidingly connected at the inner cavity of the limiting box 81, by arranging the sliding ring 82, the vertical up-and-down moving effect can be generated in the inner cavity of the limiting box 81, the lower surface of the sliding ring 82 is fixedly connected with springs 83, the bottom end of the spring 83 is fixedly connected with the bottom surface of the inner cavity of the limiting box 81, the number of the spring 83 is several, and the several springs 83 are uniformly distributed, by arranging the spring 83, the bottom of the sliding ring 82 can be supported, so that the sliding ring 82 can move up and down in the inner cavity of the limiting box 81.

[0028] Working principle: in use, the operator inserts the clamping plate 5 outside the band-pass filter device 6 into the inner cavity of the clamping frame 4, then rotates the fixing frame 10, and makes the fixing frame 10 tightly extruded with the lower surface of the blocking plate 3, then connects the exhaust fan 85 to the power supply and opens the switch, so that the exhaust fan 85 starts to work, so that the hot air on the outer surface of the band-pass filter device 6 can be exhausted, at the same time, the vibration generated by the working of the exhaust fan 85 can be buffered by the spring 83.

[0029] The above is only a preferred embodiment of the present application, but the protection scope of the present application is not limited to this. The replacement can be the replacement of part of the structure, device, method step, or the complete technical solution. According to the technical solution and the utility model concept of the present application, equivalent replacement or change should be covered in the protection scope of the present application.

Claims

1. A thin film band-pass filter based on an LTCC substrate, comprising a base (1), an upper surface of the base (1) being fixedly connected with a placing frame (2), characterized in that, The movable connection is arranged in the inner cavity of the placing frame (2), and the movable connection is arranged in the inner cavity of the placing frame (2). The bottom surface of the inner cavity is penetrated by a heat dissipation mechanism (8), and the heat dissipation mechanism (8) comprises a limiting box (81), the limiting box (81) penetrates the bottom surface of the inner cavity of the placing frame (2), and the inner cavity of the limiting box (81) is movably connected with an exhaust fan (85), and the exhaust port of the exhaust fan (85) faces downward.

2. The LTCC substrate based thin film bandpass filter according to claim 1, characterized in that The outer side of the band-pass filter device (6) is fixedly connected with a clamping plate (5) in a symmetrical manner, and the outer surface of the clamping plate (5) is sleeved with a clamping frame (4).

3. The LTCC substrate based thin film bandpass filter according to claim 2, characterized in that The side away from the band-pass filter device (6) of the clamping plate (5) is fixedly connected with a positioning block (7), and the positioning block (7) is frictionally matched with the groove of the clamping frame (4).

4. The LTCC substrate based thin film bandpass filter according to claim 3, characterized in that The outer surface of the clamping frame (4) is fixedly connected with a limiting box (9), and the inner cavity of the limiting box (9) is rotatably connected with a fixing frame (10).

5. The LTCC substrate based thin film bandpass filter according to claim 4, characterized in that The outer side of the placing frame (2) is fixedly connected with a blocking plate (3) in a symmetrical manner, and the blocking plate (3) is press-fitted with the fixing frame (10).

6. The LTCC substrate based thin film bandpass filter according to claim 1, wherein, The outer surface of the exhaust fan (85) is fixedly connected with a supporting plate (84), the bottom end of the supporting plate (84) is fixedly connected with a sliding ring (82), and the sliding ring (82) is slidingly connected in the inner cavity of the limiting box (81).

7. The LTCC substrate based thin film bandpass filter according to claim 6, characterized in that The lower surface of the sliding ring (82) is fixedly connected with a spring (83), the bottom end of the spring (83) is fixedly connected to the bottom surface of the inner cavity of the limiting box (81), the number of the spring (83) is several, and the several springs (83) are evenly distributed.

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