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Radar device

A technology of radar device and shielding shell, which is applied to measurement devices, antennas, instruments, etc., can solve problems such as the inability to fully suppress the noise floor, and achieve the effect of efficient emission

Pending Publication Date: 2022-02-25
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the surrounding of the electric field is significant near the high-frequency IC, the radio wave absorber installed at a part far from the high-frequency IC cannot sufficiently suppress the floor noise

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach ＞

[0022] 1. Structure of the radar device 1

[0023] based on Figure 1 ~ Figure 3 The configuration of the radar device 1 will be described. The radar device 1 is, for example, a vehicle-mounted device. The radar device 1 can be used, for example, in advanced driver assistance systems, automatic driving, and the like. The radar device 1 is, for example, a millimeter-wave radar.

[0024] Such as figure 1 As shown, the radar device 1 includes a substrate 3 , an MMIC 5 , a shield case 7 , a radio wave absorbing heat dissipation gel 9 , and a metal frame 11 . The MMIC 5 is mounted on the substrate 3 . MMIC5 corresponds to high-frequency IC. The substrate 3 is provided with a case receiving portion 13 . The case receiving portion 13 is a wall-shaped member arranged to surround the MMIC 5 . The housing receiver 13 is made of metal.

[0025] Such as Figure 1 ~ Figure 3 As shown, the shield case 7 is a box-shaped member with an opening on the side of the substrate 3 . The s...

no. 2 approach ＞

[0046] 1. Differences from the first embodiment

[0047] Since the basic configuration of the second embodiment is the same as that of the first embodiment, different points will be described below. In addition, the same code|symbol as 1st Embodiment represents the same structure, refer to the previous description.

[0048] In the first embodiment described above, there is no component between the convex portion 19 and the convex portion 21 . In contrast, in the second embodiment, as Figure 4 As shown, the point where the radio wave absorbing heat dissipation gel 23 is filled between the convex portion 19 and the convex portion 21 is different from the first embodiment.

[0049] The radio wave absorbing heat dissipation gel 23 has the same composition as the radio wave absorbing heat dissipation gel 9 . The radio wave absorbing heat radiation gel 23 corresponds to heat radiation gel. The radio wave absorbing heat radiation gel 23 is in contact with the convex portion 19 and...

no. 3 approach ＞

[0055] 1. Differences from the first embodiment

[0056] Since the basic configuration of the third embodiment is the same as that of the first embodiment, different points will be described below. In addition, the same code|symbol as 1st Embodiment represents the same structure, refer to the previous description.

[0057] In the first embodiment described above, no components are attached to the peripheral portion 20 . In contrast, in the third embodiment, as Figure 5 , Figure 6 As shown, the point that the radio wave absorber 25 is provided on the inner surface of the peripheral portion 20 is different from the first embodiment.

[0058] Such as Figure 6 As shown, the radio wave absorber 25 is disposed so as to surround the convex portion 19 . The radio wave absorber 25 is disposed so as to surround the MMIC 5 when viewed in the thickness direction of the substrate 3 . The radio wave absorber 25 contains, for example, a filler for radio wave absorption. As a filler...

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Abstract

A radar device (1) is provided with: a substrate (3); a high-frequency IC (5) that is mounted to the substrate; a shield case (7) that houses the high-frequency IC; and a radio wave absorbing and heat dissipating gel (9) that covers at least part of the high-frequency IC and is in contact with the shield case. The shield case is provided with a protrusion (19) protruding to the high-frequency IC side, for example, in a portion facing the high-frequency IC. The radio wave absorbing and heat dissipating gel is in contact with the protrusion. The surface roughness Rz of a portion that is in contact with the radio wave absorbing and heat dissipating gel of the shield case is, for example, from 10 to 1000.

Description

[0001] Cross References to Related Applications [0002] This international application claims priority based on Japanese Patent Application No. 2019-125992 filed with the Japan Patent Office on July 5, 2019, and the entire contents of Japanese Patent Application No. 2019-125992 are incorporated into this international application by reference. technical field [0003] The present disclosure relates to radar devices. Background technique [0004] The radar device includes a high-frequency IC such as a MMIC (Monolithic Microwave IC: Monolithic Microwave Integrated Circuit). In order to prevent external noise, the high-frequency IC is covered by a shield case. Patent Document 1 discloses a technique related to a shield case. [0005] Patent Document 1: Japanese Patent Laid-Open No. 2018-207040 [0006] As a result of detailed studies by the inventors, the following problems were found. In the shielding shell, the surround of the electric field from the sending channel to t...

Claims

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Application Information

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IPC IPC(8): G01S7/03H01P1/30H01Q17/00H05K7/20H05K9/00
CPCG01S7/03H01P1/30H01Q17/00H05K7/20H05K9/00G01S7/028G01S7/032H01Q1/2283H01Q9/0407
Inventor 田井中佑介新带亮川野晋司
Owner DENSO CORP
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