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Radome, antenna device and radar device

A technology of antenna device and radome, which is applied in the field of radome and can solve problems such as inability to radiate radio waves

Active Publication Date: 2016-03-16
FURUNO ELECTRIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, in the structures of the radome shown in Patent Document 1 and Patent Document 2, it is not possible to expand the angular range in which the radio wave in the vertical direction is equal to or higher than a predetermined level (vertical direction directivity).
Therefore, when the ship on which the antenna device is installed shakes, radio waves at an effective level may not be radiated in the target direction.

Method used

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  • Radome, antenna device and radar device
  • Radome, antenna device and radar device
  • Radome, antenna device and radar device

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Embodiment Construction

[0037] A radome according to a first embodiment of the present invention will be described with reference to the drawings. In addition, the case where radio waves are radiated by the antenna device including the radome will be described below as an example, but the same effect can be obtained also when radio waves are received from the outside. figure 1 (A) is a side sectional view showing the structure of the radome 10 of this embodiment, figure 1 (B) is a partial front view of the radome 10 .

[0038] The shape of the front view of the radome 10 is a long shape (rectangular), and the side section is as follows: figure 1 As shown in (A), it consists of a semicircle. The radome 10 includes an outer wall 11 and an inner wall 12 . The outer wall 11 and the inner wall 12 are formed of the same dielectric material.

[0039] The outer wall 11 constitutes the outer wall surface of the radome 10, has a predetermined thickness, and is formed in a semicircular shape with a radius R...

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Abstract

A radome capable of increasing directivity in the vertical direction, an antenna device including the radome, and a radar device including the antenna device are realized. A radome (10) includes an outer wall (11) having a semicircular side section, and an inner wall (12) disposed inside the outer wall. The inner wall is composed of a first inner wall (211) and a second inner wall (212). When the first inner wall is viewed from the side, it is from the midpoint (Pc) on the circumference of the outer wall to the distance between the midpoint (Pc) and the two ends (Pe). In the range of predetermined positions between them, they are arranged with a fixed minimum distance (dc) from the outer wall. The second inner wall is formed of a flat plate having one end connected to the end of the first inner wall and having a plane parallel to a straight line connecting the midpoint (Pc) and the center (Po). Accordingly, the shortest distance (de) between the outer wall and the inner wall near the end (Pe) of the outer wall is wider than the shortest distance (dc) between the outer wall and the inner wall near the midpoint (Pc) of the outer wall.

Description

technical field [0001] The present invention relates to an antenna device for transmitting and receiving radio waves and a radar device including the antenna device, and more particularly to a radome for protecting an antenna of the antenna device. Background technique [0002] Conventionally, a radar device is provided with an antenna that receives a supply of radiating power, radiates (emits) radio waves of a predetermined frequency, and receives external radio waves such as reflected waves of the radiated radio waves. Furthermore, in order to protect such an antenna from the external environment, a radome having a shape to cover the antenna is used, and an antenna device is constituted by the antenna and the radome. [0003] As a structure for protecting the antenna, the radome also has a wall surface in the maximum radiation direction of the antenna. However, since reflection of radio waves or the like occurs on the wall surface of the radome, its influence must be supp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01Q1/42G01S13/02
CPCH01Q1/42H01Q15/02H01Q15/08H01Q19/06
Inventor 宫川哲也箟耕治
Owner FURUNO ELECTRIC CO LTD
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