JPH0512668B2 - - Google Patents
Info
- Publication number
- JPH0512668B2 JPH0512668B2 JP63059765A JP5976588A JPH0512668B2 JP H0512668 B2 JPH0512668 B2 JP H0512668B2 JP 63059765 A JP63059765 A JP 63059765A JP 5976588 A JP5976588 A JP 5976588A JP H0512668 B2 JPH0512668 B2 JP H0512668B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- radome
- radar device
- antennas
- types
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000000737 periodic effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明はレーダ装置に利用するアンテナに関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to an antenna used in a radar device.
第２図は従来の飛しよう体用レーダ装置の一部
を示すもので、１はレドーム、４はアンテナをそ
れぞれ示している。
FIG. 2 shows a part of a conventional airborne radar device, in which 1 represents a radome and 4 represents an antenna.
本レーダ装置が目標の追尾を行うには、地上に
設置した送信設備や飛しよう体に搭載した送信機
などから発する電波を目標に照射し、目標からの
反射波を本レーダ装置のアンテナ４で受信する方
式、もしくは目標自身のレーダ装置が放射する放
射波を本レーダ装置のアンテナ４で受信する方式
などがある。目標からの反射波を受信する方式
は、目標に電波を照射するため、逆に目標側から
追尾側の探知が行われやすく、飛しよう体の行動
目的によつては好ましくないことがある。また目
標自身のレーダ装置が放射する放射波を受信する
方式においては、使用周波数の異なる種々の目標
に対応するため、追尾側のレーダ装置のアンテ
ナ、受信機等は十分広帯域であることが必要であ
る。帯域が数オクターブにわたるアンテナは、一
般のレーダ装置に用いられる開口面アンテナや、
平面アンテナに比較してビーム幅が大きく、追尾
精度が悪くなるという欠点がある。さらに目標側
のレーダ装置が送信を停止すると、追尾ができな
くなるという問題もある。 In order for this radar device to track a target, radio waves emitted from transmitting equipment installed on the ground or a transmitter mounted on a flying object are irradiated onto the target, and the reflected waves from the target are transmitted to the antenna 4 of this radar device. There are two methods: a receiving method, and a method of receiving radiation waves emitted by the target's own radar device using the antenna 4 of the radar device. In the method of receiving reflected waves from a target, radio waves are irradiated to the target, so conversely, the target side tends to detect the tracking side, which may be undesirable depending on the purpose of the flying object. Furthermore, in the method of receiving radiation waves emitted by the target's own radar equipment, the antenna, receiver, etc. of the radar equipment on the tracking side must have a sufficiently wide band in order to support various targets using different frequencies. be. Antennas with bands spanning several octaves include aperture antennas used in general radar equipment,
The disadvantage is that the beam width is larger than that of a planar antenna, resulting in poor tracking accuracy. Furthermore, if the radar device on the target side stops transmitting, there is also the problem that tracking becomes impossible.
そこで前記の２種の方式の欠点を互いに補うた
め、２種の方式を複合したレーダ装置が考えられ
る。 Therefore, in order to mutually compensate for the shortcomings of the above two types of systems, a radar device that combines the two types of systems can be considered.
前記の２種の方式を複合したレーダ装置は、タ
イプの異なる２種のアンテナが必要である。例え
ば、２種のアンテナを平面アンテナと広帯域特性
の対数周期アンテナとし、第３図のように組合せ
た場合を考える。平面アンテナ２は狭ビーム幅と
なるため、追尾のためにはアンテナ走査が必要と
なる。この場合走査時に対数周期アンテナ３とレ
ドーム１が干渉するため、走査角が制限され追尾
範囲が狭くなる。また対数周期アンテナ３を固定
したまま平面アンテナ２を走査しようとすると平
面アレイアンテナの外形々状に多くの制限を加え
る必要があり、性能劣化が予想される。
A radar device that combines the above two types of systems requires two types of antennas of different types. For example, consider a case where two types of antennas are a planar antenna and a log-periodic antenna with broadband characteristics, and they are combined as shown in FIG. Since the planar antenna 2 has a narrow beam width, antenna scanning is required for tracking. In this case, the logarithmically periodic antenna 3 and the radome 1 interfere during scanning, which limits the scanning angle and narrows the tracking range. Furthermore, if it is attempted to scan the planar antenna 2 while the logarithmically periodic antenna 3 is fixed, it is necessary to impose many restrictions on the external shape of the planar array antenna, and performance deterioration is expected.
このように飛しよう体用レーダ装置のように限
られた空間内に互いの機能を損なうことなく２種
のアンテナを配置することは困難であるという問
題点があつた。 There is a problem in that it is difficult to arrange two types of antennas in a limited space such as in a flying radar system without impairing each other's functions.
この発明によるレーダ装置は、装置の有する２
種のアンテナのうち、線状アンテナをレドームの
面上〜にレドームと一体となるように設けたもの
である。
The radar device according to the present invention has two
Among these types of antennas, a linear antenna is provided on the surface of the radome so as to be integrated with the radome.
この発明におけるレーダ装置は、装置の有する
２種のアンテナのうち、線状アンテナをレドーム
の面上に設けることにより、限られた空間内に２
種のアンテナを配置することが容易となる。
The radar device according to the present invention has two types of antennas included in the device, and by providing a linear antenna on the surface of the radome, two types of antennas can be installed in a limited space.
This makes it easy to place seed antennas.
第１図はこの発明の一実施例を示すもので、１
はレドーム、２は平面アンテナ、３は対数周期ア
ンテナをそれぞれ示している。
FIG. 1 shows one embodiment of this invention.
2 represents a radome, 2 represents a planar antenna, and 3 represents a logarithmically periodic antenna.
レドーム１の肉厚は電気的に平面アンテナ２の
使用波長の半波長もしくは半波長の整数倍程度と
し、平面アンテナ２に対する透過特性を考慮して
定める。対数周期アンテナ３は第１図のようにレ
ドーム１の外面および内面に導体のストリツプパ
ターンを形成することにより構成できる。この場
合、対数周期アンテナ３への給電は同軸ケーブル
を接合すればよい。レドーム１上に複数の対数周
期アンテナ３を構成すれば、位相比較モノパルス
方式により目標に対する追尾信号を合成すること
ができる。 The thickness of the radome 1 is electrically set to about a half wavelength of the wavelength used by the planar antenna 2 or an integer multiple of the half wavelength, and is determined in consideration of the transmission characteristics for the planar antenna 2. The log-periodic antenna 3 can be constructed by forming a conductor strip pattern on the outer and inner surfaces of the radome 1, as shown in FIG. In this case, power can be fed to the logarithmic periodic antenna 3 by connecting a coaxial cable. By configuring a plurality of log-periodic antennas 3 on the radome 1, it is possible to synthesize tracking signals for a target using a phase comparison monopulse method.
平面アンテナ２から見た場合、対数周期アンテ
ナ３のストリツプパターンはブロツキングとなる
が、ストリツプパターンをレドーム面積に比して
十分小さくしておけば、平面アンテナ２に与える
影響は小さい。 When viewed from the planar antenna 2, the strip pattern of the log-periodic antenna 3 causes blocking, but if the strip pattern is made sufficiently small compared to the radome area, the effect on the planar antenna 2 is small.
また、平面アンテナ２のジンバルによる走査
は、対数周期アンテナ３による影響も受けないた
め、走査角を制限されることもない。 Moreover, since the scanning by the gimbal of the planar antenna 2 is not affected by the logarithmically periodic antenna 3, the scanning angle is not limited.
なお対数周期アンテナ３は、八木アンテナやダ
イポールアンテナ等の他の線状アンテナでも良
く、また線上アンテナは、ストリツプパターンで
はなく導線をレドーム１面上もしくは内部に設け
たものでもよい。 Note that the logarithmic periodic antenna 3 may be any other linear antenna such as a Yagi antenna or a dipole antenna, and the linear antenna may be one in which a conducting wire is provided on or inside the radome instead of a strip pattern.
さらに、平面アンテナ２はパラボラ、カセグレ
ン等の開口面アンテナでもよい。 Furthermore, the planar antenna 2 may be an aperture antenna such as a parabola or a Cassegrain.
以上のようにこの発明によれば、線状アンテナ
をレドーム１の面上にレドームと一体となるよう
に設けたので、２種のアンテナを互いに機能を損
なうことなく配置することが可能となり、複合方
式のレーダ装置を容易に構成できる効果がある。
As described above, according to the present invention, since the linear antenna is provided on the surface of the radome 1 so as to be integrated with the radome, it is possible to arrange two types of antennas without impairing each other's functions. This has the effect of making it easy to configure a radar device based on this method.
第１図はこの発明の一実施例による飛しよう体
用レーダ装置を示す一部欠載図、第２図は従来の
飛しよう体用レーダ装置を示す一部欠載図、第３
図は従来の平面アンテナと対数周期アンテナの組
合せ例を示す斜視図である。
図中１はレドーム、２は平面アンテナ、３は対
数周期アンテナ、４はアンテナである。なお、図
中、同一符号は同一、又は相当部分を示す。
FIG. 1 is a partially-missed view showing a radar device for a flying object according to an embodiment of the present invention, FIG. 2 is a partially-missed view showing a conventional radar device for a flying object, and FIG.
The figure is a perspective view showing an example of a combination of a conventional planar antenna and a log-periodic antenna. In the figure, 1 is a radome, 2 is a planar antenna, 3 is a log-periodic antenna, and 4 is an antenna. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (1)
アンテナを覆うレドームとを備えたレーダ装置に
おいて、前記レドームの面上に線状アンテナをレ
ドームと一体となるように設けたことを特徴とす
るレーダ装置。1. A radar device comprising an aperture antenna or a planar antenna and a radome covering the antenna, characterized in that a linear antenna is provided on the surface of the radome so as to be integrated with the radome.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63059765A JPH01233381A (en) | 1988-03-14 | 1988-03-14 | Radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63059765A JPH01233381A (en) | 1988-03-14 | 1988-03-14 | Radar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01233381A JPH01233381A (en) | 1989-09-19 |
| JPH0512668B2 true JPH0512668B2 (en) | 1993-02-18 |
Family
ID=13122698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63059765A Granted JPH01233381A (en) | 1988-03-14 | 1988-03-14 | Radar |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01233381A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2671627B2 (en) * | 1991-04-10 | 1997-10-29 | 三菱電機株式会社 | Composite sensor and missile guidance method |
| JP2671628B2 (en) * | 1991-04-16 | 1997-10-29 | 三菱電機株式会社 | Composite sensor and missile guidance method |
| US6243046B1 (en) | 1998-01-13 | 2001-06-05 | Mitsubishi Denki Kabushiki Kaisha | Antenna system for minimizing the spacing between adjacent antenna units |
| JP5661423B2 (en) | 2010-10-28 | 2015-01-28 | 株式会社デンソー | Radar equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62142699U (en) * | 1986-02-28 | 1987-09-09 |
-
1988
- 1988-03-14 JP JP63059765A patent/JPH01233381A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01233381A (en) | 1989-09-19 |
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