JP2614276B2 - Mobile device antenna device - Google Patents
Mobile device antenna deviceInfo
- Publication number
- JP2614276B2 JP2614276B2 JP63185803A JP18580388A JP2614276B2 JP 2614276 B2 JP2614276 B2 JP 2614276B2 JP 63185803 A JP63185803 A JP 63185803A JP 18580388 A JP18580388 A JP 18580388A JP 2614276 B2 JP2614276 B2 JP 2614276B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- antenna element
- resin
- filled
- low
- 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 - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 30
- 239000011347 resin Substances 0.000 claims description 30
- 239000006260 foam Substances 0.000 claims description 6
- 238000005187 foaming Methods 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 9
- 239000000463 material Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
Landscapes
- Details Of Aerials (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、自動車等の移動体に搭載する移動体搭載用
アンテナ装置に関するものである。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antenna device for mounting on a moving body such as an automobile.
［従来の技術］ 移動体に搭載して使用するアンテナは、固定して使用
する場合よりも設計上の配慮が必要となる。例えば、車
載用の場合、耐候性の他に、耐振動性・衝撃特性、耐油
性、耐摩耗性（洗車時を考慮）などが要求される。ま
た、車載用の場合は、外観上及び洗車時、車庫入れ時を
考慮して低背型のアンテナが要求されることも多い。[Prior Art] An antenna to be mounted on a moving body requires more design considerations than when it is fixedly used. For example, in the case of a vehicle, in addition to weather resistance, vibration resistance / impact characteristics, oil resistance, abrasion resistance (considering car washing) are required. In addition, in the case of a vehicle-mounted antenna, a low-profile antenna is often required in view of appearance, car washing, and garage entry.
更に、近年、移動体通信用周波数帯は、800MHzから1.
5GHzあるいは2.5GHz帯に移行する傾向にあり、アンテナ
部と車内の受信機部とを接続する同軸ケーブルの損失が
無視できなくなってきており、アンテナ部に高周波増幅
器、ミキサ、局部発信器、フィルタ、高周波出力回路部
等を内蔵する必要も生じている。Furthermore, in recent years, the frequency band for mobile communication has been increased from 800 MHz to 1.
There is a tendency to shift to the 5 GHz or 2.5 GHz band, and the loss of the coaxial cable that connects the antenna unit and the receiver unit in the car can not be ignored, and the antenna unit has a high-frequency amplifier, mixer, local oscillator, filter, It is also necessary to incorporate a high-frequency output circuit and the like.
これらの背景から、車載用アンテナとしては、マイク
ロストリップアンテナを用いて平板形状とし、同時に前
記回路部も一体化して高感度、高出力化する傾向が一般
的である。From these backgrounds, as a vehicle-mounted antenna, a microstrip antenna is generally used to form a flat plate shape, and at the same time, the circuit unit is also integrated to tend to have high sensitivity and high output.
マイクロストリップアンテナと周辺回路部を一体化し
て車体外部に設置しようとすると、前述の理由により、
強固な外殻と、気密性の高い構造のアンテナカバー（あ
るいはケース）が必要となる。しかし、このようなアン
テナカバーでアンテナを覆うと、電波の透過損失が増
し、これを避けるため高周波特性の良好な材料（例え
ば、テフロン樹脂など）を使用すると高価になるという
問題がある。また、気密性を良好にしようとすると、嵌
合部の構造が複雑となり、パッキング部品も必要となる
ため高価になるという問題が生じる。When the microstrip antenna and the peripheral circuit unit are integrated and installed outside the vehicle, for the reasons described above,
A strong outer shell and a highly airtight antenna cover (or case) are required. However, when the antenna is covered with such an antenna cover, there is a problem that transmission loss of radio waves increases, and if a material having good high-frequency characteristics (for example, Teflon resin) is used to avoid this, it becomes expensive. In addition, if the airtightness is to be improved, the structure of the fitting portion becomes complicated, and a packing component is required, resulting in a problem of high cost.
［発明が解決しようとする課題］ 本発明は、上述の点に鑑みて提供したものであって、
外殻を構成するアンテナカバーを薄くして耐摩耗特性の
みを分担し、耐荷重性など構造的強度は内部の発泡樹脂
で実現し、電波の透過損失を少なくし、且つコストを下
げ、また、アンテナカバー内部のアンテナ素子の支持及
びアンテナカバーの内部からの支持を発泡樹脂で行なっ
て、簡易、軽量、低損失且つ安価に実現することを目的
とした移動体搭載用アンテナ装置を提供するものであ
る。[Problem to be Solved by the Invention] The present invention has been provided in view of the above points,
The outer shell is made thinner and the antenna cover is made thinner, and only the wear resistance is shared.Structural strength such as load resistance is realized by the internal foam resin, which reduces transmission loss of radio waves and lowers costs. The present invention provides an antenna device for mounting on a moving body, which is intended to be simple, lightweight, low-loss, and inexpensive by supporting the antenna element inside the antenna cover and supporting the inside of the antenna cover with the foamed resin. is there.
［課題を解決するための手段］ 本発明は、アンテナ素子を収納したアンテナカバーの
内部の、アンテナ素子の近傍には高発泡樹脂を充填し、
それ以外には低発泡樹脂を充填したものである。Means for Solving the Problems According to the present invention, a highly foamed resin is filled in the vicinity of the antenna element inside the antenna cover housing the antenna element,
In addition, it is filled with a low foaming resin.
［作用］ アンテナカバーの内部の、アンテナ素子の近傍には高
発泡樹脂を充填し、それ以外には低発泡樹脂を充填し
て、内部よりアンテナカバーを支持すると同時にアンテ
ナ素子の支持も行なうようにしている。[Function] The inside of the antenna cover is filled with a high foaming resin in the vicinity of the antenna element, and the other is filled with a low foaming resin, so that the antenna cover is supported from the inside and the antenna element is supported at the same time. ing.
更に、少なくともアンテナ素子を近傍には高周波損失
の少ない発泡樹脂を充填して、電波の透過損失を少なく
している。Further, at least the vicinity of the antenna element is filled with a foamed resin having a small high-frequency loss to reduce the transmission loss of radio waves.
［実施例］ 以下、本発明の実施例を図面を参照して説明する。第
１図はアンテナ部の断面図を、第２図は斜視図を夫々示
している。背の低いアンテナ本体１から同軸ケーブル２
が導出されており、同軸ケーブル２の先端には信号を出
力するコネクタ３が設けてある。アンテナとしてはスト
リップライン型アンテナを使用し、その板状のアンテナ
素子５は、ストリップライン型アンテナのアース板を兼
ねた回路収納箱７と間をあけて配置される。回路収納箱
７からは給電ピン６が突設され、アンテナ素子５を接続
されている。この回路収納箱７及びアンテナ素子５はア
ンテナカバー４と裏板８とで構成される外殻の内部に配
置される。アンテナカバー４には、例えば、ABS樹脂等
の安価な材料を使用し、外殻を薄くして、電波の透過損
失を減少させている。[Example] Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view of the antenna unit, and FIG. 2 is a perspective view. Coaxial cable 2 from short antenna body 1
A connector 3 for outputting a signal is provided at the end of the coaxial cable 2. A strip line type antenna is used as the antenna, and the plate-shaped antenna element 5 is arranged with a space between the antenna and the circuit storage box 7 also serving as a ground plate of the strip line type antenna. A power supply pin 6 protrudes from the circuit storage box 7 and is connected to the antenna element 5. The circuit storage box 7 and the antenna element 5 are arranged inside an outer shell composed of the antenna cover 4 and the back plate 8. For the antenna cover 4, for example, an inexpensive material such as ABS resin is used, and the outer shell is thinned to reduce transmission loss of radio waves.
本実施例は、アンテナ素子５の近傍に高発泡樹脂11a
を充填し、それ以外の部分には低発泡樹脂11bを充填し
たものであり、他の構成は第１図の場合と同様である。
尚、発泡樹脂11a,11bは予め形成したものを配置してお
いても良い。このように構成することで、アンテナ素子
５近傍の樹脂密度を減少させて、電波透過損失（誘電体
損失）を少なくすることができる。また、アンテナ素子
５に近傍に電波透過損失の少ない材料の配置することも
できる。すなわち、アンテナ素子５の周辺には、予め発
泡させた高発泡ポリスチレン等の、電波透過損失の少な
い樹脂の成形品を配置しておき、アンテナ素子５から比
較的遠い部分（周縁部）には硬質発泡ポリスチレン樹脂
を充填している。こうすることにより、高周波特性の良
好な熱可塑性樹脂を組み合わせて使用することが可能に
なる。また、気密性を必要とする裏板８付近は、組立後
に発泡樹脂を注入硬化させるため、密封してある。In this embodiment, the high foaming resin 11a is provided near the antenna element 5.
And the other parts are filled with the low-foaming resin 11b, and the other configuration is the same as that of FIG.
The foamed resins 11a and 11b may be formed in advance. With this configuration, the resin density in the vicinity of the antenna element 5 can be reduced, and radio wave transmission loss (dielectric loss) can be reduced. Further, a material having a small radio wave transmission loss can be arranged near the antenna element 5. That is, around the antenna element 5, a molded product of a resin having a small radio wave transmission loss, such as pre-foamed high-expansion polystyrene, is arranged, and a hard portion is formed at a portion relatively far from the antenna element 5 (peripheral portion). Filled with expanded polystyrene resin. This makes it possible to use a combination of thermoplastic resins having good high-frequency characteristics. Further, the vicinity of the back plate 8 requiring airtightness is sealed to inject and cure the foamed resin after the assembly.
［発明の効果］ 本発明は上述のように、アンテナ素子を収納したアン
テナカバーの内部の、アンテナ素子の近傍には高発泡樹
脂を充填し、それ以外には低発泡樹脂を充填して、内部
よりアンテナカバーを支持すると同時にアンテナ素子の
支持も行なうようにしているので、アンテナ素子の近傍
に樹脂密度の低い高発泡樹脂を設けることによって、樹
脂による電波透過損失（誘電体損失）を少なくすること
ができると共に、アンテナ素子の近傍以外に樹脂密度の
高い低発泡樹脂を設けることによって、アンテナカバー
の支持をこの低発泡樹脂でおこなうことができ、アンテ
ナ素子の受信性能を低下させないために強度の小さい高
発泡樹脂を設けたにも拘らず、低発泡樹脂でアンテナカ
バーを支持して強度低下を引き起こすことがないように
することができるものであり、しかもアンテナ素子の支
持及びアンテナカバーの内部からの支持を簡易、軽量、
低損失、且つ安価にすることができる。[Effects of the Invention] As described above, the present invention fills a high foaming resin in the vicinity of the antenna element inside the antenna cover housing the antenna element, and fills the other parts with a low foaming resin. Since the antenna element is supported at the same time as supporting the antenna cover, the radio wave transmission loss (dielectric loss) due to the resin is reduced by providing a high foaming resin with a low resin density near the antenna element. By providing a low-foaming resin having a high resin density other than in the vicinity of the antenna element, the antenna cover can be supported by this low-foaming resin, and the strength is low so as not to reduce the receiving performance of the antenna element. Despite the provision of high foam resin, the antenna cover is supported with low foam resin so that the strength does not decrease. The antenna element support and the support from the inside of the antenna cover are simple, lightweight,
The loss can be reduced and the cost can be reduced.
更に、少なくともアンテナ素子近傍には高周波損失の
少ない発泡樹脂を充填して、電波の透過損失を少なくし
ている。Further, at least the vicinity of the antenna element is filled with a foamed resin having a small high-frequency loss to reduce transmission loss of radio waves.
第１図は本発明の実施例の断面図、第２図は同上の斜視
図である。 ４はアンテナカバー、５はアンテナ素子、11aは高発泡
樹脂、11bは低発泡樹脂である。FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a perspective view of the same. 4 is an antenna cover, 5 is an antenna element, 11a is a high foam resin, and 11b is a low foam resin.
Claims (2)
内部の、アンテナ素子の近傍には高発泡樹脂を充填し、
それ以外には低発泡樹脂を充填して成る移動体搭載用ア
ンテナ装置。1. A highly foamed resin is filled inside an antenna cover containing an antenna element and near the antenna element.
In addition, a moving body mounting antenna device filled with a low foam resin.
失の少ない発泡樹脂を充填した請求項１記載の移動体搭
載用アンテナ装置。2. An antenna device for mounting on a moving body according to claim 1, wherein at least the vicinity of the antenna element is filled with a foamed resin having a low high-frequency loss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63185803A JP2614276B2 (en) | 1988-07-26 | 1988-07-26 | Mobile device antenna device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63185803A JP2614276B2 (en) | 1988-07-26 | 1988-07-26 | Mobile device antenna device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0235803A JPH0235803A (en) | 1990-02-06 |
| JP2614276B2 true JP2614276B2 (en) | 1997-05-28 |
Family
ID=16177161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63185803A Expired - Lifetime JP2614276B2 (en) | 1988-07-26 | 1988-07-26 | Mobile device antenna device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2614276B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004120358A (en) * | 2002-09-26 | 2004-04-15 | Matsushita Electric Ind Co Ltd | Wireless communication antenna |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5670745A (en) * | 1993-12-27 | 1997-09-23 | Mitsumi Electric Co., Ltd. | Hermetically sealed case sealed by packing |
| US5585806A (en) * | 1993-12-28 | 1996-12-17 | Mitsumi Electric Co., Ltd. | Flat antenna apparatus having a shielded circuit board |
| US6539608B2 (en) * | 1996-06-25 | 2003-04-01 | Nortel Networks Limited | Antenna dielectric |
| IL173941A0 (en) * | 2006-02-26 | 2007-03-08 | Haim Goldberger | Monolithic modules for high frequecney applications |
| JP4870509B2 (en) * | 2006-09-27 | 2012-02-08 | 新光電気工業株式会社 | Electronic equipment |
| US8626087B2 (en) * | 2009-06-16 | 2014-01-07 | Rosemount Inc. | Wire harness for field devices used in a hazardous locations |
| US9674976B2 (en) | 2009-06-16 | 2017-06-06 | Rosemount Inc. | Wireless process communication adapter with improved encapsulation |
| US10761524B2 (en) | 2010-08-12 | 2020-09-01 | Rosemount Inc. | Wireless adapter with process diagnostics |
| US9163974B1 (en) * | 2014-12-11 | 2015-10-20 | Enevo Oy | Wireless gauge apparatus and manufacturing method thereof |
| CN107004944A (en) * | 2014-12-18 | 2017-08-01 | 赫希曼汽车通讯有限公司 | Waterproof LTE antenna with polyurethane casting matrix |
| JP7110058B2 (en) * | 2017-10-18 | 2022-08-01 | Ntn株式会社 | Cover and automotive fin-type antenna device |
| WO2019078303A1 (en) * | 2017-10-18 | 2019-04-25 | Ntn株式会社 | Cover and vehicle-mounted fin type antenna device |
| JP7079671B2 (en) * | 2018-06-26 | 2022-06-02 | 三菱重工業株式会社 | Internal pressure explosion-proof antenna and internal pressure explosion-proof structure of antenna, manufacturing method of internal pressure explosion-proof antenna, and moving object |
| DE102018124277A1 (en) | 2018-10-02 | 2020-04-02 | Dr. Ing. H.C. F. Porsche Aktiengesellschaft | Antenna arrangement |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5331936A (en) * | 1976-09-06 | 1978-03-25 | Mitsubishi Electric Corp | Antenna unit |
| JPS61195005A (en) * | 1985-02-25 | 1986-08-29 | Matsushita Electric Works Ltd | Protecting cover material of plane antenna |
-
1988
- 1988-07-26 JP JP63185803A patent/JP2614276B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004120358A (en) * | 2002-09-26 | 2004-04-15 | Matsushita Electric Ind Co Ltd | Wireless communication antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0235803A (en) | 1990-02-06 |
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