JPS6051008A - On-vehicle composite antenna - Google Patents
On-vehicle composite antennaInfo
- Publication number
- JPS6051008A JPS6051008A JP58141629A JP14162983A JPS6051008A JP S6051008 A JPS6051008 A JP S6051008A JP 58141629 A JP58141629 A JP 58141629A JP 14162983 A JP14162983 A JP 14162983A JP S6051008 A JPS6051008 A JP S6051008A
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- vehicle body
- vehicle
- earth plate
- hula hoop
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
Landscapes
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Details Of Aerials (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、フラフープアンテナを用いた多チャネルの複
合アンテナに関し、特にＫＨｚ帯のＡＭ放送も受信でき
るようにしたものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multi-channel composite antenna using a hula hoop antenna, which is particularly capable of receiving AM broadcasts in the KHz band.
自動車等の移動体の電波利用は、業務以外でも■ＡＭＡ
Ｍ放送ＦＭ放送、■ＶＨＦ帯ＴＶ、■ＵＨＦ帯ＴＶ、■
無線電話等、極めて広い周波数帯域にわたる傾向にある
。しかし、これらの各アンテナを地上高の高い（利得の
良い）車両の屋根付近に林立させれば美感上のみならず
走行性能面からも好ましくない。Radio waves from mobile devices such as cars can be used for purposes other than business ■AMA
M broadcast FM broadcast, ■VHF band TV, ■UHF band TV, ■
Radio telephones and the like tend to cover extremely wide frequency bands. However, if these antennas are arranged near the roof of a vehicle with a high ground clearance (good gain), it is undesirable not only from an aesthetic point of view but also from a driving performance point of view.
本発明の第１の目的は、フラフープ（Ｈｕｌａ−Ｈｏｏ
ｐ ）アンテナを利用してコンパクトな多チヤネル複合
アンテナを構成しようとするものである。フラフープア
ンテナはＤ Ｄ ＲＲ（Ｄｉｒｅｃｔｉｏｎａｌ−ｄｉ
ｓｃｏｎｔｉｎｕｉｔｙ ｒｉｎｇ−ｒａｄｉａｔｏｒ
）アンテナとも呼ばれる円周λ／４のリング状のアン
テナで、その性能は長さλ／４のホイップアンテナに相
当する。そして、リング状のエレメントを地板から水平
に僅か０．００７λ程度浮かせただけでも受信可能とな
った報告例もある。The first object of the present invention is to
p) An attempt is made to construct a compact multi-channel composite antenna using antennas. The hula hoop antenna is a DD RR (Directional-di) antenna.
scontinuity ring-radiator
) It is a ring-shaped antenna with a circumference of λ/4, also called an antenna, and its performance is equivalent to a whip antenna with a length of λ/4. There are also reports that reception is possible even when the ring-shaped element is lifted horizontally from the ground plane by only about 0.007λ.
ところで翫このフラフープアンテナでＫＨｚ帯のＡＭ放
送を受信しようとすると、その波長λが１９０〜６００
ｍもあるので非常に大径になり、到底車載用には使用で
きない。By the way, if you try to receive AM broadcasts in the KHz band with this hula hoop antenna, the wavelength λ will be 190 to 600.
m, so it has a very large diameter and cannot be used for automotive applications.
本発明の第２の目的は、上述したフラフープアンテナの
地板を利用してＫＩ（ｚ帯の容量性アンテナを構成する
ことにある。A second object of the present invention is to construct a KI (z-band capacitive antenna) using the ground plate of the hula hoop antenna described above.
本発明の車載用複合アンテナは、地板に対向してＭＨｚ
帯以上の用途に供するフラフープアンテナを配設すると
共にその周囲を誘電体のドームで覆い、且つ該地板を車
両本体から電気的に浮かせて配設することにより、該地
板と車両本体との間をＫＨｚ帯の容量性アンテナとして
使用するようにしてなることを特徴とするが、以下図示
の実施例を参照しながらこれを詳細に説明する。The in-vehicle composite antenna of the present invention has a MHz antenna facing the ground plane.
By arranging a hula hoop antenna that is used for more than just a belt, and covering it with a dielectric dome, and placing the ground plate electrically floating above the vehicle body, the distance between the ground plate and the vehicle body is increased. The antenna is characterized in that it is used as a KHz band capacitive antenna, which will be explained in detail below with reference to the illustrated embodiment.
第１図は本発明の一実施例を示す断面図で、１はフラフ
ープアンテナ、２はその地板、３は誘電体のドーム、４
は給電用同軸ケーブル、５は車両本体（例えば屋根）、
６は地板２を本体から電気的に浮かせる誘電体の支持体
、７はＦＭからＴＶ放送用に至るＭＨｚ帯域以上の同調
回路（群）、８はＡＭ放送用の同調回路である。地板２
は直径３５Ｇ程度の円板で、ドーム３表面までの高さは
３１程度である。このアンテナ１は地板２に対しプラス
チック等のサポータで支持される。FIG. 1 is a sectional view showing one embodiment of the present invention, in which 1 is a hula hoop antenna, 2 is its ground plane, 3 is a dielectric dome, and 4 is a hula hoop antenna.
5 is the power supply coaxial cable, 5 is the vehicle body (e.g. roof),
6 is a dielectric support that electrically floats the ground plate 2 from the main body; 7 is a tuning circuit (group) for frequencies above MHz ranging from FM to TV broadcasting; and 8 is a tuning circuit for AM broadcasting. Main plate 2
is a disk with a diameter of about 35G, and the height to the surface of the dome 3 is about 31. This antenna 1 is supported on a ground plate 2 by a supporter made of plastic or the like.
ＡＭ放送以外は数１０〜数１００ＭＨｚ帯であるからそ
の波長λは数ｍのオーダーである。従って、フラフープ
アンテナ１の直径りはＤユ０．２５λ／πより、数１０
〜数１００ｆｉで実現できる。Since broadcasts other than AM broadcasting range from several tens to several hundred MHz, the wavelength λ is on the order of several meters. Therefore, the diameter of the hula hoop antenna 1 is several 10 from D u 0.25λ/π.
It can be realized with ~100 fi.
第２図は共通の地板２に対向して径の異なるフラフープ
アンテナ１ａ〜ＩＣを同心円状に配設した例で、外側か
ら順にＦＭ用、ＶＨＦ−ＴＶ用、ＵＨＦ−ＴＶ用となる
。７ａ〜７Ｃはそれらの給電ケーブルであり、またＣ＋
”Ｃｉは帯域調整用の可変容量である。第１図のドーム
３内にはこれら複数のアンテナが収容され得る。FIG. 2 shows an example in which hula hoop antennas 1a to IC having different diameters are arranged concentrically facing a common ground plate 2, and these antennas are for FM, VHF-TV, and UHF-TV in order from the outside. 7a to 7C are their power supply cables, and C+
"Ci is a variable capacitor for band adjustment. A plurality of these antennas can be accommodated in the dome 3 in FIG. 1.
一方、ＡＭ用には地板２をエレメントとして車両本体５
を地板とする容量性アンテナを用いる。On the other hand, for AM, the vehicle body 5 uses the base plate 2 as an element.
A capacitive antenna with the ground plane is used.
このアンテナの性能は地板２の面積が広く、またその本
体５からの高さＨが高いほど良いが、地板２の直径が３
５ａｍあればＨ＝５ｃｍ以上で十分である。従って、地
板２から上が３ＣＩ１１程度であるから高さ８ｃｍ程度
でＡＭまでも含めた多チャネルの複合アンテナを構成で
きる。尚、第１図の同調回路の一端は同調ケーブル４の
中心導体を通してアンテナｌに接続され、他端は該ケー
ブルの外導体を通して地板２に接続される。また同調回
路８の一端は該ケーブルの外導体を通して地板２に接続
され、他端は本体５と同電位に接続される。このように
周波数帯の異なる同調回路７．８の一端が地板２で共通
になる場合は、受信回路側でそれぞれの周波数に対応し
た十分な高周波インピダンスを得る配慮が必要である。The performance of this antenna is better as the area of the ground plate 2 is wider and the height H from the main body 5 is higher, but the diameter of the ground plate 2 is 3
5 am is sufficient for H=5 cm or more. Therefore, since the height from the ground plane 2 is about 3 CI11, a multi-channel composite antenna including AM can be constructed with a height of about 8 cm. Incidentally, one end of the tuning circuit shown in FIG. 1 is connected to the antenna l through the center conductor of a tuning cable 4, and the other end is connected to the ground plane 2 through the outer conductor of the cable. Further, one end of the tuning circuit 8 is connected to the ground plate 2 through the outer conductor of the cable, and the other end is connected to the same potential as the main body 5. If one end of the tuning circuits 7 and 8 having different frequency bands is shared by the ground plane 2, consideration must be given to obtaining sufficient high frequency impedance corresponding to each frequency on the receiving circuit side.
かかる複合アンテナの設置個所は車両の屋根に限らず、
例えば自動車のスタビライザに内蔵させるようにしても
よい。The installation location of such a composite antenna is not limited to the roof of the vehicle.
For example, it may be built into the stabilizer of a car.
以上述べたように本発明によれば、ＫＨｚ帯からＭＨｚ
帯に至る多チャネルの車載用複合アンテナをコンパクト
に構成できる利点がある。As described above, according to the present invention, from the KHz band to the MHz band
This has the advantage that a multi-channel vehicle-mounted composite antenna can be constructed compactly.
第１図は本発明の一実施例を示す構成図、第２図は多重
構造のフラフープアンテナの説明図である。
図中、１．１ａ〜１ｃはフラフープアンテナ、２はその
地板、３は誘電体のドーム、４．４ａ〜４Ｃは給電ケー
ブル、５は車両本体、６は地板２の支持体である。
第１図
第２図FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a hula hoop antenna with a multiple structure. In the figure, 1.1a to 1c are hula hoop antennas, 2 is a base plate thereof, 3 is a dielectric dome, 4.4a to 4C are power supply cables, 5 is a vehicle body, and 6 is a support for the base plate 2. Figure 1 Figure 2
Claims (1)
用途に供するフラフープアンテナを配設すると共にその
周囲を誘電体のドームで覆い、且つ該地板を車両本体か
ら電気的に浮かせて配設することにより、該地板と車両
本体との間を例えばＫＨｚ帯の比較的低い周波数用の容
量性アンテナとして使用するようにしてなることを特徴
とする車載用の複合アンテナ。For example, a hula hoop antenna used for relatively high wave frequency applications in the MHz band or above is disposed facing the base plate, and its periphery is covered with a dielectric dome, and the base plate is electrically suspended from the vehicle body. 1. A composite antenna for a vehicle, characterized in that the space between the base plate and the vehicle body is used as a capacitive antenna for relatively low frequencies in the KHz band, for example.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58141629A JPS6051008A (en) | 1983-08-02 | 1983-08-02 | On-vehicle composite antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58141629A JPS6051008A (en) | 1983-08-02 | 1983-08-02 | On-vehicle composite antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6051008A true JPS6051008A (en) | 1985-03-22 |
| JPH0412045B2 JPH0412045B2 (en) | 1992-03-03 |
Family
ID=15296482
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58141629A Granted JPS6051008A (en) | 1983-08-02 | 1983-08-02 | On-vehicle composite antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6051008A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999050932A1 (en) * | 1998-03-31 | 1999-10-07 | Matsushita Electric Industrial Co., Ltd. | Antenna unit and digital television receiver |
| US6639555B1 (en) | 1998-07-02 | 2003-10-28 | Matsushita Electric Industrial Co., Ltd. | Antenna unit, communication system and digital television receiver |
| EP2186162A1 (en) * | 2007-08-13 | 2010-05-19 | EMW Co., Ltd. | Antenna of resonance frequency variable type |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514316U (en) * | 1978-07-05 | 1980-01-29 | ||
| JPS56141604A (en) * | 1980-04-05 | 1981-11-05 | Nippon Telegr & Teleph Corp <Ntt> | Microstrip antenna |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514316B2 (en) * | 1973-02-20 | 1980-04-15 |
-
1983
- 1983-08-02 JP JP58141629A patent/JPS6051008A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5514316U (en) * | 1978-07-05 | 1980-01-29 | ||
| JPS56141604A (en) * | 1980-04-05 | 1981-11-05 | Nippon Telegr & Teleph Corp <Ntt> | Microstrip antenna |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999050932A1 (en) * | 1998-03-31 | 1999-10-07 | Matsushita Electric Industrial Co., Ltd. | Antenna unit and digital television receiver |
| US6362784B1 (en) | 1998-03-31 | 2002-03-26 | Matsuda Electric Industrial Co., Ltd. | Antenna unit and digital television receiver |
| US6639555B1 (en) | 1998-07-02 | 2003-10-28 | Matsushita Electric Industrial Co., Ltd. | Antenna unit, communication system and digital television receiver |
| EP2186162A1 (en) * | 2007-08-13 | 2010-05-19 | EMW Co., Ltd. | Antenna of resonance frequency variable type |
| JP2010536304A (en) * | 2007-08-13 | 2010-11-25 | イーエムダブリュ カンパニー リミテッド | Resonant frequency variable antenna |
| EP2186162A4 (en) * | 2007-08-13 | 2011-05-25 | Emw Co Ltd | Antenna of resonance frequency variable type |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0412045B2 (en) | 1992-03-03 |
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