JPS6149502A - Antenna for automobile - Google Patents

Antenna for automobile

Info

Publication number
JPS6149502A
JPS6149502A JP59171374A JP17137484A JPS6149502A JP S6149502 A JPS6149502 A JP S6149502A JP 59171374 A JP59171374 A JP 59171374A JP 17137484 A JP17137484 A JP 17137484A JP S6149502 A JPS6149502 A JP S6149502A
Authority
JP
Japan
Prior art keywords
antenna
radio
approximately
frequency band
personal
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.)
Pending
Application number
JP59171374A
Other languages
Japanese (ja)
Inventor
Toru Kamiya
徹 神谷
Takashi Sakurai
桜井 孝
Hiroshi Sugimoto
杉本 寛志
Takeo Kawai
健夫 川合
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Denso Corp
Original Assignee
NipponDenso Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NipponDenso Co Ltd filed Critical NipponDenso Co Ltd
Priority to JP59171374A priority Critical patent/JPS6149502A/en
Publication of JPS6149502A publication Critical patent/JPS6149502A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q9/00Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
    • H01Q9/04Resonant antennas
    • H01Q9/30Resonant antennas with feed to end of elongated active element, e.g. unipole
    • H01Q9/32Vertical arrangement of element
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q5/00Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
    • H01Q5/30Arrangements for providing operation on different wavebands
    • H01Q5/307Individual or coupled radiating elements, each element being fed in an unspecified way
    • H01Q5/314Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
    • H01Q5/321Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors within a radiating element or between connected radiating elements

Landscapes

  • Details Of Aerials (AREA)

Abstract

PURPOSE:To allow one antenna to be shared and to prevent the number of antenna elements from increasing by operating the antenna as a Franklin antenna and a rod antenna for different frequency ranges. CONSTITUTION:Antenna elements 1 operate as a 4-stage stack Franklin antenna for a frequency band of personal radio and also operates as a rod antenna for a frequency range of FM radio broadcasting because the overall length is a quarter as long as that for FM radio broadcasting. The phase composition coil 1c of the elements 1 is necessary for the Franklin antenna for personal radio and not necessary for the rod antenna for FM radio broadcasting, but the mean wavelength of FM radio broadcasting is >=10 times as long as the mean wavelength of personal radio transmission and the coil 1c exerts no evil influence upon the reception of FM radio broadcasting. Therefore, the elements 1 has a sufficient gain as the rod antenna for FM radio broadcasting.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、主に自動車上でラジオ放送の受信や無線の送
受信等に用いられる自動車用アンテナに関するものであ
る。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automotive antenna used mainly for receiving radio broadcasts, transmitting and receiving radio signals, etc. on a vehicle.

(従来の技術) 近年、パーソナル無線と呼ばれる使用周波数帯域が90
3〜905 MHzの車載用の小型無線機が普及してき
たために、このパーソナル無mを搭載した自動車におい
ては、第4図に示すようにAM/FMラジオ用アにテナ
11とパーソナル無線用アンテナ1202本のアンテナ
を車体に設置している。通常、A M / F Mラジ
オ用アンテナ11としては第5図(a)に示すような長
さ90〜110鑞程度のロンドアンテナが用い、またパ
ーソナル無性用アンテナ12としては第5図(b)に示
すように約1/4波長の直線導体の先端に2本の約1/
2波長の直線導体を約1/2波長に相当する位相合成コ
イルをそれぞれ介して直線的に連設した長さ70cIf
L程度(23cIrL+ 3crL+ 25c1n+ 
3crL+ 13函十基台)の3段スタックのフランク
リンアンテナを用いている。しかし、これらのアンテナ
は設置時に車体から長く突出するために、自動洗車機に
よる洗車時や車庫入れ時等にアンテナを収納したり車体
から取り外したりする必要がある。このため、アンテナ
の本数が増えると上記のような手間が増す等の理由から
、A M / F Mラジオとパーソナル無線との両者
に適用し得る自動車用アンテナの出現が望まれている。
(Prior art) In recent years, the frequency band used by personal wireless has increased to 90.
As small in-vehicle radio devices with a frequency of 3 to 905 MHz have become popular, cars equipped with this personal radio are equipped with a antenna 11 for AM/FM radio and an antenna 1202 for personal radio, as shown in FIG. A book antenna is installed on the car body. Usually, as the AM/FM radio antenna 11, a Rondo antenna with a length of about 90 to 110 mm as shown in FIG. 5(a) is used, and as the personal asexual antenna 12, as shown in FIG. ), two approximately 1/4 wavelength straight conductors are connected at the tip of approximately 1/4 wavelength straight conductor.
A length of 70 cIf in which straight conductors of two wavelengths are connected linearly via phase synthesis coils corresponding to approximately 1/2 wavelength.
About L (23cIrL+ 3crL+ 25c1n+
A three-stage stack of Franklin antennas of 3crL+13 boxes and 10 bases is used. However, since these antennas protrude long from the vehicle body when installed, it is necessary to store the antennas or remove them from the vehicle body when washing the vehicle in an automatic car wash or parking the vehicle in a garage. For this reason, as the number of antennas increases, the above-mentioned time and effort increases, and therefore, it is desired to develop an antenna for automobiles that can be applied to both AM/FM radio and personal radio.

そこで従来、ホーン形空中線の導波管外枠を同軸内導体
とする同軸線路を形成し、このホーン形空中線の開口部
外枠を放射素子として前記同軸線路と結合するコーン形
空中線等のモノボール空中線を形成することにより、一
体化した空中線で2つの異なる周波数帯域で動作するこ
とができる空中線(特開昭57−168506号公報参
照)が提案されているが、このような空中線では、自動
車用アンテナとして車体外部に取り付けてラジオ放送の
受信やパーソナル無線の送受信等に用いるには、周波数
帯域等の動作特性および構造上の問題から不適尚である
Therefore, in the past, a monoball such as a cone-shaped antenna was formed, in which a coaxial line was formed using the waveguide outer frame of a horn-shaped antenna as a coaxial inner conductor, and the opening outer frame of the horn-shaped antenna was used as a radiating element to be coupled to the coaxial line. An antenna has been proposed that can operate in two different frequency bands with an integrated antenna by forming an antenna (see Japanese Patent Application Laid-open No. 168506/1983). It is unsuitable to be attached to the outside of a vehicle as an antenna and used for receiving radio broadcasts, transmitting and receiving personal radios, etc. due to operating characteristics such as frequency bands and structural problems.

(発明が解決しようとする問題点) 上記のように、従来の自動車用アンテナは、AM/FM
ラジオ用のアンテナとパーソナル無線用のアンテナとは
別々に設けられており、また従来提案されている一体化
した構成て2つの異なる周波数帯域で動作する空中線は
、自動車用アンテナとして適さないことから、本発明で
は、1本で例えばA M / F Mラジオとパーソナ
ル無線というように2つの異なる周波数帯域で動作する
ことができる自動車用アンテナを提供することにより、
パーソナル無線の搭載に伴う自動車用アンテナの本数の
増加を防ぎ、洗車時および車庫入れ時等のアンテナ脱着
の手間を軽減しようとするものである。
(Problems to be Solved by the Invention) As mentioned above, the conventional automobile antenna
Radio antennas and personal wireless antennas are provided separately, and the previously proposed integrated antennas that operate in two different frequency bands are not suitable as automotive antennas. The present invention provides a single automotive antenna that can operate in two different frequency bands, for example AM/FM radio and personal radio.
The purpose is to prevent an increase in the number of automobile antennas due to the installation of personal radios, and to reduce the trouble of attaching and detaching antennas when washing the car or parking it in the garage.

(問題点を解決するための手段) 上記問題点を解決するために、本発明は、第1の周波数
帯域の略平均波長の略1/4の長さの′iP; 1の直
線導体の先端に、第1の周波数帯域の略平均波長の略1
/2の長さの複数個の第2の直線導体を、第1および第
2の直線導体間ならびに第2の直線導体間に第1の周波
数帯域の略平均波長の略1/2に相当するう回路をそれ
ぞれ介して連設し、その全長を第2の周波数帯域の略平
均波長の略1/4としたアンテナ素子’kW成し、この
アンテナ素子を自動車の金属ボディをアースとして車体
上に設置してそのアンテナ出力を分波器により第1およ
び第2の周波数帯域に分離して出力することにより、上
記のアンテナ素子を第1の周波数帯域に対しては複数段
のフランクリンアンテナとして動作させ、かつ第2の周
波数帯域に対しては1本のロンドアンテナとして動作さ
せて、1本で2つの異なる周波数帯域で動作する自動車
用アンテナを構成するものである。
(Means for Solving the Problems) In order to solve the above problems, the present invention provides a tip of a straight conductor having a length of approximately 1/4 of the approximately average wavelength of the first frequency band. , approximately 1 of the approximately average wavelength of the first frequency band
/2 length of the plurality of second straight conductors between the first and second straight conductors and between the second straight conductors corresponding to approximately 1/2 of the approximately average wavelength of the first frequency band. Antenna elements with a total length of approximately 1/4 of the average wavelength of the second frequency band are connected via respective detour circuits, and this antenna element is connected to the car body with the metal body of the car as ground. By installing the antenna and separating the output into the first and second frequency bands using a splitter and outputting the antenna, the antenna element can be operated as a multi-stage Franklin antenna for the first frequency band. , and operates as a single Rondo antenna for the second frequency band, thereby configuring a single automotive antenna that operates in two different frequency bands.

(実施例) 以下、図面によυ本発明の実施例を詳細に説明するO 第1図は、本発明の一実施例の構成を示す図である。第
1図において、1はパーソナル無線の使用周波数帯域に
おける平均波長(約0.33m)に対して、約6/8波
長の長さの金属ロッド1aの先端に約5/8波長の長さ
の6本の金属ロッド1b6、各金属ロンド間に約1/2
波長に相当するう回路として位相合成コイル1Cをそれ
ぞれ介して連結し、その全長’ij5FMラジオ放送の
使用周波数帯域における平均波長(約s、61m)に対
して約1/4波長とした4段スタック(例えば、前述の
3段の長さにコイル部分3crrLと1素子分23ぼを
加えた長さを有する)のアンテナ素子である。このアン
テナ素子1の最下段となる金属ロッド1aの下部には、
金属ロッド1aを中心として細く上方に延びたおねじ部
を有する樹脂製のステー2が金B30ンド1aの一部を
埋設して固設され、このステー2とそのおねじ部に螺合
するナツト6により第2図にも示すように取付金具4の
孔を挿通させたアンテナ素子1が取付金具4に立植され
固定されている。取付金具4は自動車のトランクリッド
等に着脱自在に取り付けることができる周知のもので、
この取付金具4が自動車の金属ボディ5に取り付けられ
てアンテナ素子1が自動車の車体に立設されている。そ
して、金属ロッド1aの下端部に同軸線6の中心導体6
aが半田付は等により接続され、かつ自動車の金属ボデ
ィ5と電気的に接続する取付金具4に同軸線6の外導体
6bが半田付は等により接続されて、アンテナ素子1お
よびアースとなる金属ボディ5が同軸線6によ9分波器
7の入力側に電気的に接続されている。また分波器7の
出力側にはパーンナル無線機8とA M / F Mラ
ジオ受信機9とがそれぞれ同軸線により接続されている
。なお、第1図中の10は、金属ロッド1aと同軸線6
の中心導体6aとの接合部および取付金具・4と同軸f
eL6の外導体6bとの接合部を保護するための樹脂カ
バーである。
(Example) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Fig. 1 is a diagram showing the configuration of an embodiment of the present invention. In Fig. 1, 1 is a metal rod 1a with a length of about 5/8 wavelength at the tip of a metal rod 1a having a length of about 6/8 wavelength with respect to the average wavelength (about 0.33 m) in the frequency band used by personal radio. 6 metal rods 1b6, approximately 1/2 between each metal rod
A 4-stage stack connected through each phase synthesis coil 1C as a detour circuit corresponding to the wavelength, and whose total length is approximately 1/4 wavelength with respect to the average wavelength (approximately s, 61 m) in the frequency band used for ij5FM radio broadcasting. (For example, the antenna element has a length equal to the length of the three stages described above plus the coil portion 3crrL and one element length of 23cm). At the bottom of the metal rod 1a, which is the lowest stage of the antenna element 1, there is a
A resin stay 2 having a male thread extending thinly upward around a metal rod 1a is fixed by embedding a part of gold B30 node 1a, and a nut is screwed into this stay 2 and the male thread. As shown in FIG. 2, the antenna element 1 inserted through the hole of the mounting bracket 4 is erected and fixed on the mounting bracket 4 by 6. The mounting bracket 4 is a well-known type that can be detachably attached to the trunk lid of a car, etc.
This mounting bracket 4 is attached to a metal body 5 of an automobile, and the antenna element 1 is erected on the automobile body. A center conductor 6 of the coaxial line 6 is attached to the lower end of the metal rod 1a.
a is connected by soldering, etc., and the outer conductor 6b of the coaxial line 6 is connected by soldering, etc. to the mounting bracket 4 which is electrically connected to the metal body 5 of the automobile, and becomes the antenna element 1 and the ground. A metal body 5 is electrically connected to the input side of a duplexer 7 through a coaxial line 6. Further, a perrnall radio device 8 and an AM/FM radio receiver 9 are connected to the output side of the duplexer 7 through coaxial lines, respectively. Note that 10 in FIG. 1 indicates the metal rod 1a and the coaxial line 6.
The joint with the center conductor 6a and the mounting bracket 4 and the coaxial f
This is a resin cover for protecting the joint part of eL6 with the outer conductor 6b.

上記の構成において、アンテナ素子1は、パーソナル無
線の周波数帯域に対して4段スタックのフランクリンア
ンテナとして動作することは明白であるが、その全長が
FMラジオ放送の約1/4波長(約90鋼)であること
からFMラジオ放送の周波数帯域に対してロンドアンテ
ナとして動作することができる。即ち、アンテナ素子1
の位相合成コイル1Cは、パーソナル無線用のフランク
リンアンテナとしては必要なものであるが、FMラジオ
用のロンドアンテナとしては不要なものである。しかし
ながら、FMラジオ放送の平均波長は、パーソナル無線
の平均波長の10倍以上であり、パーソナル無線の平均
波長の約1/2に相当する位相合成コイル1Cに対ルて
十分に長いため、位相合成コイル1CはFMラジオ放送
の周波数帯域に対してはロンドアンテナの一部としてそ
の高さ分の意味しかなく、FMラジオ放送の受信に何ら
悪影響を及ばずことがない。従って、アンテナ素子1・
はFMラジオ用のロンドアンテナとしても十分な利得が
得られる。ここで、本実施例のアンテナ素子1と第4図
および第5図に示す従来のAM/FMラジオ用アンテナ
11お工びパーソナル無線用アンテナ12とを用いてF
Mラジオ放送の周波数帯域における受信電圧を実際に計
測した結果を第3図に示す。第3図からも明らかなよう
に、本実施例のアンテナ素子1はFMラジオ用のアンテ
ナとして従来のA M / F Mラジオ用アンテナ1
1と同等の性能を有している。また、アンテナ素子1の
全長はFMラジオ放送の平均波長に対して決定されてい
るが、周知の如<FMラジオ用のアンテナとAMラジオ
用のアンテナは兼用でき、かつAMラジオ放送の平均波
長はFMラジオ放送の平均波長よりもさらに長く位相合
成コイル1cの影響がないので、アンテナ素子1は、A
M?ジオ放送も良好に受信することができる。
In the above configuration, it is clear that the antenna element 1 operates as a four-tier stacked Franklin antenna for the frequency band of personal radio. ), it can operate as a rondo antenna for the frequency band of FM radio broadcasting. That is, antenna element 1
The phase synthesis coil 1C is necessary as a Franklin antenna for personal radio, but unnecessary as a Rondo antenna for FM radio. However, the average wavelength of FM radio broadcasting is more than 10 times the average wavelength of personal radio, and is long enough for the phase synthesis coil 1C, which corresponds to about 1/2 of the average wavelength of personal radio, so phase synthesis For the frequency band of FM radio broadcasting, the coil 1C has only the meaning of its height as a part of the Rondo antenna, and does not have any adverse effect on the reception of FM radio broadcasting. Therefore, antenna element 1.
can provide sufficient gain as a Rondo antenna for FM radio. Here, using the antenna element 1 of this embodiment and the conventional AM/FM radio antenna 11 and personal radio antenna 12 shown in FIGS.
FIG. 3 shows the results of actually measuring the received voltage in the frequency band of M radio broadcasting. As is clear from FIG. 3, the antenna element 1 of this embodiment is similar to the conventional AM/FM radio antenna 1 as an FM radio antenna.
It has the same performance as 1. Further, the total length of the antenna element 1 is determined based on the average wavelength of FM radio broadcasting, but as is well known, the antenna for FM radio and the antenna for AM radio can be used together, and the average wavelength of AM radio broadcasting is Since there is no influence of the phase synthesis coil 1c for a longer period than the average wavelength of FM radio broadcasting, the antenna element 1
M? Geo broadcasts can also be received well.

このように、アンテナ素子1はパーソナル無線とA M
 / F Mラジオ放送の画周波数帯域において動作す
るため、アンテナ素子1からの出力は前記画周波数帯域
の信号を混合したものになることがら、このアンテナ出
力を分波器7にエリ各周波数帯域に分離した後、パーソ
ナル無線機8およびAM/ F Mラジオ受信機9にそ
れぞれ供給している。
In this way, the antenna element 1 is connected to the personal radio and the A.M.
/ Since it operates in the image frequency band of FM radio broadcasting, the output from the antenna element 1 is a mixture of signals in the image frequency band. After being separated, it is supplied to a personal radio device 8 and an AM/FM radio receiver 9, respectively.

なお、実施例では、アンテナ素子1の金属ロッド1aお
裏び1bの長さをそれぞれ約6/8波長および約5/8
波長として、基本フランクリンアンテナの寸法からやや
外して設定して最大利得を得ている。これは社団法人日
本電子機械工業会で洩定したパーソナル無線用アンテナ
の利得限界7.14dBを満たすためである。即ち、上
記の利得限界7.14dBは3段スタックのフランクリ
ンアンテナの利得から決定されているもので、前記実施
例のようにスタック段数を4段以上にするとこの利得限
界を超えることから、各段における位相関係を最適にせ
ずに利得を落としている。
In the embodiment, the lengths of the metal rods 1a and 1b of the antenna element 1 are approximately 6/8 wavelength and approximately 5/8 wavelength, respectively.
The maximum gain is obtained by setting the wavelength slightly outside the dimensions of the basic Franklin antenna. This is to satisfy the gain limit of 7.14 dB for personal wireless antennas specified by the Japan Electronics Industry Association. That is, the above gain limit of 7.14 dB is determined from the gain of the three-stage stacked Franklin antenna, and since this gain limit is exceeded when the number of stack stages is four or more as in the above embodiment, each stage is The gain is reduced without optimizing the phase relationship between the two.

また、前記実施例では、位相合成コイル1ci用いてア
ンテナ素子1を構成したが、これは所定の波長の約1/
2波長に相当するう回路であれ−ばよく、ジグザグ形や
折り返し形のものでもよい。
Further, in the above embodiment, the antenna element 1 was constructed using 1ci of phase synthesis coils, but this is approximately 1/1 of the predetermined wavelength.
It only needs to be a detour circuit corresponding to two wavelengths, and may be of a zigzag shape or a folded shape.

なお、実施例としてパーソナル無線とA M/F Mラ
ジオの画周波数帯域で動作する自動車用アンテナについ
て説明したが、他の異なる2つの周波数帯域で動作する
ものも同様に構成することができ、その場合、アンテナ
素子全ロッドアンテナとして使用する低い周波数帯域の
平均波長が、高い周波数帯域の平均波長に基づいて構成
されるフランクリンアンテナの約1/2波長に相当する
う回路をその高さ分の直線導体として見なせる適度に十
分に長くなるように画周波数帯域を設定する必侠がある
0 (発明の効果) 以上説明したように、本発明は、第1の周波数帯域の略
平均波長の略1/4の長さの第1の直線導体の先端に、
第1の周波数帯域の略平均波長の略1/2の長さの複数
個の第2の直線導体を、第1および第2の直線導体間な
らびに第2の直線導体間に第1の周波数帯域の略平均波
長の略1/2に相当するう回路をそれぞれ介して連設し
、その全長を第2の周波数帯域の略平均波長の略1/4
としたアンテナ素子を具えたことにより、巣1の周波数
帯域に対しては前記アンテナ素子がフランクリンアンテ
ナとして動作し、第2の周波数帯域に対しては前記アン
テナがロンドアンテナとして動作することから、1本で
2つの異なる周波数帯域で動作する自動車用アンテナを
構成することができ、パーソナル無線機の搭載に伴う自
動車用アンテナの本数の増加を防止することができる等
の効果を有するものである。
Although we have described an automotive antenna that operates in the frequency bands of personal radio and AM/FM radio as an example, antennas that operate in two other different frequency bands can be constructed in the same way. In this case, the average wavelength of the low frequency band used as an antenna element as an all-rod antenna is equivalent to approximately 1/2 wavelength of a Franklin antenna constructed based on the average wavelength of the high frequency band. It is necessary to set the image frequency band so that it is reasonably long enough to be considered as a conductor. At the tip of the first straight conductor with a length of 4,
A plurality of second straight conductors having a length of approximately 1/2 of the approximately average wavelength of the first frequency band are connected between the first and second straight conductors and between the second straight conductors in the first frequency band. are connected via detour circuits corresponding to approximately 1/2 of the approximately average wavelength of the second frequency band, and the total length thereof is approximately 1/4 of the approximately average wavelength of the second frequency band.
By providing the antenna element 1, the antenna element operates as a Franklin antenna for the nest 1 frequency band, and as a Rondo antenna for the second frequency band. It is possible to construct a car antenna that operates in two different frequency bands using the present invention, and has the advantage of being able to prevent an increase in the number of car antennas due to the installation of personal radio equipment.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明の一実施例の構成を示す図、第2図は
、本発明の一実施例の要部斜視図、第5図は、本発明の
一実施例と従来のA M / F ’M用シラジオ用ア
ンテナよびパーソナル無線用アンテナの動作特性を示す
図、第4図および第5図は、従来の自動車用アンテナを
示す図である。 1・・・アンテナ素子、1a、1b+1・−金hiロッ
ド、1c11@拳位相合成コイル、2@−・ステー、3
・・・ナツト、4・・・取付金具、5−・・金属ボディ
、6・・・同軸紗、7・・・分波器、8・・・パーソナ
ル無線機、?・・・AM/FMラジオ受信機。
FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, FIG. 2 is a perspective view of essential parts of an embodiment of the present invention, and FIG. 5 is a diagram showing the configuration of an embodiment of the present invention and a conventional A M Figures 4 and 5, which show the operating characteristics of the radio antenna for F'M and the antenna for personal radio, are diagrams showing conventional antennas for automobiles. 1...Antenna element, 1a, 1b+1-gold hi rod, 1c11@fist phase synthesis coil, 2@-stay, 3
... Nut, 4... Mounting bracket, 5-... Metal body, 6... Coaxial gauze, 7... Duplexer, 8... Personal radio, ? ...AM/FM radio receiver.

Claims (2)

【特許請求の範囲】[Claims] (1)第1の周波数帯域の略平均波長の略1/4の長さ
の第1の直線導体の先端に、第1の周波数帯域の略平均
波長の略1/2の長さの複数の第2の直線導体を、前記
第1および第2の直線導体間ならびに第2の直線導体間
に第1の周波数帯域の略平均波長の略1/2に相当する
う回路をそれぞれ介在させて連設し、その全長を第2の
周波数帯域の平均波長の略1/4としたアンテナ素子を
具えたことを特徴とする自動車用アンテナ。
(1) A plurality of conductors each having a length of approximately 1/2 of the approximately average wavelength of the first frequency band are attached to the tip of the first straight conductor having a length of approximately 1/4 of the approximately average wavelength of the first frequency band. A second straight conductor is connected by interposing a circuit corresponding to approximately 1/2 of the average wavelength of the first frequency band between the first and second straight conductors and between the second straight conductor. An antenna for an automobile, comprising: an antenna element having a total length approximately 1/4 of the average wavelength of a second frequency band.
(2)アンテナ出力を分波器により第1および第2の周
波数帯域に分離することを特徴とする特許請求の範囲第
1項記載の自動車用アンテナ。
(2) The automobile antenna according to claim 1, wherein the antenna output is separated into first and second frequency bands by a duplexer.
JP59171374A 1984-08-17 1984-08-17 Antenna for automobile Pending JPS6149502A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59171374A JPS6149502A (en) 1984-08-17 1984-08-17 Antenna for automobile

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59171374A JPS6149502A (en) 1984-08-17 1984-08-17 Antenna for automobile

Publications (1)

Publication Number Publication Date
JPS6149502A true JPS6149502A (en) 1986-03-11

Family

ID=15921995

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59171374A Pending JPS6149502A (en) 1984-08-17 1984-08-17 Antenna for automobile

Country Status (1)

Country Link
JP (1) JPS6149502A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6454906A (en) * 1987-08-26 1989-03-02 Yahata Denki Sangyo Kk Reception antenna
EP0348054A2 (en) * 1988-06-03 1989-12-27 Alliance Research Corporation Mobile communications antenna
JPH0219004A (en) * 1988-07-07 1990-01-23 Harada Ind Co Ltd On-vehicle three wave common use antenna
US5451967A (en) * 1993-03-31 1995-09-19 Nippon Antenna Company Limited Roof antenna with improved casing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6454906A (en) * 1987-08-26 1989-03-02 Yahata Denki Sangyo Kk Reception antenna
EP0348054A2 (en) * 1988-06-03 1989-12-27 Alliance Research Corporation Mobile communications antenna
JPH0219004A (en) * 1988-07-07 1990-01-23 Harada Ind Co Ltd On-vehicle three wave common use antenna
US5451967A (en) * 1993-03-31 1995-09-19 Nippon Antenna Company Limited Roof antenna with improved casing

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