JPH042486Y2 - - Google Patents
Info
- Publication number
- JPH042486Y2 JPH042486Y2 JP19789886U JP19789886U JPH042486Y2 JP H042486 Y2 JPH042486 Y2 JP H042486Y2 JP 19789886 U JP19789886 U JP 19789886U JP 19789886 U JP19789886 U JP 19789886U JP H042486 Y2 JPH042486 Y2 JP H042486Y2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- antenna
- connecting fitting
- capacitive element
- rod
- 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
Links
- 239000004020 conductor Substances 0.000 claims description 22
- 239000012212 insulator Substances 0.000 claims description 5
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Landscapes
- Details Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案はコードレステレホンや自動車電話等の
双方向通信において使用される送信周波数と受信
周波数とが互いに異なり、これを１本のアンテナ
で給電するようにしたマルチバンドホイツプアン
テナに関する。[Detailed description of the invention] [Industrial application field] This invention uses two-way communication such as cordless telephones and car phones, where the transmitting frequency and receiving frequency are different from each other, and this is powered by a single antenna. This invention relates to a multi-band whip antenna.
従来この種のマルチバンドアンテナとしては、
第３図に示す様なものがある。
Conventionally, this type of multiband antenna is
There is something like the one shown in Figure 3.
図において、アンテナ１０は接栓１１の信号接
続導体１２にコイルエレメント１３の基端が固定
され、このエレメント１３の中心軸上に絶縁被覆
された棒状導体１４が配設され、その基端が信号
接続導体１２に固定されている。そして、エレメ
ント１３の外周は絶縁物からなるチユーブ１５が
被せられ、更に上端に絶縁キヤツプ１６が被せら
れている。なお、コイルエレメント１３と棒状導
体１４及びチユーブ１５は弾性を有し、アンテナ
全体は弾性変形可能に構成されている。かかる構
成において、コイルエレメント１３と棒状導体１
４は、それぞれ異なる共振周波数を備えており、
２つの共振周波数、即ちマルチバンドアンテナを
構成している。 In the figure, in the antenna 10, the base end of a coil element 13 is fixed to a signal connection conductor 12 of a plug 11, and an insulated rod-shaped conductor 14 is disposed on the central axis of this element 13, and the base end is connected to a signal connection conductor 12 of a plug 11. It is fixed to the connecting conductor 12. The outer periphery of the element 13 is covered with a tube 15 made of an insulating material, and the upper end is further covered with an insulating cap 16. Note that the coil element 13, rod-shaped conductor 14, and tube 15 have elasticity, and the entire antenna is configured to be elastically deformable. In such a configuration, the coil element 13 and the rod-shaped conductor 1
4 have different resonant frequencies,
It has two resonant frequencies, ie, constitutes a multiband antenna.
ところが、コードレステレホンや自動車電話用
では、送信周波数と受信周波数とが、わずかに相
違して設定される必要があるが、従来のアンテナ
ではこの設定が難しい。
However, for cordless telephones and car phones, it is necessary to set the transmitting frequency and receiving frequency to be slightly different, which is difficult to do with conventional antennas.
即ち、通常はコイルエレメント１３の長さl1と
棒状導体１４の長さl2とはl1≧l2に設定されてい
る。そして、一方のコイルエレメント１３が螺旋
状であるのに対して、他方の棒状導体１４は直線
状であり、双方の電気長は大巾に相違する。この
結果、例えばコイルエレメント１３を144MHzの
共振周波数に設定した場合、棒状導体１４は
430MHzの共振周波数となり、２つの周波数を接
近して設定することが出来ない。従つて、コード
レステレホンや自動車電話用としては適していな
かつた。また、従来のアンテナの棒状導体１４の
上端部は、自由端であつてコイルエレメント１３
に固定されていない。このため、アンテナに外力
が加わるとエレメントは弾性変形し、棒状導体１
４はコイルエレメント１３の中心軸上からずれ、
棒状導体１４とコイルエレメント１３間に存在す
る浮遊容量が変化する。従つて、共振周波数が変
動し易く、不安定であつた。又、アンテナ全体が
同軸導体から成つているので全体に太く構成せざ
るを得ず、ハンデイ機器用のアンテナなどに対し
ては、アンテナのみ太く強調され見苦しく、かつ
使いにくい点がある。 That is, normally the length l 1 of the coil element 13 and the length l 2 of the rod-shaped conductor 14 are set to satisfy l 1 ≧l 2 . While one coil element 13 has a spiral shape, the other rod-shaped conductor 14 has a straight shape, and the electrical lengths of both are greatly different. As a result, for example, when the coil element 13 is set to a resonant frequency of 144MHz, the rod-shaped conductor 14
The resonance frequency is 430MHz, and two frequencies cannot be set close to each other. Therefore, it was not suitable for cordless telephones or car telephones. Further, the upper end of the rod-shaped conductor 14 of the conventional antenna is a free end, and the coil element 13
is not fixed. Therefore, when an external force is applied to the antenna, the element deforms elastically, and the rod-shaped conductor 1
4 is offset from the center axis of the coil element 13,
The stray capacitance existing between the rod-shaped conductor 14 and the coil element 13 changes. Therefore, the resonance frequency easily fluctuated and was unstable. In addition, since the entire antenna is made of a coaxial conductor, it has to be made thick as a whole, and for antennas for handheld devices, only the antenna is emphasized as being thick, making it unsightly and difficult to use.
よつてアンテナ自体はよりスリムなものが望ま
しく、またフレキシブル性を有しないアンテナ、
例えば過に公知のロツドアンテナのスリムな形状
であつて前記問題点が解決された製品であれば、
取付ける機器によつては、要望されるという多様
性も必要である。 Therefore, it is desirable that the antenna itself be slimmer, and antennas that are not flexible,
For example, if the product is a slim shape of a well-known rod antenna and solves the above problems,
Depending on the equipment to be installed, it is also necessary to have the desired versatility.
本考案は上気した問題点に鑑み成されたもので
あり、近接した送信周波数及び受信周波数に対し
ても容量変化等が生じることなく電気的に安定し
た動作が得られ、また必要周波数に対して高精度
で製造できるマルチバンドホイツプアンテナを提
供するものである。
The present invention was developed in view of the above-mentioned problems, and it provides electrically stable operation without any capacitance change even at close transmitting and receiving frequencies, and is capable of achieving stable operation at the required frequency. The present invention provides a multi-band whip antenna that can be manufactured with high precision.
本考案のマルチバンドホイツプアンテナは、ア
ンテナエレメントの先端に嵌合する筒状の導電性
接続金具と、該接続金具に中心導体が電気的に接
続され、該中心導体の周囲を弾性絶縁体で被覆し
た棒状の容量素子部材と、該容量素子部材の周囲
に同軸的に配設しその下部が前記接続金具と電気
的に接続するコイルと、該コイルを保持する螺旋
溝を内面に形成し基部が前記接続金具と嵌合して
保持される絶縁性キヤツプとを備え、前記容量素
子部材とコイルによるトラツプ回路を絶縁性キヤ
ツプ内に構成したものである。 The multi-band whip antenna of the present invention includes a cylindrical conductive connecting fitting that fits into the tip of the antenna element, a center conductor electrically connected to the connecting fitting, and an elastic insulator surrounding the center conductor. A rod-shaped capacitive element member coated with a capacitive element member, a coil coaxially arranged around the capacitive element member and whose lower part is electrically connected to the connecting fitting, and a spiral groove for holding the coil formed on the inner surface. The cap includes an insulating cap whose base part is fitted and held by the connecting fitting, and a trap circuit including the capacitive element member and the coil is constructed within the insulating cap.
上記手段において、容量素子部材は接続金具を
介してアンテナエレメントに直列接続される。ま
たコイルも前記接続金具を介してアンテナエレメ
ントに直列接続され、容量素子部材とコイルの並
列回路によるトラツプ回路が構成される。前記コ
イルは絶縁性キヤツプの螺旋溝に嵌合し、所定ピ
ツチで保持される。
In the above means, the capacitive element member is connected in series to the antenna element via the connecting fitting. Further, the coil is also connected in series to the antenna element via the connecting fitting, and a trap circuit is formed by a parallel circuit of the capacitive element member and the coil. The coil fits into the spiral groove of the insulating cap and is held at a predetermined pitch.
以下本考案の実施例を図面と共に説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第１図において、アンテナエレメント１は導電
性の金属パイプを従来公知の伸縮手段により構成
されている。ただし、不使用時にアンテナエレメ
ントを短縮する必要がなければ単一の金属パイプ
でもよい。導電性の接続金具２は中間の径大部２
ａ、その上下に径小部２ｂ，２ｃを有し、中心に
貫通孔２ｄを設けている。下方の径小部２ｃはア
ンテナエレメント１の上側から嵌合されている。
容量素子部材３は棒状の同軸ケーブルの外周の編
素線を取り除き、中心導体３ａとその周囲に被覆
した太径の弾性絶縁体３ｂとで構成され、弾性絶
縁体３ｂ内の中心導体３ａは突出した下方が接続
金具２の貫通孔２ｄに嵌挿され、接続金具２の下
側の径小部２ｃに突出して該接続金具体２と半田
付される。コイル４はその下部が接続金具２の上
側径小部２ｂの周囲に巻回され、半田付により接
続金具２と固定及び電気的接続を行う。キヤツプ
５はABS等の絶縁性樹脂から構成され、その内
面は下端を除いて一定ピツチで螺旋溝５ａが穿設
されている。該キヤツプ５は上端が閉塞され、下
端が開放された筒体であり、下端が接続金具２の
径大部２ａ及びアンテナエレメント１に嵌合さ
れ、螺旋溝５ａのピツチにコイル４が螺合してコ
イル４を所定ピツチで保持している。 In FIG. 1, an antenna element 1 is constructed of a conductive metal pipe using conventionally known expansion and contraction means. However, if there is no need to shorten the antenna element when not in use, a single metal pipe may be used. The conductive connecting fitting 2 is the middle large diameter part 2
a, it has small diameter portions 2b and 2c above and below, and a through hole 2d is provided in the center. The lower small diameter portion 2c is fitted into the antenna element 1 from above.
The capacitive element member 3 is made by removing the knitted wire from the outer periphery of a rod-shaped coaxial cable, and is composed of a central conductor 3a and a large-diameter elastic insulator 3b coated around the central conductor 3a, with the central conductor 3a inside the elastic insulator 3b protruding. The lower part thereof is inserted into the through hole 2d of the connection fitting 2, protrudes from the small diameter portion 2c on the lower side of the connection fitting 2, and is soldered to the connection fitting 2. The lower part of the coil 4 is wound around the upper small diameter portion 2b of the connecting fitting 2, and is fixed and electrically connected to the connecting fitting 2 by soldering. The cap 5 is made of an insulating resin such as ABS, and has spiral grooves 5a formed at a constant pitch on its inner surface except for the lower end. The cap 5 is a cylindrical body whose upper end is closed and whose lower end is open. The coil 4 is held at a predetermined pitch.
以上より、第２図等価回路に示す如く、容量素
子部材３とコイル４とは各々アンテナエレメント
１に直列接続され、各々は並列回路となつてトラ
ツプ回路６を構成している。該トラツプ回路６の
コイル４によりアンテナの共振波長を電気的に長
くし、容量素子部材３により共振波長を電気的に
短くする。この各々の共振波長を送受の周波数に
対応させることにより、互いに異なる送受周波数
を給電することができ、マルチバンド化が図れ
る。 From the above, as shown in the equivalent circuit of FIG. 2, the capacitive element member 3 and the coil 4 are each connected in series to the antenna element 1, and each constitutes a trap circuit 6 as a parallel circuit. The coil 4 of the trap circuit 6 electrically lengthens the resonant wavelength of the antenna, and the capacitive element member 3 electrically shortens the resonant wavelength. By making each of these resonant wavelengths correspond to the transmitting and receiving frequencies, it is possible to supply power at mutually different transmitting and receiving frequencies, and multi-band operation can be achieved.
次に上記構成において、製造工程について説明
する。 Next, the manufacturing process for the above configuration will be explained.
まず、接続金具２に容量素子３を立て、中心導
体３ａを貫通孔２ｄに通してその突出部を半田等
で接続金具２に接続する。 First, the capacitive element 3 is erected on the connection fitting 2, the center conductor 3a is passed through the through hole 2d, and its protrusion is connected to the connection fitting 2 with solder or the like.
次に、あらかじめスペース巻きされたコイル４
の下端の密着巻部を接続金具２の上側径小部２ｂ
に挿入し、半田等で固定し、前記容量素子３の周
囲にこのコイル４を同軸的に配置する。その状態
で接続金具２の下側径小部２ｃをアンテナエレメ
ント１のパイプに挿通し、両側からカシメ等の手
段で嵌合する。その後、摘みに当る樹脂キヤツプ
５の螺旋溝５ａをコイル４にネジ込んでゆく。所
定位置までネジ込んだら、樹脂キヤツプ５下端内
面と接続金具２の外周面とを接着その他の固定手
段で結合する。 Next, coil 4 which has been space-wound in advance
Connect the tightly wound part at the lower end of the upper small diameter part 2b of the fitting 2.
The coil 4 is inserted coaxially around the capacitive element 3 and fixed with solder or the like. In this state, the lower diameter small portion 2c of the connecting fitting 2 is inserted into the pipe of the antenna element 1, and fitted by means such as caulking from both sides. Thereafter, the spiral groove 5a of the resin cap 5, which corresponds to the knob, is screwed into the coil 4. Once screwed in to a predetermined position, the inner surface of the lower end of the resin cap 5 and the outer circumferential surface of the connecting fitting 2 are joined by adhesive or other fixing means.
そして、キヤツプ５の内面に所定のピツチ及び
深さで形成されている螺旋溝５ａに、あらかじめ
巻かれているとはいえそのピツチは部分的に不均
一であり、かつ左右にたわんでいるコイル４が螺
合することにより正確なピツチ、直進度が矯正さ
れてネジ込まれ所定位置に配置されると同時に、
この挿入時に容量素子部材３も素子側の弾性がキ
ヤツプ５の螺旋溝５ａの山部に支持され、直進度
が保障され正確なピツチ及び直進度の保持によ
り、所定の周波数マツチングが得られ、かつ外部
影響も引出したりする摘みによつて保護され、使
用時にコイルピツチの変化が生じることなく、イ
ンダクタンスのバラツキがない。また容量素子部
材３も前記理由によりコイル４との間隙が一定で
かつ安定するので浮遊容量のバラツキがなく、性
能の安定が図られる。しかも、下方は従来のロツ
ドアンテナと同様のアンテナエレメントであつ
て、いわばロツドアンテナの先端部に通常施され
ている飾り玉としての摘みキヤツプ５内に前記容
量素子とコイルとを装填したので、従来公知のロ
ツドアンテナの感覚で２つの周波数の送受信を行
なうことができる。 Although the coil 4 is pre-wound in a spiral groove 5a formed at a predetermined pitch and depth on the inner surface of the cap 5, the pitch is partially uneven and the coil 4 is bent from side to side. By screwing together, the accurate pitch and straightness are corrected, and at the same time, it is screwed into place and placed in the specified position.
At the time of this insertion, the elasticity of the element side of the capacitive element member 3 is supported by the ridges of the spiral groove 5a of the cap 5, and the straightness is guaranteed, and by maintaining accurate pitch and straightness, a predetermined frequency matching is obtained. It is protected by a knob that extracts external influences, so the coil pitch does not change during use and there is no variation in inductance. Further, the gap between the capacitive element member 3 and the coil 4 is constant and stable for the above-mentioned reason, so there is no variation in stray capacitance, and performance is stabilized. Moreover, the lower part is an antenna element similar to a conventional rod antenna, and the capacitive element and coil are loaded in the knob cap 5, which is a decorative bead that is normally provided at the tip of a rod antenna. It can transmit and receive two frequencies just like a rod antenna.
以上の如く本考案によれば、使用時におけるコ
イル自立性及び容量素子部材とコイル間の安定化
が図れ、特に近接した２つの周波数で送受信を行
なう場合に安定した性能が得られる。
As described above, according to the present invention, coil independence during use and stability between the capacitive element member and the coil can be achieved, and stable performance can be obtained especially when transmitting and receiving at two nearby frequencies.
また、外観上は従来のホイツプアンテナと変ら
ないため、ホイツプアンテナのスリムな感覚及び
使用感が得られる。 In addition, since the external appearance is the same as that of a conventional whip antenna, the slim feel and usability of the whip antenna can be obtained.
第１図は本考案に係るマルチバンドホイツプア
ンテナの構成を示す断面図、第２図は第１図にお
ける等価回路を示す図、第３図は従来のマルチバ
ンドホイツプアンテナを示す図である。
１……アンテナエレメント、２……接続金具、
２ａ……径大部、２ｂ，２ｃ……径小部、２ｄ…
…貫通孔、３……容量素子部材、３ａ……中心導
体、３ｂ……弾性絶縁体、４……コイル、５……
絶縁性キヤツプ、５ａ……螺旋溝、６……トラツ
プ回路。
FIG. 1 is a cross-sectional view showing the configuration of a multi-band whip antenna according to the present invention, FIG. 2 is a diagram showing an equivalent circuit in FIG. 1, and FIG. 3 is a diagram showing a conventional multi-band whip antenna. It is. 1... Antenna element, 2... Connection fittings,
2a...large diameter part, 2b, 2c...small diameter part, 2d...
...Through hole, 3... Capacitive element member, 3a... Center conductor, 3b... Elastic insulator, 4... Coil, 5...
Insulating cap, 5a... spiral groove, 6... trap circuit.
Claims (1)
電性接続金具と、該接続金具に中心導体が電気的
に接続され、該導体の周囲を弾性絶縁体で被覆し
た棒状の容量素子部材と、該容量素子部材の周囲
に同軸的に配設しその下部が前記接続金具と電気
的に接続するコイルと、該コイルを保持する螺旋
溝を内面に形成し基部が前記接続金具と嵌合して
保持される絶縁性キヤツプとを備え、前記容量素
子部材とコイルによるトラツプ回路を絶縁性キヤ
ツプ内に構成したことを特徴とするマルチバンド
ホイツプアンテナ。 a cylindrical conductive connecting fitting that fits into the tip of the antenna element; a rod-shaped capacitive element member having a center conductor electrically connected to the connecting fitting and covering the conductor with an elastic insulator; A coil disposed coaxially around the element member, the lower part of which is electrically connected to the connecting fitting, and a spiral groove for holding the coil formed on the inner surface, the base of which is fitted and held by the connecting fitting. What is claimed is: 1. A multi-band whip antenna, comprising: an insulating cap; wherein a trap circuit including the capacitive element member and the coil is constructed within the insulating cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19789886U JPH042486Y2 (en) | 1986-12-23 | 1986-12-23 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19789886U JPH042486Y2 (en) | 1986-12-23 | 1986-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63102309U JPS63102309U (en) | 1988-07-04 |
| JPH042486Y2 true JPH042486Y2 (en) | 1992-01-28 |
Family
ID=31158088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19789886U Expired JPH042486Y2 (en) | 1986-12-23 | 1986-12-23 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH042486Y2 (en) |
-
1986
- 1986-12-23 JP JP19789886U patent/JPH042486Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63102309U (en) | 1988-07-04 |
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