JPH0734523B2 - Rain gutter antenna - Google Patents
Rain gutter antennaInfo
- Publication number
- JPH0734523B2 JPH0734523B2 JP62288005A JP28800587A JPH0734523B2 JP H0734523 B2 JPH0734523 B2 JP H0734523B2 JP 62288005 A JP62288005 A JP 62288005A JP 28800587 A JP28800587 A JP 28800587A JP H0734523 B2 JPH0734523 B2 JP H0734523B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- rain gutter
- conductor
- transmission line
- metal core
- 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
- 239000004020 conductor Substances 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 10
- 239000002184 metal Substances 0.000 claims description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 5
- 238000010276 construction Methods 0.000 description 7
- 238000009434 installation Methods 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 125000006850 spacer group Chemical group 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 235000007516 Chrysanthemum Nutrition 0.000 description 1
- 244000189548 Chrysanthemum x morifolium Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 210000005069 ears Anatomy 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C5/00—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms
- C07C5/02—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation
- C07C5/10—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by hydrogenation of aromatic six-membered rings
- C07C5/11—Partial hydrogenation
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2523/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00
- C07C2523/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals
- C07C2523/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group C07C2521/00 of noble metals combined with metals, oxides or hydroxides provided for in groups C07C2523/02 - C07C2523/36
- C07C2523/56—Platinum group metals
- C07C2523/60—Platinum group metals with zinc, cadmium or mercury
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C2601/00—Systems containing only non-condensed rings
- C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
- C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Details Of Aerials (AREA)
Description
【発明の詳細な説明】 ［技術分野］ 本発明は、雨樋の導電部材をアンテナ部材として利用す
る雨樋アンテナに関するものである。Description: TECHNICAL FIELD The present invention relates to a rain gutter antenna that uses a conductive member of a rain gutter as an antenna member.
［背景技術］ 一般に、雨樋は家屋の最外周部に位置しているため、雨
樋を導電部材を用いて形成している場合には、放送受信
用のアンテナとしても利用できる。[Background Art] Generally, since the rain gutter is located at the outermost periphery of the house, when the rain gutter is formed by using a conductive member, it can be used as an antenna for receiving broadcasts.
このような雨樋アンテナは、従来、中波放送受信用のア
ンテナとして用いられており、電燈線アンテナ、バーア
ンテナなどの他のアンテナよりも高性能を発揮すること
が知られている。ところが、波長が長い中波放送（〜数
百ｍ）を受信する場合は、従来の小型アンテナに比べて
アンテナが効率が良いものの、比較的波長の短いVHF
帯、UHF帯の放送を受信するアンテナとして利用しよう
とした場合には、所要の電気長よりも長いアンテナとし
て動作するので、短縮コンデンサのような整合回路を付
加する必要がある。Such a rain gutter antenna has been conventionally used as an antenna for receiving medium-wave broadcasting, and is known to exhibit higher performance than other antennas such as a power line antenna and a bar antenna. However, when receiving medium-wave broadcasting with a long wavelength (up to several hundreds of meters), VHF with a relatively short wavelength is used, though the antenna is more efficient than conventional small antennas.
When it is intended to be used as an antenna for receiving band and UHF band broadcasts, it operates as an antenna longer than the required electrical length, so it is necessary to add a matching circuit such as a shortening capacitor.
しかも施工状況によって電気長が異なるので、設置後個
別に調整する必要があり、施工が面倒であるという問題
があった。また、アンテナ構造によっては、雨樋が雨水
で満水になると、アンテナ利得が低下してしまうという
問題があった。Moreover, since the electric length varies depending on the construction situation, there is a problem that the construction is troublesome because it needs to be adjusted individually after installation. Further, depending on the antenna structure, when the rain gutter is filled with rainwater, there is a problem that the antenna gain is reduced.
さらに、導電性部材で構成された雨樋（例えば、金属芯
入り雨樋）では、アンテナとして動作する部分を切り離
して絶縁部材を介在させると、機械的強度が低下すると
いう問題があり、仮に分離が可能であっても、切り離さ
れた導電部材とアンテナとして作動する部分との間の相
互インピーダンスによってアンテナの指向性、インピー
ダンス特性が乱れるという問題があった。In addition, in a rain gutter made of a conductive material (for example, a rain gutter with a metal core), if the part that operates as an antenna is separated and an insulating member is interposed, the mechanical strength will decrease, and it will be temporarily separated. However, there is a problem in that the directivity and impedance characteristics of the antenna are disturbed by the mutual impedance between the separated conductive member and the portion that operates as the antenna.
［発明の目的］ 本発明は上記の点に鑑みて為されたものであり、構造が
比較的簡単で、アンテナ特性が施工状態に影響されず、
しかも、設置時の調整が不要な雨樋アンテナを提供する
ことを目的とするものである。[Object of the Invention] The present invention has been made in view of the above points, has a relatively simple structure, antenna characteristics are not affected by the construction state,
Moreover, it is an object of the present invention to provide a rain gutter antenna that does not require adjustment during installation.
［発明の開示］ （構成） 本発明は、導電性部材を用いて構成された雨樋の一部
を、ダイポール型アンテナとして使用するとともに、目
的とする受信周波数に適合した長手方向の長さ部分の両
側に、先端短絡型の４分の１波長チョーク手段を配置す
ることにより、構造が比較的簡単で、アンテナ特性が施
工状態に影響されず、しかも、設置時の調整が不要な雨
樋アンテナを提供するものである。DISCLOSURE OF THE INVENTION (Structure) In the present invention, a part of a rain gutter configured by using a conductive member is used as a dipole antenna, and a longitudinal length portion adapted to a target reception frequency is used. By arranging the short-circuited quarter-wave choke means on both sides of the antenna, the structure is relatively simple, the antenna characteristics are not affected by the construction conditions, and the rain gutter antenna does not require adjustment during installation. Is provided.
（実施例１） 第１図乃至第４図は本発明の一実施例を示すもので、導
電部材（実施例では、鉄、銅、アルミ板のような金属
芯）１を用いて構成された雨樋２の要部（長さがλ/2）
をアンテナ部３とし、アンテナ部３の長手方向の両端に
受信波長λに対応した伝送線路型チョーク４を設けたも
のであり、実施例にあっては、伝送線路型チョーク４と
して先端短絡型４分の１波長伝送線路（λ/4）を用いて
いる。(Embodiment 1) FIGS. 1 to 4 show an embodiment of the present invention, which is constituted by using a conductive member (in the embodiment, a metal core such as iron, copper or aluminum plate) 1. Main part of rain gutter 2 (length is λ / 2)
Is used as the antenna part 3, and transmission line type chokes 4 corresponding to the reception wavelength λ are provided at both ends of the antenna part 3 in the longitudinal direction. A one-wavelength transmission line (λ / 4) is used.
また、実施例では、金属芯１入り雨樋２の下部に長手方
向に沿って受信波長λの４分の１の長さの導電体５を金
属芯１と導電体５との間隔をスペーサ手段６によって一
定に保持して配設し、導電体５の一端を金属芯１に電気
的に接続することにより伝送線路型チョーク４を形成し
ている。Further, in the embodiment, the conductor 5 having a length of ¼ of the reception wavelength λ is provided along the longitudinal direction at the bottom of the rain gutter 2 containing the metal core 1, and the space between the metal core 1 and the conductor 5 is provided as spacer means. The transmission line type choke 4 is formed by arranging the conductor 6 so as to be held constant and electrically connecting one end of the conductor 5 to the metal core 1.
さらに、実施例では、導電部材1a〜1dを付加することに
より、折り返し型ダイポールアンテナ（フォールデッド
ダイポールアンテナ）を構成しており、給電部７に給電
ケーブル（図示せず）が接続される。Further, in the embodiment, a folded dipole antenna (folded dipole antenna) is configured by adding the conductive members 1a to 1d, and a power feeding cable (not shown) is connected to the power feeding unit 7.
なお、雨樋２は、鉄板を半円状に曲成し両端縁に耳部を
形成した金属芯１の周囲を合成樹脂９（例えば、硬質塩
化ビニル）で被覆した構造を有しており、伸縮、変形、
割れなどがなく、錆や腐食も発生しないようになってい
る。また、伝送線路型チョーク４を形成する導電体５
は、雨樋２と同様に合成樹脂９にて被覆されており、特
性インピーダンスを一定に保つために導電体５の両側縁
を保持するスペーサ手段６は合成樹脂製の保持片（実施
例では、雨樋２に接着されている）にて形成されてい
る。The rain gutter 2 has a structure in which an iron plate is bent in a semicircular shape and a metal core 1 having ears formed at both end edges is covered with a synthetic resin 9 (for example, hard vinyl chloride). Expansion, deformation,
There are no cracks, and no rust or corrosion occurs. In addition, the conductor 5 forming the transmission line type choke 4
Is covered with a synthetic resin 9 similarly to the rain gutter 2, and the spacer means 6 for holding both side edges of the conductor 5 in order to keep the characteristic impedance constant is a holding piece made of synthetic resin (in the embodiment, It is bonded to the rain gutter 2).
第４図は電気的接続部分を示すもので、雨樋２の導電部
材である金属芯１と導電体５とが接続導体5aを介してア
ルミニウム製のリベット８により安定し状態に接続され
ている。なお、リベット８に代えてセルフタッピングビ
スを用いたり、スポット溶接によって電気接続を行って
も良いことは言うまでもない。FIG. 4 shows an electrical connection part, in which the metal core 1 which is the conductive member of the gutter 2 and the conductor 5 are stably connected by the aluminum rivet 8 via the connection conductor 5a. . Needless to say, a self-tapping screw may be used instead of the rivet 8 or electric connection may be made by spot welding.
以下、実施例の動作について説明する。いま、実施例に
あっては、アンテナ部３の長手方向の両端に伝送線路型
チョーク４を設けることにより、アンテナ部３と導電部
材である金属芯１の他の部分とを高周波的に絶縁するよ
うになっているので、特別な絶縁部材を介在させる必要
がないうえ、電気長を調整する短縮コンデンサ、整合回
路などを必要とせず、構造が比較的簡単になるととも
に、整合回路の調整が不要になって施工を容易に行なう
ことができる。The operation of the embodiment will be described below. In the present embodiment, the transmission line type chokes 4 are provided at both ends in the longitudinal direction of the antenna section 3 to insulate the antenna section 3 from other portions of the metal core 1 which is a conductive member in terms of high frequency. Since there is no need to interpose a special insulating member, there is no need for a shortening capacitor for adjusting the electrical length, a matching circuit, etc., and the structure is relatively simple, and no adjustment of the matching circuit is required. Therefore, the construction can be easily performed.
また、アンテナ部３以外の導電部材１との間の相互イン
ピーダンスを考慮する必要がないので、アンテナ特性が
施工状態に影響されず、しかも、設置時の調整が不要な
雨樋アンテナを実現できる。なお、雨樋２に雨水が溜ま
ってもアンテナ特性に影響することがなく、安定した受
信特性が得られる。Further, since it is not necessary to consider the mutual impedance between the conductive member 1 other than the antenna part 3, the antenna characteristics are not affected by the construction state, and a rain gutter antenna which does not require adjustment at the time of installation can be realized. Even if rainwater collects in the rain gutter 2, the antenna characteristics are not affected, and stable reception characteristics can be obtained.
（実施例２） 第５図および第６図は本発明の他の実施例を示すもの
で、前記実施例の折り返し型ダイポールアンテナ部分の
左右半体が、両端に設けられている先端短絡型４分の１
波長伝送線路よりなる伝送線路型チョーク４と略同一構
成であり、一対の伝送線路型チョーク４の開放端を接続
した構成となっている点に着目し、４個の伝送線路ユニ
ット4a,4a,4a,4aを用いて雨樋アンテナを形成したもの
である。(Embodiment 2) FIG. 5 and FIG. 6 show another embodiment of the present invention, in which the left and right halves of the folded dipole antenna portion of the above embodiment are provided at both ends with a short-circuited tip 4. One-third
The four transmission line units 4a, 4a, 4a, 4a, 4a, 4a, 4a, 4a, 4a, 4a, 4a, 4a A rain gutter antenna is formed using 4a and 4a.
ここに、４個の伝送線路ユニット4a,4a,4a,4aは、それ
ぞれ絶縁体よりなる継手10によって接続され、中央の２
個の伝送線路ユニット4aの開放端を接続導体11にて接続
することにより折り返し型ダイポールアンテナを形成し
ている。Here, the four transmission line units 4a, 4a, 4a, 4a are connected by a joint 10 made of an insulator, respectively, and are connected to each other at the center 2
A folded dipole antenna is formed by connecting the open ends of the individual transmission line units 4a with the connection conductor 11.
なお、継手10を導電体にて形成した場合には、接続導体
11は不要である。また、折り返し型ダイポールアンテナ
部分を構成する伝送線路ユニット4aの開放端には引き出
し導体12が設けられている。If the joint 10 is made of a conductor,
11 is unnecessary. A lead conductor 12 is provided at the open end of the transmission line unit 4a that constitutes the folded dipole antenna portion.
いま、本実施例にあっては、伝送線路型チョーク４と折
り返し型ダイポールアンテナ部分とを、同一の伝送線路
ユニット4aを用いて形成できるので、製造が容易になっ
てコストを安くすることができる。しかも、保守も容易
になる。Now, in the present embodiment, the transmission line type choke 4 and the folded dipole antenna portion can be formed by using the same transmission line unit 4a, so that the manufacturing can be facilitated and the cost can be reduced. . Moreover, maintenance becomes easy.
（実施例３） 第７図および第８図は本発明のさらに他の実施例を示す
もので、前記実施例の折り返し型ダイポールアンテナに
代えてダイポールアンテナを形成したものであり、他の
構成および動作は前述の実施例と同一である。(Embodiment 3) FIGS. 7 and 8 show still another embodiment of the present invention in which a dipole antenna is formed in place of the folded dipole antenna of the above embodiment. The operation is the same as the above-mentioned embodiment.
いま、本実施例にあっては、折り返し型ダイポールアン
テナを形成した場合に比べて受信周波数帯域幅が狭くな
るものの、折り返し部分が不要になって構成が簡単にな
るので、コストを安くできることになる。Now, in the present embodiment, although the reception frequency bandwidth is narrower than in the case of forming the folded dipole antenna, the folded portion is not necessary and the configuration is simple, so that the cost can be reduced. .
第９図は、継手10の具体構成例を示すものであり、継手
10は絶縁性の合成樹脂にて形成されており、中央ストッ
パ部10aが突設され、このストッパ10aの両側に形成され
た差し込み部10b内面に接着剤を塗布して雨樋２を差し
込むことにより、両雨樋２が継手10を介して機械的に接
続固定されるようになっている。また、第10図は給電部
７の具体構成を示すもので、雨樋２の導電部材１と引き
出し導体12はタッピングネジ15にて電気的、機械的に接
続され、合成樹脂製のケース16内には平衡、不平衡変換
トランス（折り返し型ダイポールアンテナの場合は変成
比が4:1、ダイポールアンテナの場合は変成比が1:1）が
収納されており、給電ケーブル17として75Ωの同軸ケー
ブルが用いられている。また、電気的接続を確実にする
場合には、必要に応じて菊型座金が使用される。FIG. 9 shows a concrete configuration example of the joint 10.
10 is made of an insulating synthetic resin, and a central stopper portion 10a is provided in a protruding manner. By applying an adhesive to the inner surfaces of the insertion portions 10b formed on both sides of the stopper 10a and inserting the rain gutter 2, Both rain gutters 2 are mechanically connected and fixed via a joint 10. Further, FIG. 10 shows a specific structure of the power feeding part 7, in which the conductive member 1 of the rain gutter 2 and the lead conductor 12 are electrically and mechanically connected by a tapping screw 15, and a case 16 made of synthetic resin is provided. A balanced and unbalanced conversion transformer (in the case of a folded dipole antenna, the transformation ratio is 4: 1 and in the case of a dipole antenna, the transformation ratio is 1: 1) is stored, and a 75Ω coaxial cable is used as the feeding cable 17. It is used. A chrysanthemum washer is used as needed to ensure electrical connection.
なお、折り返し型ダイポールアンテナの場合、給電ケー
ブル17を300Ωの平衡型フィーダとすれば、平衡、不平
衡変換トランスは不要となる。In the case of the folded dipole antenna, if the feeding cable 17 is a 300Ω balanced feeder, the balanced / unbalanced conversion transformer is not necessary.
［発明の効果］ 本発明は上述のように、導電性部材を用いて構成された
雨樋の一部を、ダイポール型アンテナとして使用すると
ともに、目的とする受信周波数に適合した長手方向の長
さ部分の両側に、先端短絡型の４分の１波長チョーク手
段を配置したから、構造が比較的簡単で、アンテナ特性
が施工状態に影響されず、しかも、設置時の調整が不要
な雨樋アンテナを提供することができるという効果があ
る。[Advantages of the Invention] As described above, the present invention uses a part of a rain gutter configured by using a conductive member as a dipole antenna and has a length in a longitudinal direction adapted to a target reception frequency. Since the short-circuited quarter-wave choke means are arranged on both sides of the part, the structure is relatively simple, the antenna characteristics are not affected by the construction condition, and no adjustment is required during installation. Can be provided.
第１図は本発明一実施例の原理説明図、第２図は同上の
要部斜視図、第３図（ａ）（ｂ）は同上の要部断面図、
第４図は同上の要部断面図、第５図は本発明の他の実施
例の原理説明図、第６図は同上の概略構成図、第７図は
さらに他の実施例の原理説明図、第８図は同上の概略構
成図、第９図および第10図は同上の要部分解斜視図であ
る。 １は導電部材、２は雨樋、３はアンテナ部、４は伝送線
路型チョーク、５は導電体、６はスペーサである。FIG. 1 is an explanatory view of the principle of one embodiment of the present invention, FIG. 2 is a perspective view of an essential part of the same, and FIGS. 3 (a) and 3 (b) are sectional views of the essential part of the same.
FIG. 4 is a sectional view of the main part of the same as above, FIG. 5 is an explanatory view of the principle of another embodiment of the present invention, FIG. 6 is a schematic configuration diagram of the same as above, and FIG. 7 is an explanatory view of the principle of yet another embodiment. FIG. 8 is a schematic configuration diagram of the same as above, and FIGS. 9 and 10 are exploded perspective views of main parts of the same. 1 is a conductive member, 2 is a rain gutter, 3 is an antenna part, 4 is a transmission line type choke, 5 is a conductor, and 6 is a spacer.
Claims (2)
を、ダイポール型アンテナとして使用するとともに、目
的とする受信周波数に適合した長手方向の長さ部分の両
側に、先端短絡型の４分の１波長チョーク手段を配置し
たことを特徴とする雨樋アンテナ。1. A part of a rain gutter constructed by using a conductive member is used as a dipole type antenna, and a tip short-circuit type is provided on both sides of a lengthwise portion adapted to a target reception frequency. A rain gutter antenna characterized by arranging a quarter wavelength choke means of the above.
受信波長の４分の１の長さの導電体を鉄芯と導電体との
間隔を一定に保持して配設し、導電体の一端を金属芯に
電気的に接続することにより伝送線路型チョークを形成
したことを特徴とする特許請求の範囲第１項記載の雨樋
アンテナ。2. A conductor having a length of ¼ of the reception wavelength is arranged along the longitudinal direction in the lower part of the rain gutter containing a metal core, while keeping the interval between the iron core and the conductor constant. The rain gutter antenna according to claim 1, wherein a transmission line type choke is formed by electrically connecting one end of the conductor to a metal core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62288005A JPH0734523B2 (en) | 1987-11-14 | 1987-11-14 | Rain gutter antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62288005A JPH0734523B2 (en) | 1987-11-14 | 1987-11-14 | Rain gutter antenna |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01129505A JPH01129505A (en) | 1989-05-22 |
| JPH0734523B2 true JPH0734523B2 (en) | 1995-04-12 |
Family
ID=17724575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62288005A Expired - Lifetime JPH0734523B2 (en) | 1987-11-14 | 1987-11-14 | Rain gutter antenna |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0734523B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4242845B2 (en) * | 2005-01-31 | 2009-03-25 | 東芝テクノネットワーク株式会社 | Planar antenna |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5629510U (en) * | 1979-08-11 | 1981-03-20 | ||
| JPS59193605A (en) * | 1983-04-18 | 1984-11-02 | Denki Kogyo Kk | Dipole antenna |
-
1987
- 1987-11-14 JP JP62288005A patent/JPH0734523B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01129505A (en) | 1989-05-22 |
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