JPH047843B2 - - Google Patents
Info
- Publication number
- JPH047843B2 JPH047843B2 JP29678487A JP29678487A JPH047843B2 JP H047843 B2 JPH047843 B2 JP H047843B2 JP 29678487 A JP29678487 A JP 29678487A JP 29678487 A JP29678487 A JP 29678487A JP H047843 B2 JPH047843 B2 JP H047843B2
- Authority
- JP
- Japan
- Prior art keywords
- antenna element
- antenna
- short
- section
- present
- 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
- 238000010586 diagram Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000005855 radiation Effects 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 238000007740 vapor deposition Methods 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、アンテナ装置、特に可撓性のシート
状材の上に薄い膜状のアンテナ素子部を形成した
ものにおいて、全体を小形化できるとともに、そ
の特性の良いアンテナ装置に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an antenna device, particularly an antenna device in which a thin film-like antenna element portion is formed on a flexible sheet-like material, which can be miniaturized as a whole. The present invention also relates to an antenna device with good characteristics.
［従来の技術］
従来、室内用または自動車用のアンテナ等とし
て、第９図に示すような短縮形のアンテナ装置が
使用されている。この図示したアンテナ装置１は
たとえばダイポール形アンテナであり、そのアン
テナ素子部２は波形に屈曲され、このアンテナ装
置の全長Ｌを短縮し、全体を小形化するように構
成されている。なお、３は給電部である。しか
し、このようなものはこのアンテナ素子部２を波
形に形成するため、その特性が低下する不具合が
あつた。すなわち、このアンテナ素子部が直線状
の場合には、第１０図のスミス線図にａで示すよ
うな特性になるが、このアンテナ素子部を波形に
形成すると、全体の放射抵抗が小さくなり、第１
０図のｂに示すように周波数軌跡が広がつたイン
ピーダンスとなり、機器との整合がとりにくくな
る不具合を生じる。このような不具合は、この波
形のアンテナ素子部２の高さＨが大きくなる程大
きくなる。[Prior Art] Conventionally, a shortened antenna device as shown in FIG. 9 has been used as an indoor or automobile antenna. The illustrated antenna device 1 is, for example, a dipole antenna, and its antenna element portion 2 is bent in a waveform to shorten the overall length L of the antenna device and make the entire antenna device smaller. Note that 3 is a power feeding section. However, since the antenna element portion 2 of this type is formed into a wave shape, there is a problem that its characteristics deteriorate. That is, if this antenna element part is linear, the characteristics will be as shown by a in the Smith diagram of FIG. 10, but if this antenna element part is formed into a wave shape, the overall radiation resistance will be reduced, 1st
As shown in Figure 0b, the frequency locus becomes an impedance spread out, causing a problem that it becomes difficult to match with the equipment. Such a problem becomes larger as the height H of the waveform antenna element section 2 becomes larger.
［発明が解決しようとする問題点］
本発明は以上の事情に基づいてなされたもの
で、全体を小形に形成でき、しかも特性の良いア
ンテナ装置を提供するものである。[Problems to be Solved by the Invention] The present invention has been made based on the above circumstances, and it is an object of the present invention to provide an antenna device that can be made compact as a whole and has good characteristics.
［問題点を解決するための手段とその作用］
本発明は、アンテナ素子部を波形に屈曲した形
状とし、かつこの波形のアンテナ部の一部を短絡
する短絡部を形成したものである。[Means for Solving the Problems and Their Effects] According to the present invention, the antenna element portion has a wave-shaped bent shape, and a short-circuit portion is formed to short-circuit a part of the wave-shaped antenna portion.
このものは、この短絡された部分が等価的に太
いアンテナ素子部を形成するため、放射抵抗があ
まり小さくならず、よつて周波数軌跡が広がら
ず、機器との整合のとりやすい特性が得られる。 In this case, the short-circuited part forms an equivalently thick antenna element, so the radiation resistance does not become too small, the frequency locus does not spread, and characteristics that are easy to match with equipment can be obtained.
［実施例］
以下、第１図ないし第８図を参照して本発明の
実施例を説明する。第１図および第２図には本発
明の第１の実施例を示す。このものは、フイルム
状のダイポール形アンテナ装置である。図中の１
１は可撓性を有する電気絶縁性のフイルムであつ
て、たとえば合成樹脂のフイルム、布、紙等から
構成されている。そして、このフイルム１１の表
面には、同様に可撓性を有する薄い導電性材料か
らなるアンテナ１２が形成されている。このアン
テナ１２は、アルミニウム、銅等の金属箔を上記
のフイルム１１上に接着した後、余分の部分をエ
ツチング等で除去するか、または銀等の金属ペー
ストをこのフイルム１１に印刷するか、あるいは
金等の酸化被膜をこのフイルム１１上に蒸着して
形成する。そして、このアンテナ１２のアンテナ
素子部１３は、波形に形成され、その全長を短縮
するように構成されている。なお、このアンテナ
素子部１３には、先端ローテイング部１４、給電
線部１５、給電端子部１６がそれぞれ一体に形成
されている。[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 8. 1 and 2 show a first embodiment of the present invention. This is a film-like dipole antenna device. 1 in the diagram
Reference numeral 1 denotes a flexible electrically insulating film, which is made of, for example, a synthetic resin film, cloth, paper, or the like. Further, on the surface of this film 11, an antenna 12 made of a thin conductive material having flexibility is formed. This antenna 12 can be made by bonding a metal foil such as aluminum or copper onto the film 11 and then removing the excess portion by etching or by printing a metal paste such as silver on the film 11. An oxide film of gold or the like is formed on this film 11 by vapor deposition. The antenna element section 13 of this antenna 12 is formed into a wave shape, and is configured to shorten its overall length. Note that the antenna element section 13 is integrally formed with a tip rotating section 14, a feed line section 15, and a feed terminal section 16, respectively.
そして、この波形のアンテナ素子部１３の根元
部すなわち給電側の端部には、このアンテナ素子
部１３の軸方向に沿つた短絡部１７が一体に形成
され、この波形の部分を短絡している。 A shorting part 17 along the axial direction of this antenna element part 13 is integrally formed at the root part of this waveform antenna element part 13, that is, the end part on the power feeding side, and short-circuiting this waveform part. .
以上の如く構成された本発明の第１の実施例
は、このアンテナ素子部１３の一部が短絡部１７
によつて短絡されているので、この部分が等価的
に太いダイポールアンテナを形成し、その放射抵
抗があまり小さくならないので周波数軌跡のあま
り広がらないインピーダンスとなり、機器との整
合がとりやすくなる。なお、この短絡部はこのア
ンテナ素子部１３の根元部すなわち給電部側の端
部以外の部分に形成してもよいが、アンテナ素子
部１３の電流分布の大きい根元部に形成したほう
が効果が大きい。この効果を第３図ないし第６図
に示す。すなわち、第３図に示すようにこの短絡
部１７をアンテナ素子部１３の根元部に形成した
場合の特性を第６図のスミス線図にｃで示し、ま
た第４図に示すようにこの短絡部１７をアンテナ
素子部１３の中間部に形成した場合の特性をｄ、
第５図に示すように短絡部１７をアンテナ素子部
１３の先端部に形成した場合の特性をｅで示す。
これらの図から明らかなように、同じ長さの短絡
部であつてもアンテナ素子部１３の根元部に近い
程周波数軌跡の狭い特性が得られる。なお、これ
らアンテナ素子部１３やその短絡部１７の形状や
寸法等は、受信すべき周波数帯域に対応して適宜
設定するものである。 In the first embodiment of the present invention configured as described above, a part of the antenna element section 13 is connected to the short-circuit section 17.
Since it is short-circuited by the antenna, this part effectively forms a thick dipole antenna, and its radiation resistance does not become very small, resulting in an impedance that does not spread the frequency locus very much, making it easier to match with equipment. Note that this short-circuit portion may be formed at a portion other than the root portion of the antenna element portion 13, that is, the end portion on the feeding portion side, but it is more effective if it is formed at the root portion of the antenna element portion 13 where the current distribution is large. . This effect is shown in FIGS. 3 to 6. That is, as shown in FIG. 3, the characteristics when this short-circuit portion 17 is formed at the base of the antenna element portion 13 are shown by c in the Smith diagram of FIG. 6, and as shown in FIG. The characteristics when the part 17 is formed in the middle part of the antenna element part 13 are d,
Characteristics when the short circuit portion 17 is formed at the tip of the antenna element portion 13 as shown in FIG. 5 are indicated by e.
As is clear from these figures, even if the length of the short circuit is the same, the closer to the root of the antenna element section 13 the narrower the frequency locus can be obtained. Note that the shape, dimensions, etc. of the antenna element section 13 and its short-circuit section 17 are appropriately set in accordance with the frequency band to be received.
また、第７図には、本発明の第２の実施例を示
す、このものは、アンテナ素子部１３ａを矩形の
波形に形成したものである。この実施例は上記の
点以外は前記した第１の実施例と同様の構成であ
り、第７図中第１の実施例と対応する部分は同じ
符号を付してその説明を省略する。 Further, FIG. 7 shows a second embodiment of the present invention, in which the antenna element portion 13a is formed into a rectangular waveform. This embodiment has the same structure as the first embodiment described above except for the above points, and the parts in FIG. 7 that correspond to those of the first embodiment are designated by the same reference numerals and their explanation will be omitted.
また、第８図には本発明の第３の実施例を示
す。このものは、アンテナ素子部の根元側端部に
幅の広い帯状の短絡部１７ｂを形成したものであ
る。このものも上記の第１および第２の実施例と
同様の効果を有する。なお、この実施例は上記の
点以外は上記の第２の実施例と同様の構成であ
り、第８図中第２の実施例に対応する部分には同
じ符号を付してその説明を省略する。 Further, FIG. 8 shows a third embodiment of the present invention. This device has a wide band-shaped short-circuit portion 17b formed at the root end of the antenna element portion. This also has the same effects as the first and second embodiments described above. This embodiment has the same configuration as the second embodiment described above except for the above points, and the same reference numerals are given to the parts corresponding to the second embodiment in FIG. do.
さらに、本発明は上記の実施例にも限定されな
い。たとえば、アンテナ素子部は必ずしも前述の
如くＵ字状または矩形の波形に形成しなくてもよ
く、その他三角形、台形の波形等、このアンテナ
素子部の長さを短縮することができるような各種
の形状の波形に形成してもよい。また、本発明は
上記の如きダイポール形のアンテナに限らず、そ
の他の形式のアンテナにも適用できるものであ
る。 Furthermore, the invention is not limited to the above embodiments either. For example, the antenna element part does not necessarily have to be formed into a U-shape or rectangular waveform as described above, but may be formed into a triangular or trapezoidal waveform, etc., which can shorten the length of the antenna element part. It may be formed into a wavy shape. Further, the present invention is not limited to the dipole antenna as described above, but can also be applied to other types of antennas.
［発明の効果］
上述の如く本発明は、アンテナ素子部を波形に
屈曲した形状とし、かつこの波形のアンテナ部の
一部を短絡する短絡部を形成したものである。[Effects of the Invention] As described above, in the present invention, the antenna element portion is bent into a wave shape, and a short-circuit portion is formed to short-circuit a part of the wave-shaped antenna portion.
したがつて、この短絡された部分が等価的に太
いアンテナ素子部を形成するため、放射抵抗があ
まり小さくならず、よつて周波数軌跡が広がら
ず、機器との整合がとりやすくなる等、その効果
は大である。 Therefore, this short-circuited part forms an equivalently thick antenna element, so the radiation resistance does not become too small, the frequency locus does not spread, and it becomes easier to match with equipment, etc. is large.
第１図ないし第２図は本発明の第１の実施例を
示し、第１図は平面図、第２図は第１図の−
線に沿う断面図である。また、第３図ないし第５
図は短絡部の位置をそれぞれ変えた場合の概略的
な平面図、第６図はこれら第３図ないし第５図に
示すアンテナの特性をそれぞれ示すスミス線図で
ある。また、第７図は本発明の第２の実施例の平
面図、第８図は第３の実施例の平面図である。ま
た、第９図は従来例のアンテナの概略的な平面
図、第１０図はその特性を示すスミス線図であ
る。
１１…フイルム、１２…アンテナ、１３…アン
テナ素子部、１４…先端ローデイング部、１６…
給電端子部、１７…短絡部。
1 and 2 show a first embodiment of the present invention, FIG. 1 is a plan view, and FIG. 2 is a -
It is a sectional view along a line. Also, Figures 3 to 5
The figure is a schematic plan view when the position of the short-circuit portion is changed, and FIG. 6 is a Smith diagram showing the characteristics of the antenna shown in FIGS. 3 to 5. Further, FIG. 7 is a plan view of a second embodiment of the present invention, and FIG. 8 is a plan view of a third embodiment. Further, FIG. 9 is a schematic plan view of a conventional antenna, and FIG. 10 is a Smith diagram showing its characteristics. DESCRIPTION OF SYMBOLS 11...Film, 12...Antenna, 13...Antenna element part, 14...Tip loading part, 16...
Power supply terminal section, 17... short circuit section.
Claims (1)
の波形のアンテナ素子部の一部を短絡する短絡部
とを具備したことを特徴とするアンテナ装置。1. An antenna device comprising a wave-shaped antenna element section and a short-circuit section that short-circuits a part of the wave-shaped antenna element section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29678487A JPH01137802A (en) | 1987-11-25 | 1987-11-25 | Antenna system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29678487A JPH01137802A (en) | 1987-11-25 | 1987-11-25 | Antenna system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01137802A JPH01137802A (en) | 1989-05-30 |
| JPH047843B2 true JPH047843B2 (en) | 1992-02-13 |
Family
ID=17838090
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29678487A Granted JPH01137802A (en) | 1987-11-25 | 1987-11-25 | Antenna system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01137802A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9300032B2 (en) * | 2007-10-31 | 2016-03-29 | Tyco Fire & Security Gmbh | RFID antenna system and method |
| CN118662745B (en) * | 2024-07-24 | 2025-02-18 | 上海应手医疗器械有限公司 | Intraoperative monitoring tracheal cannula |
-
1987
- 1987-11-25 JP JP29678487A patent/JPH01137802A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01137802A (en) | 1989-05-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4706060A (en) | Surface mount varistor | |
| JPH0620802A (en) | Bulk metal chip resistor | |
| US20190237246A1 (en) | Coil component and electronic device | |
| JPH0878945A (en) | Helical antenna | |
| JPH047843B2 (en) | ||
| US3997821A (en) | Solid electrolytic capacitor with planar cathode lead | |
| US4231041A (en) | Electrically conducting lead termination apparatus for a thin film antenna | |
| JP2004015500A (en) | Antenna element and antenna device | |
| CN100470926C (en) | Methods of Improving the Performance of Antenna Grounding Part | |
| JPH03280408A (en) | Planar inductance element | |
| JP2730717B2 (en) | Bias circuit for high frequency transmission line | |
| JPH055686Y2 (en) | ||
| US1470337A (en) | Terminal connecter for electrical windings | |
| US3769614A (en) | Ground plane pattern for delay lines and method of assembly | |
| JPH04129302A (en) | Antenna for radio equipment | |
| JPS60802B2 (en) | slot antenna | |
| US11562837B2 (en) | Circuit substrate | |
| JP3008520U (en) | Antenna unit | |
| JPH0117846Y2 (en) | ||
| JPS6240438Y2 (en) | ||
| US4824397A (en) | Electrical connecting device | |
| JP2708770B2 (en) | Circuit integrated antenna | |
| JP2764973B2 (en) | Solid electrolytic capacitor with fuse | |
| JPH01316005A (en) | Flat plate antenna | |
| JPS58147783A (en) | Liquid crystal display |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |