JP2006005860A - 小型アンテナ - Google Patents
小型アンテナ Download PDFInfo
- Publication number
- JP2006005860A JP2006005860A JP2004182640A JP2004182640A JP2006005860A JP 2006005860 A JP2006005860 A JP 2006005860A JP 2004182640 A JP2004182640 A JP 2004182640A JP 2004182640 A JP2004182640 A JP 2004182640A JP 2006005860 A JP2006005860 A JP 2006005860A
- Authority
- JP
- Japan
- Prior art keywords
- reflector
- antenna
- radiator
- wavelength
- small
- 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
Images
Landscapes
- Aerials With Secondary Devices (AREA)
Abstract
【解決手段】同軸給電部122を持つ放射器124と、反射器123と、前記放射器124と前記反射器123とを一定の距離を保つ保持筐体125とを備え、反射器123の電界方向の寸法を下限動作周波数の1/2波長より短くかつ両端が中央部より幅が大きい導体板とすることにより、反射器123を放射器124に比べ寸法が短く実現でき、アンテナが小型になる。
【選択図】図1
Description
電子通信学会編、「アンテナ工学ハンドブック」、オーム社、1980年10月30日、p.116−119
図1は、本発明の実施の形態1における小型アンテナの構成図である。図1において、従来例の図6と同じ構成要素については、同じ符号を用い説明を省略する。
図5は、本発明の実施の形態2における小型アンテナの構成図である。
116 コイル
120 放射素子
121 放射素子
122 給電部
123 反射器
124 放射器
125 保持筐体
126 同軸線
127 出力コネクタ
128 中央部
130 放射器
131 平衡不平衡変換器
132 同軸出力端子
133 反射器
134 凹み形状
Claims (2)
- 同軸給電部を持つ放射器と、電界方向の寸法が使用する波長の1/2波長より短くかつ両端の幅が中央部幅より大きい板状の導体よりなる反射器と、前記放射器と前記反射器を一定の距離を保つ手段とを備えた小型アンテナ。
- 前記反射器を、ループ形状の一部が前記ループ中央部へ折れ曲げて凹み形状を持つ導体より形成した、請求項1に記載の小型アンテナ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004182640A JP4274056B2 (ja) | 2004-06-21 | 2004-06-21 | 小型アンテナ |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004182640A JP4274056B2 (ja) | 2004-06-21 | 2004-06-21 | 小型アンテナ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006005860A true JP2006005860A (ja) | 2006-01-05 |
JP4274056B2 JP4274056B2 (ja) | 2009-06-03 |
Family
ID=35773835
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2004182640A Expired - Fee Related JP4274056B2 (ja) | 2004-06-21 | 2004-06-21 | 小型アンテナ |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4274056B2 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009100158A (ja) * | 2007-10-16 | 2009-05-07 | Nippon Soken Inc | アンテナシステムおよび車内用無線通信機 |
JP2009225433A (ja) * | 2008-02-18 | 2009-10-01 | Denso Wave Inc | Rfタグ読み書き装置 |
JP2010166480A (ja) * | 2009-01-19 | 2010-07-29 | Denso Wave Inc | Rfタグ読み書き装置 |
-
2004
- 2004-06-21 JP JP2004182640A patent/JP4274056B2/ja not_active Expired - Fee Related
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009100158A (ja) * | 2007-10-16 | 2009-05-07 | Nippon Soken Inc | アンテナシステムおよび車内用無線通信機 |
JP4572922B2 (ja) * | 2007-10-16 | 2010-11-04 | 株式会社日本自動車部品総合研究所 | アンテナシステムおよび車内用無線通信機 |
JP2009225433A (ja) * | 2008-02-18 | 2009-10-01 | Denso Wave Inc | Rfタグ読み書き装置 |
JP2010166480A (ja) * | 2009-01-19 | 2010-07-29 | Denso Wave Inc | Rfタグ読み書き装置 |
Also Published As
Publication number | Publication date |
---|---|
JP4274056B2 (ja) | 2009-06-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP4675894B2 (ja) | 周波数に依存しない放射特性を有した広帯域マルチダイポールアンテナ | |
US6759990B2 (en) | Compact antenna with circular polarization | |
KR101307113B1 (ko) | 원편광 루프 반사 안테나 및 그것의 제조 방법 | |
JP4108275B2 (ja) | 円偏波アンテナ | |
JP3734666B2 (ja) | アンテナ装置及びこれを用いたアレーアンテナ | |
US6888511B2 (en) | Physically small antenna elements and antennas based thereon | |
US8766866B2 (en) | Log periodic antenna | |
JP2006519545A (ja) | マルチバンド分岐放射器アンテナ素子(multibandbranchradiatorantennaelement) | |
US3745585A (en) | Broadband plane antenna with log-periodic reflectors | |
US4014028A (en) | Backfire bifilar helical antenna | |
Lee et al. | A wideband planar monopole antenna array with circular polarized and band-notched characteristics | |
JP4555019B2 (ja) | Uhf帯用広帯域アンテナ | |
US6154184A (en) | Antenna apparatus for portable phones | |
US4396920A (en) | Broad-band small-size radio-frequency antenna system | |
JP4274056B2 (ja) | 小型アンテナ | |
JP3804878B2 (ja) | 偏波共用アンテナ | |
JP2003163533A (ja) | アンテナ | |
JP2008288955A (ja) | アンテナ | |
JP4108246B2 (ja) | ループアンテナ | |
JP2006014152A (ja) | 平面アンテナ | |
JP3038205B1 (ja) | 導波管給電型平面アンテナ | |
Moallemizadeh et al. | Design of a novel compact cup feed for parabolic reflector antennas | |
JPWO2004004070A1 (ja) | アンテナ装置およびその指向性利得調整方法 | |
US11757187B2 (en) | Wide band directional antenna | |
JP2009055374A (ja) | アンテナ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20070423 |
|
RD01 | Notification of change of attorney |
Free format text: JAPANESE INTERMEDIATE CODE: A7421 Effective date: 20070514 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080318 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080421 |
|
A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20080722 |
|
A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20080822 |
|
TRDD | Decision of grant or rejection written | ||
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20090210 |
|
A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 |
|
A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20090223 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120313 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120313 Year of fee payment: 3 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130313 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20130313 Year of fee payment: 4 |
|
FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20140313 Year of fee payment: 5 |
|
LAPS | Cancellation because of no payment of annual fees |