JP4274056B2 - 小型アンテナ - Google Patents
小型アンテナ Download PDFInfo
- Publication number
- JP4274056B2 JP4274056B2 JP2004182640A JP2004182640A JP4274056B2 JP 4274056 B2 JP4274056 B2 JP 4274056B2 JP 2004182640 A JP2004182640 A JP 2004182640A JP 2004182640 A JP2004182640 A JP 2004182640A JP 4274056 B2 JP4274056 B2 JP 4274056B2
- Authority
- JP
- Japan
- Prior art keywords
- reflector
- antenna
- wavelength
- radiator
- operating frequency
- 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 - Fee Related
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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 (1)
- 電界方向と平行に動作周波数における1/2波長近くの間隔を離して配置した一対の放射素子と、前記一対の放射素子を接続する平衡線路とアンテナ出力コネクタとに接続された同軸給電部を持つ放射器と、
前記電界方向の寸法が前記動作周波数における1/2波長より短く、かつ、前記電界方向に垂直方向の両端の幅が中央部幅より大きくなるように中央部に切欠きがある板状の導体よりなる反射器と、
前記放射器と前記反射器とを、前記動作周波数における概ね1/4波長の距離に保つ保持手段とを備え、
前記反射器において、前記電界方向の寸法と前記電界方向に垂直方向の端の幅との合計が動作周波数における1/2波長以上である小型アンテナ。
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 JP2006005860A (ja) | 2006-01-05 |
JP4274056B2 true 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 |
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JP (1) | JP4274056B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
JP4989662B2 (ja) * | 2008-02-18 | 2012-08-01 | 株式会社デンソーウェーブ | Rfタグ読み書き装置 |
JP4989663B2 (ja) * | 2009-01-19 | 2012-08-01 | 株式会社デンソーウェーブ | Rfタグ読み書き装置 |
-
2004
- 2004-06-21 JP JP2004182640A patent/JP4274056B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JP2006005860A (ja) | 2006-01-05 |
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