JP2005167950A - ノイズ測定用多素子アンテナ - Google Patents
ノイズ測定用多素子アンテナ Download PDFInfo
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- JP2005167950A JP2005167950A JP2003436038A JP2003436038A JP2005167950A JP 2005167950 A JP2005167950 A JP 2005167950A JP 2003436038 A JP2003436038 A JP 2003436038A JP 2003436038 A JP2003436038 A JP 2003436038A JP 2005167950 A JP2005167950 A JP 2005167950A
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Abstract
【解決手段】 ログペリオディックアンテナとループアンテナを誘電体基板で合成させただけの従来のアンテナでは,現地で必要なVHF帯とUHF帯の周波数に対する感度特性を均一化できず,携帯に便利でかつ片手で測定できるログペリオディックアンテナとループアンテナの外形が同程度の合成した大きさとなると,ループアンテナが分担する低い周波数が著しく感度が低くなる。これを避けるため,中心層にアースとなるエレメントを挿入させ3層のログペリオディックアンテナの構造にして,ストリップ線路の波長短縮効果によって,感度を低周波数の方へシフトさせ,全体的に周波数に対する感度を均一化させている。
【選択図】 図1
Description
2 表面のログペリオディックアンテナエレメント
3 中心層にある伝送線路を中心に左右対称にアンテナエレメントを増設したアース面の機能を持つストリップ線路
4 抵抗素子
5 裏面のログペリオディックアンテナエレメント
6 ループアンテナ
7 バラン
8 同軸ケーブル
9 規格測定用大型アンテナの感度特性
10 ノイズ測定用多素子アンテナの感度特性
11 規格測定用ホーンアンテナのギガ帯の感度特性
12 ノイズ測定用多素子アンテナのギガ帯の感度特性
13 ノイズ測定用多素子アンテナの100MHzでの指向特性
14 ノイズ測定用多素子アンテナの800MHzでの指向特性
15 高周波ウェルダのフィールドテストでの理論的な距離減衰特性
16 高周波ウェルダのフィールドテストでの発生電界の距離減衰特性
Claims (2)
- ログペリオディックアンテナパターン形成に3層の誘電体基板を使用し,中心層はアース面の機能を持たせるため,伝送線路に対して左右対称にアンテナエレメントを増設させてストリップ線路を形成させ,アンテナパターンとアース面は,抵抗素子で接続した3層ログペリオディックアンテナと,誘電体基板の両面にループアンテナパターンを形成したもの2枚を,蝶羽根状に向かい合わせバランで合成した蝶羽根ループアンテナの中心位置上に,3層ログペリオディックアンテナを組み合わせて,一体化構造を介しての特徴を持つノイズ測定用多素子アンテナ。
- 前記一体化構造は,該3層ログペリオディックアンテナと該蝶羽根ループアンテナとに分割しても,おのおのアンテナの機能を発揮できることを特徴とする請求項1記載のノイズ測定用多素子アンテナ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003436038A JP4125671B2 (ja) | 2003-11-28 | 2003-11-28 | ノイズ測定用多素子アンテナ |
Applications Claiming Priority (1)
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JP2003436038A JP4125671B2 (ja) | 2003-11-28 | 2003-11-28 | ノイズ測定用多素子アンテナ |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2005167950A true JP2005167950A (ja) | 2005-06-23 |
JP4125671B2 JP4125671B2 (ja) | 2008-07-30 |
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Application Number | Title | Priority Date | Filing Date |
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JP2003436038A Expired - Fee Related JP4125671B2 (ja) | 2003-11-28 | 2003-11-28 | ノイズ測定用多素子アンテナ |
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JP (1) | JP4125671B2 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022152025A (ja) * | 2021-03-29 | 2022-10-12 | 日本電気株式会社 | アンテナ装置 |
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2003
- 2003-11-28 JP JP2003436038A patent/JP4125671B2/ja not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2022152025A (ja) * | 2021-03-29 | 2022-10-12 | 日本電気株式会社 | アンテナ装置 |
JP7285421B2 (ja) | 2021-03-29 | 2023-06-02 | 日本電気株式会社 | アンテナ装置 |
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JP4125671B2 (ja) | 2008-07-30 |
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