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GPRシステム用のコンパクトな開口スロット型アンチポダルヴィヴァルディアンテナ
Feng Shen1, Ninghe Yang2, Chao Xia1
1School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.
Sensors (Basel, Switzerland)
|February 13, 2026
まとめ
この研究では,地面貫通レーダー (GPR) 用のコンパクトな反足形ヴィヴァルディアンテナ (AS-AVA) が導入されています. この新しい設計は,ポータブルGPRシステムにとって極めて重要な,超幅帯域の動作と安定した放射線を達成します.
科学分野:
- 電気磁気とアンテナ工学
- レーダーシステムと信号処理システム
背景:
- 3GHz未満のGround-Penetrating Radar (GPR) のアンテナを小型化することは,波長の制約のために困難であり,しばしばインペダンスの不一致と不安定な放射線を引き起こす.
- 既存のコンパクトアンテナは,ポータブルおよび空中のGPRアプリケーションの要件を満たすために苦労しています.
研究 の 目的:
- 3GHz以下の周波数で安定した放射線と超幅帯域の動作のために設計された,コンパクトな開口スロットアンチポダルヴィヴァルディアンテナ (AS-AVA) を提示します.
- ミニチュライゼーションと性能に焦点を当てた共同設計戦略を通じて,コンパクトなGPRプラットフォームにアンテナの適性を実証する.
主な方法:
- 放射線安定性主導の共同設計戦略を使用してコンパクトなAS-AVAを設計しました.
- 低周波性能を向上させるため,曲折したアパートルスロット電流経路エンジニアリングが組み込まれています.
- エッジ電流を制御し,サイドロブを抑制するために,傾斜した長方形のスロットを使用しました.
- 阻力精製のためにバックロードされた寄生パッチを使用した.
主要な成果:
- FR-4プロトタイプで0.63から2.03GHz (105.26%の断片帯域幅) までの -10dB以下の測定S11を達成しました.
- 観測された安定した遠場放射線パターンは,実感された増幅が2.1dBiから7.5dBiに増加した.
- 0.6-2.1 GHzで4〜8nsのグループ遅延で良好なタイムドメイン忠誠性を実証しました.
- ステップ周波数連続波 (SFCW) GPRテストベッドでアンテナの性能を検証し,埋もれた標的の明確なシグネチャを生成します.
結論:
- 提案されたAS-AVAは,小型化,ブロードバンドインペダンスのマッチング,放射線の安定性との間の実用的なバランスを提供します.
- このアンテナは,コンパクトな3GHz未満のGPRシステムに適しており,効率的な地下イメージングを可能にします.
- 設計の進歩は,より有能なポータブルおよび空中GPRプラットフォームの開発に寄与します.
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