We have developed the Down tilt new type coaxial collinear antenna for mountain repeater stations and mountain mobile stations.
SPEC.
8 or more section is recommended
over‐the‐horizon communication: at least 6dB higher than other non-down tilt GP
Dip of angle 0°~-8°: To use downtilt efficiently, radiation with a tilt angle of -5 ° is not blocked in mountainous areas
対8段同軸コリニアアンテナ比 見通し距離外通信で最低∔6dB以上(実験値と理論値は一致した)
放射パターンは下図の通り(線は水平線)
8段同軸コリニア↓ 16段ダウンチルト同軸コリニア↓
SPEC.
8 or more section is recommended
over‐the‐horizon communication: at least 6dB higher than other non-down tilt GP
Dip of angle 0°~-8°: To use downtilt efficiently, radiation with a tilt angle of -5 ° is not blocked in mountainous areas
対8段同軸コリニアアンテナ比 見通し距離外通信で最低∔6dB以上(実験値と理論値は一致した)
放射パターンは下図の通り(線は水平線)
8段同軸コリニア↓ 16段ダウンチルト同軸コリニア↓
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左、20段ダウンチルト同軸コリニア 右、従来型8段同軸コリニア
left: 20Section downtilt coaxial collinear ,right: nomal 8Section coaxial collinear
left: 20Section downtilt coaxial collinear ,right: nomal 8Section coaxial collinear