• 作者： 翁金輅;黃廣志
• 作者服務機構： 國立中山大學電機工程學系
• 中文摘要： 在螺旋天線的導體內側加上－接地金屬圓筒，中間以－介電質隔開，再藉由調整導體與圓筒間之距離，可調整兩者之間的電容。此時，螺旋天線將具有傳輸線之基本特性，而具有一特性阻抗。此一特性阻抗可被調整至與外接傳輸線之特性阻抗相等。此時，此種結構形成一種新型的自身匹配之螺旋天線。此種天線應用在軸向指向性電波放射的設計，將在本文中提出。此種天線，其體積遠較一般傳統的螺旋天線來得小。同時，因為天線本身阻抗相等於外接電路之阻抗，所以匹配問題更不需考慮。
• 英文摘要： The design for the coil section of a helical antenna to be transformed into a slow wave section havinga transmission line stucture by placing a ground cylinder on the inner side of the coil section and inserting adielectric sheet between the coil and the ground cylinder is proposed. This arrangement produces a noveltype of self-matched helical antenna. The application and design of such an antenna to be excited as abeam antenna are presented. This self-matched helical beam antenna has the advantages of much smallersize and self-matching as compared with the ordinary helical beam antenna.
• 中文關鍵字： helical beam antenna; self-matched
• 英文關鍵字： --