摘要
本文讨论了一种新型全向宽频带超短波印刷天线。利用设计天线辐射体的外形尺寸和债电处接地体的阶梯渐变结构来改变分布电容，达到阻杭匹配的目的。在５０ＭＨＺ频带内驻波比小于１．２，在使用频段１５ＭＨＺ频带内驻波比小于１．１。采用十字形馈电方式，利用两直立板状辐射体形成腔体传输水平极化分量，两极板构成直立天线对，使天线的方向图为半球状。采用这种设计方法可减小天线的尺寸。
A new printed UHF antenna with omnidirectional radiation and broad band is discussed in this paper.The distributed capacitance can be changed by means of designing the size of radiator and step-change outer of ground wire in feed part.The V.S.W.R of the antenna is less than 1.2 in 50 MHz bandwidth and less than 1.1 in 15MHz bandwidth that is used to communication and video transmission.The antenna can be made up small size with the structure.In recent years,Uar mobile radio systems have been developed rapidly.Various UHF spotal communication nets and common communication nets becoming more and more.Bother data transmiSSion and video transmission azquire the antenna that has omnidrectional radiation and broadband.Whip antenna has omniditectional radiation in azimuth and its radiation is 0 in about 90°angle of elevation.It is not suited to G/A communication.The band of whip antenna is narrow to video transmission.The printed pntenna with H form is used to communication not only small for be also broadband.It bas omnidirectional radiation property in three-demensional space.The antenna is suited to communication and video transmission in mountain area and G/A.
出处
《电波科学学报》
EI
CSCD
1996年第2期67-69,80,共4页
Chinese Journal of Radio Science
关键词
超短波
印刷天线
宽频带
H形天线
阻抗
全向辐射
Printed antenna,Broadband,H shape antenna.Impedance,Omnidirectional radiation
