... 角小的天线，郊区选用水平平面的半功率角大的天线；垂直平面的半功率角（V-Plane Half Power beamwidth）: 1.5 前后比(Front-Back Ratio) 增益Gain ...
基于108个网页-相关网页
front-to-back ratio 前后比 ; 方向性比 ; 天线前后比 ; 正反向比
back-to-front ratio 正反比 ; 反 ; 后前比
front to back ratio 方向性比 ; 前后比
back front ratio 后前比
front-to-back ratio of antenna 天线前后向防卫度
The difference between the front and back bulge edges results in pressure drag which increases with increasing bulge density and height, and with decreasing duty ratio.
结果显示，由于矩形形貌的影响，形成了压差阻力，压差阻力随形貌突起高度或密度的增加而增大，随突起占空比的增加而减小。
High gain and excellent front-o-back ratio so that UHF can be received consistently.
高增益和较大的前后比使UHF信号被极好地接收。
应用推荐