front-to-back ratio

英 [frʌnt tu bæk ˈreɪʃiəʊ]

美 [frʌnt tu bæk ˈreɪʃioʊ]

前后比；（定向天线的）方向性比; 方向性比；前后不一致比

In the cellular mobile communication system, the base-station antenna often consists of a linear array antenna backed by a reflector, and the reflector mainly affects the characteristic of front-to-back ratio and the radiation pattern in the horizontal plane.
蜂窝移动通信系统中的基站天线通常由直线阵列加反射板构成，而反射板的形状主要影响天线的前后比特性及水平面辐射方向图。
With TV channel 2 as example, narrow performance of small size Yagi antenna front-to-back ratio F/ B and method used to expand the F/ B bandwidth has been analyzed.
以二频道为例，分析了小尺寸八木天线前后比F／B的窄带性及展宽频带的方法。
Forth, we present a design technique for directional gain enhancement in low profile tapered slot antennas; we study along a yagi-like dual tapered slot antenna ( DTSA) which features high gain, high front-to-back ratio and broadband characteristics with a short taper profile.
第四，我们提出了渐变槽天线定向增益增强的设计方法。我们同时研究了具有高增益，高前后比和宽带的Yagi形双锥形槽（DTSA）天线。