It is calculated as the ratio of the maximum directivity of the antenna to the directivity in the opposite direction.
To quantify FBR, a radiation pattern plot is drawn.
FBR = maximum radiation (dB) in the forward direction - maximum radiation (dB) at <math> 180^0 </math>
FBR is of course meaningless for omnidirectional antennas.
|Design||Beam * Dipole * Dish or Parabola * DDRR * Log Periodic (LPDA) * Loop * Mobile and portable * Omnidirectional * Panel * Quad and Quagi * Screwdriver * Small tuned loop * Vertical * Yagi-Uda * Wire and random wire antennas|
|Installation||Antenna Tuners * Capacity hats and loading coils * Cavity filters * Coaxial Cable * Feedlines * Rotators * Towers and Masts * VK2ACY - G5RV coupler|
|Theory||Front-to-back ratio * Impedance matching * SWR * Tower design * Vertical Antenna efficiency * Wire comparison tables|