Inverted-V Antenna

The inverted-v antenna is almost identical to a half wave dipole antenna. The exception is that the end of the antenna are sloping towards ground. Often this kind of antenna is used in portable wire-antenna setups where only the feed point is required to rise high over the ground with a mast pole or by using a tree. The ends are then tied near ground level. Technically, the inverted-V antenna length is reduced by 2-5% compared to a normal dipole. The impedance is also slightly lower, closer to 50 ohms. But as always, the antenna height over ground, antenna materials etc. will have an effect, so this calculator will not give an exact measure. You have to tune the lengths by trial and error.