用于电视接收的最基本天线是半波偶极天线。由于与其它种类电视天线相比,半波偶极天线是基本天线,它的增益被看作是1。无论它是靠近电视发射塔,还是距发射塔30或40英里,其增益相同,均视为1。这并不意味着半波偶极天线总能接收到同样大小的信号,也不是指它的输出总是50μv,50Oμv,5000μv或某些其它 The most basic antenna for television reception is a half-wave dipole antenna. Since the half-wave dipole antenna is a basic antenna compared to other types of television antennas, its gain is taken as one. Whether it is close to the television tower, or 30 or 40 miles from the tower, the same gain, are considered as 1. This does not mean that a half-wave dipole always receives the same amount of signal, nor does it mean that its output is always 50μv, 50μμv, 5000μv, or some other