The bandwidth of an antenna is the band of frequencies, over which it is
considered to perform acceptably. The wider the range of frequencies a band
encompasses, the wider the bandwidth of the antenna. The formula for bandwidth
is shown in Figure
.
Antennas are ordered pre-tuned by the manufacturer, for use in a specified
band segment. The trade-off in designing an antenna for a wider bandwidth is
that it would generally not have as good of performance in comparison to a
similar antenna that is optimized for a narrower bandwidth.