UWB applications are being used in many industries today. These applications require low cost solutions with wide frequency band operations. Planar monopoles (realized by replacing the wire element of a conventional monopole with a planar element) are a family of antennas which are able to meet these specifications.
The antenna designed here is similar to the rectangular (trapezoidal) monopole in Antenna Magus. The addition of a monopole-to-ground shorting strip, and a beveled shaped cut-out increases the operating bandwidth of the standard rectangular monopole (2:1) dramatically. The shorting strip counteracts the reactive nature of the rectangular monopole by adding inductance/capacitance over the frequency range. The bevel shaped cut-out further reduces the low frequency reactive component. A good reflection response (below -8dB) across a bandwidth of 14:1 is achieved....VSWR comparison between different monopole topologies Total gain: 1.125fmin, 3fmin, 7.25fmin and 14fmin