| Microstrip line-fed monopole slot antenna is studied in this thesis. This antenna is very compact in size and designed for very wide band operation, which will find applications in mobile handsets, PC cards for laptop computers etc. A monopole slot is cut on the center of a finite ground plane edge and fed by a microstrip line. This antenna has numerous parameters, which have effects on the operating frequency and impedance bandwidth of the antenna. The effects of these parameters are studied thoroughly. A bandwidth in excess of 50% can be achieved, if a proper stub tuning is done. This antenna has bi-directional radiation in one of the principal planes and omni-directional radiation pattern in the other. The space available in the ground plane, after the slot is etched, can be used by the electronic circuitry as electrical ground.; To reduce the antenna size, an L-shaped monopole slot is introduced, which shows an ultra wide impedance bandwidth. The radiation patterns are almost similar to those of the straight monopole slot. (Abstract shortened by UMI.)... |
