Abstract— Use of discontinuities in ground planes or in
microstrip lines is currently employed to improve the
performance of different passive circuits. It includes size
reduction of amplifiers; enhancement of filter characteristics
and applications to suppress harmonics in patch antennas.
This paper presents an improved method of size reduction of a
microstrip antenna using Defected Microstrip Structure. It
does so by introducing imperfections in the microstrip antenna
on the conducting layer using a DMS designed defect. The
design was simulated using IE3D Electromagnetic Simulator.
The results are very encouraging as it increases the number of
components in a given constant area. On the other hand, a new
proposal, called defected microstrip structure (DMS), has been
successfully used in reducing the size of, and can be further
used as tuning technique for, rectangular patch antennas.