DESIGN OF COMPACT MICROSTRIP PATCH ANTENNA

Abstract

The concept of microstrip radiators was proposed in 1953.However, 20 years passed before practical antennas were fabricated. Development during the 1970s was accelerated by the availability of good substrates with low loss tangent and attractive thermal and mechanical properties, improved photolithographic techniques, and better theoretical models. Since then, extensive research and development of microstrips antennas and arrays ,aimed at exploiting their numerous advantages such as light weight, low volume, low cost, conformal configuration, compatibility with integrated circuits, and so on, have to diversified applications and to the establishment of the topic as the separate entity with in the broad field of microwave antennas. The paper used for implementation presents a novel design of triangular microstrip antenna with dual frequency operation. In this design the microstrip patch is short circuited using a shorting pin & fed by a single probe feed. By varying the shorting pin position in the microstrip patch, such a design can provide a large tunable frequency ratio of about 2.5-4.9 for the two operating frequencies. Experimental results are presented & discussed. 4