DESIGN AND DEVELOPMENT OF AN ULTRA-WIDEBAND MICROSTRIP PATCH ANTENNA FOR INDUSTRIAL, SCIENTIFIC AND MEDICAL BAND APPLICATIONS.

Abstract

The past decade has seen a rapid development in wireless communication systems. This continuous trend is bringing about a wave of new wireless devices placing several demands on the antenna such as size miniaturization, power consumption and simplicity, unlike the bulky parabolic antenna that occupy space.  Due to compact size of the microstrip antenna, it can easily integrate into wireless communication devices. This work aimed at improving the system capacity using ultra-wideband microstrip patch antenna for industrial, scientific and medical (ISM) band applications. To achieve this goal, an appropriate substrate for the microstrip was determined for low dielectric loss and moisture absorption. The parameters of the antenna design was determined for a good reception and performance. Etching of the substrate was done to remove unwanted deposits. Thereafter, a coaxial to microstrip transition model was developed for feed network. The performance of the antenna in respect to return loss, voltage signal wave ratio, frequency, gain, directivity and network performance was measured.  The system performed well in the ISM band having compatibility with printed-circuit technology, light weight, lower return loss and good radiation properties