Rectangular patches loaded high gain antenna for tri-band applications using coaxial probe feed technique

The present work deals with the design and development of a novel Quadruple-rectangular patch loaded high gain antenna with triple band characterisitcs. The antenna is developed using co-axial feed method making it suitable for mounting on planar surfaces with less spurious radiaiton effects. The developed antenna covers the operating bands 9 GHz, 11 GHz and 12.2 GHz with good reflection properties. The main advantage of the presented antenna is giving a good amount of peak gain around 9 dBi at 11 GHz using a comapct substrate of dimensions 34x34 mm(2). The surface current distributions of the proposed antenna at various frequencies are given. Also, stable radiaiton patterns with good boresight gain properties are obtained at the three operating bands making the antenna suitable for X- band wireless applications like defense tracking, air traffic control, weather monitoring etc.