Background: A novel, small size, dual-band rectangular patch antenna with two narrow
vertical slots for Wireless Local Area Network (WLAN) and Worldwide Interoperability for
Microwave Access (WiMAX) application is presented here.
Methods: The proposed antenna, fed by coaxial line, has dimensions of 21.075 mm ×17 mm ×1. 6
mm. With a pair of vertical slots, the antenna is resonating in 3.5 GHz WiMAX and 5.3 GHz WLAN
band. The dimensions of the ground plane, substrate, radiating patch and two slots on the patch
antenna are optimized using Particle Swarm Optimization (PSO) to obtain the desired operating
Results: The proposed antenna shows good radiation characteristics at these two operating bands,
making it suitable for dual-band operation.
Conclusion: The same design with some different physical parameter may be suitable for other
kinds of wireless services. Further, application of Defected Ground Structure (DGS) to such models
may also provide better performance.