Design and Performance Evaluation of a Compact Frequency-Reconfigurable Coplanar-Waveguide-Fed Slotted Patch Antenna for Multi-Band Wireless Communication

A miniaturized and low-profile planar antenna is a crucial part of any wireless communication system. To cover additional narrowband services and to reduce system complexity, antennas in portable devices should offer several operating bands. In this paper, we propose a coplanar-waveguide-fed (CPW-fed), flexible, and compact slotted patch frequency reconfigurable antenna with a compact size of 20 x 24 mm2. The designed antenna employs a low-cost Rogers 5880 substrate with a thickness of 0.127 mm. This choice of substrate ensures cost-effectiveness while preserving the desired performance of the antenna. The antenna radiates through five distinct frequency bands, including 5.58-6.25 GHz, 6.05-8.81 GHz, 8.79-9.7 GHz, 9.7-10.22 GHz, and 10.48-15 GHz, depending on the switch on/off condition, thereby enabling the antenna to span a broader range of frequencies for WLAN, C-UWB, sub-6 GHz, and X-band communications. The designed antenna is fabricated and tested in both the on and off states. The measured results closely match the simulated outcomes.