Design of an UWB antenna with truncated ground plane

In this paper, the concept of strip lined truncated ground plane with Inset Fed slotted Microstrip Patch Antenna is used. A slot of 0.85 × 0.07 cm² is cut within the radiating patch at a distance of 0.12cm from the ends of the patch, on either sides, due to which return loss decreases below -45 dB at 11.5GHz. The developed antenna operates at an UWB frequency of 10 GHz-14.5 GHz with a bandwidth of 4500 MHz or 39% at the center frequency of 11.5 GHz and has a VSWR of less than 2 over the entire operating band. A maximum gain of 4.4 dB is obtained with almost a complete Omni-directional radiation pattern and does not require additional impedance matching circuitry. The results show that the Proposed antenna (with slots on either sides of patch) has a return loss of-47 dB at 11.5 GHz. The design and simulation of the antenna structure is carried out in HFSS version 13.