Design of a Very Compact UWB Monopole Antenna with Microstrip‐FED

The article presents the design of a compact ultrawideband (UWB) monopole antenna with microstrip-fed. The antenna has a simple elliptical-shaped radiator. The very compact size of 11 × 34 = 374 mm2 and wide bandwidth of 3.1–12.6 GHz are achieved by simply using a three-step staircase on both sides of the feed line and a slot on the ground plane. The antenna is studied and designed on a Rogers substrate using computer simulation and measured using Satimo Starlab system. The effects of feeding cable used in measurement are also studied. Simulated and measured results agree very well. Results show that the antenna has a wide bandwidth, stable realized gain and efficiency, and very stable radiation patterns across the UWB from 3 to 12 GHz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2232–2236, 2013