A Duplex Patch Antenna with High Radiation Gain

Abstract

In modern communication and mobile communication, duplex patch antennas have been widely used for their outstanding performance at low cost, low profile, and small scale. In this paper, a duplex patch antenna is presented. The ground plane's size and shape and the defected ground structure (DGS) could be flexibly adjusted to change the resonant frequency bands of the windmill-shaped patch antenna although the patch is fixed. The windmill-shaped antenna achieves a short distance between the two bands for f1 =3.4GHz and f2=3.6GHz with high gain in 5.61dBi and 4.08dBi in a compact size (43.75mm*43.75mm*1mm). For validation, the two antennas are manufactured and measured after being fully simulated.