281 / 2017-01-31 20:53:50

DGS based Planer UWB Antenna with Band Rejection Features

In order to eliminate interference due to existing
nearby communication systems within the ultra wide band
(UWB) operating frequency, a compact microstrip fed band
notched UWB patch antenna with band rejection features is
proposed. The dimension of antenna is 27 mm× 19 mm. The
planar UWB antenna is modified with a defective ground plane
to achieve band rejection. The antenna consists of a
rectangular patch etched on FR4 epoxy substrate (dielectric
constant 4.4 and height 1.5 mm) with partial ground plane and
50 Ω feed line. For improving the impedance matching over a
broad frequency range, the radiating patch has been
incorporated two rectangular slots diagonally. The simulated
result shows that the covered bandwidth at S11<-10 dB is 3.5-
8.7 GHz. After that, a DGS is incorporated at the UWB patch
antenna. This DGS notches the WLAN 5-6 GHz band
successfully. The VSWR of the band rejected antenna is less
than 2 except at the rejected band.