Very Compact UWB Microstrip-Fed SlotAntenna with Band-Notched Function

In this paper, a very compact UWB microstrip-fed slot antenna with band-notched function is presented. The antenna basically consists of a radiating patch, connected to a 50Ω feed line to excite the rectangular slot on the ground plane. By removing of four notches from the rectangular patch and three semicircles from the ground plane, the bandwidth of the antenna is improved up to 168%. By the inclusion of two stubs in the ground plane, the band-notched property is obtained. The antenna covers the frequency range of 2.85 – 30 GHz for VSWR < 2, and rejects 5-6 GHz. For the fabricated antenna, omnidirectional pattern is observed over the UWB frequency spectrum