A Planer CPW fed UWB monopole antenna with triple band notch characteristics is presented in this paper. Modal analysis of band-notched UWB antennas illustrates the existence of resonant modes linked to the embedded narrowband slot structure (slot modes), whose location within the planar geometry of the monopole determines the effect over the rest of the radiating modes of the wideband structure, and consequently, over the behavior of the antenna. The proposed antenna could potentially mlDlmlze frequency interference from many underlying technologies i.e. WLAN, WiMAX and Aeronautical mobile bands. The U slot that is etched out from the radiator results in creating band notch centered at 3.5GHz and 10.5 GHz. The band notch centered at 5.5GHz is obtained by L shape slots etched from the ground plane. The dimensions of proposed antenna are 45 mm x 41 mm x 0.762 mm and the proposed antenna is realized on Taconic substrate with &,. = 2.2. The impedance bandwidth of the proposed antenna covers the frequency range from 2.8 GHz to 12 GHz. The simulated gain is 4.93dBi.

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In this paper the antenna designing is shown for a compact nature and co-axial fed for Ultra Wide Band (UWB) applications. The antenna has been designed by introducing some slots on the radiating patch and some slots on the ground plane. FR4 substrate has been used here with a dielectric constant of 3.4. The ultra wide band of the antenna ranges from 2.70 GHz to 6.40 GHz (Bandwidth of 3.70 GHz). The minimum return loss observed here is -37.05 dB in the resonating frequency of 3.30 GHz. So the percentage bandwidth is 112 %. The maximum gain achieved here is 4.0 dBi at 5.80 GHz.

In this paper, a compact G-shape, ultra wide band microstrip fed antenna with band notch characteristics of satellite communication is proposed. The proposed antenna of a circular slot cuts in the patch to achieve a band notched characteristics in the satellite communication band (7.25-7.825 GHz). The antenna, which occupies a size of 45 × 36 × 1. 6 mm 3 . Surface current distribution to analyze the effect of slots. The gain of the proposed antenna varies from 0.5 dBi to 6.0 dBi. The group delay is found within 1ns expect notch band.

This paper presents the design of a compact planar monopole antenna with triple band notched characteristics. The inverted U type slot in the patch results in rejection band centered at 5.5 GHz. A hairpin slot in the feed line leads to good suppression at 6.8 GHz and rejection band centered at 8.1 GHz is obtained by etching out incomplete inverted C type slots. The peak gain obtained is 4.3 dBi. The group delay shows a flat response lying within Ins except at the notch frequencies.