Compact planar G-shape UWB antenna with notch characteristics for satellite communication

Abstract

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.

Inverted Diamond-shaped Notched Substrate and Patch for High-frequency Interference on Ultra-wideband Antenna

“…The UWB technology provides a high data rate, large channel capacity, and stable radiation pattern for radio communication [6]. However, using high data rate to transmit information makes UWB systems highly sensitive to interference with the existing bands [4], such as WiMAX (3.3-3.7GHz), WLAN (5.15-5.85GHz), and downlink X-band satellite system (7.25-7.75GHz) [3], [4], [6]. Figure 1 illustrates the UWB bandwidth with the existing bands shared the same spectrum frequencies .…”

“…The most efficient and easiest method to reduce this electromagnetic interference (EMI) is described by attaching a geometrical notch filter to an antenna [7]. To reduce EMI, the researchers introduced many notched shapes, such as I, C, and L shapes [3], [4], [6]. In [8], small open-end slots to reject an interfered band at a high frequency of 7.5GHz are demonstrated.…”