New SRR/CSRR antenna dual Band-notch for WLAN and X Band Satellite communication

Abstract

This paper will propose an innovative compact, lowcost, low-profile inverted U-shaped patch antenna with a single and dual band-notched ultra-wideband (UWB) with split ring resonators (SRRs). To achieve our main goal based on the reduction of electromagnetic interference in narrowband communications (WLAN, WiMAX, and satellite), four-element rectangular split-ring resonators (SRRs) array are placed nearby the feedline to create notch band at approximately 5.15-5.35 and 5.725-5.85 GHz. The SRRs antenna's measured data indicate a directivity of 8.52 dBi, a gain of 7.18 dBi, a reflection coefficient of -27 dB, and an efficiency of 84.3%. The realized prototype, including the SRRs and CSRRs structures, were carried out using a PCB prototyping machine. Reflection coefficient measurement is obtained using a vector network analyzer (VNA) PNA-X from Agilent Technologies. The measured values of the proposed antenna, with 50 x 38 x 1.6 mm3 in total and constructed on a FR4 substrate with permittivity of εr = 4.3, loss tanδ = 0.0024 and substrate thickness of h = 1.6 mm, correlate well with the simulated values. The proposed antenna, compared with other published work, is a good candidate to operate in WLAN, X-band.Index Terms-split ring resonator (SRR); Ultra-wideband (UWB) antenna; WLAN; X-band. I. INTRODUCTIONInterest in ultra-wideband (UWB) systems has recently increased because of their low power consumption, affordable cost, high data throughput capabilities, little interference, and precise position.These systems have been allowed to operate in the 3.1 to 10.6 GHz frequency spectrum for UWB systems as written in [1]. On the other hand, narrowband systems operate within this frequency range.Consequently, UWB devices must avoid interfering with these narrowband systems; using a UWB antenna equipped with a band-reject capability solves this problem. Additionally, these systems need a short-size UWB antenna with a flat group delay [2]-[8].This article has merged a split ring resonator (SRR) that is sometimes called negative refractive index materials [9], [10]. SRRs are based on a couple of concentric annular rectangular rings with opposite ends, as shown in Fig. 1. Consequently, a magnetic field (H) vertically applied to the square ring surface will produce currents that will push out a magnetic field that may decrease or enhance the incident field,