Development of Graphene Based Tapered Slot Antennas for Ultra-Wideband Applications

Abstract

Abstract-In this paper, three different types of graphene based tapered slot antennas are designed for ultra-wideband (UWB) applications. The taper profiles for three antenna types are linear, exponential, and constant width. A single layer graphene sheet of 35 µm thickness is used to model the radiating element and feeding structure of the designed antennas. To feed the antennas, microstrip to slotline transition technique is adopted. An approximate analytical theory based on conical transmission line model is considered to authenticate the design of graphene based tapered slot antennas. Better impedance matching over 2-20 GHz is obtained by designing a balun in the form of a radial stub. Return loss, bandwidth, radiation pattern, and directive gain are the considered antenna performance parameters. Time domain solver of CST MWS software is used to evaluate the performances of linearly tapered slot antenna (LTSA), exponentially tapered slot antenna (Vivaldi), and constant width slot antenna (CWSA). The results obtained from CST are compared with that from HFSS to further validate the design. Simulation results with extensive parametric study confirm that the novel 2-D material graphene can be considered as a promising one to model UWB tapered slot antennas. Furthermore, the effectiveness of designed graphene based tapered slot antennas is revealed by comparing their performances with other existing UWB antennas. Moreover, as a UWB application, Vivaldi antenna shows promising results in microwave brain tumor detection.

3D-Printed Graphene-Based Bow-Tie Microstrip Antenna Design and Analysis for Ultra-Wideband Applications

“…The frequency-dependent two-dimensional surface conductivity of single-layer graphene is expressed by the Kubo formula (Equation ( 1)) [33]:…”

Design and Implementation of Step-Constant Tapered Slot Antennas for UWB Application

“…The performance of proposed STSA has been analyzed comparing with the performances of other present UWB antennas and tabulated in Table 3. It is being observed from Table 3 that the STSA designed in this work, has provided the greater outcomes as compared to other UWB antennas reported in the literature [16]…”

“…To transmit a huge amount of digital data, ultra-wideband technology is used which has the ability over wide operating bandwidth with very low power emission for a short distance. The Federal Communications Commission (FCC) of USA provides UWB frequency range of 3.1 GHz to 10.6 GHz [16] [17]. The amount of radio frequency (RF) bandwidth (>500 MHz) that is achieved by the UWB system mainly maximizes its performance [16] [17].…”

“…The Federal Communications Commission (FCC) of USA provides UWB frequency range of 3.1 GHz to 10.6 GHz [16] [17]. The amount of radio frequency (RF) bandwidth (>500 MHz) that is achieved by the UWB system mainly maximizes its performance [16] [17]. However, a quality full communication system depends on antennas that can efficiently radiate and accept UWB signals.…”

Comparative Analysis on Antenna Balun and Feeding Techniques of Step Constant Tapered Slot Antenna

“…Due to the technological revolution, wireless communication is increasing at an exponential rate and the efficiency of the wireless system depends on these antennas that can efficiently radiate and accept UWB signals [21] [22] [23] [24] [25]. Tapered Slot Antenna was first introduced in 1979, and the basic three types of TSA antennas are linearly tapered slot antenna (LTSA), constant width slot antenna (CWSA), and Vivaldi antenna (VA) [26] [27] [28] [29] [30]. Tapered Slot Antennas are a traveling-wave antenna, whose voltage or current distribution can be represented by one or more traveling waves.…”