Effects of ground plane on a square graphene ribbon patch antenna designed on a high-permittivity substrate with PBG structures

Abstract

In this paper, a wide bandwidth (20 GHz) and small sized (200 × 200 × 50 µm3) terahertz (THz) square graphene ribbon antenna using Photonic Band Gap (PBG) substrate are investigated in the 0.6–0.8 THz band. The proposed antenna consists of graphene as radiating patch mounted on four types of ground plane. The important aim of this work is to eliminate the second resonance frequency by utilize a several types of ground plane and keep a single frequency by improving the performance of the proposed antenna. The effect of change ground plane on the performance of antenna is compared, in terms of reflection coefficient, bandwidth, directivity and radiation pattern. The antenna has achieved good gain (7.62 dB) and good directivity (6.38 dB) in comparison to work reported in the literature.

Design of High-Gain Antenna Arrays for Terahertz Applications

“…As shown in Table 2 , the designed antenna is compared with the related THz high-gain antennas in recent years. The Photonic Band Gap (PBG) structure is adopted in [ 35 , 36 , 37 ]. The curvature radius of PBG affects the gain and directivity of the antenna.…”

“…Figure 10 shows the radiation pattern of the antenna at 0.6366 THz, 0.6622 THz, and 0.6772 THz; Figure 10a,c,e is the XOZ plane, and Figure 10b,d As shown in Table 2, the designed antenna is compared with the related THz highgain antennas in recent years. The Photonic Band Gap (PBG) structure is adopted in [35][36][37]. The curvature radius of PBG affects the gain and directivity of the antenna.…”

“…In Reference [38], a new microstrip patch antenna array with a silicon-air photonic crystal substrate was formed by adding a through-hole structure to a uniform silicon substrate, and its performance was analyzed in the frequency range of 0.58~0.72 THz by suppressing the As shown in Table 2, the designed antenna is compared with the related THz high-gain antennas in recent years. The Photonic Band Gap (PBG) structure is adopted in [35][36][37]. The curvature radius of PBG affects the gain and directivity of the antenna.…”

Design of a High-Gain and Tri-Band Terahertz Microstrip Antenna Using a Polyimide Rectangular Dielectric Column Photonic Band Gap Substrate

“…This means that photonic band gaps (PBGs) are widely used in optical devices [21]. In order to design an excellent performance THz microstrip antenna, adopting the photonic band gap (PBG) substrate, which can be achieved by implanting different materials such as metallic, dielectric, and ferromagnetic in the substrate cavity, is an attractive method [22]. The PBG substrate has a unique characteristic called the frequency band gap, which can limit the propagation of electromagnetic waves within the band gap range by periodically varying the dielectric constant.…”