Compact Modified Hexagonal Spiral Resonator Based Tri-Band Patch Antenna With Octagonal Slot for Wi-Fi/Wlan Applications

Abstract

In this paper, a compact modified hexagonal spiral resonator-based tri-band patch antenna with an octagonal slot is presented for Wi-Fi/WLAN applications. The proposed antenna is designed on a low-cost FR4 substrate with a dielectric constant of ε r = 4.4 and a loss tangent of δ = 0.02. The tri-band operations have been achieved by a Modified Hexagonal Complementary Spiral Resonator (MHCSR) and an Octagonal slot. The loading of the MHCSR at the bottom of the substrate is to cover the 900 MHz (IEEE 802.11ah) band, and an Octagonal slot on top of the 5 GHz (IEEE 802.11a/h/j/n/ac/ax) rectangle patch is to cover the 2.4 GHz (IEEE 802.11b/g/n/ax) band. The prototype of the proposed antenna is fabricated and tested to validate the simulation results. The measured impedance bandwidth is 105 MHz at 900 MHz, 160 MHz at 2.4 GHz, and 180 MHz at 5 GHz. The designed antenna has a compact size with overall dimensions of 0.054λ 0 × 0.066λ 0 × 0.0048λ 0 (18 × 22 × 1.6 mm 3). The 82.2% reduction in size has been accomplished as compared to a conventional patch antenna at 900 MHz (lower resonance frequency). The waveguide setup method has been used to validate a negative permittivity property of the MHCSR. The parametric analysis of the proposed antenna has been carried out using the Ansoft HFSS19 software.

Wideband CPW-Fed Oval-Shaped Monopole Antenna for Wi-Fi5 and Wi-Fi6 Applications

“…3. The proposed antenna is very thin and can be used in next-generation wireless devices (with slim characteristics) as it has less thickness (low in profile) than [1][2][3][4][6][7][8][9][10][11]]. 4.…”

“…Several antenna design techniques that exhibit multiband or wideband operations have been reported in the literature [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] for wireless applications. Amid these designs, dielectric resonator antennas (DRAs) are very popular as they offer high dielectric strength and no inherent conductor loss, which results in better radiation efficiency.…”

“…To maintain a compact size antenna for multiband operations, the design method known as Complimentary Split Ring (CSR) is widely used in antenna design. In [3], CSR has been applied to achieve multiband operations across the (842-947 MHz), (2.3-2.46 GHz), and (4.98-5.16 GHz) bands. To further achieve small sizes with omnidirectional patterns, a half-wave dipole fed by microstrip balun that has dimensions of 50 × 10 × 1 mm 3 operating in the WiFi bands of (2.24-2.7 GHz) and (4.73-5.6 GHz) has been studies in [4].…”

“…To achieve very small dimensions of 17.5 × 8 mm 2 , Reference [6] has presented a simple multifrequency monopole antenna operating in 2.4 GHz, 3.3 GHz, and 5.8 GHz bands. Notably, the antenna designs reported in [1][2][3][4][5][6] do not cover the complete Wi-Fi 5 bands. Even though the patch antenna design in [7] has a size of 34.6 × 33.05 × 1.57 mm 3 and can cover the entire Wi-Fi 5 band, the design has used an expensive Roger substrate to fabricate the antenna.…”

Hexagonal Split Ring Resonator Enclosed Circular Split Ring Resonator Inspired Dual-Band Antenna for Sub-6 GHZ 5g Nr and Ieee 802.11BA/BE Applications

“…A hexagonal split-ring metamaterial-inspired dualband antenna [11], a circular CSRR inspired cross-shaped dual-band antenna [12], and a triangular SRR metamaterial-inspired dual-band antenna [13] are designed for WLAN applications. An SRR inspired antenna [14], an electric LC loading based on Koch shaped fractal metamaterial antenna [15], a metamaterial slot inspired substrate waveguide antenna [16], a complementary capacitive-loaded loop antenna [17], a metamaterial with ELC and EBG loading antenna [18], a metamaterial inspired mushroom loaded antenna [19], a dumbbell shaped metamaterial inspired antenna [20], and a modified complementary hexagonal spiral resonator inspired antenna [21] have been realized for multiband performances, which are not focused on specific applications. A narrow-band single-loop resonator integrated monopole antenna is presented [22].…”