High gain dual band slot antenna loaded with frequency selective surface for WLAN/fixed wireless communication

Abstract

This study shows the gain enhancement achieved through dual band slot antenna incorporated with dual band frequency selective surface. In order to do this, at first, a dual band novel 7 × 7 spanner shape FSS is designed, and its operations is analyzed by using the ray tracing method. The second step involves designing the dual band slot antenna resonating at 3.53 and 6.2 GHz, respectively. The designed FSS is then used as superstrate on the slot antenna in which cavity resonance occurs due to multiple reflections and leaked out waves, thereby enhancing antenna's gain significantly on both the bands. Further, the overall gain of slot antenna with the superstrate is achieved as 13.00 and 13.92 dBi on the 2 respective resonant frequencies; this in turn results in a gain enhancement of 8.0 and 6.82 dB at 3.53 and 6.2 GHz, respectively. The measured results coincide verifying the results of the simulated structure. This is followed by a parametric analysis for air gap between FSS and the radiating antennas, which in turn have been designed for wireless and satellite communications.

Multiband Stepped Antenna for Wireless Communication Applications

“…The radiation patterns were measured in an isolated anechoic chamber by using two antennas which are a double ridged horn antenna-model AH-118 (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18) GHz and the fabricated antenna. Figure 9 and 10 show, respectively, the normalized co-polarization and cross polarization radiation patterns in both orthogonal planes at three different frequencies from the operating ranges: 1.99 GHz, 6.2 GHz, and 10.33 GHz.…”

“…Thus, there are strong demands to design multipurpose antennas which should ensure a multiband operation with suitable characteristics, such as: compact structure, low manufacturing cost, low-profile, easy integrating circuit boards and good radiation performances over the working bands [5][6]. Until now, with the use of a variety of techniques, various types of multiband antennas have been presented in the literature for many wireless communication systems application such as those proposed in [5][6][7][8][9][10][11][12][13][14]. Among of usual employed techniques to produce multiband function in broadband antennas included the technologies: fractals [7][8][9], multilayer [10][11], meta-materials [12], stubs loaded [13], slot-etched [14], loading the matching network [15], and radiators coupling [16].…”

“…In [9], a multiband antenna for mobile terminals application has been proposed; it has large dimensions and uses a complicated binary tree fractal bionic structure to produce only a dualband function. Whilst, a complex multilayer design constructed by periodic structures has been reported in [10] for dual-band application; its big size is another main drawback. A very selective antenna has been proposed in [11] for LTE-R and 5G lower frequency operations.…”

A wideband high gain trapezoidal monopole antenna backed by frequency selective surface

“…This AMC produces a gain enhancement of 4 dBi in 1.5–2.2 GHz band. In Reference 14, a dual‐band FSS is employed as superstrate for gain enhancement of a slot antenna. This FSS based spanner shape achieves by 13 dBi at 3.53 GHz and by 13.92 dBi at 6.2 GHz.…”

Dual-band B-shaped antenna array for satellite applications

“…A 3 × 2 folded dipole antenna array was proposed in [30] for dual-band operation in WLAN and WiMAX bands. A 7 × 7 spanner-shaped FSS was designed and placed over a slot antenna for dual-band behavior at 3.5 and 6.2 GHz [31]. A dome-shaped antenna array was discussed in [32] for dual-band operation at 5.8 and 7.8 GHz.…”