Highly directive ISM band cavity antenna using a bi‐layered metasurface reflector

Abstract

International audienceThe design of a highly directive metamaterial-based cavity antenna for a 2.46 GHz application is reported. The proposed structure. is evolved from a Fabry-Perot (FP) cavity with a patch antenna acting as the feed and four metallic walls on the lateral sides. One of the two reflectors is the antenna's ground plane and the other is made from a bilayered metamaterial-based partially reflecting surface (PRS) constituted by a capacitive and an inductive grid. Calculations together with experimental results obtained from the fabricated prototype are presented. The results show a high directivity and low levels for the secondary lobes compared to a 2 X 2 patch antenna array. (c) 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 1393-1396, 2009: Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.2439

Bandwidth and Gain Enhancement of Microstrip Patch Antennas Using Reflective Metasurface

“…The 3-dB gain bandwidth is 13% from 2.3 GHz to 2.6 GHz, which is also much wider than that of the antenna without the RMS and with the 4 × 4 DSR as the RMS [17]. Compared with [24], which is designed at the same center frequency (2.45 GHz) and the same ground plane size (200 mm × 200 mm), our antenna has wider impedance and gain bandwidths. Antenna performances of the three different configurations, the MPA-alone, the MPA with the 4 × 4 DSR as the RMS and the MPA with the 4 × 4 DCR as the RMS, are tabulated in Table 1.…”

Metasurfaces for High Directivity Antenna Applications

“…The metallic cavity is composed of the feeding antenna's PEC ground plane and a metamaterial-based PRS as reflectors. Furthermore, four metallic walls are also fixed on the lateral sides so as to enhance the directivity of the cavity antenna while keeping low lateral dimensions (Burokur et al, 2009a). www.intechopen.com…”

Manipulating the reflection of electromagnetic waves using reflective metasurfaces

“…Metasurfaces are the planar version of metamaterials that are engineered to control and tailor EM waves in unconventional ways. Due to their sub-wavelength nature, metasurfaces enable us to manipulate EM waves in small scales [9][10][11][12][13][14][15][16]. Hence, metasurfaces own great application values in perfect absorber [9,10], miniatured frequency selective surfaces [11], high directivity antennas [12,13], ultra-thin cloaks [14] etc.…”