International audienceIn this letter, a high-gain wideband antenna for 60 GHz wireless personal area networks is proposed. It consists of an inset-fed microstrip antenna with a partially reflecting surface (PRS) acting as a Fabry–Perot cavity. Good agreement was achieved between simulated and measured data, showing a wide bandwidth, covering two channels of the 60 GHz band and a maximum experimental gain of 16.4 dBi in the broadside direction at 60 GHz. The proposed structure meets the IEEE 802.15.3c standard requirements in terms of gain and bandwidth while the novel shape of the PRS array makes it smaller compared to existing 60 GHz Fabry–Perot antennas. Moreover, a low-cost printed circuit board technology is used to manufacture antenna prototype

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A high gain long‐read range metamaterial tag antenna for European UHF RFID applications is proposed and analyzed. It consists of a meander dipole tag antenna backed by a spiral shaped artificial magnetic conductor to increase the tag gain and hence its reading distance. A realized gain of 6.39 dB is achieved, with a total efficiency of 90% at 868 MHz. The overall structure size is (0.59λ0 mm × 0.289 λ0 mm × 0.065 λ0 mm). Three measurement scenarios are considered: in an anechoic chamber, laboratory corridor, and outdoor. A maximum reading range of 35 m is achieved outdoor and up to 46 m in corridor with no degradation when mounted onto a metal sheet. Moreover, the minimum activation power of the tag when attached to the metal surface is half the one when mounted alone. Furthermore, the via‐less structure is low cost and easy to fabricate. It is suitable for applications where the tag profile is not a critical parameter such as moving vehicles, road tolls, railroad cars, parking garages, aircraft, and cargo containers. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2944–2948, 2016

The use of radio frequency identification (RFID) at millimeter waves has led new applications such as high data rate short range communication, location sensing through narrow-beam antennas, and so forth. In this article, we present the design of an antenna operating in Ka band for RFID applications based on metamaterials. The frequency band of around 30 GHz, allowing a spectral width of 5 GHz, is a possible solution for the integration of radio frequency devices specially a notched patch antenna at 30 GHz with coplanar feed was designed and characterized. The measurements made with the HP 8510p XF network analyzer are consistent with the simulations using the electromagnetic simulation software CST-MW Studio. On this antenna, we used primarily a high impedance surface (HIS) to prohibit the propagation of waves. A partially reflective surface layer is added to this HIS-antenna to increase its directivity and widen the bandwidth. The latter has 225 dB of insertion loss with an impedance bandwidth of 1 GHz and a gain of 14.3 dB at 30 GHz.