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In this paper the design and experimental validation of a 2×1 linearly polarized patch array for Car-to-Car communications is presented. The antenna operates in the 5.850–5.950 GHz frequency band and has been designed to be integrated in a car windscreen. Thanks to the presence of the glass superstrate, a valuable miniaturization effect has been obtained. On the other hand, surface waves excited into...
An array of Travelling Wave Antennas (TWAs) is presented for near-field RFID applications in the UHF band (865–928 MHz). Since TWAs are not resonating structures, the proposed antenna results to be scalable, allowing for an easy integration in commercial readers. The antenna is realized exploiting the coplanar waveguide technology and it is composed by four in-phase radiating elements, in order to...
This paper presents characteristic comparisons between array, reflectarray and elliptic reflector antennas which can be implemented to radiate fields focused in the near zone of antenna aperture. A potential application, as to be demonstrated later in this paper, is for RFID reader applications at 2.4 GHz. The comparisons include beamwidth, field strength and contoured patterns, which allows one to...
This paper proposes a four element linear array of dual polarized wideband stacked patches fed through a novel slot coupling technique (Caso et al., 2009), where the patch is coupled to the feeding line through a square ring slot. The array operates in the GSM 1800-1900 band (1710-1910 MHz), UMTS band (1920-2170 MHz), in the ISM band (2400-2484 MHz) and in the UMTS 3G expansion band (2500-2690 MHz)...
This paper presents the implementation of reflectarray antenna to produce nearfield focused patterns in a target area, which is very useful for the RFID reader applications. Numerical investigation has exhibited good characteristics. Since reflectarray has less complexity than phased array antennas in the beam-forming, it has created great potentials in realistic applications.
In this paper a novel slot-coupling feeding technique is used to feed a circularly polarized patch antenna. The antenna is fed through two microstrip lines which are excited 90?? out-of-phase and coupled to a square patch by means of a square ring slot realized in the feeding network ground plane. Design procedure and simulation results are shown for a 2??2 array working in the WiMax 3.3-3.8 GHz frequency...
In this letter, a novel slot-coupling feeding technique is used to realize a dual-polarized 2 × 1 microstrip stacked patch array for mobile wireless communication systems. The array is intended as a basic module for base-station linear arrays, whose final size depending on beamwidth and gain requirements. Each array element is fed through two microstrip lines arranged on the basis of a sequential...
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