Design of Multi-Antenna System for UMTS Clamshell Mobile Phones with Ground Plane Effects Considerations

In this paper, the influence of the ground plane dimensions on the port-to-port isolation of two closely-spaced Universal Mobile Telecommunications System (UMTS) Planar Inverted-F Antennas (PIFAs) with and without neutralization line is first presented. Parametric studies show the existence of an optimal size of the ground plane allowing optimizing the isolation and the efficiency of the considered antenna-system. The results obtained with this study are used in the second part to develop an efficient neutralized multi-antenna system for clamshell-type mobile phones. The obtained results, in terms of isolation, matching and diversity for the two possible configurations of the clamshell system in use namely the open and the closed states, show that good performance are obtained in the open state and preserved in the closed state. Prototypes of these two configurations are realized and measurement results are in good agreement with the simulations

Efficient Miniaturization Technique for Wire Patch Antenna

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Simple bandwidth-enhancement technique for miniaturised low-profile UWB antenna design

International audienceProposed is a simple technique to enhance the bandwidth of a planar monopole antenna with overall dimensions of 30 × 10 mm2. With the proposed method, based on a modified ground plane and a loop feeding structure, the -6 dB bandwidth can be enhanced by ~50% compared to the basic structure. Based on the simulation results, the antenna achieved a total efficiency higher than 70% on the entire band and the maximum realised gain varied between 2 and 4.8 dB. A prototype has been realised, and good agreement has been obtained between the measured and simulated results

Evaluation of Diversity and MIMO Performance of a New High Port to Port Isolation Dual-Band System

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Multi-Standard Miniature Antenna for Smart Wireless Handheld Devices Application

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Multi-Antenna Systems for Clamshell Mobile Phones

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Design of multi-antenna diversity system dedicated to sensor interrogation in multi-path environments

International audienceIn this paper, a new diversity system containing ten planar inverted F antennas (PIFA) placed on a parallelepiped box which combines polarization, radiation pattern and space diversities is presented. The system operates in the [2.4-2.5 GHz] band and exhibits a minimum of 17dB of isolation between all its input ports