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International Journal of Antennas and Propagation
2004 Publications
collected from a compatible aggregator


  • Effect of Earth Ground and Environment on Body-Centric Communications in the MHz Band

    Katsuyuki Fujii; Yasuyuki Okumura (2012)
    Body area network (BAN) research, which uses the human body as a transmission channel, has recently attracted considerable attention globally. Zimmerman first advocated the idea in 1995. Illustrations of the electric field streamlines around the human body and wearable devices with electrodes were drawn. In the pictures, the electrodes of the wearable devices constitute a closed circuit with the human body and the earth ground. However, analysis of the circuit has not been conducted. In this ...

    A Compact Size 4–19.1 GHz Heart Shape UWB Antenna with Triangular Patches

    Isik, Gokmen; Topaloglu, Serkan (2013)
    An ultrawideband antenna is designed, simulated, and realized. To overcome the narrow bandwidth characteristics of basic patch antennas, the structure of the radiation pattern is optimized by the aid of elliptical and rectangular patches. Also triangular patches are applied to the antenna edge in order to enhance the VSWR and gain properties. A typical VSWR of 1.5 (less than 2 in the whole frequency range) and a typical gain of 2 dBi (mainly above 1 dBi in the whole frequency range) are obser...

    User Effects on MIMO Performance: From an Antenna to a Link Perspective

    Ali, Shirook M.; Mobasher, Amin; Lusina, Paul (2011)
    We investigate in this paper the effects of the user's presence on the performance of a multiple-input multiple-output (MIMO) system in data and in voice usage scenarios. The investigation studies the user effects on the antenna performance and how these are incorporated into the MIMO channel and the link characteristics. The antennas and the user are deterministic. These are then integrated into the statistical 3GPP spatial channel model (SCM) for a typical macrocell propagation environment ...

    Estimating Direction of Arrival by Using Two-Dimensional State-Space Balance Method

    Wang, Jun; Xiang, Hong; Wei, Shaoming; Sun, Zhongsheng (2017)
    A study of a two-dimensional state-space balance (2D SSB) method for estimating direction of arrival (DOA) for uniform rectangular array (URA) is presented in this letter. The comprehensive utilization of controllability and observability matrices and automatic pairing technique are considered in this method by using the single snapshot. Therefore, the DOAs of elevation angle and azimuth angle can pair automatically and acquire better estimation performance compared with 2D matrix pencil meth...

    Phase Reversal Technique Applied to Fishnet Metalenses

    Pacheco-Peña, Victor; Minin, Igor V.; Minin, Oleg V.; Beruete, Miguel (2018)
    In this work, the fishnet metamaterial is applied to several converging metalenses by combining the zoning, reference phase, and phase reversal techniques. First, the zoning and reference phase techniques are implemented in several metalenses at 55 GHz (λ0=5.45 mm) with a short focal length of 1.5 λ0. Then, the phase reversal technique is applied to these metalenses by switching from a concave to a convex profile in order to change the phase distribution inside of them. The designs are evalua...
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