• Corpus ID: 114979285

# A Two-element Parasitic Antenna Approaching the Minimum Q-factor at a Given Directivity

@article{Ferrero2017ATP,
title={A Two-element Parasitic Antenna Approaching the Minimum Q-factor at a Given Directivity},
author={Fabien Ferrero and Leonardo Lizzi and Lars Jonsson and Lei Wang},
journal={arXiv: Applied Physics},
year={2017}
}
• Published 5 May 2017
• arXiv: Applied Physics
In this paper we investigate a super-directive antenna based on a parasitic structure with a circumscribing sphere of diameter 69 mm corresponding to 0.2$\lambda$@880 MHz. The antenna is modeled, simulated, measured, and it is also evaluated against the new Q-factor bound for small antennas at a given total directivity. A maximum directivity of 7.2 dBi is measured with a radiation efficiency of -6.5 dB at 876 MHz. An intermediate directivity of 6.2 dBi is observed at 880 MHz with 20 dB front-to…
4 Citations
IEEE Transactions on Antennas and Propagation
• 2021
This article considers a small embedded planar antenna in a square-shaped terminal of 25 cm2 at a frequency band near 900 MHz, intended for long-range communication. This article aims to shows how
• Computer Science
• 2018
This work describes a power front-to-back ratio, and a related, beam-shaping constraint that can be used in optimization for the minimum Q-factor, and shows that such a non-convex Q-Factor optimization can be solved with the semi-definite relaxation technique.
Sub-wavelength antennas have become ubiquitous in essential devices, such as mobile phones, sensors, Internet of things (IoT) and machine to machine (M2M) communication devices. Such antennas are o
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IEEE Transactions on Antennas and Propagation
• 2017
It is shown that the relaxed solution is also a solution of the original problem of determining the lower <inline-formula> <tex-math notation="LaTeX">$Q$ </tex-Math></inline- formula>-factor bound for a total desired directivity.

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