Abstract

PENAFIEL-OJEDA, Carlos Ramiro et al. Beamforming Networks for antenna array, useful in WiFi applications. Novasinergia [online]. 2018, vol.1, n.1, pp.59-66.  Epub June 01, 2021. ISSN 2631-2654.  https://doi.org/10.37135/unach.ns.001.01.07.

In this paper several types of beamforming networks have been presented, this proposal can be used for an array antenna, which are used in several types of WiFi applications, IEEE 802.11b/g/draft-n. The first design corresponds to a 4x4 Butler Matrix for a resonance frequency at 2.45 GHz, depending on the port through which the signal is excited, it will be possible to obtain several variations in phase at the output ports (45 ∘ , 135 ∘ , -45 ∘ and -135 ∘ ), the proposed Butler matrix has been optimized from a generalized matrix scheme, reducing the size through a simple overlap of multiple transmission lines to 𝜆/4 at the central frequency. The second design corresponds to a Rotman lens with a characteristic resonance frequency of 5.8 GHz, with a maximum focal angle of 30 ∘ , for this design has been used geometric optics concept, and the last design has been made for a frequency of 5.8 GHz using a slot array designed with Substrate Integrated Waveguide technology.

Keywords : Array Antena; Butler Matrix; Rotman Lens; Slots array with SIW guide; WiFi.

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