论文信息 - Novel ultra-wideband Butler matrix for wireless underground mines

Novel ultra-wideband Butler matrix for wireless underground mines

The main cause of degradation of communication quality in underground mines is multipath fading [1]. This multipath phenomenon arises when a transmitted signal undergoes reflection from various obstacles in the propagation environment which degrades the transmission quality and limits the frequency efficiency [1]. Smart antennas are one resolution to overcome this problem [2]. One of the most widely-known of switched beam networks, which is a part of smart antenna, is Butler matrix [2]. It is a passive feeding NXN network with beam steering capabilities for phased array antennas with N outputs connected to antenna elements and N inputs or beam ports.

A. Djaiz | M. Nedil | A. M. Habib | T. A. Denidni | M. traii

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