Table of Contents
Electronics, Volume 7, Issue 2 (February 2018)
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Cover Story (view full-size image) The passive repeater consists of two back-to-back arrays, each of which have 16 square microstrip [...] Read more. The passive repeater consists of two back-to-back arrays, each of which have 16 square microstrip antennas with tunable reactance devices (varactor diodes). This repeater captures and retransmits the signals bidirectionally because no directional component is used. Even though no amplifier is used, the channel gain between the transmitter and receiver can be enhanced by controlling the varactor diodes because the antenna directivity is semi-arbitrarily changed. Furthermore, this repeater can deal with the multiple streams, such as MIMO signals, since multiple antennas can simultaneously repeat the multiple signals. View this paper