Speaker Device for Portable Terminal

Kim, Bong-Sub

doi:10.1121/1.4734257

Cited by 1 publication

(1 citation statement)

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“…11 Mechanical instruments and phased arrays are highly developed to move antennas for radar applications, 12,13 and advances in metamaterial antennas 14 and reconfigurable intelligent surfaces (RIS) 15 might facilitate electric movement. Mechanical antenna movement techniques for user equipment were developed for slider phones, 16,17 but were not automated; automated movement is done, for example, in portable printers. 18,19 Mapping of mobile communication channels, detection of device movements, and appropriate antenna movements are now becoming technically feasible in real-time.…”

Section: Introductionmentioning

confidence: 99%

Improving mobile communications with antennas that map the channel and move to local maxima

Artner

2023

Micro & Optical Tech Letters

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A technique is proposed that improves wireless communication channels in fading environments. The device creates a map of channel measurements. The device then moves its antenna to positions of the previously measured maximum within its reach. Proof‐of‐concept measurements were performed for smartphone‐sized devices in an office environment. A quarter‐wavelength monopole antenna for the 2.4 GHz frequency band successfully kept the channel at local maxima. The results show that small antenna movements over half of a wavelength are sufficient to keep the channel in local maxima, to avoid deep fading notches, and to improve channels over state‐of‐the‐art antennas that move with their devices. A channel model for the wireless communication channel of mobile devices with channel maximum antennas is proposed based on the measurement results.

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Section: Introductionmentioning

confidence: 99%

Improving mobile communications with antennas that map the channel and move to local maxima

Artner

2023

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

Speaker Device for Portable Terminal

Cited by 1 publication

References 0 publications

Improving mobile communications with antennas that map the channel and move to local maxima

Improving mobile communications with antennas that map the channel and move to local maxima

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