In this invention, a “antenna” is integrated into the barrel plug of an AC adapter and called
AC‐adapter type antenna. The device such a laptop can benefit better antenna performance
(transmission range and throughput) when users plug this antenna‐integrated AC adapter to
charging the laptop.
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INC, HP, "AC-ADAPTER TYPE ANTENNA TO ENHANCE WIRELESS PERFORMANCE", Technical Disclosure Commons, (August 05, 2020)