Low-Profile, Conjoined and Decoupled 2.4/5/6-GHz Laptop Antennas

A low-profile, conjoined and decoupled two-unit antenna design for Wi-Fi 6E laptops is introduced. The single monopole unit has a small size of 4 mm x 18.7 mm and comprises a branched monopole with two shorting inductors for producing the 5 GHz (5150-5825 MHz) and 6 GHz (5925-7125 MHz) bands, and an inductor loaded at one branch end and connecting to a tuning portion for 2.4 GHz (2400-2484 MHz) operation. Two symmetrical units are further conjoined by a chip inductor that connects the ends of the tuning portions, forming into a compact footprint of 4 mm x 38.4 mm for the two-unit laptop design. With the use of the decoupling inductor and proper two-unit monopole arrangement, acceptable isolation and low envelop correlation coefficient (ECC) can be attained.