Watch-sized four-port dual-band MIMO antennas

Chiu, Chi-Yuk; Murch, R.D.

doi:10.1109/apwc.2016.7738101

Cited by 3 publications

(1 citation statement)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A multiantenna design cannot be employed due to the limited volume of the host object [1][2][3]. Several studies on MIMO antennas have proposed the implementation of the antenna on the host object of a smart watch [4][5][6]; however, those studies were conducted for the 2.4 GHz band and did not specify the antenna efficiency. An antenna [7] was designed for the 2.4 and 5.2 GHz bands but managed to only provide the simulated efficiency of the 2.4 GHz band.…”

Section: Introductionmentioning

confidence: 99%

Watchstrap-Embedded Four-Element Multiple-Input–Multiple-Output Antenna Design for a Smartwatch in 5.2–5.8 GHz Wireless Applications

Sun

2018

International Journal of Antennas and Propagation

View full text Add to dashboard Cite

This paper presents a compact four-element multiple-input-multiple-output (MIMO) antenna design operating within the WiFi 802.11 ac bands (5.2-5.84 GHz) for a smartwatch. The antenna is fabricated using a polyamide substrate and embedded into the strap of a smartwatch model; the strap is created using three-dimensional etching of plastic materials. The four-element MIMO antenna is formed by four monopole antennas, has a simple structure, and is connected to the system ground plane of the smartwatch. Due to the stub and notched block between two antennas and the slit in the system ground, the four-element MIMO antenna exhibits favorable isolation. Moreover, the envelope correlation coefficient of the antennas is considerably lower than 0.005 in the operating band. The measured −6 dB impedance bandwidths of the four elements of the antenna (Ant1-Ant4) with the human wrist encompass the WiFi 802.11 ac range of 5.2-5.84 GHz; moreover, an isolation of more than 20 dB is achieved. The measured antenna efficiency with and without a phantom hand are 45%-55% and 93%-97%, respectively.

show abstract