Abstract
In this paper, two antennas for wearable applications are presented, including the development of new antennas on fabric substrates for communication with in-body and outside the body sensors. The design process for fabrication via screen printing on fabric substrates is outlined using commercially available conductive inks. The effects of non-conductive, paint-based inks as interface layers between conductive elements and fabric substrates of coplanar keyhole fabric antennas is presented along with wash sustainability and its effects on antenna resonance at 5.8 GHz over time. Fabrication of screen-printed radio frequency identification tag antenna includes placement of the tag chip. Accessibility of the tag is assessed by comparing reader data to distance between the reader and the tag at 915 MHz.
Highlights
T HE WEARABLE device industry is growing increasing demand for sensors to be integrated into daily wearables such as clothing and accessories
This paper addresses one way to accomplish this by screen printing conductive inks directly onto the wearable fabric substrate [1]
The second antenna presented in this paper is an ultra-high frequency (UHF) radio frequency identification (RFID) tag antenna operating at 915 MHz, which can be used for motion tracking applications [2]
Summary
T HE WEARABLE device industry is growing increasing demand for sensors to be integrated into daily wearables such as clothing and accessories. There have are some existing clothing items, like the Myontec MBody smart clothing, where sensors are detachable from athletic apparel including a shirt and shorts Devices like these tend to be bulky, as the sensors are large and protrude from the clothing item when worn. The second antenna presented in this paper is an ultra-high frequency (UHF) radio frequency identification (RFID) tag antenna operating at 915 MHz, which can be used for motion tracking applications [2]. Both antennas are simulated in ANSYS HFSS, tested with skin-mimicking gel to represent the antennas as part of clothing worn against the body. The analysis of each antenna includes pertinent data to its function including transmission between each antenna and the reader with increasing distance between them
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