A flexible UWB inverted‐F antenna for wearable application

Abstract

A novel flexible antenna is proposed for communication with implanted devices in this letter. Polyimide is adopted as flexible substrate for conformal property. Based on inverted‐F structure, bow‐tie shaped structure is introduced on the top layer to achieve wideband performance. Besides, top and bottom layers are connected with a metal wall, which not only helps with miniaturization, but also leads to single‐sided fabrication requirement. Furthermore, the communication link with implanted antenna is estimated. Finally, the proposed flexible antenna is measured both in the air and around wrist in conformal form, showing good agreement with simulation results.

Circular ring structured ultra-wideband antenna for wearable applications

“…To check the ability for wearable applications, a three layered cylindrical phantom structure analysis is taken as shown in the Figure . The three layers of the phantom structure has skin, fat, and muscle shown in the Figure A . By placing the antenna on the phantom model, the interaction of the EM waves with the tissue layers of the body should also be considered for doing the analysis.…”

“…The three layers of the phantom structure has skin, fat, and muscle shown in the Figure 11A. 16 By placing the antenna on the phantom model, the interaction of the EM waves with the tissue layers of the body should also be considered for doing the analysis. Especially the radiation effects of the antenna are studied using specific absorption rate (SAR) analysis.…”

Three‐dimensional star antenna for wearable defense application

“…1 Among them, the most common antennas are microstrip patch, 2,3 printed dipole and monopole, 4,5 printed loop, 6,7 slot antennas, 8,9 and planar inverted F-antenna. 10,11 Moreover, mounting of antenna on certain positions over the body, such as wrist, helmet, and so on, requires the antenna to have flexible characteristics 12,13 whereas for positions like shoulder, chest, and so on, low profile miniature rigid antenna may be used. 14,15 Undeniably, reported works show the effort of the researchers on developing novel structures such as wearable antenna that has higher degrees of freedom for choosing the dimensions to make it work at a certain operating frequency.…”

“…Many antenna structures have been proposed and reported by various researchers for achieving an efficient communication in the requisite radio frequency bands 1 . Among them, the most common antennas are microstrip patch, 2,3 printed dipole and monopole, 4,5 printed loop, 6,7 slot antennas, 8,9 and planar inverted F‐antenna 10,11 . Moreover, mounting of antenna on certain positions over the body, such as wrist, helmet, and so on, requires the antenna to have flexible characteristics 12,13 whereas for positions like shoulder, chest, and so on, low profile miniature rigid antenna may be used 14,15 …”

A stretchable smart and highly efficient radio frequency antenna on low cost substrate

“…Apart from high sensitivity level and fast computation in antennas, the request gets similarly expanded for conforming for complex shapes and deformation . A request for the mechanical execution is the current advancement of integrated circuits . The most stipulated form of deformation among various modes (e.g., bending, twisting, and stretching) is stretching as it easily includes tensile strain to the larger extent.…”