Abstract:
Body-mountable devices and methods for embedding a structure in a body-mountable device are described. A body-mountable device includes a transparent polymer and a structure embedded in the transparent polymer. The transparent polymer defines a posterior side and an anterior side of the body-mountable device. The structure has an outer diameter and an inner diameter and includes a sensor configured to detect an analyte and an antenna. The antenna includes a plurality of conductive loops spaced apart from each other between the outer diameter and the inner diameter.
Abstract:
A system includes an antenna, an impedance measurement circuit, an impedance tuning circuit, and a controller. The impedance measurement circuit can include a test current source that conveys a test current through the antenna, and a voltage sensor that measure a voltage across the antenna while the test current is conveyed through the antenna. The impedance tuning circuit can be coupled to the antenna leads and can include one or more reactive elements that can be selectively coupled to the antenna, or otherwise adjusted, to effect adjustment of the impedance connected to the antenna. The controller can: (i) use the impedance measurement circuit to obtain a measurement indicative of an impedance of the antenna; (ii) determine an adjustment to the impedance tuning circuit based on the obtained measurement; and (iii) cause the impedance tuning circuit to make the determined adjustment.
Abstract:
Body-mountable devices and methods for embedding a structure in a body-mountable device are described. A body-mountable device includes a transparent polymer and a structure embedded in the transparent polymer. The transparent polymer defines a posterior side and an anterior side of the body-mountable device. The structure has an outer diameter and an inner diameter and includes a sensor configured to detect an analyte and an antenna. The antenna includes a plurality of conductive loops spaced apart from each other between the outer diameter and the inner diameter.