Patent ID: 8116846

Claim:
A device for insertion into a subject, comprising: an elongate member having a distal portion and a proximal portion; an inflatable member coupled to the distal portion of the elongate member; an antenna comprising connection pads and one or more conductors, the connection pads coupled to the one or more conductors to form a transmission line in an impedance matching circuit, the antenna coupled to the inflatable member, where inflation of the inflatable member changes a dimension of the antenna and a capacitance in the impedance matching circuit; a tie layer disposed at an interface between the inflatable member and the antenna, where the tie layer exhibits flexible and elastic characteristics that minimize sheer stress at the interface between the inflatable member and the antenna, wherein the tie layer is layered between the inflatable member and the antenna and a first surface of the tie layer is coupled to the inflatable member and a second surface that opposes the first surface is coupled to the antenna.