It is possible to reduce the size of a surface acoustic wave resonator by enhancing the Q value. In an embodiment, an antenna includes metallic traces in a hybrid circuit that is configured for use in a hearing aid. Next, a security program is conditionally updated with the security update file based on the parameter. The traction drive can operate with different supply voltages. The at least two layers of multilayer laminated material have areas of non-total coupling at the front, rear and side walls.