An antenna having a plurality of resonant frequencies and comprising a feed point, a ground point and a conductive track that extends from the feed point and returns to the ground point and means for locally increasing the reactance of the antenna track at a first position coincident with a maximum electromagnetic field associated with at least one of the plurality of resonant frequencies. The bioadhesive properties of a polymer are enhanced by incorporating an anhydride oligomer into the polymer to enhance the ability of the polymer to adhere to a tissue surface such as a mucosal membrane. Operational characteristics of the system under development are \u201cprofiled\u201d through answers to questions reflecting the high level system design. Wafer fixing means for fixing the wafer in a state in which the wafer is mounted on the platform is provided in the platform, and a measurement device having a probe opposed to the straight track and capable of being displaced in the second direction is installed on the base with a second clearance M being provided with the block in the first direction. In this manner, the result message may be routed to the client. A gate structure may be respectively formed in a first area and a second area of a substrate.