Patent ID: 7820372

Claim:
A method for identifying and measuring the concentration of bio or chemical molecules in a solution, comprising the following steps: (1) placing a dual-band antenna in a blank solution, generating a sensing microwave frequency band at dual working frequencies between 1 GHz and 40 GHz, and measuring the parameters for the antenna, comprising frequency, amount of S(1,1) parameter, impedance, and phase variation; (2) placing the antenna in a measured solution comprising bio or chemical molecules to be identified or measured, generating a second sensing microwave frequency band at the same frequencies as the previous step for parameter measurement, allowing the frequency, impedance, S(1,1) parameter, and phase variation to drift due to the presence of the bio or chemical molecules in the solution, and measuring the change in frequency, S(1,1) parameter, impedance, and phase variation; and (3) determining the molecular type and concentration of the bio or chemical molecules in the measured solution using a table or chart correlating changes in parameters with molecular characteristics and concentration.