Patent ID: 7626149

Claim:
A method of temperature and/or composition measurement of an at least partially aqueous target using a system including: a transmitter and receiver mechanism including one or more transmitting and receiving antenna(e); signal processing means, capable of calculating the attenuation of the transmitted signal; said method including: irradiating said target with a plurality of electromagnetic radiation signals including at least first and second electromagnetic radiation signals of differing frequencies wherein said first signal has a first frequency in the microwave/UHF spectrum, and said second signal has a second frequency in the radio frequency (RF) spectrum; receiving an attenuated signal transmitted though the target; calculating the attenuation of the transmitted signal with said signal processing means; and wherein a fat mass of the target with a known target mass, a solids fraction (S) and with a water fraction (W) and ice fraction (I) proportional to attenuations of said first frequency and second frequency respectively, is calculated by applying said fractions according to the relationship: Fat Mass=Target Mass×[1−[W+I+S]].