US Patent 8643473 Signal processing apparatus and signal processing method

There is provided a signal processing apparatus, including a first antenna to perform non-contact communication with a reader writer, a second antenna installed adjacent to the first antenna to perform the non-contact communication with a non-contact communication apparatus, a metal body that is arranged between the first antenna and the second antenna and blocks a magnetic field between the first antenna and the second antenna, an amplification unit that amplifies a carrier wave by using at least external power supplied from an external power supply, a modulation unit that modulates the carrier wave, and a load modulation unit that changes an impedance of the first antenna.