Abstract: The present technology relates to a signal processing apparatus, signal processing method, and program capable of extending a communication distance while reducing a signal delay in contactless communication. The signal processing apparatus performs filter processing on a signal received from a reader/writer via a first antenna, and transmits the signal to a card serving as a contactless communication apparatus via a second antenna. Furthermore, the signal processing apparatus performs filter processing on a signal received from the card via the second antenna, and transmits the signal to the reader/writer via the first antenna. The present technology can be applied to a communication system using contactless communication.

Abstract: There is provided an information processing apparatus including a display unit, and a plurality of sensor elements, wherein the plurality of sensor elements are provided separate from the display unit, wherein the display unit is configured to switch display between a plurality of output screens based on a user input on the plurality of sensor elements, the plurality of output screens including output screens having different hierarchical levels and output screens having a same hierarchical level, and wherein the output screens having different hierarchical levels display information on the different hierarchical levels, and the switching display is controlled to switch display directly between the output screens having different hierarchical levels based on the user input.

Abstract: [Object] To provide an antenna apparatus which can allow a user to freely select service which utilizes the electromagnetic field communication technology. [Solution] Provided is an antenna apparatus including: a first antenna configured to generate a magnetic field by flow of a current; and a module unit including a second antenna whose opening area is smaller than an opening area of the first antenna and which is able to be electromagnetically coupled with the first antenna, and a module configured to operate by a current generated by the second antenna through electromagnetic coupling between the first antenna and the second antenna. The module unit is able to be attached to and removed from the first antenna.

Abstract: [Object] To provide an antenna apparatus which can allow a user to freely select service which utilizes the electromagnetic field communication technology. [Solution] Provided is an antenna apparatus including: a first antenna configured to generate a magnetic field by flow of a current; and a module unit including a second antenna whose opening area is smaller than an opening area of the first antenna and which is able to be electromagnetically coupled with the first antenna, and a module configured to operate by a current generated by the second antenna through electromagnetic coupling between the first antenna and the second antenna. The module unit is able to be attached to and removed from the first antenna.

Abstract: There is provided an information processing apparatus including a display unit, and a plurality of sensor elements, wherein the plurality of sensor elements are provided separate from the display unit, wherein the display unit is configured to switch display between a plurality of output screens based on a user input on the plurality of sensor elements, the plurality of output screens including output screens having different hierarchical levels and output screens having a same hierarchical level, and wherein the output screens having different hierarchical levels display information on the different hierarchical levels, and the switching display is controlled to switch display directly between the output screens having different hierarchical levels based on the user input.