Patent ID: 9203477
Filing Date: 2015-12-01
Classification: H01Q,H04B

Abstract:
1. A contactless communication system comprising a first device and a second device, and performing contactless communication of digital baseband signals between the first device and the second device using near-field coupling, wherein the first device includes: the second device includes a second antenna operable to receive the digital baseband signal, and the first communication unit supplies the digital baseband signal to the first antenna by using a predetermined frequency band not including a resonant frequency of the first antenna, the predetermined frequency band being selected from among a plurality of frequency bands where a differential transmission characteristic of the first antenna exhibits a relatively small variation and being a frequency band where an attenuation amount of the differential transmission characteristic, relative to the differential transmission characteristic in wired connection, is suppressible through gain adjustment performed upon transmission and reception of the digital baseband signal.