COMMUNICATION DEVICE, COMMUNICATION SYSTEM, AND COMMUNICATION METHOD

• Main Authors: AKIYAMA KEIJI, NISHIYAMA FUMIHIRO
• Format: Patent
• Language: English; Japanese
• Published: 07.03.2019
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

To make it possible to suppress erroneous communication and stabilize communication.SOLUTION: The communication device includes: a first electrode and a second electrode; an antenna unit in which at least one of the first electrode and the second electrode has a plurality of divided electrodes; a communication circuit unit connected to the antenna unit and performing transmission operation and reception operation of transmission data with a communication target apparatus via the antenna unit according to a communication protocol including a plurality of communication stages; a switching unit configured to switch whether each of the plurality of divided electrodes is to be connected to the communication circuit unit so as to change an effective electrode area of at least one of the first electrode and the second electrode; and a control unit that causes the switching unit to change an effective electrode area of at least one of the first electrode and the second electrode on the basis of at least one of operation of the communication circuit unit, a type of transmission data, and a communication stage.SELECTED DRAWING: Figure 3 【課題】誤通信を抑制し、通信の安定化を図ることができるようにする。【解決手段】本開示の通信装置は、第１の電極および第２の電極を含み、第１の電極および第２の電極のうち、少なくとも一方が複数の分割電極を有するアンテナ部と、アンテナ部に接続され、複数の通信段階を含む通信プロトコルに従って被通信装置との間でアンテナ部を介して伝送データの送信動作および受信動作を行う通信回路部と、第１の電極および第２の電極のうち、少なくとも一方の有効電極面積を変更するように、複数の分割電極のそれぞれについて通信回路部に接続するか否かを切り替える切替部と、通信回路部の動作、伝送データの種別、および通信段階のうち少なくとも１つに基づいて、切替部によって、第１の電極および第２の電極のうち、少なくとも一方の有効電極面積を変更する制御部とを備える。【選択図】図３