Communication system and communication apparatus

摘要

A communication system includes: an interrogator transmitting an interrogation signal while switching a carrier-wave frequency and receiving a response signal; and a plurality of responders each having a unique resonant frequency and returning the response signal in response to the interrogation signal with the own resonant frequency.

主权项

1. A communication system comprising:
an interrogator that:
switches a carrier wave frequency of a non-modulated interrogation signal among a plurality of carrier wave frequencies for transmission of the non-modulated interrogation signal; andtransmits the non-modulated interrogation signal in each of the plurality of carrier wave frequencies and receives a response signal in response to the transmitted non-modulated interrogation signal; and a plurality of responders each having a unique resonant frequency corresponding to one of the plurality of carrier wave frequencies, wherein each of the plurality of responders that is tuned to a corresponding switched carrier-wave frequency communicates the response signal to the interrogator in response to the transmitted non-modulated interrogation signal, wherein the interrogator performs switching of the carrier wave frequency based on a decision that information of the response signal is completely acquired from one of the plurality of responders, and wherein the plurality of responders comprise a clock generation circuit generating, from the non-modulated interrogation signal, a clock for a digital operation of the plurality of responders or another circuit, wherein the clock is generated by setting the average value of the non-modulated interrogation signal as a threshold and digitizing the non-modulated interrogation signal.