Sign in Subscribe
Patents

Patent for Frequency Variable Power Transmitter and Receiver Issued

Strategic Insights

— 2 min read

A patent for a frequency variable power transmitter and receiver has been issued to inventor Takei, Ken, with patent number 8334619, assigned to Hitachi, Ltd. The patent, filed on October 29, 2008, and issued on December 18, 2012, focuses on improving power transmission efficiency by utilizing all fields of the electromagnetic field, including the static field, induction field, and radiation field. This technology has the potential to eliminate wired power lines and improve the convenience of installation and movement of information apparatuses.

Key Takeaways:

  • The patent, filed by Takei, Ken, focuses on developing a frequency variable power transmitter and receiver that can utilize all fields of the electromagnetic field for efficient power transmission.
  • The technology aims to overcome the limitations of conventional power transmission methods, which rely on a single field, such as the radiation field or induction field.
  • The power transmitter and receiver in the patent use a capacitive element and an inductive element in the antenna to utilize the static field and induction field simultaneously.
  • The transmitting frequency of the transmitter is set to be variable, allowing for modulated reflection waves to control power transmission efficiency.
  • The patent includes a frequency variable power receiver with an antenna, switching element, control circuit, memory, and rectifying circuit.
  • The frequency variable power transmitter and receiver in the patent achieve a more efficient power transmission than conventional techniques focused on a single field.
  • The technology has the potential to eliminate wired power lines and improve the convenience of installation and movement of information apparatuses.
  • The invention includes a power transmitting system that operates in Fresnel region, utilizing the static field, induction field, and radiation field generated in space.
  • The patent mentions the use of a directional coupler, demodulator, and control circuit in the frequency variable power transmitter.
  • The rectifying circuit in the frequency variable power receiver converts the demodulated signal to power.
  • The background information provided by the inventors highlights the limitations of conventional power transmission methods and the need for efficient power transmission.

Statistics:

  • Patent number: 8334619
  • File date: October 29, 2008
  • Issue date: December 18, 2012
  • Patent assigned to: Hitachi, Ltd.
  • Inventor: Takei, Ken
  • Frequencies used: variable
  • Power transmission fields: static field, induction field, radiation field
  • Power transmission efficiency: improved

Sources:

  • Takei, Ken. Frequency Variable Power Transmitter and Receiver in Fresnel Region and Power Transmitting System. U.S. Patent Number 8334619, filed October 29, 2008, and issued December 18, 2012. Patent URL: http://patft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&p=39&u=%2Fnetahtml%2FPTO%2Fsearch-bool.html&r=1917&f=G&l=50&co1=AND&d=PTXT&s1=20121218.PD.&OS=ISD/20121218&RS=ISD/20121218
  • Non-Patent Document 1: RFID Handbook Second Edition (written by Klaus Finkenzellar, translated by Software Engineering Institute, published by The Nikkan Kogyo Shimbun, Ltd., May 2004)

Read more