RECTIFIER CIRCUIT OF WIRELESS POWER TRANSMISSION SYSTEM

• US 20110298296A1
• Filed: 06/03/2011
• Published: 12/08/2011
• Est. Priority Date: 06/07/2010
• Status: Abandoned Application

• Current Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: Hwang, Sang Hoon
• Application Number:
  US13/153,334
• Publication Number:
  US 20110298296A1
• Time in Patent Office: Days
• US Class Current: 307/104
• CPC Class Codes: H02J 50/12 of the resonant type
• CPC Class Codes: H02J 50/20 using microwaves or radio frequency waves
• CPC Class Codes: H02M 7/066 particular circuits having a special characteristic

Abstract

Disclosed herein is a rectifier circuit of a wireless power transmission system, the rectifier circuit including: a rectifying unit rectifying an RF signal inputted through an RF input stage in a half-wave rectification type; an impedance matching unit installed between the RF input stage and the rectifying unit to match an impedance between the RF input stage and the rectifying unit; and a filtering unit filtering the signal rectified by the rectifying unit, thereby removing a radio frequency component and reducing a radio frequency ringing phenomenon, and thus, improving the efficiency of the rectifier circuit.

Claims

1. A rectifier circuit of a wireless power transmission system, the rectifier circuit comprising:

a rectifying unit rectifying an RF signal inputted through an RF input stage in a half-wave rectification type;

an impedance matching unit installed between the RF input stage and the rectifying unit to match an impedance between the RF input stage and the rectifying unit; and

a filtering unit filtering the signal rectified by the rectifying unit.

2. The rectifier circuit as set forth in claim 1, wherein the rectifying unit includes:

a first diode connected in series between the impedance matching unit and the filtering unit;

a capacitor connected in parallel with the first diode between the impedance matching unit and the filtering unit; and

a second diode connected in parallel with the first diode between a cathode terminal of the first diode and a ground.

3. The rectifier circuit as set forth in claim 1, wherein the impedance matching unit includes a capacitor connected in series between the RF input stage and the rectifying unit.

4. The rectifier circuit as set forth in claim 1, wherein the filtering unit includes:

an inductor connected in series between the rectifying unit and an output stage;

a first capacitor connected in parallel with the inductor between one end of the inductor and a ground; and

a second capacitor connected in parallel with the first capacitor between the other end of the inductor and the ground.