Invention Grant
- Patent Title: Systems and methods for an RF nulling scheme in RFID
- Patent Title (中): RFID射频归零方案的系统和方法
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Application No.: US11531988Application Date: 2006-09-14
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Publication No.: US07787837B2Publication Date: 2010-08-31
- Inventor: Eric Mikuteit
- Applicant: Eric Mikuteit
- Applicant Address: US CA Poway
- Assignee: Neology, Inc.
- Current Assignee: Neology, Inc.
- Current Assignee Address: US CA Poway
- Agency: Procopio Cory Hargreaves & Savitch LLP
- Agent Noel C. Gillespie
- Main IPC: H04B1/04
- IPC: H04B1/04 ; H04B1/10

Abstract:
Systems and methods for an RF nulling scheme are provided. An RF nulling scheme can minimize the level of unwanted RF signal reflections entering the receiver without attenuating the desired signal response from an RFID tag. In one aspect of the RF nulling scheme a synthesizer signal can be split between a main path and a nulling path. In the nulling path the signal from the splitter can be routed through an electronically variable phase shifter and variable gain amplifier to create a nulling signal. The nulling signal can cancel the unwanted reflected signal. The phase or amplitude of the nulling signal can then be adjusted to improve cancellation as necessary.
Public/Granted literature
- US20070060075A1 SYSTEMS AND METHODS FOR AN RF NULLING SCHEME IN RFID Public/Granted day:2007-03-15
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