Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Signal transmission system and method










Image Number 6 for United States Patent #4983976.

A data transmission system includes a data carrier which has a memory for storing therein data including an identification code and which is attached to an object and a main apparatus having a microwave oscillator so as to conduct communications with the data carrier by use of a microwave, thereby writing data in or reading data from the memory of the data carrier.The main apparatus transmits a microwave modulated by a command or data and thereafter transmits a nonmodulated carrier for a predetermined period of time. On receiving a command, the data carrier executes a read/write operation on the memory and then generates a response. The data carrier receives the nonmodulated carrier sent from the main apparatus so as to conduct a modulation of quadrature phase-shift keying thereon by use of response data, thereby reflectively transmitting the modulated carrier with a plane of polarization shifted from a plane of polarization of the received wave by 90.degree..








 
 
  Recently Added Patents
Laser processing machine
Systems and methods for arranging and labeling cardiac episodes
Digital camera supporting intelligent self-timer mode and method of controlling the same
Systems, methods, and devices for selling transaction instruments via web-based tool
Content reproduction apparatus and content processing method therefor
Portable massage apparatus
Highly detectable pilot structure
  Randomly Featured Patents
Identification of antigenic peptides from multiple myeloma cells
Surveying systems and methods
Trim strip apparatus for concealing a joint
Method of cleaning dental and medical instruments using anti corrosion detergent compositions
Method of automatically detecting the locations of the frame lines of a reversal film and apparatus for carrying out the method
Refillable liquid reservoir
Computer storage cart
Communication eyewear assembly
Top gate self-aligned polysilicon TFT and a method for its production
Search augmentation