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 Title: |
US6424820:
Inductively coupled wireless system and method
[ Derwent Title ]
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| Country: |
US United States of America
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| Inventor: |
Burdick, Wayne A.; Belmont, CA
Boyden, James H.; Los Altos Hills, CA
Lynch, William C.; Palo Alto, CA
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| Assignee: |
Interval Research Corporation, Palo Alto, CA
other patents from INTERVAL RESEARCH CORPORATION (715526) (approx. 102)
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| Published / Filed: |
2002-07-23
/ 1999-04-02
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| Application Number: |
US1999000285511
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| IPC Code: |
Advanced:
H04B 5/02;
H04B 5/06;
H04H 20/48;
Core:
H04H 1/00;
IPC-7:
H04B 5/00;
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| ECLA Code: |
H04B7/08B2C; H04B5/00W2; H04B5/06; H04B7/08C; T04B7/10; T04H20/48; T04R1/10; T04R5/033; T04R420/07;
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| U.S. Class: |
Current:
455/041.1;
455/132;
455/151.2;
Original:
455/041;
455/568;
455/151.2;
455/132;
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| Field of Search: |
455/041,568,569,575,66,95,129,149,151.2,103,132
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| Priority Number: |
| 1999-04-02 |
US1999000285511 |
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| Abstract: |
A short range inductively coupled wireless communication system employs analog frequency modulation of a high frequency carrier and magnetic coupling between a transmitting antenna and a receiving antenna. A transmitter coupled to the transmitting antenna modulates multiple high-fidelity analog audio signals and digital control messages onto separate high frequency ("HF") carriers. The electric field portion of the transmitted electromagnetic field is substantially eliminated during transmission, while the magnetic field portion is substantially unaffected. The receiving antenna is coupled to a demodulator which reproduces the audio frequency signals and decodes control messages sent by the transmitter.
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| Attorney, Agent or Firm: |
Van Pelt & Yi LLP ;
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| Primary / Asst. Examiners: |
Trost, William; Nguyen, Simon
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| INPADOC Legal Status: |
Show legal status actions
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| Family: |
None
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First Claim:
Show all 6 claims |
We claim:
1. A wireless communication system, comprising:
- a master control unit including a first control unit transmitter operating at a first carrier frequency and a control unit antenna system coupled to the first transmitter; and
- a slave unit including a first slave unit receiver operating at the first carrier frequency and a first slave unit antenna system coupled to the first slave unit receiver, wherein the control unit antenna system and the first slave unit antenna system are coupled inductively; and
- a second slave unit receiver operating at a second carrier frequency, wherein a spacing between the first carrier frequency and the second carrier frequency is approximately 200 kHz.
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| Background / Summary: |
Show background / summary
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| Drawing Descriptions: |
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| Description: |
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| Forward References: |
Show 118 U.S. patent(s) that reference this one
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