Patent US6138050A successfully refreshed from Google Patents.
US6138050A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antenna system and apparatus for radio-frequency wireless keyboard
Assignee: Logitech Europe SA
•
Filing: 1997-09-17
•
Granted: 2000-10-24
•
Expires: 2017-09-17
Abstract
Abstract An antenna system for a radio frequency ("RF") wireless keyboard includes a metallic plate as a part of the antenna system. The metallic plate is located within the wireless keyboard. A RF transmitter is coupled to the metallic plate and an antenna wire which form an the antenna loop. The antenna loop may also be directly integrated into the metallic plate by creating a cut-out space in the metallic plate. The antenna system may also include the metallic plate directly coupled with the RF transmitter so that the metallic plate is a whip or dipole antenna. The RF transmitter generates RF signals associated with particular keyswitches of the wireless keyboard. The antenna system transmits the generated RF signals to a RF receiver that resides separately from, and that communicates with, the wireless keyboard.
Inventors
- 👤 Gerhard Schneider
- 👤 Viron Teodoridis
- 👤 Sergio Lazzarotto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:17
CPC Classifications
H; H01; H01Q; H01Q1/00; H01Q1/12; H01Q1/22; H01Q1/2258; H01Q1/2266; G; G06; G06F; G06F3/00; G06F3/01; G06F3/02; G06F3/023; G06F3/0231; H01Q1/24; H01Q1/241; H01Q1/242; H01Q1/243; H01Q7/00; H01H; H01H2207/00; H01H2207/048
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
135 words
In a data processing system including a computer coupled with a radio frequency receiver and a wireless keyboard having a radio frequency transmitter, a radio frequency antenna system for communicatively coupling the radio frequency transmitter and the radio frequency receiver, the radio frequency antenna system comprising: a metallic plate, having a first side and a second side, coupled within the wireless keyboard; and an antenna wire, having a first end and a second end, the first end of the antenna wire and the first side of the metallic plate coupled to the radio frequency transmitter and the second end of the antenna wire coupled to the second side of the metallic plate, the antenna wire and the metallic plate forming a closed antenna loop for transmitting a radio frequency signal from the radio frequency transmitter.
Claim 2
Dependent Claim
135 words
In a data processing system including a computer coupled with a radio frequency receiver and a wireless keyboard having a radio frequency transmitter, a radio frequency antenna system for communicatively coupling the radio frequency transmitter and the radio frequency receiver, the radio frequency antenna system comprising: a metallic plate, having a first side and a second side, coupled within the wireless keyboard; and an antenna wire, having a first end and a second end, the first end of the antenna wire and the first side of the metallic plate coupled to the radio frequency transmitter and the second end of the antenna wire coupled to the second side of the metallic plate, the antenna wire and the metallic plate forming a closed antenna loop for transmitting a radio frequency signal from the radio frequency transmitter.
Claim 3
Dependent Claim
17 words
The radio frequency antenna system in claim 1, wherein the antenna wire includes at least one turn.
Claim 4
Dependent Claim
22 words
The radio frequency antenna system in claim 1, wherein the antenna loop generates a magnetic field for transmitting the radio frequency signal.
Claim 5
Dependent Claim
23 words
The radio frequency antenna system in claim 1, wherein the radio frequency signal is transmitted by the antenna system at substantially 27 MHz.
Claim 6
Dependent Claim
18 words
The radio frequency antenna system in claim 1, wherein the metallic plate comprises a plurality of metallic plates.
Claim 7
Dependent Claim
111 words
In a wireless keyboard, an antenna system comprising: a metallic plate, having a first side and a second side; a transmitter having a first connection and a second connection, the second connection of the transmitter coupled to the second side of the metallic plate, the transmitter for generating a communication signal; and an antenna wire, having a first end and a second end, the first end coupled to the first side of the metallic plate and the second end coupled to the first connection of the transmitter for transmitting the communication signal, wherein the metallic plate and the antenna wire comprise a closed antenna loop to transmit the generated communication signal.
Claim 8
Dependent Claim
111 words
In a wireless keyboard, an antenna system comprising: a metallic plate, having a first side and a second side; a transmitter having a first connection and a second connection, the second connection of the transmitter coupled to the second side of the metallic plate, the transmitter for generating a communication signal; and an antenna wire, having a first end and a second end, the first end coupled to the first side of the metallic plate and the second end coupled to the first connection of the transmitter for transmitting the communication signal, wherein the metallic plate and the antenna wire comprise a closed antenna loop to transmit the generated communication signal.
Claim 9
Dependent Claim
15 words
The antenna system in claim 6, wherein the antenna wire includes at least one turn.
Claim 10
Dependent Claim
17 words
The antenna system in claim 6, wherein the antenna loop comprises a length of substantially 40 centimeters.
Claim 11
Dependent Claim
24 words
The antenna system in claim 8, wherein the transmitter is a radio frequency transmitter that transmits a radio frequency signal at substantially 27 MHz.
Claim 12
Dependent Claim
16 words
The antenna system in claim 6, wherein the metallic plate comprises a plurality of metallic plates.
Claim 13
Dependent Claim
109 words
In a wireless radio frequency keyboard, a radio frequency antenna system comprising: a radio frequency transmitter having a first electrical connection and a second electrical connection, for generating a radio frequency signal; and a metallic plate including a first portion and a second portion, the first portion and the second portion having a cut out space in-between for forming a closed antenna loop, the first portion of the metallic plate coupled to the first electrical connection of the radio frequency transmitter and the second portion of the metallic plate coupled to the second electrical connection of the radio frequency transmitter, the antenna loop for transmitting the radio frequency signal.
Claim 14
Dependent Claim
109 words
In a wireless radio frequency keyboard, a radio frequency antenna system comprising: a radio frequency transmitter having a first electrical connection and a second electrical connection, for generating a radio frequency signal; and a metallic plate including a first portion and a second portion, the first portion and the second portion having a cut out space in-between for forming a closed antenna loop, the first portion of the metallic plate coupled to the first electrical connection of the radio frequency transmitter and the second portion of the metallic plate coupled to the second electrical connection of the radio frequency transmitter, the antenna loop for transmitting the radio frequency signal.
Claim 15
Dependent Claim
74 words
The radio frequency antenna system in claim 11, wherein the metallic plate includes a third portion between the first portion and the second portion, the space between the first portion and the third portion forming a first cut-out space and the space between the third portion and the second portion forming a second cut-out space, the first portion, the second portion, and the third portion, forming at least one turn for the antenna loop.
Claim 16
Dependent Claim
22 words
The radio frequency antenna system in claim 11, wherein the antenna loop generates a magnetic field for transmitting the radio frequency signal.
Claim 17
Dependent Claim
25 words
The radio frequency antenna system in claim 11, wherein the metallic plate is substantially dimensioned to an area of the wireless radio frequency keyboard base.
Claim 18
Dependent Claim
22 words
The radio frequency antenna system in claim 14, wherein the radio frequency transmitter transmits a radio frequency signal at substantially 27 MHz.
Claim 19
Dependent Claim
97 words
In a wireless keyboard having a plurality of keyswitches and an antenna system comprising: a transmitter, having a first electrical connection and a second electrical connection for generating a communication signal corresponding to a particular keyswitch on the wireless keyboard; and a metallic plate, having a first side and a second side, the first side coupled to the first electrical connection and the second side coupled to the second electrical connection of the transmitter for transmitting the communication signal, wherein the metallic plate comprises a closed antenna loop dimensioned from a cut-out space in the metallic plate.
Claim 20
Dependent Claim
97 words
In a wireless keyboard having a plurality of keyswitches and an antenna system comprising: a transmitter, having a first electrical connection and a second electrical connection for generating a communication signal corresponding to a particular keyswitch on the wireless keyboard; and a metallic plate, having a first side and a second side, the first side coupled to the first electrical connection and the second side coupled to the second electrical connection of the transmitter for transmitting the communication signal, wherein the metallic plate comprises a closed antenna loop dimensioned from a cut-out space in the metallic plate.
Claim 21
Dependent Claim
19 words
The antenna system in claim 16, wherein the metallic plate generates a magnetic field for transmitting the communication signal.
Claim 22
Dependent Claim
23 words
The antenna system in claim 16, wherein the transmitter is a radio frequency transmitter that transmits the communication signal at substantially 27 MHz.
Claim 23
Dependent Claim
23 words
The antenna system in claim 16, wherein the antenna loop is substantially dimensioned to a perimeter of a base of the wireless keyboard.
Claim 24
Dependent Claim
16 words
The antenna system in claim 16, wherein the metallic plate comprises a plurality of metallic plates.
References Cited (Backward Citations)
WO1985000480A1
Cited
US4860292A
Cited
US5138328A
Cited
WO1994008361A1
Cited
EP0604338A1
Cited
US5365230A
Cited
WO1994028594A1
Cited
US5677698A
Cited
US5623271A
Cited
EP0714151A1
Cited
US5708458A
Cited
US5793359A
Cited
US5684672A
Cited
US5787259A
Cited
US5828341A
Cited
US5850340A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2003-10-24 | 2004-04-24 | 2004-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2007-10-24 | 2008-04-24 | 2008-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2011-10-24 | 2012-04-24 | 2012-10-24 | $7700.00 | Window Closed / Lapsed |