DIVERSITY TRANSCEIVER FOR A WIRELESS LOCAL AREA NETWORK

• US 20070049348A1
• Filed: 05/31/2006
• Published: 03/01/2007
• Est. Priority Date: 03/19/2001
• Status: Active Grant

• Current Assignee: John O'Sullivan, Neil Weste
• Original Assignee: John O'Sullivan, Neil Weste
• Inventors: Weste, Neil, O'Sullivan, John
• Granted Patent: US 7,636,344 B2
• Time in Patent Office: Days
• US Class Current: 455/562.100
• CPC Class Codes: H04B 7/0814 based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
• CPC Class Codes: H04L 27/2626 Arrangements specific to the transmitter only
• CPC Class Codes: H04L 27/2647 Arrangements specific to the receiver only equalisation H04L27/01
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]
• CPC Class Codes: H04W 88/02 Terminal devices

Abstract

A wireless local area network system comprises a 5.0+ GHz radio transceiver with two receiving antennas and one transmitting antenna. A transmitter power amplifier output is connected to the transmitting antenna through a 6-8 pole filter to control spurious signal output. Each receiving antenna is fitted with its own low-noise amplifier followed by a simple bandpass filter. Each bandpass filter feeds a diversity switch with a single output to a single receiver. The radio system constitutes a physical-layer (PHY) part of a wireless local-area network.

Claims

1. A method of increasing the available radio signal in a wireless local area network, the method comprising the steps of:

separating radio transmission and reception signals into corresponding transmitter and receiving antennas;

providing at least two transmitter antennas or at least two receiver antennas for diversity; and

multiplexing between multiple said antennas with at least one of a receiver diversity switch and a transmitter diversity switch;

wherein a transmit/receive switch and its concomitant signal insertion loss is eliminated from a path between an antenna receiving wireless local area network transmission signals an a first stage of radio-frequency amplification.

2. A method of increasing the available radio signal in a wireless local area network, the method comprising the steps of:

separating radio transmission and reception signals into corresponding transmitter and receiving antennas;

providing at least two transmitter antennas or at least two receiver antennas for diversity; and

multiplexing between multiple said antennas with at least one of a receiver diversity switch and a transmitter diversity switch;

wherein, a multi-pole bandpass filter for said radio transmission signals and its concomitant signal insertion loss is eliminated from a path between an antenna receiving wireless local area network transmission signals an a first stage of radio-frequency amplification.

3. A method of increasing the available radio signal in a wireless local area network, the method comprising the steps of:

separating radio transmission and reception signals into corresponding transmitter and receiving antennas;

providing at least two transmitter antennas or at least two receiver antennas for diversity; and

multiplexing between multiple said antennas with at least one of a receiver diversity switch and a transmitter diversity switch;

wherein, a first stage of radio-frequency amplification is placed in a path after an antenna receiving wireless local area network transmission signals and before a simple bandpass filter for said radio reception signals and its concomitant signal insertion loss.

4. A method of increasing the available radio signal in a wireless local area network, the method comprising the steps of:

separating radio transmission and reception signals into corresponding transmitter and receiving antennas;

providing at least two transmitter antennas or at least two receiver antennas for diversity; and

multiplexing between multiple said antennas with at least one of a receiver diversity switch and a transmitter diversity switch;

wherein, a transmit/receive switch and its concomitant signal insertion loss is eliminated from a path between an antenna receiving wireless local area network transmission signals an a first stage of radio-frequency amplification;

wherein, a multi-pole bandpass filter for said radio transmission signals and its concomitant signal insertion loss is eliminated from a path between an antenna receiving wireless local area network transmission signals an a first stage of radio-frequency amplification; and

wherein, a first stage of radio-frequency amplification is placed in a path after an antenna receiving wireless local area network transmission signals and before a simple bandpass filter for said radio reception signals and its concomitant signal insertion loss.

5. A means for increasing the available radio signal in a wireless local area network, comprising:

means for separating radio transmission and reception signals into corresponding transmitter and receiving antennas;

means for providing at least two transmitter antennas or at least two receiver antennas for diversity; and

means for multiplexing between multiple said antennas with at least one of a receiver diversity switch and a transmitter diversity switch;

wherein a transmit/receive switch and its concomitant signal insertion loss is eliminated from a path between an antenna receiving wireless local area network transmission signals an a first stage of radio-frequency amplification.

6. A means for increasing the available radio signal in a wireless local area network, comprising:

means for separating radio transmission and reception signals into corresponding transmitter and receiving antennas;

means for providing at least two transmitter antennas or at least two receiver antennas for diversity; and

means for multiplexing between multiple said antennas with at least one of a receiver diversity switch and a transmitter diversity switch;

wherein, a multi-pole bandpass filter for said radio transmission signals and its concomitant signal insertion loss is eliminated from a path between an antenna receiving wireless local area network transmission signals an a first stage of radio-frequency amplification.

7. A means for increasing the available radio signal in a wireless local area network, comprising:

means for separating radio transmission and reception signals into corresponding transmitter and receiving antennas;

means for providing at least two transmitter antennas or at least two receiver antennas for diversity; and

means for multiplexing between multiple said antennas with at least one of a receiver diversity switch and a transmitter diversity switch;

wherein, a first stage of radio-frequency amplification is placed in a path after an antenna receiving wireless local area network transmission signals and before a simple bandpass filter for said radio reception signals and its concomitant signal insertion loss.

8. A means for increasing the available radio signal in a wireless local area network, the means comprising the steps of:

means for separating radio transmission and reception signals into corresponding transmitter and receiving antennas;

means for providing at least two transmitter antennas or at least two receiver antennas for diversity; and

means for multiplexing between multiple said antennas with at least one of a receiver diversity switch and a transmitter diversity switch;

wherein, a transmit/receive switch and its concomitant signal insertion loss is eliminated from a path between an antenna receiving wireless local area network transmission signals an a first stage of radio-frequency amplification;

wherein, a multi-pole bandpass filter for said radio transmission signals and its concomitant signal insertion loss is eliminated from a path between an antenna receiving wireless local area network transmission signals an a first stage of radio-frequency amplification; and

wherein, a first stage of radio-frequency amplification is placed in a path after an antenna receiving wireless local area network transmission signals and before a simple bandpass filter for said radio reception signals and its concomitant signal insertion loss.