Dual frequency band wireless LAN
First Claim
1. A method of performing wireless LAN (WLAN) communications with a dual band WLAN device, the method comprising:
- listening for primary communication signals in a primary frequency band;
initiating WLAN operations in the primary frequency band when the primary communication signals are detected;
listening for secondary communication signals in a secondary frequency band when the primary communication signals are not detected, each frequency band being defined by a standard; and
initiating WLAN operations in the secondary frequency band when the secondary communication signals are detected,wherein initiating WLAN operations in the secondary frequency band includes;
in a first operation,converting a first signal generated by a primary transceiver in the primary frequency band to the secondary frequency band in a secondary transceiver, the secondary transceiver using features of the primary transceiver to perform as a radio frequency device; and
transmitting the first signal in the secondary frequency band;
in a second operation,receiving a second signal in the secondary frequency band in the secondary transceiver;
converting the second signal to the primary frequency band in the secondary transceiver; and
processing the second signal in the primary frequency band in the primary transceiver,wherein the primary transceiver performs all fine gain and frequency adjustments for the primary and secondary transceivers.
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Accused Products
Abstract
A dual band radio is constructed using a primary and secondary transceiver. The primary transceiver is a complete radio that is operational in a stand alone configuration. The secondary transceiver is a not a complete radio and is configured to re-use components such as fine gain control and fine frequency stepping of the primary transceiver to produce operational frequencies of the secondary transceiver. The primary transceiver acts like an intermediate frequency device for the secondary transceiver. Switches are utilized to divert signals to/from the primary transceiver from/to the secondary transceiver. The switches are also configured to act as gain control devices. Antennas are selected using either wideband or narrowband antenna switches that are configured as a diode bridge having high impedance at operational frequencies on control lines that bias the diodes.
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Citations
11 Claims
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1. A method of performing wireless LAN (WLAN) communications with a dual band WLAN device, the method comprising:
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listening for primary communication signals in a primary frequency band; initiating WLAN operations in the primary frequency band when the primary communication signals are detected; listening for secondary communication signals in a secondary frequency band when the primary communication signals are not detected, each frequency band being defined by a standard; and initiating WLAN operations in the secondary frequency band when the secondary communication signals are detected, wherein initiating WLAN operations in the secondary frequency band includes; in a first operation, converting a first signal generated by a primary transceiver in the primary frequency band to the secondary frequency band in a secondary transceiver, the secondary transceiver using features of the primary transceiver to perform as a radio frequency device; and transmitting the first signal in the secondary frequency band; in a second operation, receiving a second signal in the secondary frequency band in the secondary transceiver; converting the second signal to the primary frequency band in the secondary transceiver; and processing the second signal in the primary frequency band in the primary transceiver, wherein the primary transceiver performs all fine gain and frequency adjustments for the primary and secondary transceivers. - View Dependent Claims (2, 3, 4, 5)
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6. A method of performing wireless LAN (WLAN) communications with a dual band WLAN device, the method comprising:
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listening for primary communication signals in a primary frequency band; initiating WLAN operations in the primary frequency band when the primary communication signals are detected; listening for secondary communication signals in a secondary frequency band when the primary communication signals are not detected, each frequency band being defined by a standard; and initiating WLAN operations in the secondary frequency band when the secondary communication signals are detected, wherein initiating WLAN operations in the secondary frequency band includes; in a first operation, converting a first signal generated by a primary transceiver in the primary frequency band to the secondary frequency band in a secondary transceiver, the secondary transceiver using features of the primary transceiver to perform as a radio frequency device; and transmitting the first signal in the secondary frequency band; in a second operation, receiving a second signal in the secondary frequency band in the secondary transceiver; directing flow of the second signal via switching that properly sizes the second signal so as not to saturate any components of the primary transceiver; converting the second signal to the primary frequency band in the secondary transceiver; and processing the second signal in the primary frequency band in the primary transceiver, wherein the primary transceiver performs all fine gain and frequency adjustments for the primary and secondary transceivers. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification