31
James E O Toole, John R Tuttle, Mark E Tuttle, Tyler Lowrey, Kevin M Devereaux, George E Pax, Brian P Higgins, David K Ovard, Shu Sun Yu, Robert R Rotzoll: Method and apparatus for wireless communication of identification information between radio frequency devices. Round Rock Research, Gazdzinski & Associates PC, August 31, 2010: US07786845 (4 worldwide citation)

Identification information is wirelessly communicated between radio frequency devices. In one embodiment, a first wireless device transmits a signal to request identification information. Other wireless devices are each affixed a respective item, and each of the other wireless devices determines if ...


32
Joakim Linde, Aysegul Findikli, Sven Jerlhagen, Ritesh Vishwakarma: Method and apparatus for co-location of two radio frequency devices. Broadcom Corporation, Sterne Kessler Goldstein & Fox P L L C, November 22, 2011: US08064839 (4 worldwide citation)

A method for avoiding signal interference between a first RF device and a second RF device is provided. The first and second RF devices are co-located and the first RF device is configured to operate within a semi-stationary range of a frequency band. The second RF device is configured to operate by ...


33
Joakim Linde, Aysegul Findikli, Sven Jerlhagen, Ritesh Vishwakarma: Method and apparatus for co-location of two radio frequency devices. Broadcom Corporation, Sterne Kessler Goldstein & Fox P L L C, May 18, 2010: US07720507 (4 worldwide citation)

A method for avoiding signal interference between a first RF device and a second RF device is provided. The first and second RF devices are co-located and the first RF device is configured to operate within a semi-stationary range of a frequency band. The second RF device is configured to operate by ...


34
Ki Y Nam, Thinh Dat Do: Method and apparatus for optimum biasing of cascaded MOSFET radio-frequency devices. Paradigm Wireless Systems, Blakely Sokoloff Taylor & Zafman, February 18, 2003: US06522197 (4 worldwide citation)

Generally, the invention relates to a method and apparatus to improve the performance of multi-stage radio frequency linear power amplifiers. More particularly, the present invention discloses a cascaded gain expansion stage and gain compression stage at differing bias levels to produce an amplifier ...


35
Willis Nicholas Hedley: Methods for determining proximity between radio frequency devices and controlling switches. Resonance Holdings, Willis Nicholas Hedley, PARKER Stephen Robert, October 11, 2007: WO/2007/114716 (4 worldwide citation)

The invention relates to a method of determining the proximity of radio frequency devices using the analysis of a series of receive signal strength indicator (RSSI) values. In particular the invention further relates to a method for the control of a switch based on the proximity of the radio frequen ...


36
David Edwin Splitz, William Charles Shoesmith, Robert Henry Grady: Systems and methods for dynamic squelching in radio frequency devices. Mueller International, Taylor English Duma, October 7, 2014: US08855569 (3 worldwide citation)

Systems and methods for communicating with a radio frequency (RF) device are disclosed herein. In particular, a method of the present disclosure includes: listening for a first hailing signal to be received on at least one hailing channel selected from a plurality of hailing channels, selecting at l ...


37
Nicholas Hedley Willis: Methods for determining proximity between radio frequency devices and controlling switches. Eckey Corporation, Iandiorio Teska & Coleman, July 29, 2014: US08792826 (3 worldwide citation)

The invention relates to a method of determining the proximity of radio frequency devices using the analysis of a series of receive signal strength indicator (RSSI) values. In particular the invention further relates to a method for the control of a switch based on the proximity of the radio frequen ...


38
Timothy C Kuo, Mansour Keramat, Edward Wai Yeung Liu: In-situ gain calibration of radio frequency devices using thermal noise. Nvidia Corporation, Cooley, February 21, 2012: US08121221 (3 worldwide citation)

An apparatus for calibrating gain of an radio frequency receiver (“Rx”) is disclosed to provide, among other things, a structure for performing in-situ gain calibration of an RF integrated circuit over time and/or over temperature without removing the RF integrated circuit from its operational confi ...


39
Hecht Kurt, Storch Leonard: Sequenced antenna array for determining where gaming chips with embedded rfid tags are located on a blackjack, poker or other gaming table & for myriad other rfid applications. Cias, Hecht Kurt, Storch Leonard, DeROSA Frank J, April 17, 2008: WO/2008/045075 (3 worldwide citation)

An improved antenna system, method and apparatus for interrogating and locating RFID (Radio Frequency Identification) tags and other RF (Radio Frequency) devices, and various applications therefore and thereof, are disclosed. One embodiment is for reading and locating the physical position of RFID t ...


40
Joakim Linde, Aysegul Findikli, Sven Jerlhagen, Ritesh Vishwakarma: Method and apparatus for co-location of two radio frequency devices. Broadcom Corporation, Sterne Kessler Goldstein & Fox P L L C, August 20, 2013: US08515354 (2 worldwide citation)

A method for avoiding signal interference between a first RF circuit and a second RF circuit is provided. The first and second RF circuits are co-located and the first RF circuit is configured to operate in a first frequency range. The second RF circuit is configured to operate in a second frequency ...



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