21
Stephen J Foti: Dual phase shifter. ERA Patents, Larson and Taylor, June 14, 1988: US04751453 (7 worldwide citation)

A variable dual phase shifter for simultaneously varying the phase shifts in two signal paths by equal and opposite amounts comprises two 90.degree. hybrids in the respective signal paths, and a pair of substantially identical transmission lines connecting output ports of one hybrid to output ports ...


22
Sameer Kanagala, Ajay Malik: Wireless data communication system having radio frequency devices, and related operating methods for disabling a transmit mode. Symbol Technologies, Ingrassia Fisher & Lorenz P C, February 1, 2011: US07880616 (7 worldwide citation)

A wireless system suitable for use as a radio frequency (RF) locationing or presence detection system includes at least one wireless access device and at least wireless device, such as an active RF tag, corresponding to an item or asset of interest. A method of managing RF transmissions by the wirel ...


23
David Edwin Splitz, William Charles Shoesmith, Robert Henry Grady: Systems and methods for time-based hailing of radio frequency devices. Mueller International, Taylor English Duma, February 25, 2014: US08660134 (6 worldwide citation)

The present disclosure relates to systems and methods for communicating with a radio frequency (RF) device. An exemplary method includes: sending to the RF device a hailing signal based on a system time; and sending to the RF device a data message.


24
Christopher P Ricci: Communication system for redirecting communication with radio frequency devices. December 25, 2007: US07313358 (6 worldwide citation)

A communication system that intercepts incoming radio signals and transmits a second signal notifying the user that a radio signal has been intercepted. The communication does so by using an interference generator that is passive, such as a shield, or active, such as destructive interference generat ...


25
Daniel Charles Kerr, Thomas Gregory McKay, Michael Carroll, Joseph M Gering: Linearity improvements of semiconductor substrate based radio frequency devices. RF Micro Devices, Withrow & Terranova P L L C, December 13, 2011: US08076750 (6 worldwide citation)

The present invention relates to using a trap-rich layer, such as a polycrystalline Silicon layer, over a semiconductor substrate to substantially immobilize a surface conduction layer at the surface of the semiconductor substrate at radio frequency (RF) frequencies. The trap-rich layer may have a h ...


26
GUPTA Dev V, LAI Zhiguo: Composants radioélectriques analogiques à large bande, Broadband analog radio-frequency components. Newlans, GUPTA Dev V, LAI Zhiguo, MEAGHER Timothy J, December 8, 2011: WO/2011/152896 (6 worldwide citation)

Broadband analog radio-frequency devices can be used to create building blocks for scalable analog signal processors that operate over bandwidths of 50 MHz to 20 GHz or more. Example devices include integrators (transconductors), digitally controlled attenuators, buffers, and scalable summers implem ...


27
Ting Wah Wong, Chong L Woo: Integrated radio frequency circuits. Altera Corporation, Martine Penilla & Gencarella, April 4, 2006: US07022566 (5 worldwide citation)

An RF circuit may be formed over a triple well that creates two reverse biased junctions. By adjusting the bias across the junctions, the capacitance across the junctions can be reduced, reducing the capacitive coupling from the RF circuits to the substrate, improving the self-resonance frequency of ...


28
Mary Ann Wehr: Method of making RFID devices. The Kennedy Group, May 19, 2009: US07533455 (5 worldwide citation)

The present invention is directed towards manufacturing a plurality of individual radio frequency devices from a web. The method comprises: transporting the web over a processing area; applying adhesive to the web as it is transported over the processing area; repeatedly applying sets of an antenna ...


29
Dev V Gupta, Zhiguo Lai: Broadband analog radio-frequency integrator. Newlans, Hamilton Brook Smith & Reynolds P C, October 21, 2014: US08866531 (4 worldwide citation)

Broadband analog radio-frequency devices can be used to create building blocks for scalable analog signal processors that operate over bandwidths of 50 MHz to 20 GHz or more. Example devices include integrators (transconductors), digitally controlled attenuators, buffers, and scalable summers implem ...


30
Thomas J Pennaz, Noel H Eberhardt: Circuit chip connector and method of connecting a circuit chip. Motorola, November 27, 2007: US07300863 (4 worldwide citation)

An interposer and a method of manufacturing a flexible radio frequency (RF) type device having an IC and thin film circuits, such as an antenna. The device is made by using an easy-to-insert interposer subassembly with pre-positioned ICs to mechanically and electrically attach an IC to the thin film ...



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