Paul B Hansen

US Patent:

8196217, Jun 5, 2012

Filed:

Aug 16, 2010

Appl. No.:

12/806632

Inventors:

Yao-Te Cheng - Yonghe, TW
Yin Yuen - San Francisco CA, US
Paul C. Hansen - Palo Alto CA, US
Yuzuru Takashima - Cupertino CA, US
Lambertus Hesselink - Atherton CA, US

Assignee:

The Board of Trustees of the Leland Stanford Junior University - Palo Alto CA

International Classification:

G01Q 60/22

US Classification:

850 32, 977862

Abstract:

Transmission efficiency and/or spatial resolution provided by resonant apertures can be enhanced by disposing a tip on part of the screen that extends laterally into the aperture. For example, a tip disposed on the ridge of a C-shaped aperture can dramatically improve performance. A spatial resolution of λ/50 has been experimentally demonstrated with this approach. The combination of high spatial resolution and high transmission efficiency provided by this approach enables many applications, such as near field optical probes for near field scanning optical microscopy (NSOM). Another application is high resolution electron sources, where an photoelectron emitter can be disposed at or near a tip+aperture structure such that the high resolution optical near-field provides a correspondingly high resolution electron source.

US Patent:

20190045376, Feb 7, 2019

Filed:

Oct 1, 2018

Appl. No.:

16/148324

Inventors:

- Palo Alto CA, US
Mark E. Russell - Pine Grove CA, US
Paul Christopher Hansen - Palo Alto CA, US

International Classification:

H04W 16/24
H04L 29/06
H04W 4/02

Abstract:

In one embodiment, a terminal of a first wireless communication network determines a protection zone for each of a plurality of unintended receivers of a second wireless communication network, where a protection zone defines a geographical area where transmission by the terminal might interfere with operation of a corresponding unintended receive. At the time of an attempted transmission, the terminal determines its current location, and whether the current location is within any protection zone of the plurality of unintended receivers. If not within any protection zone of the plurality of unintended receivers, the terminal performs the transmission, but if so, then the terminal may then perform a local assessment of interference to the one or more unintended receivers. Once concluding that there would be no interference with any of the one or more unintended receivers, the terminal may then perform the transmission. Otherwise, the terminal prevents the transmission.

US Patent:

20170171762, Jun 15, 2017

Filed:

Dec 14, 2016

Appl. No.:

15/379131

Inventors:

- Palo Alto CA, US
Mark E. Russell - Pine Grove CA, US
Paul Christopher Hansen - Palo Alto CA, US

International Classification:

H04W 16/24
H04W 12/06
H04W 4/02
H04L 29/06
H04W 72/08
H04W 72/04

Abstract:

In one embodiment, a device of a first wireless communication network determines location information and antenna properties corresponding to each of a plurality of unintended receivers of a second wireless communication network. The device may then compute a protection zone for each of the plurality of unintended receivers based on the location information and antenna properties, wherein a protection zone defines a geographical area where transmission by a terminal in the first wireless communication network might interfere with operation of a corresponding unintended receiver. As such, the terminal may thus determine whether to perform or prevent an attempted transmission to an intended receiver in the first wireless communication network based on whether a current location of the terminal, at a time of the attempted transmission by the terminal, is within any protection zone of the plurality of unintended receivers.

US Patent:

20170171868, Jun 15, 2017

Filed:

Dec 14, 2016

Appl. No.:

15/379023

Inventors:

- Palo Alto CA, US
Mark E. Russell - Pine Grove CA, US
Paul Christopher Hansen - Palo Alto CA, US

International Classification:

H04W 72/08
H04L 29/06
H04W 12/06
H04W 64/00

Abstract:

In one embodiment, a terminal of a first wireless communication network determines a protection zone for each of a plurality of unintended receivers of a second wireless communication network, where a protection zone defines a geographical area where transmission by the terminal might interfere with operation of a corresponding unintended receive. At the time of an attempted transmission, the terminal determines its current location, and whether the current location is within any protection zone of the plurality of unintended receivers. If not within any protection zone of the plurality of unintended receivers, the terminal performs the transmission, but if so, then the terminal may then perform a local assessment of interference to the one or more unintended receivers. Once concluding that there would be no interference with any of the one or more unintended receivers, the terminal may then perform the transmission. Otherwise, the terminal prevents the transmission.