Peter Frederick Hurst, 68Palmetto, FL

2013010, May 2, 2013

Oct 27, 2011

13/282700

Alan J. Fenn - Wayland MA, US
Peter T. Hurst - Cambridge MA, US
Jeffrey S. Herd - Rowley MA, US
Kenneth E. Kolodziej - Lexington MA, US
Leonard I. Parad - Acton MA, US
Hans Steyskal - Concord MA, US

MASSACHUSETTS INSTITUTE OF TECHNOLOGY - Cambridge MA

H01Q 21/00
H01Q 7/00
H01Q 9/16

343793, 343893, 343866

Described is a simultaneous transmit and receive antenna system having a ring array of transmit antenna elements and a receive antenna element disposed on an axis that is perpendicular to and passing through the center of the ring array. Alternatively, the ring array includes receive elements and a transmit antenna element is disposed on the axis perpendicular to the ring array. Opposite antenna elements in the ring array differ in phase by 180 so that a radiation pattern null occurs at the antenna element at the center of the ring array. Also included are at least one ground plane and an electrically-conductive cylinder disposed on the perpendicular axis inside the ring array to provide a high degree of isolation between the transmit and receive antenna elements. The system may be configured for wireless communications, for example, according to WIFI IEEE standard 802.11 or WIMAX IEEE standard 802.16.

2019018, Jun 13, 2019

Feb 13, 2019

16/274675

- Cambridge MA, US
Frank C. Robey - Concord MA, US
Peter T. Hurst - Cambridge MA, US
Mark J. Silver - Bedford MA, US
Joseph M. D'Arco - Chelsea MA, US

H01Q 25/04
H01Q 21/29
H01Q 21/24
H04B 7/08
H04B 7/06
H01Q 7/02
H01Q 1/28
H01Q 5/48
H01Q 1/14
G01S 3/18
G01S 3/14

The present invention generally relates to an electromagnetic field vector sensing receive antenna array system for installation and deployment on a structure. A multipolarized array of collocated antenna elements is used to provide calibrated amplitude and phase radiation patterns with monopole, dipole, and loop modes generated from crossed loops connected to a beamformer. The invention has applications for installation and deployment on a tower, balloon, satellite for radio frequency sensing and location of low-frequency galactic emissions. The novel receive antenna array system comprises a multipolarized vector sensor antenna array. The disclosed direction-finding vector sensor can be installed and deployed on a structure and can detect and locate radio frequency emissions from galactic sources. The key system components of the receive antenna array system consist of deployable antennas, receivers, signal processing computer, and communications link.

2018012, May 3, 2018

Apr 13, 2016

15/302063

- Cambridge MA, US
Beijia ZHANG - Cambridge MA, US
Peter T. HURST - Cambridge MA, US
Kenneth E. KOLODZIEJ - Lexington MA, US
Larry L. RETHERFORD - Merrimack NH, US
Christian D. AUSTIN - Medford MA, US

H01Q 3/26
G01S 3/30
G01S 7/28
H01Q 11/10
H01Q 13/08
H01Q 21/20
H01Q 3/40

The present disclosure is directed towards direction finding (DF) systems that can detect and locals a radio frequency (RF) signal (e.g. an emergency beacon) is two dimensions (i.e., azimuth and elevation). In one embodiment, a DF system comprises an array of multipolarized loop antennas coupled to a beamformer which provides monopole, dipole, and loop antenna element modal signals. The DF system may also comprise a multi-channel digital receiver system coupled to the beamformer. The multi-channel digital receiver system is configured to receive modal signals provided thereto from the beamformer which can be used for accurate two-dimensional geolocation of RF signals including, but not limited to, location of RF emergency beacon sources.

2017022, Aug 10, 2017

Oct 19, 2016

15/297220

- Cambridge MA, US
Frank C. Robey - Concord MA, US
Peter T. Hurst - Cambridge MA, US
Mark J. Silver - Bedford MA, US
Joseph M. D'Arco - Chelsea MA, US

H01Q 25/04
H01Q 7/02
H01Q 21/24
H01Q 1/28
H04B 7/06
H04B 7/08

The present invention generally relates to an electromagnetic field vector sensing receive antenna array system for installation and deployment on a structure. A multipolarized array of collocated antenna elements is used to provide calibrated amplitude and phase radiation patterns with monopole, dipole, and loop modes generated from crossed loops connected to a be informer. The invention has applications for installation and deployment on a tower, balloon, or satellite for radio frequency sensing and location of low-frequency galactic emissions. The novel receive antenna array system comprises a multipolarized vector sensor antenna array. The disclosed direction-finding vector sensor can be installed and deployed on a structure and can detect and locate radio frequency emissions from galactic sources. The key system components of the receive antenna array system consist of deployable antennas, receivers, signal processing computer, and communications link.