John E. Grandfield

Person

Bristol, RI, US

People

Patents Grantslast 30 patents

Information Patent Grant
Switchable active balanced-to-unbalanced phase shifter
- Patent number 10,819,321
- Issue date Oct 27, 2020
- University of South Florida
- David Manuel Zaiden
- H03 - BASIC ELECTRONIC CIRCUITRY
Information Patent Grant
Frequency selective surface antenna element
- Patent number 10,490,897
- Issue date Nov 26, 2019
- The Charles Stark Draper Laboratory, Inc.
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Electronically steerable single helix/spiral antenna
- Patent number 9,899,746
- Issue date Feb 20, 2018
- The Charles Stark Draper Laboratory, Inc.
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Low-profile loop antenna
- Patent number 9,748,642
- Issue date Aug 29, 2017
- The Charles Stark Draper Laboratory, Inc.
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ground plane meandering in Z direction for spiral antenna
- Patent number 9,337,533
- Issue date May 10, 2016
- The Charles Stark Draper Laboratory, Inc.
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Periodic spiral antennas
- Patent number 8,922,452
- Issue date Dec 30, 2014
- University of South Florida
- Jonathan Michael O'Brien
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Dual band electrically small tunable antenna
- Patent number 8,629,811
- Issue date Jan 14, 2014
- The Charles Stark Draper Laboratory, Inc.
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Low-Profile Loop Antenna
- Publication number 20160181697
- Publication date Jun 23, 2016
- The Charles Stark Draper Laboratory, Inc.
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Ground Plane Meandering in Z Direction for Spiral Antenna
- Publication number 20160043464
- Publication date Feb 11, 2016
- The Charles Stark Draper Laboratory, Inc.
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
ELECTRONICALLY STEERABLE SINGLE HELIX/SPIRAL ANTENNA
- Publication number 20150171517
- Publication date Jun 18, 2015
- The Charles Stark Draper Laboratory, Inc.
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
DUAL BAND ELECTRICALLY SMALL TUNABLE ANTENNA
- Publication number 20130069838
- Publication date Mar 21, 2013
- The Charles Stark Draper Laboratory
- John E. Grandfield
- H01 - BASIC ELECTRIC ELEMENTS

John E. Grandfield

Person

Patents Grantslast 30 patents

Switchable active balanced-to-unbalanced phase shifter

Frequency selective surface antenna element

Electronically steerable single helix/spiral antenna

Low-profile loop antenna

Ground plane meandering in Z direction for spiral antenna

Periodic spiral antennas

Dual band electrically small tunable antenna

Patents Applicationslast 30 patents

Low-Profile Loop Antenna

Ground Plane Meandering in Z Direction for Spiral Antenna

ELECTRONICALLY STEERABLE SINGLE HELIX/SPIRAL ANTENNA

DUAL BAND ELECTRICALLY SMALL TUNABLE ANTENNA