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Inventor

GRANDFIELD JOHN E

US8 patents
⚠️ This page may combine multiple inventors who share the name “GRANDFIELD JOHN E”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

CHARLES STARK DRAPER LABORATORY INC

3 patents
US9899746B2Feb 20, 2018

Electronically steerable single helix/spiral antenna

CHARLES STARK DRAPER LABORATORY INC9 citations77
US10490897B1Nov 26, 2019

Frequency selective surface antenna element

CHARLES STARK DRAPER LABORATORY INC2 citations67
US9748642B2Aug 29, 2017

Low-profile loop antenna

CHARLES STARK DRAPER LABORATORY INC0 citations50

GRANDFIELD JOHN E

1 patent
US8629811B2Jan 14, 2014

Dual band electrically small tunable antenna

GRANDFIELD JOHN E218 citations91

GTE GOVERNMENT SYST

1 patent
US5802452ASep 1, 1998

Multiple channel radio frequency repeater

GTE GOVERNMENT SYST42 citations88

O'BRIEN JONATHAN MICHAEL

1 patent
US8922452B1Dec 30, 2014

Periodic spiral antennas

O'BRIEN JONATHAN MICHAEL9 citations76

ZAIDEN DAVID MANUEL

1 patent
US10819321B1Oct 27, 2020

Switchable active balanced-to-unbalanced phase shifter

ZAIDEN DAVID MANUEL8 citations74

DRAPER LAB CHARLES S

1 patent
US9337533B2May 10, 2016

Ground plane meandering in Z direction for spiral antenna

DRAPER LAB CHARLES S1 citations46