FRANCIS DANIEL MCGAFFIGAN, JR
Pilots at Avenida Sierra, Escondido, CA

License number
California A2404964
Issued Date
Jan 2017
Expiration Date
Jan 2019
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
3322 Avenida Sierra, Escondido, CA 92029

Professional information

Francis Mcgaffigan Photo 1

Decoupling Between Plural Antennas For Wireless Communication Device

US Patent:
6496150, Dec 17, 2002
Filed:
Jun 29, 2001
Appl. No.:
09/896151
Inventors:
Kevin Li - San Diego CA
Zhan Li - San Diego CA
Francis Daniel McGaffigan - Escondido CA
Faton Tefiku - San Diego CA
Assignee:
Nokia Corporation - Espoo
International Classification:
H01Q 124
US Classification:
343702, 343725, 343850
Abstract:
An electronic device having multiple antennas and capable of operating in a wireless communication system, where interference between the multiple antennas is minimized using a detuning circuit activated by one or more antennas and resulting in detuning of at least one of the antennas. Activation of the detuning circuit can be accomplished by positioning an antenna to complete the detuning circuit and thereby activate the detuning circuit.


Francis Mcgaffigan Photo 2

Dual Frequency Reflector Antenna Feed Element

US Patent:
5892485, Apr 6, 1999
Filed:
Feb 25, 1997
Appl. No.:
8/804637
Inventors:
John Glabe - Ramona CA
Francis D. McGaffigan - Escondido CA
Assignee:
Pacific Antenna Technologies - San Diego CA
International Classification:
H01Q 142
US Classification:
343789
Abstract:
A dual frequency feed element for a parabolic reflector antenna system, comprising a conductive cavity having a central axis, the cavity mounted at the focal point of a parabolic reflector surface and defined about its outer perimeter by an upstanding cavity wall, and having a closed cavity floor and an open top directed toward the reflective surface, a dual frequency radiating element centrally disposed in the cavity and arranged to radiate a first low frequency signal out through the cavity open top to the antenna surface, a conductive floor fixed below the radiating element a distance in relation to the radiant energy for the first low frequency signal, and disposed in the cavity transverse to the central axis thereof to reflect radiant energy for the first signal and, a frequency selective surface fixed below the radiating element, apart from the conductive floor, and transverse to the central axis of the cavity to reflect radiant energy for the second, higher frequency signal while simultaneously being invisible to the lower frequency signal.


Francis Mcgaffigan Photo 3

Single-Element, Multi-Frequency, Dipole Antenna

US Patent:
5898411, Apr 27, 1999
Filed:
Oct 30, 1996
Appl. No.:
8/738459
Inventors:
Francis D. McGaffigan - Escondido CA
John Glabe - Ramona CA
Assignee:
Pacific Antenna Technologies, Inc. - San Diego CA
International Classification:
H01Q 916
US Classification:
343801
Abstract:
A single element, multi-frequency dipole antenna including two substantially equal arm sections of conductive material extending co-axially in a straight line in opposite directions from each other, each arm section being a mirror image of the other arm section throughout its entire length, each arm section including at least two contiguous shorter sub-sections of j. sub. 1, j. sub. 2,. . . j. sub. n lengths, wherein j. sub. 1 represents the length of the innermost sub-section, sub-sections terminated by discontinuities wherein j. sub. 1 represents the 1/4 wavelength of the highest resonant frequency and each consecutive-integer sequence of j sub-sections represent the 1/4 wavelength of lower resonant frequencies.


Francis Mcgaffigan Photo 4

Antenna

US Patent:
2013030, Nov 21, 2013
Filed:
May 18, 2012
Appl. No.:
13/475345
Inventors:
Niels B. Larsen - Escondido CA, US
Ping Hui - San Diego CA, US
Yonghua Wei - San Diego CA, US
Francis McGaffigan - Escondido CA, US
Nan Xu - San Diego CA, US
Kiril Stoynov - San Diego CA, US
International Classification:
H01Q 1/24, H01P 11/00
US Classification:
343702, 29601
Abstract:
An apparatus including an antenna; a first antenna carrier forming a first support substrate for a first portion of the antenna; and a different second antenna carrier forming a second support substrate for a second portion of the antenna. The first and second antenna carriers are coupled to each other. The antenna extends across a joint between the first and second antenna carriers.