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James T Wiggenhorn: Method and apparatus for tuning a loop antenna. Motorola, Frank M Scutch III, November 21, 1995: US05469180 (15 worldwide citation)

A method and apparatus for rapidly determining the resonance of a loop antenna (7). In order to set the loop antenna (7) to the desired operating frequency, the antenna is used with an amplifier (15). In view of the high Q provided by the loop, it is used at the output of the amplifier (15) to creat ...


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James T Wiggenhorn: Retractable antenna assembly with bottom connector. Motorola, Andrew S Fuller, May 2, 1995: US05412393 (11 worldwide citation)

A retractable antenna assembly with a bottom connector (200) allows communication devices that require the use of more than one type of antenna element (114), to easily store the normally used antenna element (114) inside of a transmission line housing (144) which is part of the antenna assembly (20 ...


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James T Wiggenhorn: Slotted strip-line. Motorola, James W Gillman, Eugene A Parsons, June 1, 1976: US03961296 (9 worldwide citation)

First and second spaced apart, coextensive ground planes with a center conductor positioned therebetween in spaced relation from each of said planes and the volume defined by said planes being filled with a dielectric material fixedly engaging said planes and said center conductor to form a strip-li ...


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James T Wiggenhorn: Retractable antenna assembly with connector. Motorola, Pedro P Hernandez, April 12, 1994: US05302963 (7 worldwide citation)

A retractable antenna assembly with connector (200) allows communication devices that require the use of more than one type of antenna element (114), to easily store the normally used antenna element (114) inside of a housing (134) which is part of the antenna assembly (200). Once inside the housing ...


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Armando Arias, Ronald L Scheiderer, James T Wiggenhorn: Switching system utilizing flexible circuit with transmission line for matched impedance connections. Motorola, Donald B Southard, James W Gillman, February 19, 1980: US04189676 (5 worldwide citation)

Switching system for use with a radio transmitter or the like to adapt the same for operation at two different power levels, including a flexible circuit connected to stages of the transmitter and to a switch to control the power level of the signal transmitted. The flexible circuit is very thin so ...


7
Neil T Kennedy, James T Wiggenhorn: Body worn antenna. Motorola, Barbara R Doutre, July 19, 2005: US06919850 (2 worldwide citation)

An antenna array (200) having a number of patch antennas (202, 204, 206, 208) forming a circumferential radius is provided. The antenna array (200) is integrated within a body worn device (500) such as a belt, coat, or harness (210). Location tracking technology is used in conjunction with the anten ...


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James T Wiggenhorn: Electrical connector interface. Motorola, Andrew S Fuller, March 18, 1997: US05612846

An electrical connector interface (10) provides for voltage surge protection. The connector interface (10) includes electrical interface conductors (12), an electrical ground conductor (14), and a selectively conductive material (18). The ground conductor (14) is spaced apart from the electrical int ...


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