Robert Devore

US Patent:

53411480, Aug 23, 1994

Filed:

Nov 29, 1991

Appl. No.:

7/799793

Inventors:

Carlton H. Walter - Poway CA
Donn V. Campbell - Poway CA
Robert V. Devore - Ramona CA

Assignee:

TRW Inc. - Redondo Beach CA

International Classification:

H01Q 1112

US Classification:

343742

Abstract:

A compact high frequency multi-turn loop antenna is provided for use on a conductive structure such as the airframe of an airborne vehicle. The antenna employs a plurality of interconnected conductive loops which are magnetically coupled to a conductive structure. One end of the conductive loops is coupled via tuning and impedance matching circuits to a transceiver for transmitting and receiving signals therefrom. The other end of the conductive loops is coupled to ground. When transmitting a signal, the transceiver excites a current on the conductor which induces a magnetic field that excites the conductive structure. Upon receiving a signal, the conductive structure is excited which in turn generates a magnetic field through the plurality of loops and induces a current on the conductor. The antenna may advantageously be mounted within a conductive cavity structure which in turn is connected to the conductive structure.

US Patent:

56525982, Jul 29, 1997

Filed:

Feb 20, 1996

Appl. No.:

8/603379

Inventors:

Donn V. Campbell - Poway CA
Carlton H. Walter - Poway CA
Robert V. DeVore - Ramona CA

Assignee:

TRW, Inc. - Redondo Beach CA

International Classification:

H01Q 904

US Classification:

343791

Abstract:

In the preferred embodiment of the invention, a broadband dipole antenna 10 for transmitting and receiving electromagnetic energy constructed of coaxially aligned radiating elements 14 and 16 is provided. Each of the radiating elements 14 and 16 has a charge collector 40 and 42 affixed to its free end, that function to collect charges forming a current sink for collecting the current generated by the radiating elements. Coupled with the radiating elements is an isolation choke 44 to isolate the radiating elements against electrical disturbances caused by the antenna support platform 130 and 138 effecting a match of the impedance between the radiating elements and the transmission lives. Another preferred embodiment is a monopole 86 equipped with a charge collector 96. The dipole 10 and monopole 86 are provided pairs of open-sleeves 28 and 26 and 92 and 94 to enhance the instantaneous bandwidth of the radiating elements.