Joseph G Mcgowan

US Patent:

39672182, Jun 29, 1976

Filed:

Sep 26, 1975

Appl. No.:

5/617210

Inventors:

Joseph W. McGowan - Spring Lake Heights NJ

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01P 134

US Classification:

333 11

Abstract:

An edge-guided mode microstrip device having a pair of input ports and a mon output port, with two separate ferrite substrates each having a microstrip conductor electrically connected between a respective input port and the common output port. Both microstrip conductors additionally each have a conductive or inner edge spanned by a resistive film which acts as a resistive load. The other or outside conductive edge of each of the conductors includes an exponentially tapered segment which when a predetermined biasing magnetic field is applied transversely relative to the field of the substrates, causes input microwave energy at the two input ports to travel along the respective exponentially tapered edges and combine at the common output port. Any reflective energy returning from the output port will travel along the inner edges and be absorbed in the resistive load.

US Patent:

39684580, Jul 6, 1976

Filed:

Sep 26, 1975

Appl. No.:

5/617209

Inventors:

Joseph W. McGowan - Monmouth NJ

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01P 136

US Classification:

333 242

Abstract:

An edge-guided mode microstrip device similar to an edge-guided mode isolr having opposed straight and tapered edges along which microwave energy is adapted to travel with the exception that in the subject invention the thickness of the ferrite substrate underlying one tapered edge is abruptly changed in order to obtain mismatch thereat causing energy traveling along said one tapered edge to be reflected back along the same edge to the port whence it came. Coupling a microwave power amplifier to a port of a microwave circulator by means of a respective power reflector according to the subject invention provides a simple yet effective power combiner for microwave signals.

US Patent:

40286320, Jun 7, 1977

Filed:

Sep 17, 1975

Appl. No.:

5/614711

Inventors:

John L. Carter - Ocean NJ
Joseph McGowan - Spring Lake Heights NJ

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H03F 360
H01P 136

US Classification:

330 53

Abstract:

A novel microwave power divider is disclosed that is a combination of an ort junction circulator and a novel isolator-mismatch device for each circulator port other than one input port and divides microwave signal power incident to the input port into any desired ratio among the output ports and isolates all the ports from microwave power reflected back toward the divider after being propagated through the divider and thus prevents interaction among line devices, e. g. amplifier units, that are fed by the output ports. Also a novel microwave power combiner is disclosed that is a combination of an N-port junction circulator and a novel isolator-reflector device for each port other than one output port to combine at the one output port identical microwave signals or microwave signals that differ in frequency or phase incident to the isolator-reflector devices. The microwave power combiner, like the microwave power divider, provides isolation among the signal transmission lines. Also a novel solid-state microwave power amplifier is disclosed that includes the novel power divider, a solid-state power amplifier unit for each power fraction from the outputs of the divider and the novel power combiner for the amplified outputs of the power divider.

US Patent:

39696936, Jul 13, 1976

Filed:

Apr 25, 1975

Appl. No.:

5/571670

Inventors:

John L. Carter - Ocean NJ
Joseph McGowan - Spring Lake Heights NJ

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01P 110
H01P 118
H01P 132
H01P 512

US Classification:

333 98S

Abstract:

A standby microwave transmitter power amplifier tube is switched into a microwave power distribution system for a phased array in microseconds when any transmitter tube feeding any one of the radiating elements falls and all the radiating elements continue to be fed by respective transmitter tubes after the switching is completed, the switching being accomplished by changing electrical length of a quarter-wavelength waveguide stub to one-half wavelength by switching a reciprocal latching ferrite phase shifter in the stub, in response to termination of microwave power from one of the feed tubes.

US Patent:

39861473, Oct 12, 1976

Filed:

Oct 3, 1975

Appl. No.:

5/619287

Inventors:

John L. Carter - Ocean NJ
Joseph McGowan - Spring Lake Heights NJ

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01P 136
H01P 138
H01P 512

US Classification:

333 11

Abstract:

A novel microwave power divider is disclosed that is a combination of an N-port junction circulator and a novel isolator-mismatch device for each circulator port other than one input port and divides microwave signal power incident to the input port into any desired ratio among the output ports and isolates all the ports from microwave power reflected back toward the divider after being propagated through the divider and thus prevents interaction among line devices, e. g. amplifier units, that are fed by the output ports. Also a novel microwave power combiner is disclosed that is a combination of an N-port junction circulator and a novel isolator-reflector device for each port other than one output port to combine at the one output port identical microwave signals or microwave signals that differ in frequency or phase incident to the isolator-reflector devices. The microwave power combiner, like the microwave power divider, provides isolation among the signal transmission lines. Also a novel solid-state microwave power amplifier is disclosed that includes the novel power divider, a solid-state power amplifier unit for each power fraction from the outputs of the divider and the novel power combiner for the amplified outputs of the power divider.

US Patent:

39538532, Apr 27, 1976

Filed:

Jun 25, 1974

Appl. No.:

5/482946

Inventors:

John L. Carter - Ocean NJ
Joseph McGowan - Spring Lake Heights NJ

Assignee:

The United States of America as represented by the Secretary of the Army - Washington DC

International Classification:

H01Q 326

US Classification:

343100SA

Abstract:

A standby microwave transmitter power amplifier tube is switched into a mowave power distribution system for a phased array in microseconds when any transmitter tube feeding any one of the radiating elements fails and all the radiating elements continue to be fed by respective transmitter tubes after the switching is completed, the switching being accomplished by changing electrical length of a quarter-wavelength waveguide stub to one-half wavelength by switching a reciprocal latching ferrite phase shifter in the stub, in response to termination of microwave power from one of the feed tubes.