1
Adrian E Popa: Millimeter wave transmission line using thallium bromo-iodide fiber. Hughes Aircraft Company, Kenneth W Float, William H MacAllister, Paul M Coble, October 6, 1981: US04293833 (174 worldwide citation)

Millimeter wave transmission lines are disclosed for propagating electromagnetic waves of a wavelength ranging from about 10 mm to about 0.4 mm. The transmission lines comprise a fiber of co-crystallized thallium bromo-iodide consisting of from about 40 mole percent to about 46 mole percent thallium ...


2
Adrian E Popa, William B Bridges: Coaxial dielectric rod antenna with multi-frequency collinear apertures. HRL Laboratories, Ladas & Parry, December 31, 2002: US06501433 (153 worldwide citation)

An antenna. The antenna includes a first dielectric antenna rod having a first dielectric constant. The first dielectric antenna rod is coupled to a first frequency transmission source for propagating first frequency band radiation from the first dielectric antenna rod into a medium having a medium ...


3
Adrian E Popa, William B Bridges: Coaxial dielectric rod antenna with multi-frequency collinear apertures. HRL Laboratories, Ladas & Parry, July 24, 2001: US06266025 (148 worldwide citation)

An antenna. The antenna includes a first dielectric antenna rod having a first dielectric constant. The first dielectric antenna rod is coupled to a first frequency transmission source for propagating first frequency band radiation from the first dielectric antenna rod into a medium having a medium ...


4
Harry T Wang, Irwin L Newberg, Adrian E Popa, Robert R Hayes, John K Keigharn, Bill H Otoide: Programmable fiber optic delay line, and radar target simulation system incorporating the same. Hughes Aircraft Company, V D Duraiswamy, W K Denson Low, January 5, 1993: US05177488 (57 worldwide citation)

A programmable fiber optic delay system employs multiple programmable fiber optic delay lines, and switches among the delay lines for inclusion in an overall delay path. Switching among the delay lines is coordinated with the programming of those lines so that only a delay line with a settled delay ...


5
Michael Wechsberg, Adrian E Popa: Fiber optic feed network for radar. Hughes Aircraft Company, Thomas A Runk, A W Karambelas, March 21, 1989: US04814773 (35 worldwide citation)

In a radar having electrical transmitting and receiving circuitry, and an antenna for the radiation of microwave signals, there is provided an optical feed system which couples the antenna with the transmitting and receiving circuitry. The feed system includes a set of optical multiplexers interconn ...


6
Jan Grinberg, Emanuel Marom, Bernard H Soffer, Thomas R O Meara, Adrian E Popa: Method and apparatus for ultra high frequency spectrum analysis. Hughes Aircraft Company, V D Duraiswamy, W K Denson Low, October 3, 1989: US04871232 (19 worldwide citation)

A high frequency spectral analysis system and method operates by modulating an optical beam with a high frequency signal to be analyzed, and sampling the beam simultaneously at periodically spaced locations along its length. The sampled portions are then focused to a spectral mapping. In the preferr ...


7
Irwin L Newberg, Adrian E Popa: Delayed replica radar test set target. Hughes Aircraft Company, Leonard A Alkov, Wanda K Denson Low, February 20, 1990: US04903029 (16 worldwide citation)

A radar test set target which is co-located with the radar and produces a faithful replica of the radar signal substantially delayed in time. The radar signal modulates a laser light which is controllable delayed in time by transmitting the modulated laser light through a fiber optic delay line. The ...


8
James H Schaffner, William B Bridges, Adrian E Popa: Electro-optic modulator. Hughes Aircraft Company, R M Heald, C D Brown, W K Denson Low, April 9, 1991: US05005932 (13 worldwide citation)

An electro-optic modulator (10) includes a pair of optical waveguide channels (20, 22) formed in an X-cut lithium niobate substrate (12) and an overlying RF coplanar waveguide (36). A periodic electrode structure (48) of the intermittent interaction type employs a plurality of middle stubs (52) to m ...


9
William B Bridges, Adrian E Popa: Evanescent-wave coupling device. Hughes Aircraft Company, A W Karambelas, W J Bethurum, June 12, 1984: US04453802 (7 worldwide citation)

A dielectric waveguide is disposed adjacent to a diode array which allows for coupling of energy therebetween. The waveguide has a core section and a cladding section encompassing a core section except in a portion thereof. The diode array is disposed adjacent to the exposed core portion at a proxim ...


10
Adrian E Popa, William B Bridges: Coaxial dielectric rod antenna with multi-frequency collinear apertures. Richard P Berg Esq, c o LADAS & PARRY, March 14, 2002: US20020030632-A1

An antenna. The antenna includes a first dielectric antenna rod having a first dielectric constant. The first dielectric antenna rod is coupled to a first frequency transmission source for propagating first frequency band radiation from the first dielectric antenna rod into a medium having a medium ...