1
Mon N Wong, Charles J Brandt: Conical horn antenna having a mode generator. Hughes Aircraft Company, R A Cardenas, John Holtrichter Jr, W H MacAllister, February 20, 1979: US04141015 (80 worldwide citation)

A conical horn antenna is disclosed having dual dielectric bands mounted therein for improving the rotational symmetry or elipticity of the radiated beam as well as the efficiency. The first and second dielectric bands are coaxially mounted to each other and to the conical horn. The lengths of the b ...


2
Richard A Dye, Donald A Rowley: Laser weapon simulator. Hughes Aircraft Company, W H MacAllister Jr, R A Cardenas, February 17, 1976: US03938262 (50 worldwide citation)

A realistic laser weapon simulator is disclosed which utilizes a laser transmitter in combination with a rifle for teaching marksmanship by firing laser "bullets" at an infrared detector equipped target. The laser weapon includes a piezoelectric crystal coupled to a laser in a housing for mounting a ...


3
Gary L Burnett, George I Tsuda: Temperature compensated microwave filter. Hughes Aircraft Company, R A Cardenas, J Holtrichter Jr, W H MacAllister, September 5, 1978: US04112398 (10 worldwide citation)

A lightweight microwave filter device is disclosed which utilizes a housing made of a lightweight metal such as aluminum having a relatively large coefficient of thermal expansion. The microwave filter also utilizes resonator elements which are either interdigital or in a comb-line filter arrangemen ...


4
Timothy A Crail, Mon N Wong: Integrated circularly polarized horn antenna. Hughes Aircraft Company, R A Cardenas, John Holtrichter Jr, W H MacAllister, February 20, 1979: US04141013 (4 worldwide citation)

A horn antenna is disclosed having a built-in circular polarizer and a cross polarization attenuator. A square-apertured horn antenna has a plurality of pairs of conductive fins disposed along opposite edges of the horn interior. The individual fins are separated from each other by approximately one ...