Charles M Knop

6480163, Nov 12, 2002

Dec 16, 1999

09/465360

Charles M. Knop - Lockport IL
Gregory S. Orseno - Lockport IL

Andrew Corporation - Orland Park IL

H01Q 1310

343770, 343771, 333237

A radiating coaxial cable having a longitudinal axis comprises an inner conductor having a longitudinal axis wherein the axis of the inner conductor defines the axis of the cable. A dielectric material surrounds the inner conductor. A continuous outer conductor surrounds the dielectric in direct contact therewith and is spaced from the inner conductor. The outer conductor has a plurality of slots disposed therein. Adjacent slots are spaced in the axial direction a distance S. One or more adjacent slots are grouped together in a cell. The cable has a plurality of cells. Adjacent cells are angularly disposed from each other by an angle.

6639566, Oct 28, 2003

Sep 20, 2001

09/961064

Charles M. Knop - Lockport IL
Robert Gunnells - Lockport IL
John Myhre - Western Springs IL
Greg Orseno - Lockport IL

Andrew Corporation - Orland Park IL

H01Q 1302

343780, 343786

A hog-horn antenna for producing two orthogonally polarized signals. The elevation plane pattern of each signal can be made to have virtually any shape, but is typically of a substantially cosecant-squared shape. In providing for the dual-polarization capability, the hog-horn antenna is designed to produce substantially equal gains for orthogonal polarizations, either simultaneously or separately. Two techniques to substantially equate the elevation plane radiation patterns of the two polarizations include corrugating or absorber-lining the surfaces of portions of the hog-horn antenna. Azimuthal pattern control may be achieved by corrugated/absorber lined flanges.

6759992, Jul 6, 2004

Feb 12, 2002

10/074168

Charles M. Knop - Lockport IL
Nabil Soliman - The Colony TX
Greg Orseno - Lockport IL

Andrew Corporation - Orland Park IL

H01Q 1302

343786, 343840

A microwave antenna for use in a sectorized cellular communication system comprises a wide-flare pyramidal horn having two pairs of opposed flared side walls. At least one of the two pairs of opposed walls has corrugated interior surfaces. The length of the horn and the flare angle of the walls having the corrugated interior surfaces are selected to produce a ratio / greater than 1. 5, where /=[a/(2/)] tan ( /2) is the spherical-wave error of said horn, is the free space wavelength of the microwave signals to be transmitted by said antenna, is the horns aperture width, and the half-angle of the horn in the horizontal plane.

60115211, Jan 4, 2000

Apr 22, 1997

8/840603

Charles M. Knop - Lockport IL
Edward L. Ostertag - New Lenox IL
Gregory S. Orseno - Lockport IL
Robert Gunnels - Lockport IL

Andrew Corporation - Orland Park IL

H01Q 1919

343781P

An omnidirectional microwave antenna comprises a paraboloidal reflector disposed above the ground and facing downwardly with a substantially horizontal aperture and a substantially vertical axis. A vertically oriented feed horn is located below the paraboloidal reflector on the axis of the paraboloidal reflector and has a phase center located near the focal point of the paraboloidal reflector. A conical reflector having a shaped reflecting surface defined by the parameters of a mathematical equation extends downwardly away from the periphery of the feed horn for reflecting radiation received vertically from the paraboloidal reflector in a horizontal direction away from the conical reflector, and for reflecting horizontally received radiation vertically to the paraboloidal reflector. A radome extends downwardly from the outer periphery of the paraboloidal reflector and includes an absorber material for absorbing radiation propagated laterally from the feed horn and the conical reflector above the aperture of the feed horn.

44108923, Oct 18, 1983

May 26, 1981

6/267267

Charles M. Knop - Lockport IL
Edward L. Ostertag - New Lenox IL
Donald W. Matz - Lockport IL

Andrew Corporation - Orland Park IL

H01Q 1300

343786

A feed horn for a reflector-type microwave antenna comprises a smooth-walled conical horn and a lining of absorber material on the inside wall of the horn for reducing the width of the RPE (radiation pattern envelope) in the E plane of the antenna. The lining of absorber material extends from the wide end of the conical feed toward the narrow end thereof, terminating at a point where the horn diameter is about 7 times the longest wavelength of the microwave signals being transmitted. The width of the RPE in the E-plane of the antenna can be reduced to be nearly equal to the width of the RPE of the H-plane of the antenna without significantly degrading this H-plane RPE from its shape without absorber and without significantly changing the gain of the antenna.

46268634, Dec 2, 1986

Sep 12, 1983

6/531069

Charles M. Knop - Lockport IL
Edward L. Ostertag - New Lenox IL

Andrew Corporation - Orland Park IL

H01Q 1919

343781P

A microwave antenna comprising the combination of a paraboloidal main reflector; a subreflector located such that the paraboloidal main reflector and the subreflector have a common focal point lying between the main reflector and the subreflector; a feed horn for transmitting microwave radiation (preferably symmetrically) to, and receiving microwave radiation from, said subreflector; and a shield connected to the peripheral portion of the subreflector and having an absorbing surface which reduces side lobe levels both by capturing the feed horn spillover energy and by reducing the diffraction of microwave radiation from the edge of the subreflector. The shield is preferably formed as a continuous axial projection extending from the periphery of the subreflector toward the main reflector substantially parallel to the axis of the feed horn. The reflective surface of the subreflector is suitably a section of an approximate ellipse.

46046275, Aug 5, 1986

Jan 11, 1984

6/569789

Saad S. Saad - Willowbrook IL
Charles M. Knop - Lockport IL

Andrew Corporation - Orland Park IL

H01Q 1302

343786

A horn-reflector antenna comprising a paraboloidal reflector for transmitting and receiving microwave energy, and a flared feed horn for guiding microwave energy to and from the reflector, the longitudinal shape of at least a section of the horn at the end where the horn begins to flare outwardly being defined by the equation ##EQU1## where R is the transverse dimension from the longitudinal axis of the horn to the side wall of the horn 1 is the axial distance along the horn measured from the end where the horn begins to flare outwardly, R. sub. 1 and R. sub. 2 are the radii of the horn at opposite ends of the horn section defined by the equation, L is the axial length of the horn section defined by the equation, and the exponent p has a value greater than two and less than about 7, to effect a substantial reduction in the TM. sub. 11 mode level.

45531129, Nov 12, 1985

May 31, 1983

6/499318

Saad S. Saad - Chicago IL
Charles M. Knop - Lockport IL

Andrew Corporation - Orland Park IL

H01P 1162

333 21R

A phased-overmoded, tapered waveguide transition has a central section which is tapered linearly in the longitudinal direction and two end sections which are tapered curvilinearly in the longitudinal direction. One of the end sections and at least a portion of the other end section are overmoded and, therefore, give rise to higher order modes of the desired microwave signals propagated therethrough. The lineraly tapered central section shifts the phase of higher order modes generated at one end of the transition so that at least a major portion of such higher order modes is cancelled by higher order modes generated at the other end of the transition.