Patent
Satellite-tracking millimeter-wave reflector antenna system for mobile satellite-tracking
Reads0
Chats0
TLDR
In this article, a two-way mobile satellite tracking antenna system mounted on a movable vehicle includes a miniature parabolic reflector dish having an elliptical aperture with major and minor elliptical axes aligned horizontally and vertically, respectively, to maximize azimuthal directionality and minimize elevational directionality to an extent corresponding to expected pitch excursions of the movable ground vehicle.Abstract:
A miniature dual-band two-way mobile satellite-tracking antenna system mounted on a movable vehicle includes a miniature parabolic reflector dish having an elliptical aperture with major and minor elliptical axes aligned horizontally and vertically, respectively, to maximize azimuthal directionality and minimize elevational directionality to an extent corresponding to expected pitch excursions of the movable ground vehicle. A feed-horn has a back end and an open front end facing the reflector dish and has vertical side walls opening out from the back end to the front end at a lesser horn angle and horizontal top and bottom walls opening out from the back end to the front end at a greater horn angle. An RF circuit couples two different signal bands between the feed-horn and the user. An antenna attitude controller maintains an antenna azimuth direction relative to the satellite by rotating it in azimuth in response to sensed yaw motions of the movable ground vehicle so as to compensate for the yaw motions to within a pointing error angle. The controller sinusoidally dithers the antenna through a small azimuth dither angle greater than the pointing error angle while sensing a signal from the satellite received at the reflector dish, and deduces the pointing angle error from dither-induced fluctuations in the received signal.read more
Citations
More filters
Patent
Hydrophobic coating compositions, articles coated with said compositions, and processes for manufacturing same
TL;DR: In this paper, a trifluoromethyl-containing component and a hardenable material are combined to create extremely hydrophobic and scratch-resilient coating compositions.
Patent
Satellite locator system
TL;DR: A satellite locator system used with a motor home has a parabolic reflector antenna dish, feedhorn and signal converter mounted on a turntable supporting electronic controls and elevation and azimuth motors.
Patent
Pixel-shifting projection lens assembly to provide optical interlacing for increased addressability
Arlie R. Conner,Gary B. Kingsley +1 more
TL;DR: In this paper, an electro-mechanical transducer is coupled to the pixel-shifting element to impart on it the cyclic shifting between positions of the projection lens assembly.
Patent
A terminal and a method for communicating simultaneously on two frequencies
TL;DR: In this article, a system for communicating with one or more satellites over two frequencies, where information identifying the second frequency is transmitted over the first frequency, is described, where the most important data is transmitted on the first channel at which communication usually is the most stable, whereas communication over the second channel usually has a higher bandwidth.
Patent
Easy set-up, low profile, vehicle mounted, in-motion tracking, satellite antenna
TL;DR: In this article, a low profile, vehicle mounted, in-motion tracking, satellite antenna includes a pair of antenna assemblies mounted in parallel on a rotatable platform, each antenna assembly includes two subreflectors with a plastic matching element.
References
More filters
Patent
Microstrip phase scan antenna array
TL;DR: In this paper, a microstrip phase scan antenna array is provided having a columnar array microstrip radiating patches mounted on a dielectric substrate, each column of the array is fed by a separate variable, reciprocal ferrite rod phase shifter which is mounted on the substrate and is coupled to the column which it controls and to a source of millimeter wave energy by microstrip-to-dielectric waveguide transitions.
Patent
Microstrip antenna structures and arrays
TL;DR: In this article, a microstrip antenna structure formed from a unitary conducting surface separated from a ground plane by a dielectric film where the r.f. radiators are fed from an outside edge to selectively produce linearly and/or circularly polarized radiation at a selected resonant frequency(s).
Patent
Deployable satellite antenna for use on vehicles
TL;DR: In this paper, a deployable satellite antenna system with elevation and azimuth control on the roof of a vehicle is described. But the antenna is not attached to the vehicle.
Patent
Circular polarization antenna
TL;DR: In this article, a circular polarization antenna with wide-band circular polarization characteristics and impedance characteristics is achieved by feed N-antenna elements which are shifted at an interval of π/N rad. with respect to the boresight direction with differential phase shift of an interval corresponding to the angular orientation of the antenna elements.
Patent
Plug-in package for microwave integrated circuit having cover-mounted antenna
TL;DR: In this article, a TO-style plug-in package for MMICs and associated antenna structure is comprised of a microwave circuit component carrier having a generally cylindrically shaped conductive header upon which one or more MIMO ICs are supported.