Patent
Directive antenna in a dual band phased array employing spatial second harmonics
TLDR
In this article, a directive antenna with a ground plate, an active antenna coupled to the ground plate via either a first or second reactive component, and at least one passive antenna coupled with the groundplate via a reactive component is presented.Abstract:
A directive antenna operable in multiple frequency bands includes a ground plate, an active antenna electrically coupled to the ground plate, and at least one passive antenna, coupled to the ground plate via either a first or second reactive component. When the at least one passive antenna is coupled to the ground plate via the first reactive component, an effective length of the at least one passive antenna is increased. When the at least one passive antenna is connected to the ground plate via the second reactive component, an effective length of the at least one passive antenna is decreased.read more
Citations
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Patent
Array antennas having a plurality of directional beams
TL;DR: In this paper, access point (AP) antenna apparatuses for communicating with one or more station devices by assigning a particular directional beam to each access point, and communicating with each station device using the assigned directional beam.
Patent
Dual receiver/transmitter radio devices with choke
John R. Sanford,Gary D. Schulz +1 more
TL;DR: In this article, a pair of reflectors separated by an isolation choke boundary are used to provide greater than 10 dB isolation between the first and second parabolic reflectors in a fixed configuration relative to each other so that they are aligned to send/receive in parallel.
Patent
Radio system for long-range high-speed wireless communication
Gary D. Schulz,Paul Odlyzko,John R. Sanford,Christopher Fay,Jude Lee,Charles D. Macenski,Richard J. Keniuk,Lance D. Lascari +7 more
TL;DR: In this paper, a pair of parabolic reflectors are used for point-to-point transmission/communication of high-bandwidth signals, where one of the reflectors is dedicated for sending/transmitting information and the other is dedicated to receiving information.
Patent
Agile duplexing wireless radio devices
TL;DR: In this article, the authors propose to use a detector coupled to either (or both) reflectors that monitors the transmitting frequency channel; reflections and/or radar signals may be detected and may trigger switching (manual or automatic switching) to a different duplexing modes such as frequency-division duplex (FDD), time division duplexes (TDD), etc.
Patent
Stacked array antennas for high-speed wireless communication
TL;DR: In this paper, the antenna array is configured for low impedance mismatch and may have a high gain relative to a very small and compact overall shape, where the antenna emitters are arranged in a separate plane (or planes) above an antenna feed connecting the emitting elements to the radio circuitry.
References
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Patent
Directional switch antenna device
Suguru Kojima,Takashi Enoki +1 more
TL;DR: In this paper, the authors show that even if the positions of the antenna elements are physically asymmetrical with respect to the center axis of the radiator, they are in an electrically symmetrical relation and therefore an omnidirectional radiation characteristic is achieved.
Patent
Electronically rotated antenna apparatus
Ted A. Dumas,Les V. Griffee +1 more
TL;DR: In this article, an antenna of the type having a central driven element and a plurality of surrounding parasitic elements is shown, where the basic omnidirectional pattern of the antenna is modified to a directional pattern by capacitively coupling the parasitic elements to ground but on a selective basis changing some of the parasitoid elements to be inductively coupled to ground whereby they act as reflectors and provide an eccentric signal radiation pattern.