The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 14, 2018
Filed:
Nov. 30, 2016
The Regents of the University of Michigan, Ann Arbor, MI (US);
Kamal Sarabandi, Ann Arbor, MI (US);
Mani Kashanianfard, Ann Arbor, MI (US);
The Regents of The University of Michigan, Ann Arbor, MI (US);
Abstract
A directional repeater system is presented with a simple architecture composed of wideband receive and transmit antennas, a high gain low-power amplifier and a bandpass filter suitable for use in the 2450 MHz ISM band. Close to 70 dB of isolation between transmit and receive antennas over the entire band is achieved for a compact structure. The isolation between the transmit and receive antennas is achieved using polarization mismatch between orthogonal double-stack patch antennas and a two-element receive antenna whose elements are appropriately located with respect to the edge of the substrate ground plane and the transmit antenna to cancel the signal leakage from the transmit antenna to the individual receive antennas. A major advantage of this invention is that the entire bandwidth can be used going through a chain of repeaters whereas for conventional repeaters the available bandwidth is halved for every repeater in the chain.