University of South Florida

University of Vermont and State Agricultural College

Ibrahim Turki Nassar

Thomas McCrea Weller

Craig Lusk

Gokhan Mumcu

Jeffrey Frolik

In some embodiments, a mechanically reconfigurable slot antenna includes an electrically conductive layer having multiple slots, multiple electrically conductive parasitic patches, each patch associated with one of the slots, and a rack-and-pinion mechanism adapted to simultaneously linearly displace at least two of the patches along their associated slots.

Mechanically reconfigurable dual-band slot antennas

In one embodiment, a method for monitoring a structure includes associating a passive sensor with the structure, the sensor being configured to measure a physical parameter of the structure that is indicative of the structure's condition, associating a dual-channel transceiver with the structure, the transceiver having a sensing repeater that operates on a first channel and a reference repeater that operates on a second channel, wherein the sensing repeater is connected to the passive sensor, receiving with a receive antenna of the reference repeater an interrogation signal transmitted from an interrogation device, multiplying a frequency of the received interrogation signal with the reference repeater to generate a reference response signal having a multiplied frequency, and transmitting the reference response signal with the reference repeater to the interrogation device.

Compact dual-channel transceivers

In one embodiment, a dual-channel transceiver includes two harmonic repeaters each having a receive antenna, a transmit antenna, and a frequency multiplier connected to the antennas that is configured to increase the frequency of a signal received by the receive antenna to enable transmission by the transmit antenna of a reply signal having a higher frequency, wherein the harmonic repeaters operate at different frequencies from each other.

In some embodiments, a mechanically reconfigurable antenna includes a patch antenna, one or more parasitic patches, and a radially foldable linkage associated with the patch antenna that can be actuated to move the parasitic patches radially inward and radially outward relative to the patch antenna to change an electromagnetic property of the antenna.

Mechanically reconfigurable antennas

In one embodiment, a non-dispersive phase shifter includes a composite right- and left-handed (CRLH) circuit that can be toggled between a first phase delay state and a second phase delay state with a substantially constant phase shift over a range of frequencies.

Non-dispersive microwave phase shifters

In one embodiment, a repeater for wireless sensing includes a base substrate, a front substrate, a rear substrate, a receive antenna formed on the front substrate, a transmit antenna formed on the rear substrate, and a frequency multiplier formed on the base substrate between the antennas.

Growing community of inventors

Tampa, FL, United States of America

Ibrahim Turki Nassar