Abstract: An apparatus comprising a resonator structure comprising a first transmission line and first two symmetric ring-shaped stubs with substantially equal width and length, placed substantially in a middle of the first transmission line. The apparatus further comprises a cross-coupling line structure for induction of crosstalk, the cross-coupling line structure comprising a second transmission line and second two symmetric ring-shaped stubs, wherein the second transmission line is coupled to a DC or pulsed voltage source.

Abstract: An apparatus of a spiral resonator material detector, the apparatus comprising: a planar dielectric substrate; a microstrip transmission line on a first surface of the planar dielectric substrate; a spiral resonator on the first surface of the planar dielectric substrate electrically connected to the microstrip transmission line; and a ground conductor on a second surface of the planar dielectric substrate beneath the microstrip transmission line, wherein the planar dielectric substrate insulates the ground conductor from the microstrip transmission line and the spiral resonator.

Abstract: An apparatus of a patch-stub metal proximity sensor, the apparatus comprising: a planar dielectric substrate; a microstrip transmission line on a first surface of the planar dielectric substrate; a patch-stub on the first surface of the planar dielectric substrate substantially below the microstrip transmission line; a feedline on the first surface of the planar dielectric substrate substantially extending away from the microstrip transmission line, wherein the feedline electrically connects the microstrip transmission line and the patch-stub; and a ground conductor on a second surface of the planar dielectric substrate beneath the microstrip transmission line, wherein the planar dielectric substrate insulates the ground conductor from the microstrip transmission line, the patch-stub and the feedline.

Abstract: This disclosure relates to a lightweight authentication service, system and method that securely authenticates the identity of a secure user equipment (UE) or a device in a communication network system. The service and associated methods work by creating two partial secrets namely a first partial secret and a second partial secret. The first partial secret is generated by the manufacturer or the owner of the UE, which is stored on a secure location on the UE and the second partial secret is stored in a database storage system on a server in a cloud running an authentication service. The encryption of information elements is done by multiplying the information elements with the square of random numbers, the encrypted secrets are randomized and before transmission on the channel. The disclosure also describes a receiver UE that could either request an authentication service, running in a cloud, to authenticate a sender UE.

Abstract: A method of buried metal object detection is described, which includes generating RF signal in a radio frequency module, supplying RF signal to a ground penetrating radar, scanning the ground penetrating radar over an area comprising buried metal objects, and detecting a buried metal object using anomalous phase response measured in the reflected signals.

Abstract: An apparatus comprising of two microstrip resonators placed on two parallel surfaces of a planar dielectric substrate, electrically disconnected from each other. The apparatus further comprising a microstrip T-resonator comprising a transmission line and a stub, placed substantially in a middle of the transmission line, placed on the first surface of a planar dielectric substrate. The apparatus further comprises a split-ring resonator comprising two split rings, placed on the second surface of the substrate such that the adjacent edge of the split rings substantially aligns with the open-ended edge of the stub in the first surface. The apparatus further comprises two ground conductors, each placed on the opposite sides of the microstrip T-resonator and split-ring resonator. The apparatus further comprises a microstrip L-resonator, instead of the microstrip T-resonator, coupled to a rectifying circuit block to provide a DC voltage output signal.

Abstract: This disclosure relates to a lightweight authentication service, system and method that securely authenticates the identity of a secure user equipment (UE) or a device in a communication network system. The service and associated methods work by creating two partial secrets namely a first partial secret and a second partial secret. The first partial secret is generated by the manufacturer or the owner of the UE, which is stored on a secure location on the UE and the second partial secret is stored in a database storage system on a server in a cloud running an authentication service. The encryption of information elements is done by multiplying the information elements with the square of random numbers, the encrypted secrets are randomized and before transmission on the channel. The disclosure also describes a receiver UE that could either request an authentication service, running in a cloud, to authenticate a sender UE.

Abstract: An apparatus comprising a resonator structure comprising a first transmission line and first two symmetric ring-shaped stubs with substantially equal width and length, placed substantially in a middle of the first transmission line. The apparatus further comprises a cross-coupling line structure for induction of crosstalk, the cross-coupling line structure comprising a second transmission line and second two symmetric ring-shaped stubs, wherein the second transmission line is coupled to a DC or pulsed voltage source.

Abstract: The current invention provides Ground-backed Complementary Split Ring Resonators (G-CSRR) as a new class of energy collectors and transmitters for electromagnetic energy harvesting in general and wireless power transfer applications in particular. The G-CSRR structure has low profile, low fabrication cost, efficient for wide range of illumination angles and can be placed on metallic surfaces.

Abstract: Antennas developed for electromagnetic field energy harvesting, typically referred to as rectennas, provide an alternative electromagnetic field energy harvesting means to photovoltaic cells if designed for operation in the visible frequency spectrum. Rectennas also provide energy harvesting ability or power transfer mechanism at microwave, millimeter and terahertz frequencies. However, the power harvesting efficiency of available rectennas is low because rectennas employ traditional antennas whose dimensions is typically proportional or close to the wavelength of operation. This invention provides a device for electromagnetic field energy harvesting that employs a plurality of electrically-small resonators such as split-ring resonators that provide significantly enhanced energy harvesting or energy collection efficiency while occupying smaller footprint. The invention is applicable to electromagnetic energy harvesting and to wireless power transfer.