A UHF RFID system used in a closed volume comprising: a UHF antenna set including at least one flat UHF antenna, a support for the UHF antenna set, and a first axle holding the support, the UHF antenna set being configured to rotate around a first axis forming an axis of symmetry for the first axle and driven by a first electrical motor, the UHF RFID system being configured for the UHF antenna set to provide a tridimensional scanning coverage around the UHF RFID system and to generate a shifting pattern of UHF intensity peaks within the closed volume.

A system to accurately and consistently read Radio-Frequency Identification (RFID) information from RFID tags placed upon objects. The system features a moving antenna or antenna array pointed toward a target detection zone. In some embodiments, a portal is constructed having electromagnetic shielding properties and containers carrying RFID tagged objects are loaded through the portal. In other embodiments, multiple antenna arrays are installed within the portal. Movement of antenna arrays may be provided using a non-electronic motor or actuator to suppress potential electromagnetic interference. A method of accurately and consistently reading RFID information from RFID sources by providing the antenna(s) and portal passing objects having RFID tags proximate the antenna(s) and through the portal, and optimizing the angle by which the antennas and/or antenna arrays may best read the RFID signals upon a target detection zone via movement of the antenna(s).

A configuration that achieves stable wireless communication. In this configuration, electrical power according to transmission waves is reliably supplied to a wireless tag serving as a target of wireless communication. A first wireless communication device and a second wireless communication device are provided. Both the wireless communication devices substantially simultaneously transmit transmission waves on different channels separated from each other by a predetermined frequency or more on a frequency band in the frequency axis, when performing wireless communication processing to wirelessly communicate with a wireless tag in a predetermined communication area.

A communication circuit according to one embodiment includes a single element antenna, a plurality of signal-limiting circuits, a high-frequency transceiver circuit, and a low-frequency transceiver circuit. The high-frequency transceiver circuit is adapted to be selectively coupled to the single element antenna via the plurality of signal-limiting circuits and tuned to operate at a high frequency carrier frequency, and the low-frequency transceiver circuit is adapted to be selectively coupled to the single element antenna via the plurality of signal-limiting circuits and tuned to operate at a low frequency carrier frequency.

A system to accurately and consistently read Radio-Frequency Identification (RFID) information from RFID tags placed upon objects. The system features a moving antenna or antenna array pointed toward a target detection zone. In some embodiments, a portal is constructed having electromagnetic shielding properties and containers carrying RFID tagged objects are loaded through the portal. In other embodiments, multiple antenna arrays are installed within the portal. Movement of antenna arrays may be provided using a non-electronic motor or actuator to suppress potential electromagnetic interference. A method of accurately and consistently reading RFID information from RFID sources by providing the antenna(s) and portal passing objects having RFID tags proximate the antenna(s) and through the portal, and optimizing the angle by which the antennas and/or antenna arrays may best read the RFID signals upon a target detection zone via movement of the antenna(s).

Various switchable RFID devices are disclosed. These switchable RFID devices may include one or more RFID tags and one or more switches. Some of these one or more switches are optionally wireless. In various embodiments, the switchable RFID devices include cellular phones, security devices, identity devices, financial devices, remote controls, and the like. The switchable RFID devices are optionally disposed in a passport.

An aircraft fuel system includes a fuel tank and at least one electrically-operated sensor arranged within the fuel tank. The at least one electrically-operated sensor is configured to measure a property of fuel in the fuel tank. At least one wireless power transmission device is arranged relative to the fuel tank, the at least one power transmission device is configured to wirelessly transmit electric power to the at least one electrically-operated sensor.

Implementations of the present disclosure are directed to conserving energy of an injection device by using a sensor attached to the housing, the sensor configured to detect a signal associated with an amount of medicament within the injection device and to generate a sensor signal based on the signal, a control component coupled to the sensor, the control component configured to harvest energy to process the sensor signal and to generate injection device data, and an antenna coupled to the control component and configured to transmit a radio frequency signal based on the injection device data.

An intelligent tracking system generally includes one or more tracking devices, some of which may be passive tracking devices. Each passive tracking device includes one or more transceivers and is energized by an energizing signal. Some of these passive tracking devices may operate in a first communication mode or a second communication mode based on the energizing signal. Some tracking devices may include encryption modules or authentication modules. Some of these devices may incorporate a bulk acoustic wave oscillator.

Implementations of the present disclosure are directed to conserving energy of an injection device by using a sensor attached to the housing, the sensor configured to detect a signal associated with an amount of medicament within the injection device and to generate a sensor signal based on the signal, a control component coupled to the sensor, the control component configured to harvest energy to process the sensor signal and to generate injection device data, and an antenna coupled to the control component and configured to transmit a radio frequency signal based on the injection device data.