Consistent with disclosed embodiments, systems, methods, and computer readable media pertaining to a battery-less identification tag for embedding into products may be provided. Embodiments may include a flexible substrate; a first differential antenna on the flexible substrate, the first differential antenna including a first meandering arm and a second meandering arm, and the first differential antenna being of a first size; a second differential antenna on the flexible substrate, the second differential antenna including a third meandering arm and fourth meandering arm, and the second differential antenna being of a second size smaller than the first size; and at least one communications chip connected to the first differential antenna and the second differential antenna.

An RFID reading apparatus (20) for shelf occupancy detection comprises an elongated antenna (18) with an outer conductor (26) and an inner conductor (28) arranged in the outer conductor (26), an RF transceiver (22) connected with the antenna (18), and a control and evaluation unit (24) configured to communicate with an RFID transponder (14) via the RF transceiver (22) and the antenna (18) by means of RFID signals. The outer conductor (26) comprises a plurality of slot structures (16) over its longitudinal extent each for transmitting and receiving RFID signals.

A planar antenna includes a substrate formed of a dielectric; a distributed constant line formed on a first surface of the substrate, the distributed constant line including a first end to which power is supplied and a second end that is an open end or is grounded; and at least one first resonator arranged on the first surface of the substrate and within a range in which the at least one first resonator is allowed to be electromagnetically coupled to the distributed constant line in a vicinity of any of nodal points of a standing wave of a current that flows through the distributed constant line in response to a radio wave having a certain design wavelength radiated from the distributed constant line or received by the distributed constant line.

An antenna array module for a communication system on a cargo ship, includes at least a first, a second and a third antenna element, each mounted on a ground plane and containing an antenna feed. The first antenna element is tilted with respect to the second antenna element. The first and the second antenna element are arranged to radiate mainly towards a first path along the cargo ship and the third antenna element is arranged to radiate mainly towards a second path opposite to the first path.

An absorbent article has one or more fluid filter layers to inhibit electrode traces from being exposed to low volumes of fluid to reduce the number of false positives that are indicated by an RFID tag of the incontinence detection pad. An antenna inlay has a sacrificial trace portion to permit testing for proper operation of an RFID chip electrically coupled to the antenna inlay. After testing, the sacrificial trace portion is severed. A fluid barrier layer blocks fluid from reaching portions of electrode traces that are located on a backsheet outside a periphery of an absorbent core of an incontinence detection pad. The power at which an antenna transmits to wirelessly energize a passive RFID tag of an incontinence detection pad is controlled to reduce the number of false positives indicated by the RFID tag.

A method and apparatus for a co-located Radio Frequency Identification (RFID) device and ultrasonic device includes an RFID reader loop antenna element oriented parallel to a reflector panel. An ultrasonic emitter is disposed through an aperture in the reflector panel with a horn that extends through the loop element. The horn can serve as a mounting structure for the antenna element. A diameter of the aperture is less than one-quarter wavelength of an operating frequency of the RFID reader loop antenna element. The aperture is located in the reflector panel near a minimum E-field area of the RFID reader loop antenna element.

An RFID reader/writer antenna device is provided that includes a first radiating element, a second radiating element, a third radiating element, baluns, a phase shifter, and a distributor. The radiating elements each comprise conductor patterns with extending directions that are parallel to each other, and used for reading or writing of RFID tags. The distributor connects the first radiating element, the second radiating element, and the third radiating element to a common input/output. The phase shifter causes a feeding phase of the second radiating element and feeding phases of the first radiating element and the third radiating element to have a phase difference of 90°. The baluns perform conversion between a balanced signal and an unbalanced signal.

An RFID antenna is arranged in the vicinity of a metal portion of and on an outer surface side of a casing of a communication terminal device. The RFID antenna includes a magnetic core, and a coil conductor that is wound around the magnetic core. The coil conductor includes a first conductor portion positioned on a first main surface side of the magnetic core and a second conductor portion positioned on the second main surface side of the magnetic core and arranged at a different position than the first conductor portion when viewed in plan from the direction of the first and second main surfaces, and the coil conductor is arranged such that the first main surface side of the magnetic core is on the metal portion side and such that the first conductor portion of the coil conductor faces a leading end portion of the casing.

Embodiments relate to a concept for determining a transit of a movable object through a detection area within a detection plane. At least one exciter antenna provides an exciting electromagnetic field. The exciting electromagnetic field or at least one spatial component thereof has a field strength above a field strength threshold in the detection area. The exciting electromagnetic field is capable of exciting the movable object to emit an electromagnetic response signal comprising information on a position of the movable object. At least one sensor antenna comprising a magnetic core receives the electromagnetic response signal. The at least one magnetic core is positioned in a region of the exciting electromagnetic field where the field strength of the exciting electromagnetic field or the at least one spatial component thereof is below the field strength threshold.

A patient immersion sensor includes a radio detection and ranging (RADAR) apparatus to determine a time of flight (TOF) of a RADAR pulse and a reflected signal that is reflected by a patient or by a portion of a patient support surface supporting the patient. The TOF is indicative of an immersion depth or a distance toward bottoming out of a patient supported on the patient support surface, such as a mattress or a pad. The RADAR apparatus emits pulses of very short duration so as to be able to detect objects, such as a patient or a portion of a mattress or pad, at very close distances. The RADAR apparatus may use time-of-flight (TOF) between transmission of the pulse and receipt of a reflected signal to determine a distance toward bottoming out by the patient, thereby to determine if the patient is properly immersed into the patient support surface. Adjustments to inflation or deflation of one or more bladders are made to achieve a desired immersion amount within a tolerance range between upper and lower TOF thresholds.