An object is capable of contactless communication with a reader by active charge modulation. The object includes an antenna, an impedance matching circuit, a memory, and a controller connected to the antenna through the impedance matching circuit. The antenna, the an impedance matching circuit and the controller together form a resonant circuit having a resonant frequency. The controller is configured to cause the object to transmit, in the absence of a signal received from a reader, a signal at the resonant frequency, to determine a characteristic obtained from the signal uniquely transmitted by the object, and to perform an adjustment of a phase shift within the object based on the characteristic and an indication stored in the memory, the indication linking values of phase shifts with values of the characteristic.

The proposed invention discloses an automatic search method for a structural mode signal of a chipless RFID tag. A reference plane, a target to be tested, a reader antenna and a reader are set in space. The target to be tested is located within the reading range of the reader antenna. The distance difference between the tag and the reference plane, to the antenna, is measured by using the phenomenon of the backscattered signals of the tag and the reference plane interfering in space, to obtain the distance between the tag and the antenna. The time period for extracting the antenna mode of the tag may maximize the use of the antenna mode signal, thereby enhancing the accuracy of reading the tag.

Systems and methods for integrating tags with items. The methods comprise: dynamically determining a length of each metal thread to be incorporated into or trace to be disposed on a item to optimize tag performance in view of dielectric and tuning properties of the item. In the metal thread scenarios, the methods also involve: creating a metal thread having the length that was dynamically determined; and sewing the metal thread into the item being produced to form an antenna for a first tag. In the trace scenarios, the methods also involve forming the trace on the item being produced to form an antenna for a first tag. Next, at least a communications enabled device is attached to the item so as to form an electrical coupling or connection between the communications enabled device and the at least one antenna.

A method of stabilizing a RFID testing procedure for testing a RFID tag includes placing a RFID tag on a surface, placing a textile on the RFID tag and transmitting a first radio frequency signal to the RFID tag, and measuring a first signal from the RFID tag received in response to transmitting the first radio frequency signal to the RFID tag. The exemplary method further includes placing a first spacing object having a first spacing length between the RFID tag and the textile, the first spacing length extending from the RFID tag to the textile, transmitting a second radio frequency signal to the RFID tag, and measuring a second signal from the RFID tag received in response to transmitting the second radio frequency signal to the RFID tag. The method further includes analyzing the first signal and the second signal to determine whether the RFID tag is operational.

Methods and devices for performing dynamic compensation of a phased array RFID reader are disclosed herein. An example method includes configuring an RFID reader having an antenna array to compensate for determined antenna element phase-shift errors. The method includes exciting a reference antenna element of the antenna array, emitting an emitted signal, receiving the emitted signal via a receiver antenna element of the antenna array, and generating a received signal. The method further includes determining, by a processor, a phase shift of the received signal relative to the emitted signal, and determining a phase-shift error. The method then includes configuring the RFID reader to compensate for the determined phase-shift error associated with the receiver antenna element in response to receiving an RFID tag signal.

Provided are a mobile terminal-based NFC stress testing method and system, and a storage device. The method comprises: connecting to a computer to acquire a preset count and a preset frequency; activating an NFC service; determining whether a flag bit is enabled, and if so, detecting an NDEF message, or if not, waiting for the computer terminal to modify the flag bit to be enabled before detecting an NDEF message; and uploading, by a hardware abstraction layer, the NDEF message to an NFC application, disabling a service flag bit, and returning to wait for the computer terminal to modify the flag bit, until detection is complete.

Methods and systems are provided for testing and/or programming a thread-type string of RFID tags or devices. A thread-type RFID tag is formed on a length or thread having an RFID chip, a first antenna section and a second antenna section, the first and second antenna sections being positioned on the length of thread on opposite sides of the RFID chip. An RFID reader is positioned in electronic communication with a first coupler and a second coupler lying along a path, and the RFID tag and couplers are in relative motion with respect to each other such that the first and second couplers are on opposite sides of the RFID chip. A differential electric field is applied between the first coupler and the second coupler and across the RFID chip whereby the RFID reader couples to the RFID chip and interacts with the RFID tag to carry out testing and/or programming tasks with respect to the RFID tag.

Provided are a mobile terminal-based NFC stress testing method and system, and a storage device. The method comprises: connecting to a computer to acquire a preset count and a preset frequency; activating an NFC service; determining whether a flag bit is enabled, and if so, detecting an NDEF message, or if not, waiting for the computer terminal to modify the flag bit to be enabled before detecting an NDEF message; and uploading, by a hardware abstraction layer, the NDEF message to an NFC application, disabling a service flag bit, and returning to wait for the computer terminal to modify the flag bit, until detection is complete.

The present disclosure relates to a pre-5.sup.th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4.sup.th-Generation (4G) communication system such as Long Term Evolution (LTE). An electronic device and an operation method thereof are provided for testing performance of a radio frequency integrated circuit (RFIC) in a wireless communication system. The method includes checking a connection state of elements operable as combiners and a plurality of RF chains of the RFIC; performing control to output RF signals from the plurality of RF chains; acquiring an integrated signal by combining the RF signals via the combiners; and determining a quality indicator for the RFIC based the integrated signal.

Systems and methods for integrating tags with items. The methods comprise: dynamically determining a length of each metal thread to be incorporated into or trace to be disposed on a item to optimize tag performance in view of dielectric and tuning properties of the item. In the metal thread scenarios, the methods also involve: creating a metal thread having the length that was dynamically determined; and sewing the metal thread into the item being produced to form an antenna for a first tag. In the trace scenarios, the methods also involve forming the trace on the item being produced to form an antenna for a first tag. Next, at least a communications enabled device is attached to the item so as to form an electrical coupling or connection between the communications enabled device and the at least one antenna.