Abstract: A passive tag receiving a reader signal provided by a reader is disclosed. The passive tag includes an antenna, an oscillator circuit, and an internal chip. The antenna receives the reader signal. The reader signal is within an operation frequency band. The oscillator circuit is coupled to the antenna and generates a frequency signal. The internal chip processes the reader signal according to power provided by the reader signal and the frequency signal when the reader signal is received and the frequency signal is generated.

Abstract: A battery-assisted radio frequency identification (RFID) tag having a battery-assisted circuit and a filter is provided. The battery-assisted circuit generates a radio frequency signal whose frequency is outside an operating frequency band of the RFID tag to supply additional power to the RFID tag. The filter filters the radio frequency signal output from the battery-assisted circuit before the RFID tag demodulates a reader command, so that a modulation depth of the read command is less affected by multi-carrier. By using the battery-assisted circuit and the filter, the RFID tag has a longer read range and is less affected by multipath fading effects.

Abstract: A radio frequency identification tag for multi-path transmission is provided, including: a plurality of antennas, receiving a wireless signal transmitted by a reader and generating an antenna signal, respectively, and backscattering an encoded and modulated backscatter signal to the reader, in which the polarizations of the plurality of antennas are different; a demodulator, demodulating the antenna signal, to generate a plurality of demodulated signals corresponding to the antenna signal; a signal processor, selecting one of the plurality of demodulated signals or combining the plurality of demodulated signals for processing according to characteristics of the plurality of the demodulated signals to read data and generating a backscatter signal; and a space-time code encode and modulator, encoding and modulating the backscatter signal according to a space-time code to generate the encoded and modulated backscatter signal.

Abstract: A battery-assisted radio frequency identification (RFID) tag having a battery-assisted circuit and a filter is provided. The battery-assisted circuit generates a radio frequency signal whose frequency is outside an operating frequency band of the RFID tag to supply additional power to the RFID tag. The filter filters the radio frequency signal output from the battery-assisted circuit before the RFID tag demodulates a reader command, so that a modulation depth of the read command is less affected by multi-carrier. By using the battery-assisted circuit and the filter, the RFID tag has a longer read range and is less affected by multipath fading effects.

Abstract: A passive tag receiving a reader signal provided by a reader is disclosed. The passive tag includes an antenna, an oscillator circuit, and an internal chip. The antenna receives the reader signal. The reader signal is within an operation frequency band. The oscillator circuit is coupled to the antenna and generates a frequency signal. The internal chip processes the reader signal according to power provided by the reader signal and the frequency signal when the reader signal is received and the frequency signal is generated.

Abstract: An electronic device. The electronic device comprises a housing, an abutment and an indexing device. The housing comprises an engaging portion and an outer surface, and the abutment disposed on the housing comprises a clamping portion accessible through the housing via the engaging portion. The indexing device is detachably disposed on the exposed clamping portion.

Abstract: A radio frequency identification (RFID) system for communicating with an RFID tag and method thereof are provided. The RFID system comprises a first power supplier, a transmitter, and a receiver. The first power supplier is configured to provide power to the RFID tag. The transmitter is configured to send a command to the RFID tag. The receiver is configured to receive a first response signal from the REID tag, wherein the first response signal is generated in response to the command.

Abstract: An electronic device. The electronic device comprises a housing, an abutment and an indexing device. The housing comprises an engaging portion and an outer surface, and the abutment disposed on the housing comprises a clamping portion accessible through the housing via the engaging portion. The indexing device is detachably disposed on the exposed clamping portion.

Abstract: A prefabricated outer wall structure with stress rupture resistance comprising a plurality of outer wall elements, each outer wall element comprising a wall component formed of an inner unit and a plurality of fixing components, in which the inner unit has a ladder slot and its outer surface is adhered to an outer decorative wall unit by means of adhesive in a manner that at least a retention slot is defined between the ladder slot and the outer decorative wall unit with an U-plate is placed within the retention slot; and each fixing component is connected to at least a hook plate corresponding to the U-plate in the wall component, while an end of the fixing component is secured to a construction structure so that the wall component is tightly secured to the construction structure.