Development board of the autonomous semi-passive RFID transponder

Abstract

Abstract. The idea of multiband development board designed to support and advance the technique of battery-less autonomous semi-passive RFID transponders is presented in the paper. The extra function of harvesting energy from the electromagnetic field of different radio communications systems, the ultra efficient power conditioner and the energy storage block are applied in the proposed construction. The facility of utilizing gathered energy is provided to support designers in developing applications of automatic object identification. Since the evaluation board is to work without a galvanic cell, the particular emphasis is put on the mechanisms that improve energy efficient operation of the whole electronic circuit. The construction principles and operation modes (charging, cold start, sleep with charging, sleep, measurement and cut-off) of the storage unit are described in depth in the paper. The preproduction batch of the demonstrators has been manufactured on automated assembly line at ELMAK Ltd. Company, according to the elaborated model. It confirms that the author's demonstrator of the battery-less autonomous semi-passive transponder can be reproduced on an industrial scale. On the basis of the preproduction series, the performance parameters of the final product have been estimated. The presented study should significantly contribute to the RFID technique therefore the authors set up the evaluation process of marketing research and product commercialization. fication of moving objects, e.g. in the public transport (AVI -automatic vehicle identification) [7]. So it can be concluded that the observed applicable potential of the RFID technology justifies the need to develop new designs of electronic transponders. New more sophisticated solutions of electronic tags will be a factor of innovative progress in the discussed scope of use. Transponder in RFID systemIn terms of hardware (Fig. 1), an RFID system consists of a read/write device (RWD), which includes a transmitter (TX) and a receiver (RX), its antenna and at least one electronic transponder that is intended for marking an object. Communication in this system (read/write data) is provided with one (single system) or with multiple transponders simultaneously (anti-collision system). The marked objects during the identification process may be placed in fixed points (static system) or may dynamically change their location (dynamic system). The interrogation zone (IZ) is the main parameter of the RFID system, because it determines the efficiency of a given automated process [5]. The size of the IZ strongly depends on the above mentioned arrangements of RWD and transponders.According to the main classification of the RFID systems it is possible to distinguish applications operating in the inductive or radiative coupling regime. In the first group, the carrier frequency f 0 is between 100 kHz and 135 kHz (typically 125 kHz) for the LF band or 13.56 MHz of the HF band whereas in the

Designing Antennas for RFID Sensors in Monitoring Parameters of Photovoltaic Panels

“…If there is an additional supply source (typically a disposable lithium battery but also a replaceable accumulator) in its construction, then such a device is called a semipassive transponder. The main purpose of providing the extra energy source is the need to enlarge the IZ or to execute additional functions (such as data acquisitions, supervising environment, controlling actuators) without an active RWD [17,18]. Such implementations are possible since the RFID chips are provided with an extended memory for measured samples and external wired interfaces for data exchange with other microcontroller systems.…”

Sensor-Based Weightlifting Workout Assisting System Design and Its Practical Implementation

“…Such an external communication means (108) can include, e.g., Bluetooth LE or Wi-Fi. A radiofrequency identification system, i.e., the RFID system proposed in [15], may be utilized in order to identify particular users operating the system. Such a user can be identified by the system by means of a smartphone device equipped with the RFID function or by means of a suitable piece of workout clothing, such as a glove, also equipped with the RFID function.…”

Compact Multi Bit Slotted C-Scatterer for Threshold Sensitive Chipless Wireless Temperature Sensor

“…The main drawback of all these chipless sensor approaches is the use of ultra-wideband (UWB) signals. This not only complicates the chipless reader architecture [11], but also requires specific protocols and associated bandwidths that are nonstandard in the RFID field, strongly limit their commercial implementations. This work introduces a compact C-scatterer as a threshold temperature sensor with sufficient data capacity in Industrial, Scientific and Medical (ISM) frequency bands that is compliant with RF regulation.…”