Papers by Andrey S Andrenko
電子情報通信学会技術研究報告. MW, マイクロ波, Dec 15, 2000
In wearable electronics, autonomous sensor can potentially ease the usage of bulky battery and ev... more In wearable electronics, autonomous sensor can potentially ease the usage of bulky battery and eventually lead to a sustainable system. In this paper, polyvinylidene fluoride (PVDF) piezoelectric film-integrated dual-gate thin-film transistor (TFT) is utilized to monitor human vital signs such as heart rate or impulse rate. The voltage generated by the PVDF from the impulse itself drives the TFT that rectifies and converts impulse signal to the weak current signal feeding to the low-noise amplifier. The preliminary results of such device in addition to system design of chip-based sensor-integrated RFID tag are addressed to unveil the promising applications in wearable electronics.
In this work, electromagnetic analysis of a novel photonic bandgap (PBG) substrate microstrip lin... more In this work, electromagnetic analysis of a novel photonic bandgap (PBG) substrate microstrip line circuit is presented and its applications in an integrated antenna amplifier transmitter front end are discussed. The method-of-moments based Sonnet Suite has been used for full-wave 3D electromagnetic simulation of the microstrip on a high-density substrate having rectangular air blocks. It is shown that a single
URSI Radio Science Letters, 2023
This article presents a new measurement method of evaluating the specific absorption rate (SAR) a... more This article presents a new measurement method of evaluating the specific absorption rate (SAR) as part of human exposure assessment procedure for the radio-frequency wireless power transfer (RF WPT) system operating at 2.45 GHz. SAR distributions measured according to International Electrotechnical Commission standards were obtained and analyzed for the different locations of charging device with the respect to the flat elliptical phantom. RF exposure from the system under test was assessed by comparing the recorded peak 10 g average SAR values versus the ICNIRP general public restriction.
URSI Radio Science Letters, 2022
This article presents a new measurement method of evaluating the specific absorption rate (SAR) a... more This article presents a new measurement method of evaluating the specific absorption rate (SAR) as part of human exposure assessment procedure for the radio-frequency wireless power transfer (RF WPT) system operating at 2.45 GHz. SAR distributions measured according to International Electrotechnical Commission standards were obtained and analyzed for the different locations of charging device with the respect to the flat elliptical phantom. RF exposure from the system under test was assessed by comparing the recorded peak 10 g average SAR values versus the ICNIRP general public restriction.
IEICE Technical Report; IEICE Tech. Rep., Nov 20, 2020
IEICE Technical Report; IEICE Tech. Rep., Feb 25, 2021
Antennas and Wireless Propagation Letters, 2006
... Andrey S. Andrenko, Senior Member, IEEE, Igor V. Ivanchenko, Senior Member, IEEE, Denis I. Iv... more ... Andrey S. Andrenko, Senior Member, IEEE, Igor V. Ivanchenko, Senior Member, IEEE, Denis I. Ivanchenko, Sergey Y. Karelin, Alexey M. Korolev, Evgeniy P. Laz'ko, and Nina A. Popenko, Senior Member, IEEE ... [9] I. Ivanchenko, A. Korolev, N. Lukyanova (Bliznyuk), and N ...
This paper presents the design of small ceramic antenna optimized for mobile handset applications... more This paper presents the design of small ceramic antenna optimized for mobile handset applications. The monopole-type antenna is directly integrated with a simple matching circuit minimizing the total antenna losses. The proposed antenna demonstrates high total and radiation efficiencies and can be utilized in a variety of singleand multi-element antenna system designs for mobile handsets and wireless terminals.
IEICE Proceeding Series
A high-gain and high-efficiency microstrip antenna is proposed and developed for microwave power ... more A high-gain and high-efficiency microstrip antenna is proposed and developed for microwave power transmission. Air substrate design is utilized to maximize the total efficiency of the circular patch operating in the fundamental TM110 mode. Low-cost PCBs have been used to form the ground plane and patch element. The measured −10 dB return loss bandwidth is 350 MHz (5.67–6.02 GHz). Maximum measured antenna gain is 8.4 dB while the measured total efficiency is 96.4% at the operating frequency of 5.8 GHz. Measurement data shows good agreement with the simulation results. The proposed antenna is being used in the microwave power transmission system with both transmitter and receiver RF circuits.
Proceedings of the 2017 ACM International Joint Conference on Pervasive and Ubiquitous Computing and Proceedings of the 2017 ACM International Symposium on Wearable Computers, 2017
This demo presents the newly developed Human Body Communication (HBC) technology utilizing the NF... more This demo presents the newly developed Human Body Communication (HBC) technology utilizing the NFC contactless communication and electric field coupling. The main advantage of this novel technology is its ability to provide more human-centric operation as compared to a conventional NFC communication. In our demonstrations, two applications are introduced. The first one is the illustration of user authentication being realized by shaking hands with a doll. The electric field type NFC by electric induction coupling is utilized. The second application demonstrates an Apple Pay on HBC and two scenarios of "contact" communication with a finger to NFC reader and NFC transaction with a touch panel display are introduced. On outline of the structure of the demo system is also presented to explain the operational principle of the HBC.
Proceedings of 2019 IEEE International Conference on RFID Technology and Applications (RFID-TA), Sep 10, 2019
This paper presents the results of measurements of the Specific Absorption Rate (SAR) distributio... more This paper presents the results of measurements of the Specific Absorption Rate (SAR) distribution produced by the UHF RFID reader antenna located close to the standard flat phantom. SAR measurements have been carried out by the SPEAG DASY5 system at 918 MHz for the varying distance between the antenna and the phantom. RHCP antenna with 8.5dBic gain connected to the commercial UHF RFID reader operating at Pout=30dBm has been used to irradiate the phantom. Safety levels of 10-g averaged SAR not exceeding the 2W/kg limit have been confirmed by the series of measurements. However, it has been found that the maximum values of SAR distribution inside the phantom are localized in front of the antenna. The results obtained can be used as a benchmark data for the applications of wearable, biomedical and implantable UHF RFID systems.
An ultra-high frequency (UHF) passive radio frequency identification (RFID) tag consisting of fle... more An ultra-high frequency (UHF) passive radio frequency identification (RFID) tag consisting of flexible antenna and built-in temperature sensor chip is utilized for temperature monitoring of human body. A series of experiments were performed to study the body effects on temperature measurements. The tags were mounted at different positions of the body and in the different tag orientations as well. The experimental study of sensor integrated RFID tag shows that performance of the tag is more stable, yielding good signal strength and more consistent temperature measurement given the small form factor and arm attachment. Minimizing the deteriorating effect of human body on tag’s performance and the accuracy of measurements in different scenarios gives the perspective for implementation in real-time physiological monitoring as per the medical requirements.
IEEE Antennas and Wireless Propagation Letters
This letter proposes a high-efficiency, dual-band slot patch antenna with a wide frequency ratio ... more This letter proposes a high-efficiency, dual-band slot patch antenna with a wide frequency ratio range. An arc-shaped slot is introduced into a circular patch to perturb the surface current distribution. By introducing a novel asymmetric feed configuration to the slot antenna, three perturbed TM11 modes and two perturbed TM 02 modes are available for flexible modes selection. A wide frequency ratio ranging from 1.13 to 2.12 can be achieved by proper modes collocation and size tuning of the slot. To further improve the radiation efficiency, an air substrate is introduced. All selected modes show high radiation efficiencies from 88% to 95% and peak gains from 8.4 to 9.5 dBi in the measurement. Good agreement can be found between the simulated and measured data.
International Journal of Antennas and Propagation
This paper presents a compact dual-band rectenna for GSM900 and GSM1800 energy harvesting. The mo... more This paper presents a compact dual-band rectenna for GSM900 and GSM1800 energy harvesting. The monopole antenna consists of a longer bent Koch fractal element for GSM900 band and a shorter radiation element for GSM1800. The rectifier is composed of a multisection dual-band matching network, two rectifying branches, and filter networks. Measured peak efficiency of the proposed rectenna is 62% at 0.88 GHz 15.9 μW/cm2 and 50% at 1.85 GHz 19.1 μW/cm2, respectively. When the rectenna is 25 m away from a cellular base station, measurement result shows that the harvested power is able to power a batteryless LCD watch and achieve 1.275 V output voltage. The proposed rectenna is compact, efficient, low cost, and easy to fabricate, and it is suitable for RF energy harvesting and various wireless communication scenarios.
Microwave and Optical Technology Letters
This article presents a quasi-Yagi antenna operating with high gain at two frequency bands. Compa... more This article presents a quasi-Yagi antenna operating with high gain at two frequency bands. Compared with a conventional Yagi antenna, the proposed antenna is designed by integrating a pair of printed split-ring resonators (SRRs) into the antenna layout. The SRRs introduce a new resonant frequency band and the antenna gain remains high at both the bands. The simulated and measured results show that the antenna is well matched while the antenna gain is 6 and 5.80 dBi at the GSM1800 and ISM2450 bands, respectively. The proposed antenna is compact and efficient and achieves high gain so that it could be successfully used in various wireless communication and radio frequency energy harvesting applications. K E Y W O R D S dual-band, high gain, quasi-Yagi antenna, RF energy harvesting, split-ring resonators (SRRs) 1 | INTRODUCTION Recently, the quasi-Yagi antennas have drawn much attention due to their good performance, such as end-fire radiation pattern , high gain, low cost, and easy integration with radio frequency (RF) circuitry. A quasi-Yagi antenna usually consists of a feed, a driven element, a reflector, and one or more directors. There are several typical feeding methods, including microstrip lines, 1 coplanar waveguides (CPWs), 2 coplanar striplines, 3 and microstrip-slotline transition. 4 The main radiating element is designed using a dipole or a folded dipole to obtain a wider bandwidth. The directors are integrated as passive radiators which have no transmission line connection. The currents on parasitic elements are induced by the EM fields from the driven element. The directors serve in such a manner so as to affect the phase of the radio waves, concentrating energy in one particular direction. Quasi-Yagi antennas are widely used in the wireless RF applications, such as phase arrays, 5 wireless communication, 6 and power combining. 7 In the aspects of theory, it is well known that the high-gain characteristics of quasi-Yagi antennas can be achieved by proper amplitude and phase condition between the driven element, reflector, and directors. 8 However, the frequency range with high gain, namely bandwidth of a Yagi antenna is relatively narrow, typically only a few percent of the center frequency. Thus, a high-gain performance can be achieved only in the narrow band. To enhance the bandwidth of printed quasi-Yagi antenna, a compact planar quasi-Yagi antenna with size reduction is reported in Reference 9 where the anten-na's bandwidth widens to 8 GHz but only a bit better than 4 dBi of measured gain is obtained. In Reference 10, a planar quasi-Yagi antenna with dual-band performance is proposed, but the gain is relatively low over the operating bands. A quasi-Yagi antenna with two frequency-dependent radiation patterns is reported in Reference 11. Opposite radiation patterns at the two bands are obtained by using split-ring resona-tors (SRRs). Reference 12 proposes a compact and wideband quasi-Yagi antenna, but the gain of the antenna just varies between 3 and 5.5 dBi. Many dual-band or broadband quasi-Yagi antennas have been proposed in recent years, but very few works report a high gain at both the frequency bands. In this article, a dual-band quasi-Yagi antenna with high gain at the dual design bands is presented. By combining the SRRs with quasi-Yagi antenna structure, a new resonant frequency with high-gain property is obtained as compared with a conventional quasi-Yagi antenna. The proposed antenna operates at the DCS1800 and ISM2450 bands and achieves a gain larger than 5 dBi over the design bands.
Microwave and Optical Technology Letters
This paper presents the design of a novel differential voltage octuple rectifier for wireless RF ... more This paper presents the design of a novel differential voltage octuple rectifier for wireless RF energy harvesting. Two rectifiers with common matching (CM) and two-branch matching (TBM) are presented for the CDMA850/GSM900 bands operation. Measured maximum efficiencies of CM and TBM rectifiers reach 66.5% and 70.6%, respectively. The results also show that both matching network-type rectifiers can produce higher output voltage. It is demonstrated that the designed rectifier-antenna structure powers up a battery-less LCD sensor by harvesting RF signal of a dialing cell phone. The proposed rectifier topology and matching mechanisms can be used for various energy harvesting applications , especially for those requiring high supply voltage.
IEEE Antennas and Wireless Propagation Letters
This letter presents a compact fractal loop rectenna for RF energy harvesting at GSM1800 bands. F... more This letter presents a compact fractal loop rectenna for RF energy harvesting at GSM1800 bands. First, a fractal loop antenna with novel in-loop ground-plane impedance matching is proposed for the rectenna design. Also, a high-efficiency rectifier is designed in the loop antenna to form a compact rectenna. Measured results show that an efficiency of 61% and an output dc voltage of 1.8 V have been achieved over 12-kΩ resistor for 10 μW/cm2 power density at 1.8 GHz. The rectenna is able to power up a battery-less LCD watch at a distance of 10 m from the cell tower. The proposed rectenna is compact, easy to fabricate, and useful for various energy harvesting applications.
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Papers by Andrey S Andrenko