• Title/Summary/Keyword: 렉테나

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Cavity-Backed Slot Antenna for Microwave Power Reception (무선 전력 수전용 공동 안테나)

  • 권익승;김기채
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2000.05a
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    • pp.105-108
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    • 2000
  • The fundamental characteristics of the cavity-backed slot antenna at 2.45 GHz are analyzed with the method of moment for the use of a part of rectenna element. The proposed antenna has a rectangular-narrow slot on the upper surface and a feed post and a parasitic post inside of the cavity. The interior posts are perpendicular to the slot surface in order that the microwave circuits can be attached to the bottom of the cavity. Theoretical results shows that the maximum return loss of 50 dB at the input terminal of the antenna is achieved.

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Technique of wireless power transmission using microwave (마이크로규론 이용한 무선전력전송 기술)

  • Yang, Sang-Yeol;Kim, Jae-Hwan;Song, Kyo-D.
    • Proceedings of the KIEE Conference
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    • 2006.10a
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    • pp.131-132
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    • 2006
  • 무선전력송신은 로봇, 우주 항공, 정보통신, MEMS 등 디바이스 경량화 및 운동성 향상 등의 요소가 중요하게 작용하는 분야에 도움을 줄 수 있다. 특히 정찰 및 탐사에 쓰일 초경량의 로봇을 위해서는 무선전력송신 기술은 상당히 중요한 개념이 된다. 본 논문에서는 유연 박막 기판과 다이폴 안테나, 그리고 쇼트키다이오드를 이용하여 전송된 마이크로파를 직류전력으로 변환시키는 렉테나(rectenna)에 대해서 소개하고 제조방과 성능평가를 통하여서 응용 개발의 가능성에 대해서 논한다.

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Low Power RF Energy Harvesting from the UHF RFID System (UHF RFID 시스템으로부터의 저전력 RF 에너지 하베스팅)

  • Park, Jeong-Heum
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.23 no.1
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    • pp.182-187
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    • 2009
  • In this paper, the power management module of wireless sensor node is designed and fabricated utilizing RF energy from reader antenna of commercial RFID system, which is mainly categorized in the energy harvesting. For this, the rectenna and the high efficient boost converter is designed to get the DC power from RF power for the charging the battery. When the RF power from RFID reader antenna is 1.2[W], the DC power of 3.1[mW] at the distance of 1[m] and 1[mW] at 5.5[m] are obtained. Considering the connection to the battery, the boost converter for enhancing the conversion efficiency is designed. The conversion efficiency at the distance of 4[m] is 79.3[%] and the harvested power is 1.36[mW] which is actually used for the charging the battery. This value is available in the wireless sensor networking.

High Efficiency Rectenna for Wireless Power Transmission Using Harmonic Suppressed Dual-mode Band-pass Filter (고조파 억압 이중모드 대역통과 여파기를 이용한 2.45 GHz 고효율 렉테나 설계)

  • Hong, Tae-Ui;Jeon, Bong-Wook;Lee, Hyun-Wook;Yun, Tae-Soon;Kang, Yong-Cheol;Lee, Jong-Chul
    • The Journal of The Korea Institute of Intelligent Transport Systems
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    • v.8 no.6
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    • pp.64-72
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    • 2009
  • In this paper, a high efficiency 2.45 GHz rectenna with a microstrip patch antenna and a dual-mode band-pass filter in which the 2nd and 3rd harmonics are suppressed, is presented. From the experimental results, the 2.45GHz rectenna using 3rd harmonic suppressed dual-mode BPF shows the conversion efficiency of 41.6% with incident power density of 0.3 mW/cm2 and the received power of 1.66 mW. This result shows high conversion efficiency because the received power of this rectenna is lower than other rectennas to be compared with. This rectenna can be applied to the WPT (Wireless Power Transmission) field for energy harvesting. Also, it is expected to be used to provide the stand-by power for the low power devices for USN, and wireless power transfer in sensor application of MEMS devices.

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A Study on the Characteristics of a Rectifying Circuit for Wireless Power Transmission using a Passive RAID System (수동형 RFID 시스템을 이용한 무선 전력 전송을 위한 정류회로 특성 연구)

  • Park, Cheol-Young;Yeo, Jun-Ho
    • Journal of Korea Society of Industrial Information Systems
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    • v.16 no.4
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    • pp.1-7
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    • 2011
  • In this paper, we design rectifing circuits at 910MHz, which is used for passive RFID system, for wireless power transmission system by using two types of schottkey diodes HSMS_2822 and HSMS 2852, and the RF-DC conversion efficiencies for the curcuits are compared and analyzed in terms of input power and load resistance. When the input power is -20 to 17dBm, the conversion efficiency for HSMS_2852 is larger than in case of HSMS_2822. The output voltage and current at the load of the fabricated rectifying circuit are measured through a dipole antenna when input power is transmitted by a RFID reader and the diatance varies. The measured ouput volatge and current for the distance of 50cm are 2.5V and 5.75mA.

Harmonic Suppression Compact Microstrip Patch Antenna for IoT Sensor (고조파 억제를 위한 IoT 센서용 소형 마이크로스트립 패치 안테나)

  • Lee, Hyun-Seung;Lim, Jeong-Taek;Jung, Bang-Chul;Kim, Choul-Young
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.18 no.6
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    • pp.85-89
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    • 2017
  • This paper proposes an antenna incorporating a bandstop filter to miniaturize the rectenna used for wireless power transmission with the emerging interest these days. To suppress the harmonics that can be re-radiated, this paper proposes a microstrip patch antenna that can suppress the harmonics while maintaining the size of the antenna by inserting a U-slot, which acts as a bandstop filter, on the ground plane of the antenna. As a result, S11 of the second harmonic(4.6GHz) was reduced from -5.61dB to -0.338dB and the efficiency was suppressed significantly from 29.76% to 1.5%. In addition, the maximum gain was reduced to -12dBi from 2.89dBi. On the other hand, at the fundamental frequency (2.45GHz), the S11 value was reduced from -18 dB to -15 dB, and the efficiency was reduced slightly from 68.2% to 60%. In the case of applying a microstrip antenna combined with the proposed bandstop filter to a rectenna, it is believed that the harmonics that degrade the performance of the rectenna can be removed effectively while reducing the large area occupied by harmonic suppression.

Efficient DC Power Management Scheme using 60-GHz Rectenna (60-GHz 렉테나를 이용한 효율적 DC 전력 관리 체계)

  • Lim, Sung-Joon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.57 no.6
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    • pp.1032-1035
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    • 2008
  • In this paper, a DC power management scheme is proposed for efficient battery operation of 60-GHz receivers. It consists of a rectenna and a zero-cross detector. The harmonic rejection capability of a circular sector antenna is used to simplify the rectenna. The zero-cross detector is introduced to increase sensitivity. When the received power density is larger than 0.013 $mW/cm^2$, it can generate enough DC power to activate an RF receiver. Experimental data is used to verify the proposed idea.

Design of a Rectenna Using Dual Band/Dual Polarization Microstrip Patch Antenna (이중대역/이중편파 패치 안테나를 이용한 렉테나 설계)

  • Seo, Ki-Won;Kim, Jung-Han;Roh, Hyoung-Hwan;Seong, Yeong-Rak;Oh, Ha-Ryoung;Park, Jun-Seok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.12
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    • pp.2268-2272
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    • 2010
  • This letter presents that a rectenna can utilize more stable wireless power by using a new design dual band/dual polarization microstrip patch antenna and 2 stage voltage multiplier at 2.4 GHz band and 3.1 GHz band. The proposed antenna is a new microstrip patch antenna design to make impedance matching possible by using slotted capacitive coupling between the patch and $50\Omega$ feed line on a ground plane. Its advantage is that the size of the rectenna can be reduced by using $50\Omega$ feed line on the ground plane, which can be used efficiently. The dual band/dual polarization microstrip patch antenna shows circular polarization at 2.4 GHz band and linear polarization at 3.1 GHz band. Under -10 dB return loss, The dual band/dual polarization microstrip patch antenna obtains 340 MHz bandwidth as 2.23~2.57 GHz and 375 MHz bandwidth as 2.95~3.325 GHz. Also, 2 Stage Voltage multiplier is possible to operate at 2.4 GHz band and 3.1 GHz band. The designed retenna can usually obtain wireless power at both 3.1 GHz band, and 2.4 GHz band applications such as Wi-Fi, Bluetooth, Wireless LAN, etc. So more stable wireless power can be utilized at the same time.

Effective Design of the Broadband Horn Antenna Using Multi-mode Network Analysis (다중모드 회로망 분석을 이용한 광대역 혼 안테나의 효율적인 설계)

  • Moon, Jung-Ick;Cho, In-Gui;Kim, Sung-Min
    • Journal of IKEEE
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    • v.16 no.4
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    • pp.297-303
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    • 2012
  • This paper proposes the effective design procedure for a broadband, double-ridged horn antenna for evaluating the performance of the RF energy harvesting system with a multi-band rectenna. Using multi-mode network analysis, the higher-mode scattering parameters of the transition and horn were acquired and applied to the antenna design, respectively. As a result, the computing time could be reduced and the calculated VSWR(voltage standing wave ratio) of the antenna was very similar to the analyzed result using fully electromagnetic simulation. And there was also good agreement between the simulated and measured results. The designed broadband antenna has a bandwidth of 660~6360 MHz and 6~13.7 dBi peak radiation gain.