Compact high efficiency circularly polarized rectenna based on artificial magnetic conductor

2019 ◽  
Vol 11 (9) ◽  
pp. 975-982
Author(s):  
Lin Li ◽  
Xue-Xia Yang ◽  
Geliang Zhu ◽  
Qi Luo ◽  
Steven Gao
Keyword(s):  
Conversion Efficiency ◽  
High Efficiency ◽  
Harmonic Suppression ◽  
Magnetic Conductor ◽  
Compact Structure ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Circularly Polarized ◽  
Artificial Magnetic Conductor ◽  
Transmitting Antenna

AbstractA compact circularly polarized (CP) rectenna with low profile and high efficiency based on the artificial magnetic conductor (AMC) is proposed in this paper. The receiving CP antenna is a coplanar stripline fed dual rhombic loop with an AMC reflector. The proposed AMC reflector not only improves the antenna gain to 9.8 dBi but also decreases the profile to 0.1 λ0. The AMC reflector also makes the antenna have a harmonic suppression function so the low pass filter between the rectifying circuit and the antenna could be omitted and the rectenna has a compact structure. According to the measured results, the rectenna has the highest conversion efficiency of 76% on the load of 240 Ω with the received power of 117.5 mW. When the linearly polarized transmitting antenna is rotated, the conversion efficiency of the CP rectenna maintains a constant high conversion efficiency of 74%. The compact structure and CP operation of the rectenna made it a good candidate of the wireless battery for some electronic devices and far-distance microwave power transmission.

Ultra‐wideband circularly polarized crossed‐dual‐arm bowtie dipole antenna backed by an artificial magnetic conductor

2019 ◽  
Vol 61 (12) ◽  
pp. 2801-2810
Author(s):  
Mohamed Elsaid ◽  
Korany R. Mahmoud ◽  
Mohamed Hussein ◽  
Mohamed F. O. Hameed ◽  
Ashraf Yahia ◽  
...  
Keyword(s):  
Dipole Antenna ◽  
Ultra Wideband ◽  
Magnetic Conductor ◽  
Circularly Polarized ◽  
Artificial Magnetic Conductor ◽  
Dual Arm

The Analysis and Design of Three-Phase Static Inverter Deadband Effect and Harmonic Suppression

2013 ◽  
Vol 575-576 ◽  
pp. 293-296
Author(s):  
Qun Min Yan
Keyword(s):  
Control Method ◽  
Design Method ◽  
Harmonic Suppression ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Analysis And Design ◽  
Three Phase ◽  
Low Pass ◽  
Harmonic Components ◽  
Simulated Analysis

in order to solve the problem of three-phase static inverter output waveform distortion, detailed analyzed of the voltage distortion caused by the deadband effect and the resulting harmonic components. The control method is proposed to set the deadband time combining with the voltage compensation, while in order to improve the inverter output, the converter output to design a trap filter and a low pass filter cascaded filtering circuit. Simulated analysis the entire system though Saber, using the digital chip TMS320F2812 to achieve appropriate compensation strategies, simulation results and experimental results have all proved the effectiveness of the design method.

Study and Design of New Rectenna Structures for Wireless Power Transmission Applications

2020 ◽  
pp. 123-155
Author(s):  
Abdellah Taybi ◽  
Abdelali Tajmouati ◽  
Jamal Zbitou ◽  
Mohamed Latrach
Keyword(s):  
Conversion Efficiency ◽  
Power Supply ◽  
Power Transmission ◽  
Dual Band ◽  
Design System ◽  
Wireless Power ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Remote Sensors ◽  
Low Pass

This chapter presents many research works that have been carried out to deal with the problem of power supply to remote sensors. A 2.45 GHz voltage multiplier rectifier was validated to deliver 18V of output voltage with a conversion efficiency of 69%. Another rectenna was fabricated at 5.8 GHz of the Industrial Scientific Medical band and reach a measured voltage of 7.4V at 18 dBm. The third structure is about a series rectifier working at 2.45 GHz associated with a microstrip low pass filter which produces a supplying voltage of 11.23V. Added to the aforementioned results, the objective in this work is to design, optimize and realize two structures: A dual band patch antenna working at 2.45 GHz and 5.8 GHz, and a compact rectifier circuit at 2.45 GHz for the power supply of low-consumption devices. This rectifier has been designed using Advanced Design System. The bridge topology was employed on an FR4 substrate. A good matching input impedance was observed and high conversion efficiency was obtained. Simulation results have been validated through realization and measurements.

A microstrip planar lowpass filter with ultra-wide stopband using hexagonal-shaped resonators

Frequenz ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Shu Jiang ◽  
Wenbo Wang ◽  
Le Ren
Keyword(s):  
Transmission Line ◽  
Harmonic Suppression ◽  
Lowpass Filter ◽  
Functional Area ◽  
Pass Filter ◽  
Low Pass Filter ◽  
High Impedance ◽  
Low Pass ◽  
Multiple Transmission

Abstract A microstrip planar lowpass filter with ultra-wide stopband up to 40 GHz is presented. The filter is designed based on four types of hexagonal-shaped resonators, producing multiple transmission zeroes and extending the stopband. The high-impedance transmission line is folded to make the circuit more compact and form the coupling gaps between the adjacent resonators. A pair of folded open stubs are added to enhance the cut-off rate. As a result, an ultra-wide stopband with 23rd-harmonic suppression has been attained. A demonstration filter has been designed and fabricated with 3 dB cut-off frequency of 1.70 GHz. The measured results show that the relative stop bandwidth of the low-pass filter (LPF) is 182% with suppression level of 25 dB, covering 1.85–40 GHz. The functional area size of the filter is 21.50 × 21.70 mm, which corresponds to 0.198λ g  × 0.200λ g (λ g is the guided wavelength at 3 dB cut-off frequency).

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