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Related Concept Videos

Full wave rectifier01:22

Full wave rectifier

811
A full-wave rectifier is a device that converts alternating current (AC) to direct current (DC) and is more efficient than its half-wave counterpart. It typically includes a center-tapped transformer, two diodes, and a load resistor. The secondary winding of the transformer is divided to provide two equal voltages of opposite polarities, which is the pivotal element of full-wave rectification.
811
Maximum Power Transfer01:16

Maximum Power Transfer

225
Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
225
Half wave rectifier01:20

Half wave rectifier

806
A half-wave rectifier is a fundamental circuit in electronics, designed to convert alternating current (AC) voltage into a unidirectional voltage. It utilizes the simplest form of diode rectification, where the circuit comprises a single diode in series with a load resistor and an AC power source.
806
Bridge rectifier01:24

Bridge rectifier

442
The bridge rectifier is essential in electronics for efficiently converting alternating current (AC) to direct current (DC). Comprised of four diodes configured in a bridge layout, this rectifier effectively processes both the positive and negative halves of the AC waveform, making it superior to half-wave and full-wave center-tapped rectifiers in terms of voltage regulation and output stability.
Operationally, the bridge rectifier allows current flow through two of its diodes during each...
442
Voltage Doubler Circuit01:23

Voltage Doubler Circuit

466
A voltage doubler circuit integrates two main components: a clamping section and a rectifier section. The clamping section consists of a capacitor (C1) and a diode (D1), whereas the rectifier section is equipped with another diode (D2) and capacitor (C2). This circuit produces an output voltage with twice the amplitude of the sinusoidal input voltage.
466
P-N junction01:11

P-N junction

464
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
464

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Dual-Port Six-Band Rectenna with Enhanced Power Conversion Efficiency at Ultra-Low Input Power.

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Summary
This summary is machine-generated.

A new multi-band rectenna design boosts RF-DC efficiency for wireless power transfer. This novel rectenna achieves high conversion efficiency across six frequency bands, ideal for Internet of Everything devices.

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Area of Science:

  • Electrical Engineering
  • Antenna Theory
  • Wireless Power Transfer

Background:

  • Improving radio frequency to direct current (RF-DC) conversion efficiency is crucial for wireless power transfer.
  • Existing rectenna designs often struggle with multi-band operation and efficiency across diverse frequencies.

Purpose of the Study:

  • To propose a novel topology and design methodology for a multi-band rectenna with enhanced RF-DC efficiency.
  • To enable simultaneous rectification across multiple frequency bands for broader energy harvesting applications.

Main Methods:

  • A dual-port rectenna topology utilizing series and parallel diode configurations for simultaneous rectification.
  • Integration of a low-pass filter and a matching network with filtering capabilities for independent design optimization.
  • Design and fabrication of a rectenna operating at six frequency bands (1.85, 2.25, 2.6, 3.52, 5.01, and 5.89 GHz).

Main Results:

  • High power conversion efficiencies achieved: up to 43.01% at -10 dBm input power across the targeted bands.
  • Significant improvement in conversion efficiency under multi-tone input (-20 dBm): 27.7% for six-tone vs. 5.2% for single-tone.
  • Demonstrated coverage of 4G, 5G, and Wi-Fi/WLAN frequency bands.

Conclusions:

  • The proposed multi-band rectenna design offers a significant advancement in RF-DC efficiency.
  • The design methodology allows for independent optimization of rectenna components, simplifying the design process.
  • The developed rectenna shows strong potential for powering low-power devices in the Internet of Everything ecosystem.