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Bridge rectifier

Bridge rectifier

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...

Full wave rectifier

Full wave rectifier

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.

Half wave rectifier

Half wave rectifier

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.

Clipper Circuit

Clipper Circuit

A clipper circuit is a fundamental wave-shaping device that harnesses the unique properties of diodes to alter and control waveform characteristics. This technology is widely used in electronic devices, especially in television and radar communication systems, where it enhances waveform modulation in both transmitters and receivers.
The operation of a clipper circuit can be exemplified by analyzing a dual-clipper configuration setup that integrates two ideal diodes, each paired with a biasing...

Schottky Barrier Diode

Schottky Barrier Diode

Schottky barrier diodes are specialized semiconductor devices characterized by their unique construction. This construction involves combining a metal layer with a moderately doped n-type semiconductor material. This combination leads to the formation of a Schottky barrier, a pivotal element that defines the diode's operational characteristics. The core functionality of Schottky barrier diodes is their capacity to allow current to flow in only one direction due to their distinctive...

Diode: Reverse bias

Diode: Reverse bias

A diode is reverse-biased when the positive terminal of an external voltage source is connected to the n-type material and the negative terminal to the p-type material. This configuration opposes the natural direction of current flow through the diode, effectively increasing the width of the depletion region and the barrier potential. The reverse bias condition produces a minimal leakage current, primarily due to minority charge carriers. This leakage becomes significant when the reverse...

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Related Experiment Video

Updated: Jul 19, 2025

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

Published on: August 27, 2021

A multiband SSr diode RF rectifier with an improved frequency ratio for biomedical wireless applications.

Surajo Muhammad^1,2, Mohamed Ibrahim Waly^3,4, Nasser Ali AlJarallah^5,6

¹Faculty of Engineering, Centre For Wireless Technology (CWT), Multimedia University, Cyberjaya, 63100, Malaysia.

Scientific Reports

|August 15, 2023

Summary

This study presents a simplified four-band implantable RF rectifier capable of harvesting energy from multiple RF signals. The novel design achieves high RF-to-DC power conversion efficiency, demonstrating potential for powering biomedical implantable devices.

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Last Updated: Jul 19, 2025

Construction of a Wireless-Enabled Endoscopically Implantable Sensor for pH Monitoring with Zero-Bias Schottky Diode-based Receiver

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Wideband Optical Detector of Ultrasound for Medical Imaging Applications

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Published on: May 11, 2014

Area of Science:

Electrical Engineering
Biomedical Engineering
Radio Frequency Engineering

Background:

Biomedical implantable devices (BIDs) require efficient power sources.
Existing RF energy harvesting solutions often face limitations in bandwidth and efficiency.
There is a need for compact, multi-band rectifiers for BIDs.

Purpose of the Study:

To develop a simplified, four-band implantable RF rectifier.
To enhance RF energy harvesting capabilities for low-power biomedical applications.
To investigate the performance of a multi-band rectenna for powering BIDs.

Main Methods:

Sequential matching of RF-rectifier cells to four operational frequencies.
Design and fabrication of a compact RF-rectifier on an FR-4 PCB.
Testing of the rectenna's performance at various RF frequencies and power levels.

Main Results:

The RF rectifier operates across multiple bands, including 1.830 GHz, 2.100 GHz, and Wi-Fi bands (2.38–2.68 GHz).
Achieved a maximum RF-to-DC power conversion efficiency (PCE) of 73.00% at 2.100 GHz with 2 dBm input power.
Demonstrated outdoor performance with an output voltage of 0.440 V, capable of driving a low-power evaluation module.

Conclusions:

The proposed four-band RF rectifier offers simplified circuit complexity and effective frequency domain utilization.
The design exhibits potential for powering various low-power biomedical implantable devices through efficient ambient RF energy harvesting.
The multi-band operation and good impedance bandwidth contribute to the rectenna's practical applicability.