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Single-chip fully integrated direct-modulation CMOS RF transmitters for short-range wireless applications.

Munir M El-Desouki¹, Syed Manzoor Qasim, Mohammed BenSaleh

¹King Abdulaziz City for Science and Technology (KACST), Riyadh 11442, Saudi Arabia. mdesouki@kacst.edu.sa

Sensors (Basel, Switzerland)

|August 7, 2013

Summary

This study presents efficient, single-chip radio frequency (RF) transmitters for wireless sensor networks (WSNs). The developed RF transmitters demonstrate improved performance for low-power applications.

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Area of Science:

Electrical Engineering
Integrated Circuits
Wireless Communication

Background:

Ultra-low power radio frequency (RF) transceivers are crucial for wireless sensor networks (WSNs).
Existing WSN applications demand efficient, reliable, and fully integrated transmitter architectures with minimal components.

Purpose of the Study:

To design, implement, and evaluate single-chip, fully integrated RF transmitters operating at 2.4 GHz and 433 MHz.
To investigate the performance of direct-modulation power voltage-controlled oscillators (PVCOs) and a phase-locked loop (PLL) based transmitter for WSNs.

Main Methods:

Fabrication of three RF transmitters (2.4 GHz, 433 MHz, and 2.0 GHz PLL) using standard mixed-signal CMOS 0.18 µm technology.
Performance evaluation through measurements of drain efficiency, output power, phase noise, current consumption, and locking range.

Main Results:

The 2.4 GHz transmitter achieved an improved drain efficiency from 27% to 36%.
Both 2.4 GHz and 433 MHz transmitters delivered significant output power with low phase noise at low current draws.
The PLL transmitter demonstrated a notable locking range while consuming minimal power.

Conclusions:

The designed RF transmitters are suitable for efficient use in low-power wireless sensor network applications.
The single-chip integration and performance metrics highlight the potential for WSN advancements.