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Updated: Aug 19, 2025

Real-Time DC-dynamic Biasing Method for Switching Time Improvement in Severely Underdamped Fringing-field Electrostatic MEMS Actuators

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A Wideband and Low-Power Distributed Cascode Mixer Using Inductive Feedback.

¹Department of Electronics Engineering, Pai Chai University, Daejeon 35345, Republic of Korea.

Sensors (Basel, Switzerland)

|November 26, 2022

Summary

A novel wideband, low-power distributed cascode mixer achieves high conversion gain for mobile communications. This compact complementary metal-oxide-semiconductor (CMOS) mixer supports ultra-wideband and 5G/WiGig frequencies.

Keywords:

CMOS cascode mixer distributed gate positive feedback low power wideband

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Area of Science:

Electrical Engineering
Microwave Engineering
Integrated Circuit Design

Background:

Future mobile communications require mixers that operate across a wide frequency spectrum with minimal power consumption.
Existing mixer designs often face trade-offs between bandwidth, gain, and power efficiency.

Purpose of the Study:

To develop and characterize a wideband, low-power distributed cascode mixer for next-generation mobile communication systems.
To achieve high conversion gain and excellent radio frequency (RF) and local oscillator (LO) isolation in a compact form factor.

Main Methods:

Implementation of a distributed cascode mixer architecture inspired by distributed amplifiers (DAs).
Incorporation of inductive positive feedback for enhanced conversion gain and reduced power consumption.
Fabrication using a 130 nm commercial complementary metal-oxide-semiconductor (CMOS) process.

Main Results:

The mixer demonstrates conversion gain from -2.9 to 3.1 dB across 4-30 GHz and -1.9 to 0.4 dB across 54-66 GHz.
Achieved excellent LO-RF isolation exceeding 15 dB over the entire 0.2-67 GHz measurement band.
Exhibits ultra-low power consumption (within 12 mW) and a compact chip size (0.056 mm²).

Conclusions:

The proposed distributed cascode mixer effectively integrates wideband operation, high conversion gain, and low power consumption.
This design is suitable for emerging applications including ultra-wideband (UWB), 5G, and Wireless Gigabit (WiGig) communications.
The compact size and performance metrics make it a viable solution for mobile communication devices.