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Related Experiment Video

Updated: Dec 7, 2025

Using Synchrotron Radiation Microtomography to Investigate Multi-scale Three-dimensional Microelectronic Packages

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Low Cost, High Performance, 16-Channel Microwave Measurement System for Tomographic Applications.

Paul Meaney¹, Alexander Hartov¹, Timothy Raynolds¹

¹Thayer School of Engineering, Dartmouth College, Hanover, NH 03755, USA.

Sensors (Basel, Switzerland)

|September 25, 2020

Summary

We created a compact, 16-channel software defined radio system for microwave tomography. This multichannel transceiver minimizes cross-channel leakage for improved breast imaging applications.

Keywords:

breast dynamic range leakage microwave imaging multipath software defined radio

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Area of Science:

Medical Imaging
Microwave Engineering
Radio Frequency Systems

Background:

Multichannel systems are crucial for advanced imaging techniques like microwave tomography.
Existing systems often face challenges with cross-channel leakage, impacting signal integrity.
Compact and efficient transceivers are needed for practical implementation in medical devices.

Purpose of the Study:

To develop a compact, multichannel software defined radio (SDR) based transceiver measurement system.
To address the critical specification of cross-channel leakage in multichannel microwave tomography.
To demonstrate the system's performance and compliance for breast imaging applications.

Main Methods:

Designed a 16-channel transceiver system utilizing software defined radio technology.
Implemented advanced signal isolation techniques at both system and component levels.
Physically separated individual receivers to leverage inherent isolation.

Main Results:

The system operates from 500 MHz to 2.5 GHz, measuring signals down to -140 dBm.
Achieved significant reduction in cross-channel leakage, meeting stringent noise floor requirements.
Demonstrated specification compliance at both component and system levels.

Conclusions:

The developed SDR transceiver system is suitable for general microwave tomographic applications.
The compact design integrates with existing breast imaging systems.
The implemented isolation techniques effectively manage cross-channel leakage for reliable measurements.