A 4-channel, vector network analyzer microwave imaging prototype based on software defined radio technology
Artikel i vetenskaplig tidskrift, 2019

We have implemented a prototype 4-channel transmission-based, microwave measurement system built on innovative software defined radio (SDR) technology. The system utilizes the B210 USRP SDR developed by Ettus Research that operates over a 70 MHz-6 GHz bandwidth. While B210 units are capable of being synchronized with each other via coherent reference signals, they are somewhat unreliable in this configuration and the manufacturer recommends using N200 or N210 models instead. For our system, N-series SDRs were less suitable because they are not amenable to RF shielding required for the cross-channel isolation necessary for an integrated microwave imaging system. Consequently, we have configured an external reference that overcame these limitations in a compact and robust package. Our design exploits the rapidly evolving technology being developed for the telecommunications environment for test and measurement tasks with the higher performance specifications required in medical microwave imaging applications. In a larger channel configuration, the approach is expected to provide performance comparable to commercial vector network analyzers at a fraction of the cost and in a more compact footprint.

Författare

Paul M Meaney

Thayer School of Engineering at Dartmouth

Chalmers, Elektroteknik, Signalbehandling och medicinsk teknik, Biomedicinsk elektromagnetik

Alexander Hartov

Thayer School of Engineering at Dartmouth

Selaka Bulumulla

GlobalFoundries

Timothy Raynolds

Thayer School of Engineering at Dartmouth

Cynthia Davis

GE Global Research

Florian Schoenberger

Thayer School of Engineering at Dartmouth

Sebastian Richter

Thayer School of Engineering at Dartmouth

Keith D. Paulsen

Thayer School of Engineering at Dartmouth

Review of Scientific Instruments

0034-6748 (ISSN)

Vol. 90 4 044708

Ämneskategorier

Datorteknik

Telekommunikation

Inbäddad systemteknik

DOI

10.1063/1.5083842

Mer information

Senast uppdaterat

2019-07-22