Tom Callahan

Tom
Callahan
General Manager and CTO ,
QRC Technologies

Tom Callahan is the General Manager and CTO of QRC Technologies, a provider of network-discovery cellular test and measurement tools for military and government use. Prior to establishing QRC Technologies, Callahan was Vice President of Engineering for PCTEL’s RF Solutions group, which focused on building cellular scanning receivers. He previously worked as a DSP Engineer building signal-intercept systems for Watkins–Johnson. Callahan has a BSEE and MBA. He is an expert in the air interfaces for cellular protocols and has worked in numerous roles including as a DSP, software, and systems engineer. Callahan also is a Certified Program Management Professional (PMP).

Articles
The Network of Tomorrow Takes Shape
In this follow-on to the article, “Cellular Networks Get Primed for Tomorrow,” the author provides insight into the technical and business issues that will shape near-future networks.
Cellular Networks Get Primed For Tomorrow
As the cellular industry transitions from providing basic voice service and text messages to supporting high-data-rate digital services, the migration toward newer cellular protocols continues to accelerate.
Whitepapers

How to Do Fixture De-Embedding to Match Signal Integrity Simulations to Measurements​
Sponsored by Keysight Technologies
Download this white paper


Testing S-Parameters on Pulsed Radar Power Amplifier Modules​
Sponsored by Rohde & Schwarz
Download this white paper

 

 

 

Webcasts

Perform Power Supply Frequency Response Analysis using an Oscilloscope
May 19, 2015 @ 1pm EST
Sponsored by Keysight Technologies
Register Now!


PAM-4 Transmitter and Receiver Design Characterization Solutions
May 21, 2015 @ 1pm EST
Sponsored by Keysight Technologies
Register Now!


DisplayPort 1.3 – PHY Layer Test Requirements
May 27, 2015 @ 1pm EST
Sponsored by Keysight Technologies
Register Now!


Extraction, Verification, and Usage of a Short Haul Opto VCSEL Model
May 28, 2015 @ 1pm EST
Sponsored by Keysight Technologies
Register Now!

Connect With Us

Sponsored Introduction Continue on to (or wait seconds) ×