Radar Cross Section (RCS) and Stealth
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When: May 9, 2019
14:00 - 15:00 EDT (18:00 - 19:00 UTC)
Where: United States
Presenter: Dr. Clayton Stewart
Contact: Caleb Herr
703 549 1600

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Radar Cross Section (RCS) and Stealth

Thursday, May 9, 2019 14:00 -15:00 EDT



This webinar will begin with a discussion of radar cross section (RCS) which is an important characteristic of military vehicles, such as aircraft, warships, and tanks. The concept of RCS as the effective cross-sectional area of the target as seen by the radar will be discussed. It’s measured in square meters (m2) or decibels above a square meter (dBm2). Alternatively, the RCS of a target can be considered to be the cross section of a metal sphere (in m2) yielding the same return amplitude as the target. We will discuss how the RCS depends on many parameters such as:

Relative size (size vs wavelength),
Target material/painting or coating, and 

The RCS of a warship will vary significantly with the look angle, from as little as 20 dBsm to as much as 60 dBsm broadside. We will also talk about how RCS is also polarization sensitive; for example, aircraft with long wings will have a strong horizontal polarization component while vertically oriented surfaces will contribute to the vertical polarization component.

Next we will discuss how reducing the RCS and general target detectability of military vehicles improves their combat survivability and enhances their general military utility. The presentation will include how stealth indicates reduction in all signatures:

Radar signature reduction techniques

– Hiding the engines
– Avoiding vertical surfaces
– Avoiding internal angles
– Hiding antennas
– Radar absorptive materials (RAM)

Minimize Radio Emissions
Direction Transmission/Reflections

We will also talk about how RCS reduction techniques are less effective against long wavelength radars, ones for which the radar wavelength is comparable to the target size.

The presentation will discuss the basics of RCS technology and the evolution of stealth technology over the past several years.  Examples of modern operational stealthy platforms will be presented.



Dr. Clayton Stewart has over 40 years of experience across the spectrum of research direction, line management, program management, system engineering, engineering education, flight operations, and R&D.  He has had extensive involvement as Technical Director, Principal Investigator, Operation Manager, Director of Research, Program Manager, Associate Professor, Chief Scientist, Member of the Technical Staff, and Aircrew Member.

Previously (2007-2013) he was Technical Director, US Office of Naval Research Global, in London where he directed 50 engineers and scientists deployed globally. Before that (1994-2007) he was Corporate VP/General Manager SAIC, $120M/yr R&D operation; 500 technical and administrative staff. From 1990 to 1994 he was Associate Professor Electrical and Computer Engineering/Associate Director, Center of Excellence in Command, Control, Communications, and Intelligence at George Mason University. From 1987 to 1990 he was at ARCO Power Technologies, Inc., as Program Manager Artificial Ionospheric Mirror OTH Radar Program. He was Member of the Technical Staff: Sperry Corporation, Chief Scientist Signal Processing (1984-1987); Director Tactical Systems USAF Studies & Analyses, Pentagon. (1982-1984); and US Air Force Academy Associate Professor of EE, Director of Research. (1978-1982). He earned his PhDEE (1978) at the Air Force Institute of Technology. Aircrew member (EWO) in USAF 1965-1974.

Dr. Stewart currently works at University College London in the Department of Electronic and Electrical Engineering as a Visiting Professor where he teaches short courses on cyber security, C4ISR, and Electronic Warfare.




*Registration will close one hour prior to the start of the webinar (1pm ET)! Any registrations taken after this time will not be able to view the live webinar.

Registration and attendance at this live event is complimentary for AOC members and non-members alike.  However, you must be signed into your AOC account to register.  If you don't have an AOC account, but would like to register for free, please join here as a "Guest Non-Member."


After you register for the webinar, you will be emailed a confirmation with the link to the webinar, along with instructions on how to connect.

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You can also access the webinar via free mobile apps available on iOS and Android devices.

For questions, please contact Caleb Herr.


PLEASE NOTE:  By registering for this webinar, you are providing explicit consent that the details of your registration may be used by the Association of Old Crows (AOC), the presenter, and/or the sponsor(s) to contact you via email for informational and marketing purposes.


The entire presentation and Q&A will be recorded for viewing approximately 24 hours after the event.  On-demand viewing of recorded webinars is reserved as a benefit for dues-paying AOC members only.  You can join the AOC here.  You can find the link to the recording in our AOC Virtual Series Archive.



With over 13,000 members internationally, the Association of Old Crows is an organization for individuals who have common interests in Electronic Warfare (EW), Electromagnetic Spectrum Management Operations, Cyber Electromagnetic Activities (CEMA), Information Operations (IO), and other information related capabilities. The Association of Old Crows provides a means of connecting members and organizations nationally and internationally across government, defense, industry, and academia to promote the exchange of ideas and information, and provides a platform to recognize advances and contributions in these fields.
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