astronomy

Raymond Luebbers

Raymond Luebbers is a astronomy topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Raymond Luebbers rather than just read about it. In short: Dr. Raymond J.

Key takeaways

Raymond Luebbers belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Raymond Luebbers to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Raymond Luebbers from memory before moving on to harder problems.

Reference excerpt

Dr. Raymond J. Luebbers (born 2 September 1946) was Professor of Electrical Engineering at The Pennsylvania State University and Ohio University, a Research Scientist at the Lockheed Martin Research Laboratory in Palo Alto, CA and founder of Remcom, Inc.

Education and academic career

Luebbers received the B.S.E.E. from the University of Cincinnati with High Honors, and M.S.E.E. and Ph.D. in Electrical Engineering from Ohio State University, 1975. In 1984, he joined the Electrical Engineering Department of The Pennsylvania State University. During the 1991-1992 academic year he was a National Science Foundation Visiting Professor in the Faculty of Engineering, Tohoku University, Sendai, Japan.

Remcom While a professor at Penn State he founded Remcom, Inc, a company which develops of commercial electromagnetic analysis software. In December 2001 he resigned from Penn State, retaining the title of Adjunct Professor. Remcom also performs research and development under contract to government and industry. It has won awards for innovation. Remcom was one of only five companies to receive a 2001 US Army Small Business Innovative Research Quality Award. Luebbers retired from Remcom, Inc. in July 2008 but still consults with the company regularly.

Research and writing Luebbers has published in the areas of analysis of frequency selective surfaces, applications of the Geometrical Theory of Diffraction, and applications and extensions of the Finite-difference time-domain method. He is co-author of a book called The Finite Difference Time Domain Method for Electromagnetics. He has made invited presentations and presented short courses at several international meetings. The paper "FDTD Calculation of Scattering from Frequency-Dependent Materials," by R. Luebbers, D. Steich, and K. Kunz, received the 1993 Schelkunoff Best Paper Award of the IEEE Antennas and Propagation Society. He has served on the Board of Directors and as Vice-President of the Applied Computational Electromagnetics Society (ACES). He is a Member of International Union of Radio Science (URSI) Commission B, and is a member of IEEE Standards Coordinating Committee 34 on Electromagnetic Energy Product Performance Safety.

Awards Elected Fellow of the Institute of Electrical and Electronics Engineers The paper "FDTD Calculation of Scattering from Frequency-Dependent Materials," by R. Luebbers, D. Steich, and K. Kunz (September 1993 issue of AP-S Transactions) received the Schelkunoff Best Paper Award of the IEEE Antennas and Propagation Society.

Select publications R. Luebbers, A. Smith, S.A. Fast, J.W. Schuster, “A Demonstration of Utilizing High Fidelity Propagation Models for Emitter Localization in Urban Environments,” International Union of Radio Science (URSI), Boulder, CO, January 5–8, 2004. R. Luebbers, “Using FDTD To Illustrate the Behavior of Double Negative Materials,” 2003 IEEE International Antennas and Propagation Symposium and USNC/CNC/URS North American Radio Science Meeting, pp. 30, June 2003. C. Penney, R. Luebbers, and J. Schuster. "Scattering from Coated Targets Using a Frequency-Dependent, Surface Impedance Boundary Condition," IEEE Transactions on Antennas and Propagation, vol 44, no 4, pp 434–443, April 1996 R. Luebbers, "Comparison of Lossy Wedge Diffraction Coefficients with Application to Mixed Path Propagation Loss Prediction", IEEE Transactions on Antennas and Propagation, vol 36, no 7, pp 1031–1034, July 1988. R. Luebbers, "Propagation Prediction for Hilly Terrain Using GTD Wedge Diffraction", IEEE Transactions on Antennas and Propagation, vol 32, no 9, pp. 951–955, September 1984. R. Luebbers, "Finite Conductivity Uniform GTD Versus Knife Edge Diffraction in Prediction of Propagation Path Loss", IEEE Transactions on Antennas and Propagation, vol 32, no 1, pp. 70–76, January 1984.

University level textbook Karl S. Kunz and Raymond J. Luebbers (1993). The Finite Difference Time Domain Method for Electromagnetics. CRC Press. ISBN 978-0-8493-8657-2. Archived from the original on 2007-12-10.

See also List of textbooks in electromagnetism

References

Worked examples

Example 1 — a first encounter with Raymond Luebbers

Start with the simplest possible case. Write down what Raymond Luebbers claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Raymond Luebbers before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Raymond Luebbers ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Raymond Luebbers

In research: Raymond Luebbers appears in astronomy research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Raymond Luebbers in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Raymond Luebbers is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1946 births, American microwave engineers, American scientists, so understanding it makes those chapters shorter.
In everyday life: Look for Raymond Luebbers outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Raymond Luebbers in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Raymond Luebbers means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Raymond Luebbers out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Raymond Luebbers in simple terms?

Dr. Raymond J.

Why does Raymond Luebbers matter?

Because it connects several astronomy ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Raymond Luebbers?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Raymond Luebbers.