NSI-MI Store is live!
You asked and we listened! We are thrilled to launch NSI-MI Store, our online shop where NSI-MI’s most common antennas and accessories are now just clicks away. You can access our Store site here or look for the shopping cart at www.nsi-mi.com. Visit NSI-MI Store today for this easy, fast, and hassle-free shopping experience.
The store is still growing so stay tuned for more products and international sales coming soon!Shop Now
Virtual Short Course
Our premier staff of technical experts will cover a wide range of introductory and advanced topics related to antenna measurements, near-field theory, and compact ranges through pre-recorded lectures that you can access anytime between September 13–October 8. Register for the full course or choose the bundle that is right for you. A live Q&A scheduled September 27–30 will give you a chance to discuss and ask questions to the instructors.
AMETEK acquires NSI-MI Technologies
AMETEK strengthens their test and measurement platform by acquiring NSI-MI.Read Announcement
Virtual Short Course
Our premier staff of technical experts will cover a wide range of introductory and advanced topics related to antenna measurements, near-field theory, and compact ranges through pre-recorded lectures that you can access anytime between March 22 – April 9. Register for the full course or choose the bundle that is right for you. A live Q&A scheduled April 5 – 7 will give you a chance to discuss and ask questions to the instructors.
Theory and Practice of Modern Antenna Range Measurements, 2nd Expanded Edition
Authors: Clive Parini, Stuart Gregson, John McCormick, Daniël Janse van Rensburg, Thomas Eibert
We are thrilled to announce the publication of Daniël Janse van Rensburg's second expanded edition of his book, "Theory and Practice of Modern Antenna Range Measurements", Volumes 1 & 2!
This two-volume book provides a comprehensive introduction and explanation of both the theory and practice of all forms of modern antenna measurements, from basic assumptions to detailed application scenarios.Buy Books
Numerical Study of the RCS of Pyramidal Absorber Geometries
Authors: Vince Rodriguez, Zhong Chen
Publication: AMTA 2020
Available on November 2, 2020 at AMTA 2020 Virtual Symposium
Abstract—There have been a number of numerical analyses of RF absorber. These however, tend to focus on the reflectivity of the material not on the radar cross section (RCS) that it presents. Brumley studied the RCS of RF absorbers as a way to estimate the background RCS of anechoic ranges . The study was done empirically, doing measurements of the RF absorber, and looking at the RCS of different pyramids, with and without paint. Brumley presents some potential ways of improving the RCS signature of the range thus reducing the background RCS of the site. In this paper the suggestions presented by Brumley are revisited. Specifically, his recommendation for the so-called twisted pyramid configuration which he was unable to measure due to the lack of absorber for him to use in the test. In addition to the twisted pyramid, Brumley’s approach of inserting smaller pyramids in the valleys of a larger pyramidal arrangement to reduce the edges parallel to the incoming wave are also presented. The numerical studies are done using time domain techniques as well as frequency domain techniques. The results validate the data and the suggestions presented in 
 S. A. Brumley, "Improving the Performance of Anechoic Absorbers," in Proceedings of the 10th Annual meeting and Symposium of teh Antenna Measurement techniques Association (AMTA 1988), Atlanta, GA , Sep 12-16, 1988.