Chapter 9 ANTENNA RANGE MEASUREMENTS Paul Wade N1BWT © 1994,1998 Hams have been measuring antennas for many years at VHF and UHF frequencies, and have seen marked improvement in antenna designs and performance as a res

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6.1.5 Dish Patterns with Axial Displacement Error When I first talked about axial displacement error, one of the first questions that arose was “Where does the power go when the gain is reduced?” The best way to answ

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Chapter 6 Feeds for Parabolic Dish Antennas Paul Wade W1GHZ ©1998,1999 Appendix 6A — Parabolic Dish Gain and Beamwidth One common shortcut in antenna gain measurements is to approximate the gain from the 3 dB

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Chapter 4 PARABOLIC DISH ANTENNAS Paul Wade N1BWT © 1994,1998 Introduction Parabolic dish antennas can provide extremely high gains at microwave frequencies. A 2foot dish at 10 GHz can provide more than 30 dB of gain.

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UWB enhanced Microwave Fire Detection Ingolf Willms, Thomas Kaiser University Duisburg-Essen, Duisburg, Germany H. Sachs TU Ilmenau, Ilmenau, GermanyAbstract Microwave Fire Detection is a passive detection tec

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Chapter 11 PARABOLIC DISH FEEDS — PERFORMANCE ANALYSIS Paul Wade N1BWT © 1997,1998 Achieving optimum performance from a microwave dish antenna requires that the feed

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