File:Braun phased array antenna 1905.png

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File:Braun phased array antenna 1905.png

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Summary

DescriptionBraun phased array antenna 1905.png	English: First experimental phased array antenna, invented by Karl Ferdinand Braun in 1905 in Strasbourg, Germany. This was a 3 element array antenna which transmitted a beam of radio waves whose direction could be rotated electronically to 3 directions 120° apart. It consists of 3 monopole antennas at the corners of an equilateral triangle whose bisector is a quarter wavelength long. Two of the antennas are fed in phase but a quarter wave phase delay can be switched into the feed line of one. Braun won the Nobel Prize in Physics in 1909 for his radio work. Phased arrays are now widely used in radar and many other applications.
Date	December 1909
Source	Retrieved January 14, 2017 from Karl Ferdinand Braun (December 11, 1909) Nobel Lecture: Electrical oscillations and wireless telegraphy, nobelprize.org Nobel Media AB, p. 230, fig. 14. Credited on site to Nobel Lectures: Physics 1901 to 1921, Elsevier Publishing Co., Amsterdam, 1967
Author	Karl Ferdinand Braun

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	05:49, 15 January 2017		436 × 343 (8 KB)	Chetvorno	User created page with UploadWizard

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Phased array

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File change date and time	02:02, 15 January 2017

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December 1909^Gregorian

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Captions

Items portrayed in this file

depicts

inception

December 1909Gregorian

media type

image/png

checksum

26c96f9ff4dbb017030815cebfe89c32bbe93ba1

data size

8,071 byte

height

343 pixel

width

436 pixel

File history

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Global file usage

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December 1909^Gregorian