antentopSince2 July

Ham Spirit
Free Choice



Free Antentop Amateur Open Book
Antentop Album
Antentop Survey




Antentop is FREE e-magazine devoted to Antennas and Amateur Radio an

Special page devoted to

Jagadis Chandra Bose

Custom Search


ANTENTOP- 02- 2003, # 003

Jagadis Chandra Bose


Figure 2. Bose's apparatus demonstrated to the Royal Institution in London in 1897 [8]. Note the waveguide radiator on the transmitter at left, and that the "collecting funnel" (F) is in fact a pyramidal electromagnetic horn antenna, first used by Bose.


By about the end of the 19th century, the interests of Bose turned away from electromagnetic waves to response phenomena in plants; this included studies of the effects of electromagnetic radiation on plants, a topical field today. He retired from the Presidency College in 1915, but was appointed Professor Emeritus. Two years later the Bose Institute was founded. Bose was elected a Fellow of the Royal Society in 1920. He died in 1937, a week before his 80th birthday; his ashes are in a shrine at the Bose Institute in Calcutta.

The Radiator

Figure 3(a)




Bose's experiments were carried out at the Presidency College in Calcutta, although for demonstrations he developed a compact portable version of the equipment, including transmitter, receiver and various microwave components. Some of his original equipment still exists, now at the Bose Institute in Calcutta. In 1985 the author was permitted by the Bose Institute to examine and photograph some of this original apparatus.


Figure 3 (a) shows Bose's diagram of one of his radiators, used for generating 5-mm radiation.

Page 89


87 88 89 90 91 92 93 94 95 96


QRP Transceivers and PA from Accessible Parts IP for QRP Antentop Book Antentop Printed and e- magazines



Just for Fun:

Map IP Address

Thanks for your time!

Last Updated:

January 4, 2017 21:38

Antentop Home Page

Free Antentop Open Book