the unsung Hero of Radio Communication

[Bose's Achievements][Bose:Inventor of Marconi's wireless Receiver] [Bose Detector] [The Bose Project] [Interesting Links]

This page is dedicated to highlight the contribution of Sir J. C. Bose to (primarily) the invention of radio It celebrates and seeks to acquaint and enthuse researchers, academicians and professionals about the works of Sir J. C. Bose, which remained unnoticed till recently. Also, this information will be of interest to people studying the history of radio communication. This page will be constantly updated and contributions, interesting links and discussions are encouraged. Kindly mail me, if you will like to know when this page is updated next, a g g a r w a l _ v a r u n @ h o t m a i l . c o m

Achievements of Sir J. C. Bose in the field of communication
(In a Nutshell)

Jagadish Chandra Bose: The Real Inventor of Marconi's Wireless Receiver
-Varun Aggarwal

In the year 1998, Dr. Probir K. Bondyopadhyay found out that it was actually Sir J. C. Bose who invented Marconi's Italian Navy Autocoherer. He explained the sequence of events in great detail in his paper, "Sir J. C. Bose's Diode Detector Received Marconi's First Transatlantic Wireless Signal Of December 1901 (The "Italian Navy Coherer" Scandal Revisited)." [ 3, Proc. IEEE, Vol. 86, No. 1, January 1998.]

Read a complete article covering the technical details of Marconi's experiment, the receiving device (coherer) and the chronology of events that took place when the first transatlantic wave was successfully transmitted. The article clearly proves that Sir J. C. Bose was the inventor of the Mercury Autocoherer.

The article goes into technical details and background to enable a person with no knowledge of history of radio communication to understand the contribution of Sir J. C. Bose clearly. You will definitely enjoy the concepts and devices used at a time when modulation was not known and diode had not been invented!

A short version of the complete article now published in Ancient Wireless Association Journal is available here.
(Citation: V. Aggarwal, "Jagadish Chandra Bose: The Real Inventor of Marconiís Wireless Detector", The Ancient Wireless Association Journal, July 2006, Vol. 47/#3, pp. 50-54)

Experiments with a Replica of the Bose Detector
- K. L. Groenhaug

The autocoherer invented by Bose was nearly a solid state diode, which was actually invented some 50 years after the autocoherer was invented. Groenhaug built a replica of a Bose detector and compared its characteristics with that of a diode. Have a look at this interesting paper. Groenhaug also plans to study the performance of Bose's galena detector and I eagerly wait for the results of his study.

Sir J. C. Bose: Unsung Hero of Radio Communication
An Ongoing Project

The current findings solely focus on the fact that the receiver for the first trans-atlantic radio communication was designed by Sir J. C. Bose. However, there are several other interesting research aspects (missing links) in concern with the contribution of Sir J. C. Bose towards the invention of radio. This is an appeal to young engineers to take these as a research assignment! I would love to be a part of any such activity.

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Who did it first: Who was the first to demonstrate remote transmission of EM waves? Was it Sir J. C. Bose?

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Demystifying J. C. Bose's patent: Bose's 1904 patent was invention of a galena crystal detector, verily a diode. Is this 'the solid state detector', which was later used as a receiver for demodulating continuous wave radio signals (voice transmission) ?

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Home-made coherers: Coherers and Auto-coherers are devices which are still not very clearly understood (in all the literature I have seen). Surely, it will be intellectually stimulating to build them, experiment with them and understand their operation!

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Did Popov invent radio: It is so claimed and believed by some, that Popov, a Russian scientist was the first to transmit information over wireless. Where does he fit in the history of radio communication?


Interesting Links : The Works of Jagadis Chandra Bose: 100 years of MM-wave Research. (Excellent description and photographs of devices built by Bose some 100 years back.) : The Bose Institute. : Fessenden and the Early History of Radio Science. (Fessenden is another unsung hero of Radio Communication. His work was mainly in continuous wave radio communication.) and /marconi1901a.htm : Did Marconi Receive Transatlantic Radio Signals in 1901?, Parts 1 & 2. (A fresh look in Marconi's experiment and an examination of its technicalities.)

Though this page would probably have a variety of audience, I believe that every electronics/electrical engineer graduating out of India should know about the distinguished contribution of Sir J. C. Bose to the field of communication. Hopefully, this page will initiate interest in people to study the works of Bose and interesting discussions will ensue.

There is more to come, keep visiting and leave your mail ID with me, if you want to be informed with the latest updates.


1. Darrel T. Emerson, “The Work of Jagadis Chandra Bose: 100 Years of Millimeter-Wave Research,” IEEE Transactions on Microwave Theory and Techniques, Vol. 45, No. 12, pp. 2267-2273, Dec. 1997

2. T. K. Sarkar, D. L. Sengupta, “An Appreciation of J. C. Bose’s Pioneering Work in Millimeter Wave”, IEEE Antenna and Propagation Magazine, Vol. 39, No. 5, Oct. 1997

3. Probir K. Bondyopadhyay, "Sir J. C. Bose's Diode Detector Received Marconi's First Transatlantic Wireless Signal Of December 1901 (The "Italian Navy Coherer" Scandal Revisited)," Proc. IEEE, Vol. 86, No. 1, January 1998.

Maintained by Varun Aggarwal
Acknowledgement: Dr. Henry Bradford, during discussions with whom the idea of this page cropped up.
I will like to thank IEEE for their cooperation.