site-title
;
;
Share on Google+

About Author

author

"Got Inspired by Techie World"

Wireless Invetion to Smart Phones Innovation

Undoubtedly world has changed isn't it? If you ask any 5 people around the world about how the world has changed over last 2 decades. 4 out of 5 will answer Wireless Technology, Mobile, Smart Phones, Mobile Apps.The interesting question would be why & how Wireless Technology has influenced majority of world? Ever since the humans are evolved on this earth their thirst for speed never quenched. Let us understand how our communication system has changed every since Wireless Communication is opened door for public while it was only restricted to military use for many years. The mobile users world wide as of 2015 is 4.88 billion, and is expected to touch 5.03 billion by year 2017. People are getting so well connected these days through smart phones through Mobile Apps. Perhaps not sure how many people would plant a tree in their house to safe guard from global warming. The charisma of smart phones is touching the hearts of every human life more specially for kids with a range of Mobile app games offering these days.However question why the technology not used to bring a change in human mind & thinking for a better future is off topic. Back to our discussion the first wireless conversation happened during the year 1880 when Alexander Graham Bell and Charles Sumner Tainter invented and patented PhotoPhone a telephone that conducted audio transmission over modulated light beams.PhotoPhone requires required clear sight between transmitter and receiver. After a few decades photophone was in use by militrary communications and in fiber optic communications.

Existence of Electro Magnetic Waves

In the year 1888 Heinrich Hertz demonstrated that electro magnetic waves travelled through space in straight lines, the underlying source for most wireless communications. He has convinced that these electro magnetic waves could be transmitted and received.

Proof of Concept by Indian Scientist Jagadish Chandra Bose

Jagadish Chandra Bose developed a wireless detection device which has become an important source for all future wireless inventions.

In May 1897, two years after Bose's public demonstration in Kolkata, Marconi conducted his wireless signalling experiment on Salisbury Plain. Bose went to London on a lecture tour Jagadish Chandra Bosein 1896 and met Marconi, who was conducting wireless experiments for the British post office. In an interview, Bose expressed disinterest in commercial telegraphy and suggested others use his research work. In 1899, Bose announced the development of a "iron-mercury-iron coherer with telephone detector" in a paper presented at the Royal Society, London.

Bose's demonstration of remote wireless signalling has priority over Marconi. He was the first to use a semiconductor junction to detect radio waves, and he invented various now commonplace microwave components. In 1954, Pearson and Brattain gave priority to Bose for the use of a semi-conducting crystal as a detector of radio waves. Further work at millimetre wavelengths was almost nonexistent for nearly 50 years. In 1897, Bose described to the Royal Institution in London his research carried out in Kolkata at millimetre wavelengths. He used waveguides, horn antennas, dielectric lenses, various polarisers and even semiconductors at frequencies as high as 60 GHz; much of his original equipment is still in existence, now at the Bose Institute in Kolkata. A 1.3 mm multi-beam receiver now in use on the NRAO 12 Metre Telescope, Arizona, U.S.A. incorporates concepts from his original 1897 papers.

Sir Nevill Mott, Nobel Laureate in 1977 for his own contributions to solid-state electronics, remarked that "J.C. Bose was at least 60 years ahead of his time" and "In fact, he had anticipated the existence of P-type and N-type semiconductors."