Gustav Guanella

Gustav Guanella (June 21, 1909 – January 12, 1982) was a Swiss inventor who held numerous patents.

Guanella was born in Chur, then educated in Lucerne, Switzerland. He finished high school in 1929, studied electrical engineering at the Swiss Federal Institute of Technology in Zurich (ETH Zurich) and graduated in 1933. There, he became assistant to Professor Fritz Fischer, known as the inventor of the Eidophor large-screen video projection system, at the Institute of Technical Physics until 1937, followed by a few years as a consultant to different companies.

In 1938 he married Hanni Zietschmann.

From 1941 until his retirement he worked for Brown, Boveri & Cie, Baden, Switzerland (BBC). Already in 1943 he was made head of a department involved in high-frequency electronics product development, where he made important contributions to this field.

He retired in 1973 and died of brain tumor in 1982.

Guanella had a strong interest in electronics, especially high-frequency (HF) techniques. While he did consulting work for various companies such as Philips, AEG and BBC, he came up with inventions resulting in 40 patent application before entering employment at BBC. Some of these early inventions related to locating and radio direction-finding solutions as predecessors to radar before and during the first years of World War II.

His most important inventions were conceived while working for BBC from 1941 onwards. It is less known that BBC had a rapidly growing electronics division besides electrical equipment manufacturing. Guanella and other outstanding engineers positioned the company in the fields of radio transmitters, power line communications, microwave links and encryption techniques. In particular, Guanella is credited as one of the inventors of the Direct Sequence Spread Spectrum (DSSS) transmission technique. The patent filing date in Switzerland was January 29, 1942. The corresponding US Patent 2405500 Means for and method of secret signaling was granted in 1946. DSSS is of considerable importance for mobile radio up to now.

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