WAVE PICTURE OF MICROWAVE TUBES 1371 



these terms." Such coupHiig has been considered in general terms by- 

 Pierce. 



6. The Space-Charge-Wave Amplifier 



This tube was invented by Tien, Field and Watkins^* and is described 

 in more detail by Tien and Field. 



7. The Traveling Wave Tube 



Adequate descriptions and references are available in work by Kompf- 

 ner/*^ Pierce," and Beck. 



8. Double-Stream Amplifiers 



Descriptions and references are given by Pierce" and by Beck. 



9. Noise Waves in Electron Streams 



Cutler and Quate have published experimental results. The theorems 

 quoted are given by Pierce. 



10. Noise Deamplification 



This was suggested by Tien, Field and Watkins^^ and is described in 

 detail by Watkins^^ and Peter.' 



11. Noise Cancellation 



Noise cancellation was first proposed by C. F. Quate. 



REFERENCES 



1. Lewi Tonks and Irving Langmuir, Pliys. Rev., 33, pp. 195-210 and p. 990, 1929. 



2. W. C. Hahn, Gen. Elect. Rev., 42, pp. 258-270, 1939. 



3. Simon Ramo, Phys. Rev., 56, pp. 276-283, 1939. 



4. J. R. Pierce, Jour. App. Phys., 19, pp. 231-236, 1948. 



5. D. Bohm and E. P. Gross, Phys. Rev., 75, pp. 1851-1876, 1949, 79, pp. 992-1001, 



1950. 



6. L. J. Chu, paper presented at the Institute of Radio Engineers Electron 



Devices Conference, University of New Hampshire, June, 1951. 



7. L. R. Walker, J. App. Phys., 25, pp. 615-618, May, 1954. 



8. Thermionic Valves, A. H. W. Beck, Cambridge University Press, 1953. 



9. J. R. Pierce, B. S.T.J. , 30, pp. 626-651, 1951. 



10. Charles K. Birdsall, George R. Brewer and Andrew V. Haeff, Proc. I. R. E., 



pp. 865-871, 1953. 



11. Traveling Wave Tubes, J. R. Pierce, Van Nostrand (1950). 



12. W. E. Mathews, J. App. Phys., 22, pp. 310-316, 1951. 



