Abstract
THE wave filter is the fundamental necessity of all telecommunication work which is not simple telephony. Carrier-telephony and voice-frequency telegraphy, which enable us to pass tens or even, hundreds of times the quantity of information the basic systems permit, could not exist without the wave filter. The basic theory dates only from Campbell some thirty years ago. Since then, Zobel, Shea, Starr, Cauer, and many others have derived alternative methods of approach and practical schemes for arriving at economic designs of filters which are to fulfil more exacting conditions of operation.
Wave Filters
By Dr. L. C. Jackson. (Methuen's Monographs on Physical Subjects.) Pp. vii + 107. (London: Methuen and Co., Ltd., 1944.) 4s. 6d. net.
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HUGHES, L. Wave Filters. Nature 153, 635 (1944). https://doi.org/10.1038/153635a0
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DOI: https://doi.org/10.1038/153635a0