GB504021A - Improvements in or relating to electric wave filtering systems - Google Patents

Improvements in or relating to electric wave filtering systems

Info

Publication number
GB504021A
GB504021A GB2483837A GB2483837A GB504021A GB 504021 A GB504021 A GB 504021A GB 2483837 A GB2483837 A GB 2483837A GB 2483837 A GB2483837 A GB 2483837A GB 504021 A GB504021 A GB 504021A
Authority
GB
United Kingdom
Prior art keywords
band
low frequencies
relating
electric wave
wave filtering
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB2483837A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB2483837A priority Critical patent/GB504021A/en
Publication of GB504021A publication Critical patent/GB504021A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/12—Frequency diversity

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

504,021. Wide - band transmission. PERCIVAL, W. S. Sept. 13, 1937, No. 24838. [Class 40 (iv)] [Also in Group XL] The low frequencies of a wide frequency band 1 are isolated by a filter 5 and modulated at 6 onto a carrier whose frequency is higher than the highest frequency in 1. The modulated carrier is transmitted together with the band 1 over a cable 7, is selected at 12, demodulated and mixed with the original band 1, from which the low frequencies have been eliminated, to form the undistorted band 22. A filter 16 eliminates the modulated carrier from the transmitted signal, and low frequencies are isolated by 18 and subtracted from the signal passing the delay circuit 20. The delay network 21 equalizes the delay over the two channels 10, 11. Specifications 471,913 is referred to.
GB2483837A 1937-09-13 1937-09-13 Improvements in or relating to electric wave filtering systems Expired GB504021A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2483837A GB504021A (en) 1937-09-13 1937-09-13 Improvements in or relating to electric wave filtering systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2483837A GB504021A (en) 1937-09-13 1937-09-13 Improvements in or relating to electric wave filtering systems

Publications (1)

Publication Number Publication Date
GB504021A true GB504021A (en) 1939-04-13

Family

ID=10218027

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2483837A Expired GB504021A (en) 1937-09-13 1937-09-13 Improvements in or relating to electric wave filtering systems

Country Status (1)

Country Link
GB (1) GB504021A (en)

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