GB261758A - Improvements in or relating to wireless telegraphy and telephony - Google Patents

Improvements in or relating to wireless telegraphy and telephony

Info

Publication number
GB261758A
GB261758A GB29055/26A GB2905526A GB261758A GB 261758 A GB261758 A GB 261758A GB 29055/26 A GB29055/26 A GB 29055/26A GB 2905526 A GB2905526 A GB 2905526A GB 261758 A GB261758 A GB 261758A
Authority
GB
United Kingdom
Prior art keywords
aerial
fading
reflector
reflectors
wireless
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
GB29055/26A
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.)
BAE Systems Electronics Ltd
Original Assignee
Marconis Wireless Telegraph Co Ltd
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 Marconis Wireless Telegraph Co Ltd filed Critical Marconis Wireless Telegraph Co Ltd
Publication of GB261758A publication Critical patent/GB261758A/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
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/44—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system varying the electric or magnetic characteristics of reflecting, refracting, or diffracting devices associated with the radiating element

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

261,758. Marconi's Wireless Telegraph Co., Ltd., (Assignees of Usselman, G. L.). Nov. 18, 1925, [Convention date]. Directive signalling; fading, preventing.- In a directional system of wireless, fluctuation of signal strength due to fading is avoided by constantly varying the angle of the beam path. As shown in the Figure, a main " doublet " aerial 1 is backed by two reflector aerials 2, 3 arranged parallel to the first and a quarter wavelength away from it. Each reflector aerial is connected by leads 4, 5 to a variable condenser, the moving vanes 8, 9 of which are rotated bv a motor 10. As the vanes rotate the reflectors 2, 3 are alternately tuned to the fundamental frequency of the main aerial 1, so that first one and then the other determines the directional path of the radiating beam. The angular distance between the reflectors determines the extent of wobble, which may vary according to circumstances. The angular variation may be in the horizontal or vertical plane, and may occur at an audible or supersonic frequency.
GB29055/26A 1925-11-18 1926-11-17 Improvements in or relating to wireless telegraphy and telephony Expired GB261758A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US69817A US1821367A (en) 1925-11-18 1925-11-18 Beam wobbler

Publications (1)

Publication Number Publication Date
GB261758A true GB261758A (en) 1927-02-17

Family

ID=22091396

Family Applications (1)

Application Number Title Priority Date Filing Date
GB29055/26A Expired GB261758A (en) 1925-11-18 1926-11-17 Improvements in or relating to wireless telegraphy and telephony

Country Status (3)

Country Link
US (1) US1821367A (en)
GB (1) GB261758A (en)
NL (1) NL22065C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2415932A (en) * 1943-04-21 1947-02-18 Rca Corp Antenna system

Also Published As

Publication number Publication date
US1821367A (en) 1931-09-01
NL22065C (en)

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