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GB579873A - Improvements in or relating to keying arrangements for radio frequencies - Google Patents

Improvements in or relating to keying arrangements for radio frequencies

Info

Publication number
GB579873A
GB579873A GB747944A GB747944A GB579873A GB 579873 A GB579873 A GB 579873A GB 747944 A GB747944 A GB 747944A GB 747944 A GB747944 A GB 747944A GB 579873 A GB579873 A GB 579873A
Authority
GB
United Kingdom
Prior art keywords
blocks
discs
coupling
screens
lines
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
GB747944A
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.)
STC PLC
Original Assignee
Standard Telephone and Cables PLC
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 Standard Telephone and Cables PLC filed Critical Standard Telephone and Cables PLC
Priority to GB747944A priority Critical patent/GB579873A/en
Priority to FR939188D priority patent/FR939188A/en
Publication of GB579873A publication Critical patent/GB579873A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P1/00—Auxiliary devices
    • H01P1/10—Auxiliary devices for switching or interrupting
    • H01P1/12—Auxiliary devices for switching or interrupting by mechanical chopper
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

579,873. Modulating apparatus; directive wireless systems. STANDARD . TELEPHONES & CABLES, Ltd., and WILLOUGHBY, E. O. April 21, 1944, No. 7479. [Class 40 (v)] A feed line is coupled alternately to two transmission lines by coupling-reactances, and screening means are provided to prevent adventitious coupling. The system is particularly intended for use in blind approach beacon systems for aircraft. The feed line T has its inner conductor connected to a channel-section block P2 and the respective transmission lines A1, A2 are similarly connected to blocks P1, P3. A rotary shaft S carries a circular disc D2 co-operating with the block P2, and two sectorshaped .complementary discs D1, D3 co-operating respectively with the blocks P1, P3, so that energy is alternately conveyed to the lines A1, A2 through the capacities formed by the blocks and discs. Adventitious coupling between the blocks is reduced by interposing screens S12, S23 between the blocks, thus dividing the con. tainer K into three compartments. The lines T, A1, A2, terminate in matching stubs M1, M2, M3 closed by adjustable short-circuiting discs. The shaft S runs in bearings at the end of tubular casings K1, K2 connected to the main casing K. The shaft forms with each casing K1, K2 a short coaxial line adjustable in length by shortcircuiting discs L1, L2. In a modified arrangement, the interposed screens S12, S23 are replaced by channel-shaped screens surrounding the blocks P1, P2, P3, Fig. 5 (not shown). Specifications 516,149 and 532,122 are referred to.
GB747944A 1944-04-21 1944-04-21 Improvements in or relating to keying arrangements for radio frequencies Expired GB579873A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB747944A GB579873A (en) 1944-04-21 1944-04-21 Improvements in or relating to keying arrangements for radio frequencies
FR939188D FR939188A (en) 1944-04-21 1946-06-22 Enhancements to high frequency manipulation devices

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB747944A GB579873A (en) 1944-04-21 1944-04-21 Improvements in or relating to keying arrangements for radio frequencies

Publications (1)

Publication Number Publication Date
GB579873A true GB579873A (en) 1946-08-19

Family

ID=9833900

Family Applications (1)

Application Number Title Priority Date Filing Date
GB747944A Expired GB579873A (en) 1944-04-21 1944-04-21 Improvements in or relating to keying arrangements for radio frequencies

Country Status (2)

Country Link
FR (1) FR939188A (en)
GB (1) GB579873A (en)

Also Published As

Publication number Publication date
FR939188A (en) 1948-11-05

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