GB753886A - Improvements in or relating to multi-channel high frequency communication systems - Google Patents

Improvements in or relating to multi-channel high frequency communication systems

Info

Publication number
GB753886A
GB753886A GB869854A GB869854A GB753886A GB 753886 A GB753886 A GB 753886A GB 869854 A GB869854 A GB 869854A GB 869854 A GB869854 A GB 869854A GB 753886 A GB753886 A GB 753886A
Authority
GB
United Kingdom
Prior art keywords
channel
aerial
line
band
same
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
GB869854A
Inventor
Leonard Lewin
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 GB869854A priority Critical patent/GB753886A/en
Publication of GB753886A publication Critical patent/GB753886A/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
    • H01P1/20—Frequency-selective devices, e.g. filters
    • H01P1/213—Frequency-selective devices, e.g. filters combining or separating two or more different frequencies
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J1/00—Frequency-division multiplex systems
    • H04J1/02—Details
    • H04J1/12—Arrangements for reducing cross-talk between channels

Landscapes

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

Abstract

753,886. Multiplex radio signalling. STANDARD TELEPHONES & CABLES, Ltd. March 25, 1954, No. 8698/54. Class 40 (5). A first set of individual channel devices 1, 2, 3, Fig. 3, utilizing respective non-overlapping frequency bands A, B, C are connected to a first multi-channel transmission guiding medium such as the aerial 10a by the same coupling means 4, 5, 6 as is used to connect a second similar set 28, 29, 30, using the same respective bands A<SP>1</SP>, B<SP>1</SP>, C<SP>1</SP>, to a second medium such as the aerial 27a. The coupling means comprises three band rejection filter units 4, 5, 6, which reject the respective bands A, B, C connected in series between the aerials 10a, 27a, the corresponding channel devices of the two sets being connected to opposite ends of the filter for the frequency band utilizer thereby. The channel devices may be all transmitters or all receivers. or one set may be transmitters and the other receivers. The rejection filter units, such as 4, may comprise a hybrid network 18, Fig. 2, the main output of which is connected to the aerial feeder 10 while the other main arm is connected to line 7 of channel device 1. A second hybrid network 19 has its main arms connected respectively to line 15 of channel unit 28 and line 20 leading to the next filter unit 5. Between the two pairs of corresponding side arms of the hybrid networks 18, 19 are connected band-rejection filters 23, 26, the total phase shift in each arm at the mean wavelength being the same, but quarter wavelength phase displacements being provided between the two inputs and the two outputs of the filters. Specification 734,545 is referred to.
GB869854A 1954-03-25 1954-03-25 Improvements in or relating to multi-channel high frequency communication systems Expired GB753886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB869854A GB753886A (en) 1954-03-25 1954-03-25 Improvements in or relating to multi-channel high frequency communication systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB869854A GB753886A (en) 1954-03-25 1954-03-25 Improvements in or relating to multi-channel high frequency communication systems

Publications (1)

Publication Number Publication Date
GB753886A true GB753886A (en) 1956-08-01

Family

ID=9857522

Family Applications (1)

Application Number Title Priority Date Filing Date
GB869854A Expired GB753886A (en) 1954-03-25 1954-03-25 Improvements in or relating to multi-channel high frequency communication systems

Country Status (1)

Country Link
GB (1) GB753886A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046741A2 (en) * 1980-08-25 1982-03-03 Communications Satellite Corporation High power multiplexer for dual polarized frequency reuse earth stations

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0046741A2 (en) * 1980-08-25 1982-03-03 Communications Satellite Corporation High power multiplexer for dual polarized frequency reuse earth stations
EP0046741A3 (en) * 1980-08-25 1982-03-10 Communications Satellite Corporation High power multiplexer for dual polarized frequency reuse earth stations

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