GB1048354A - Frequency changer system for multiple channel receivers - Google Patents

Frequency changer system for multiple channel receivers

Info

Publication number
GB1048354A
GB1048354A GB1005365A GB1005365A GB1048354A GB 1048354 A GB1048354 A GB 1048354A GB 1005365 A GB1005365 A GB 1005365A GB 1005365 A GB1005365 A GB 1005365A GB 1048354 A GB1048354 A GB 1048354A
Authority
GB
United Kingdom
Prior art keywords
horns
wires
horn
lens
reception
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
GB1005365A
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.)
Thales SA
Original Assignee
CSF Compagnie Generale de Telegraphie sans Fil SA
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 CSF Compagnie Generale de Telegraphie sans Fil SA filed Critical CSF Compagnie Generale de Telegraphie sans Fil SA
Publication of GB1048354A publication Critical patent/GB1048354A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D9/00—Demodulation or transference of modulation of modulated electromagnetic waves
    • H03D9/06—Transference of modulation using distributed inductance and capacitance
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/14—Reflecting surfaces; Equivalent structures
    • H01Q15/22—Reflecting surfaces; Equivalent structures functioning also as polarisation filter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • H01Q19/18—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces
    • H01Q19/19—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface
    • H01Q19/195—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces having two or more spaced reflecting surfaces comprising one main concave reflecting surface associated with an auxiliary reflecting surface wherein a reflecting surface acts also as a polarisation filter or a polarising device

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

1,048,354. Frequency changing arrangements; aerials. CSF-COMPACNIE GENERALE DE TELEGRAPHIE SANS FIL. March 9, 1965 [March 9, 1964], No.10053/65. Headings H3F and H4A. In an arrangement for feeding a plurality of V.H.F. reception channels, reception horns 4 are located in the focal plane of electromagnetic lens 1 which intercepts the incident signal waves. Between the lens and the horns is located a plurality of parallel wires 2, lying in a plane at 45 degrees to the axis of the system, and each wire being at right-angles to the electric plane of polarization of the signal wave so as to cause no interference thereto. Energy from local oscillator 5 is radiated from horn 6 and impinges on wires 2 at right-angles to the system axis; it is arranged to be polarized electrically in the direction of wires 2 so that reflection occurs into the horns 2. Horn 6 is so located that its image in wire reflector 2 lies on the surface of lens 1. The Specification also describes a modification in which the horn 6 faces in the same direction as reception horns 4 and the reflector 2 is placed against the surface of lens 1 (Fig. 2, not shown) and a further modification using a parabolic mirror. In this (Figs. 3-5, not shown) reception horns 4 receive energy directly from the horn 6 fed by the local oscillator and it is the received signal which is reflected into the horns by the wire reflector, its plane of polarization being rotated, for this purpose, in reflection in the parabolic mirror by means of a second set of parallel wires located a half-wavelength away from the surface of the mirror and at an angle of 45 degrees to the first set of wires.
GB1005365A 1964-03-09 1965-03-09 Frequency changer system for multiple channel receivers Expired GB1048354A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR966619A FR1396404A (en) 1964-03-09 1964-03-09 New frequency change system for multi-channel receiver

Publications (1)

Publication Number Publication Date
GB1048354A true GB1048354A (en) 1966-11-16

Family

ID=8825021

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1005365A Expired GB1048354A (en) 1964-03-09 1965-03-09 Frequency changer system for multiple channel receivers

Country Status (2)

Country Link
FR (1) FR1396404A (en)
GB (1) GB1048354A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080319A1 (en) * 1981-11-19 1983-06-01 The Marconi Company Limited Antenna assemblies

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2153164B1 (en) * 1971-09-22 1976-10-29 Thomson Csf

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0080319A1 (en) * 1981-11-19 1983-06-01 The Marconi Company Limited Antenna assemblies

Also Published As

Publication number Publication date
FR1396404A (en) 1965-04-23

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