SE8100358L - POLARIZATION DISTURBING REFLECTOR FOR WHITE DIFFERENT FREQUENCY BANDS AND ANTENNA WITH SUCH REFLECTOR - Google Patents

POLARIZATION DISTURBING REFLECTOR FOR WHITE DIFFERENT FREQUENCY BANDS AND ANTENNA WITH SUCH REFLECTOR

Info

Publication number
SE8100358L
SE8100358L SE8100358A SE8100358A SE8100358L SE 8100358 L SE8100358 L SE 8100358L SE 8100358 A SE8100358 A SE 8100358A SE 8100358 A SE8100358 A SE 8100358A SE 8100358 L SE8100358 L SE 8100358L
Authority
SE
Sweden
Prior art keywords
reflector
frequency bands
grids
different frequency
antenna
Prior art date
Application number
SE8100358A
Other languages
Swedish (sv)
Other versions
SE448195B (en
Inventor
M Bonnedal
L Josefsson
R Karlsson
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Priority to SE8100358A priority Critical patent/SE448195B/en
Publication of SE8100358L publication Critical patent/SE8100358L/en
Publication of SE448195B publication Critical patent/SE448195B/en

Links

Classifications

    • 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)
  • Aerials With Secondary Devices (AREA)

Abstract

The reflector is for electromagnetic waves, and can turn one quarter of the polarisation direction in the reflected waves, and at the same time within two widely differing frequency bands, such as those with frequencies in the proportion of 4 to 1. For polarisation turning, two wire grids comprising parallel metal wires are placed parallel to a metal reflector's surface, and at different distances from it. Both wire grids are encased by a layer of dielectric material and the same material is between the reflector's surface and the grids. The distance from each of the grids to the surface of the metal reflector is in a ratio between 0.11 and 0.13, the distance being calculated in wavelength in the dielectric material. A cassegrain type aerial with a main reflector and one secondary is used for electromagnetic wave transmission and reception within the two very different frequency bands. (Provisional Basic advised week E36)
SE8100358A 1981-01-22 1981-01-22 Electromagnetic wave reflector SE448195B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE8100358A SE448195B (en) 1981-01-22 1981-01-22 Electromagnetic wave reflector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8100358A SE448195B (en) 1981-01-22 1981-01-22 Electromagnetic wave reflector

Publications (2)

Publication Number Publication Date
SE8100358L true SE8100358L (en) 1982-07-23
SE448195B SE448195B (en) 1987-01-26

Family

ID=20342945

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8100358A SE448195B (en) 1981-01-22 1981-01-22 Electromagnetic wave reflector

Country Status (1)

Country Link
SE (1) SE448195B (en)

Also Published As

Publication number Publication date
SE448195B (en) 1987-01-26

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