GB2278021B - Waveguide - Google Patents

Waveguide

Info

Publication number
GB2278021B
GB2278021B GB9412939A GB9112939A GB2278021B GB 2278021 B GB2278021 B GB 2278021B GB 9412939 A GB9412939 A GB 9412939A GB 9112939 A GB9112939 A GB 9112939A GB 2278021 B GB2278021 B GB 2278021B
Authority
GB
United Kingdom
Prior art keywords
waveguide
altering
selective surfaces
frequency selective
frequencies
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 - Fee Related
Application number
GB9412939A
Other versions
GB9112939D0 (en
GB2278021A (en
Inventor
John Costas Vardaxoglou
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.)
Loughborough University
Original Assignee
Loughborough University
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
Priority claimed from GB9019628A external-priority patent/GB9019628D0/en
Application filed by Loughborough University filed Critical Loughborough University
Publication of GB9112939D0 publication Critical patent/GB9112939D0/en
Publication of GB2278021A publication Critical patent/GB2278021A/en
Application granted granted Critical
Publication of GB2278021B publication Critical patent/GB2278021B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
    • H01Q15/002—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices being reconfigurable or tunable, e.g. using switches or diodes
    • 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
    • H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
    • H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
    • H01Q15/0026—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices having a stacked geometry or having multiple layers

Landscapes

  • Control Of Motors That Do Not Use Commutators (AREA)
  • Aerials With Secondary Devices (AREA)

Abstract

A waveguide (4) includes a pair of frequency selective surfaces (5) arranged parallel to its shorter sides (6). The frequency selective surfaces (5) reflect certain frequencies of electromagnetic radiation and transmit other frequencies, thereby altering the effective dimensions of the waveguide and altering its frequency response. <IMAGE>
GB9412939A 1990-09-07 1991-09-06 Waveguide Expired - Fee Related GB2278021B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9019628A GB9019628D0 (en) 1990-09-07 1990-09-07 Reconfigurable frequency selective surface
GB9119039A GB2253519B (en) 1990-09-07 1991-09-06 Reconfigurable frequency selective surfaces

Publications (3)

Publication Number Publication Date
GB9112939D0 GB9112939D0 (en) 1994-08-17
GB2278021A GB2278021A (en) 1994-11-16
GB2278021B true GB2278021B (en) 1995-04-19

Family

ID=26297626

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9412939A Expired - Fee Related GB2278021B (en) 1990-09-07 1991-09-06 Waveguide

Country Status (1)

Country Link
GB (1) GB2278021B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328319B (en) * 1994-06-22 1999-06-02 British Aerospace A frequency selective surface
GB0126737D0 (en) * 2001-11-07 2002-01-02 Univ Glasgow Filter
FI127914B (en) 2014-08-21 2019-05-15 Stealthcase Oy Device and method for guiding electromagnetic waves

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB600433A (en) * 1945-10-31 1948-04-08 Henry George Booker Improvements in or relating to wireless aerials
GB1235879A (en) * 1968-08-19 1971-06-16 Edward Bellamy Mcmillan Lattice aperture antenna

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB600433A (en) * 1945-10-31 1948-04-08 Henry George Booker Improvements in or relating to wireless aerials
GB1235879A (en) * 1968-08-19 1971-06-16 Edward Bellamy Mcmillan Lattice aperture antenna

Also Published As

Publication number Publication date
GB9112939D0 (en) 1994-08-17
GB2278021A (en) 1994-11-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060906