GB2336472B - Frequency selective radar absorbent structure - Google Patents

Frequency selective radar absorbent structure

Info

Publication number
GB2336472B
GB2336472B GB9213786A GB9213786A GB2336472B GB 2336472 B GB2336472 B GB 2336472B GB 9213786 A GB9213786 A GB 9213786A GB 9213786 A GB9213786 A GB 9213786A GB 2336472 B GB2336472 B GB 2336472B
Authority
GB
United Kingdom
Prior art keywords
layer
thickness
absorbent structure
frequency selective
radar absorbent
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 - Lifetime
Application number
GB9213786A
Other versions
GB2336472A (en
GB9213786D0 (en
Inventor
Andrew James Mackay
Michael Adrian Wood
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.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
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 UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Publication of GB9213786D0 publication Critical patent/GB9213786D0/en
Publication of GB2336472A publication Critical patent/GB2336472A/en
Application granted granted Critical
Publication of GB2336472B publication Critical patent/GB2336472B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q17/00—Devices for absorbing waves radiated from an antenna; Combinations of such devices with active antenna elements or systems
    • 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

Abstract

The structure 10 has a layered construction. It includes a conducting layer 12, a central layer 14 of thickness h and a patterned conducting layer 16 of thickness g, these layers being successively disposed. The patterned layer 16 has an array of slots such as 18. In the central layer 14, the product of propagation loss/unit length and thickness h lies in the range 0.005 to 0.1. The structure is able to absorb incident energy by means of the excitation of surface waves in the substrate layer 14. This enables the dielectric layer to be thin.
GB9213786A 1991-07-24 1992-06-22 Frequency selective radar absorbent structure Expired - Lifetime GB2336472B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9115970A GB9115970D0 (en) 1991-07-24 1991-07-24 Frequency selective radar absorbent structure

Publications (3)

Publication Number Publication Date
GB9213786D0 GB9213786D0 (en) 1999-08-11
GB2336472A GB2336472A (en) 1999-10-20
GB2336472B true GB2336472B (en) 2000-03-29

Family

ID=10698890

Family Applications (2)

Application Number Title Priority Date Filing Date
GB9115970A Ceased GB9115970D0 (en) 1991-07-24 1991-07-24 Frequency selective radar absorbent structure
GB9213786A Expired - Lifetime GB2336472B (en) 1991-07-24 1992-06-22 Frequency selective radar absorbent structure

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB9115970A Ceased GB9115970D0 (en) 1991-07-24 1991-07-24 Frequency selective radar absorbent structure

Country Status (1)

Country Link
GB (2) GB9115970D0 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3739230B2 (en) * 1999-04-26 2006-01-25 株式会社日立製作所 High frequency communication equipment
GB2404087A (en) * 2003-07-18 2005-01-19 Qinetiq Ltd Electromagnetic radiation absorber
CN1922948B (en) 2004-02-27 2011-06-22 三菱瓦斯化学株式会社 Radio wave absorber and manufacturing method thereof
JP4461970B2 (en) * 2004-09-06 2010-05-12 三菱瓦斯化学株式会社 Radio wave absorber
EP2096711B1 (en) * 2005-10-21 2017-01-25 Nitta Corporation Sheet body for improving communication, antenna device provided with such sheet body and electronic information transmitting apparatus
GB2473020B (en) 2009-08-27 2012-02-01 Vestas Wind Sys As Wind turbine composite structures
FR3057400B1 (en) * 2016-10-10 2018-11-23 Abel Franco Garcia MULTIDEPHASEUR DEVICE FOR ELECTROMAGNETIC WAVES OPERATING IN PARTICULAR THREE DIMENSIONALLY.

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887920A (en) * 1961-03-16 1975-06-03 Us Navy Thin, lightweight electromagnetic wave absorber
EP0015804A2 (en) * 1979-03-02 1980-09-17 Thomson-Csf Polarizing device and microwave antenna comprising same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3887920A (en) * 1961-03-16 1975-06-03 Us Navy Thin, lightweight electromagnetic wave absorber
EP0015804A2 (en) * 1979-03-02 1980-09-17 Thomson-Csf Polarizing device and microwave antenna comprising same

Also Published As

Publication number Publication date
GB2336472A (en) 1999-10-20
GB9115970D0 (en) 1999-08-11
GB9213786D0 (en) 1999-08-11

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Expiry date: 20120621