GB2381957B - Filter device - Google Patents

Filter device

Info

Publication number
GB2381957B
GB2381957B GB0226050A GB0226050A GB2381957B GB 2381957 B GB2381957 B GB 2381957B GB 0226050 A GB0226050 A GB 0226050A GB 0226050 A GB0226050 A GB 0226050A GB 2381957 B GB2381957 B GB 2381957B
Authority
GB
United Kingdom
Prior art keywords
layers
filter device
teeth
frequency
dielectric constant
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
GB0226050A
Other versions
GB2381957A (en
GB0226050D0 (en
Inventor
David Robert Sime Cumming
Timothy David Drysdale
Richard John Blaikie
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.)
University of Glasgow
Original Assignee
University of Glasgow
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 University of Glasgow filed Critical University of Glasgow
Publication of GB0226050D0 publication Critical patent/GB0226050D0/en
Publication of GB2381957A publication Critical patent/GB2381957A/en
Application granted granted Critical
Publication of GB2381957B publication Critical patent/GB2381957B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H01P1/2005—Electromagnetic photonic bandgaps [EPB], or photonic bandgaps [PBG]
    • 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
    • H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Electromagnetism (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

There is disclosed a filter device 10 for electromagnetic radiation which is tunable across a wide range of the e-m spectrum, eg 30 GHz to 100 THz. The filter device 10 comprises at least two layers of material 6a-c; the layers 6a-c being spaced apart by a medium have a lower dielectric constant and/or electrical conductivity than a dielectric constant and/or electrical conductivity of the material; each layer 6a-c comprising a plurality of teeth 2,4 disposed in a substantially common plane; the layers 6a-c being stacked such that the teeth 2,4 of adjacent wafers interleave. The filter can be tuned for frequency of stopband, width of stop band, and the frequency of a narrow transmission peak.
GB0226050A 2001-11-07 2002-11-07 Filter device Expired - Fee Related GB2381957B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0126737A GB0126737D0 (en) 2001-11-07 2001-11-07 Filter

Publications (3)

Publication Number Publication Date
GB0226050D0 GB0226050D0 (en) 2002-12-18
GB2381957A GB2381957A (en) 2003-05-14
GB2381957B true GB2381957B (en) 2004-02-11

Family

ID=9925332

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0126737A Ceased GB0126737D0 (en) 2001-11-07 2001-11-07 Filter
GB0226050A Expired - Fee Related GB2381957B (en) 2001-11-07 2002-11-07 Filter device

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0126737A Ceased GB0126737D0 (en) 2001-11-07 2001-11-07 Filter

Country Status (2)

Country Link
GB (2) GB0126737D0 (en)
WO (1) WO2003041223A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3047466A1 (en) * 1980-12-17 1982-07-22 Standard Elektrik Lorenz Ag, 7000 Stuttgart Filter with interdigitated resonators - has two metal plates forming cylindrical outer conductor with adjustable inner conductor sections

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2278021B (en) * 1990-09-07 1995-04-19 Univ Loughborough Waveguide
US5689275A (en) * 1995-05-16 1997-11-18 Georgia Tech Research Corporation Electromagnetic antenna and transmission line utilizing photonic bandgap material
FR2801428B1 (en) * 1999-11-18 2004-10-15 Centre Nat Rech Scient ANTENNA PROVIDED WITH AN ASSEMBLY OF FILTER MATERIALS
US6323826B1 (en) * 2000-03-28 2001-11-27 Hrl Laboratories, Llc Tunable-impedance spiral

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3047466A1 (en) * 1980-12-17 1982-07-22 Standard Elektrik Lorenz Ag, 7000 Stuttgart Filter with interdigitated resonators - has two metal plates forming cylindrical outer conductor with adjustable inner conductor sections

Also Published As

Publication number Publication date
GB2381957A (en) 2003-05-14
WO2003041223A1 (en) 2003-05-15
GB0126737D0 (en) 2002-01-02
GB0226050D0 (en) 2002-12-18

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Legal Events

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

Effective date: 20061107