GB201208008D0 - A reconfigurable electromagnetic band gap impedance surface - Google Patents
A reconfigurable electromagnetic band gap impedance surfaceInfo
- Publication number
- GB201208008D0 GB201208008D0 GB201208008A GB201208008A GB201208008D0 GB 201208008 D0 GB201208008 D0 GB 201208008D0 GB 201208008 A GB201208008 A GB 201208008A GB 201208008 A GB201208008 A GB 201208008A GB 201208008 D0 GB201208008 D0 GB 201208008D0
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductors
- impedances
- impedance
- load
- electrically
- 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.)
- Withdrawn
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
- H01Q15/006—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces
- H01Q15/0066—Selective devices having photonic band gap materials or materials of which the material properties are frequency dependent, e.g. perforated substrates, high-impedance surfaces said selective devices being reconfigurable, tunable or controllable, e.g. using switches
Abstract
A reconfigurable electromagnetic band gap (EBG) impedance surface comprises a plurality of conductive patches Pal - Pa6 disposed as an array above a ground plane GP with conductive pipes Pi1 Pi6 extending from respective patches. Conductors C1 C6 are arranged to extend into each respective conductive pipe Pi1 Pi6 without any direct connection to the pipe. Load impedances Za1 Za6, Zb1 Zb6 are provided for connection to the conductors C1-C6 such that the load impedance to at least one of the conductors can be independently adjusted in value relative to that of at least one of the other conductors. The values of the impedances are varied electrically, for example by electrically switching between different load impedances using switching circuitry SW1 SW6, and/or by electrically controlling a variable load impedance using varying circuitry. The load impedances may be capacitive and/or inductive and/or resistive, LC resonators, open circuit or short circuit terminations. Circuit board and dielectric materials may be used in the construction of the impedance surface. Some surface elements may be switched to an antenna feed AF3, AF4 and are able to send and/or receive radio frequency signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201208008A GB2501881A (en) | 2012-05-08 | 2012-05-08 | A reconfigurable electromagnetic band gap impedance surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB201208008A GB2501881A (en) | 2012-05-08 | 2012-05-08 | A reconfigurable electromagnetic band gap impedance surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201208008D0 true GB201208008D0 (en) | 2012-06-20 |
| GB2501881A GB2501881A (en) | 2013-11-13 |
Family
ID=46396665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB201208008A Withdrawn GB2501881A (en) | 2012-05-08 | 2012-05-08 | A reconfigurable electromagnetic band gap impedance surface |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2501881A (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6917343B2 (en) * | 2001-09-19 | 2005-07-12 | Titan Aerospace Electronics Division | Broadband antennas over electronically reconfigurable artificial magnetic conductor surfaces |
| AU2002357021A1 (en) * | 2001-11-27 | 2003-06-10 | Sciperio, Inc. | Multiband or broadband frequency selective surface cross-reference to related applications |
| US6806846B1 (en) * | 2003-01-30 | 2004-10-19 | Rockwell Collins | Frequency agile material-based reflectarray antenna |
| US7420524B2 (en) * | 2003-04-11 | 2008-09-02 | The Penn State Research Foundation | Pixelized frequency selective surfaces for reconfigurable artificial magnetically conducting ground planes |
| US7683854B2 (en) * | 2006-02-09 | 2010-03-23 | Raytheon Company | Tunable impedance surface and method for fabricating a tunable impedance surface |
| WO2010142946A1 (en) * | 2009-06-09 | 2010-12-16 | The Secretary Of State For Defence | An electrically small ultra-wideband antenna for mobile handsets and computer networks |
-
2012
- 2012-05-08 GB GB201208008A patent/GB2501881A/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
|---|---|
| GB2501881A (en) | 2013-11-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |