Approaching the Lower Bounds on Q for Electrically Small Electric-Dipole Antennas Using High Permeability Shells
We study the effect of surrounding electrically small, top-loaded, electric-dipole antennas with a thin shell of high-permeability magnetic material. The magnetic polarization currents induced in the thin shell of magnetic material reduce the internal stored energy, resulting in a lower as compared...
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| Veröffentlicht in: | IEEE transactions on antennas and propagation 2010-12, Vol.58 (12), p.3865-3872 |
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| container_title | IEEE transactions on antennas and propagation |
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| creator | Stuart, H R Yaghjian, A D |
| description | We study the effect of surrounding electrically small, top-loaded, electric-dipole antennas with a thin shell of high-permeability magnetic material. The magnetic polarization currents induced in the thin shell of magnetic material reduce the internal stored energy, resulting in a lower as compared to conventional designs. The simulated 's of thin-magnetic-shell cylindrical and spherical antennas are compared to recently derived lower bounds on . The high permeability shells reduce the of these antennas to values below the lower bounds for purely global electric current sources. In the case of the spherical electric-dipole antenna, a sufficiently large value of permeability enables the to be reduced to a value that is only 1.11 times the Chu lower bound. |
| doi_str_mv | 10.1109/TAP.2010.2078466 |
| format | Article |
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In the case of the spherical electric-dipole antenna, a sufficiently large value of permeability enables the to be reduced to a value that is only 1.11 times the Chu lower bound.</description><subject>Antennas</subject><subject>Applied sciences</subject><subject>Current</subject><subject>Dipole antennas</subject><subject>electrically small antennas</subject><subject>Exact sciences and technology</subject><subject>Internal energy</subject><subject>Lower bounds</subject><subject>Magnetic materials</subject><subject>Magnetic permeability</subject><subject>Magnetic resonance</subject><subject>Mathematical model</subject><subject>Permeability</subject><subject>quality factor</subject><subject>Radiocommunications</subject><subject>Shells</subject><subject>Telecommunications</subject><subject>Telecommunications and information theory</subject><subject>Thin walled shells</subject><issn>0018-926X</issn><issn>1558-2221</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkc1LJDEQxYMoOLrehb0EFvHUbr46nT6OX-vCgIoK3poYK06kJ2mTHsT_3hpmmIOnolK_96jKI-SYszPOWfv3cXp3Jhh2gjVGab1DJryuTSWE4Ltkwhg3VSv08z45KOUdW2WUmpBhOgw5WTcP8Y2Oc6Cz9AmZnqdlfC00RXpPfcr0qgc35uBs33_RhwWW7VN1GYbUA53GEWK0hT6VlddNeJvTO8gLsC-hDyPK5tD35RfZ87YvcLSph-Tp-urx4qaa3f77fzGdVU7Wcqygbby2HDzUTHArbaM5t1y8GAXSKi69dlY5CdrLVshaWKVbjrcrIZHz8pCcrn3xvI8llLFbhOJwAxshLUtnVKua1hiG5J8f5Hta5ojLdZxJxhtpRIMUW1Mup1Iy-G7IYWHzF0LdKoEOE-hWCXSbBFBysjG2BX_OZxtdKFudkA2vJTPI_V5zAQC2YwxPiFrLb44ojbM</recordid><startdate>20101201</startdate><enddate>20101201</enddate><creator>Stuart, H R</creator><creator>Yaghjian, A D</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. 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| ispartof | IEEE transactions on antennas and propagation, 2010-12, Vol.58 (12), p.3865-3872 |
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| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Antennas Applied sciences Current Dipole antennas electrically small antennas Exact sciences and technology Internal energy Lower bounds Magnetic materials Magnetic permeability Magnetic resonance Mathematical model Permeability quality factor Radiocommunications Shells Telecommunications Telecommunications and information theory Thin walled shells |
| title | Approaching the Lower Bounds on Q for Electrically Small Electric-Dipole Antennas Using High Permeability Shells |
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