Transfer Operator Theory and Inter-Reciprocity of Non-Reciprocal Multiport Antennas.
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| Title: | Transfer Operator Theory and Inter-Reciprocity of Non-Reciprocal Multiport Antennas. |
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| Authors: | Macher, Wolfgang1 wolfgang.macher@oeaw.ac.at |
| Source: | Progress in Electromagnetics Research B. 2014, Vol. 60, p169-193. 25p. |
| Subjects: | Transfer operators, Waveguides, Magnetoelectric effect, Plane wavefronts, Anisotropy |
| Abstract: | The present article expounds a formalism for the representation of multi-port non-reciprocal antenna structures in an arbitrary surrounding linear medium. In the most general approach the antenna, the waveguides connected to it, as well as the surrounding medium may contain any distribution of anisotropic magneto-electric media. Furthermore, an arbitrary external field is taken into consideration which need not be of plane wave form. A reciprocally adjoint system is introduced to derive relations which describe the antenna under such general conditions. Since the antenna may contain media which prohibit the use of ordinary scattering, admittance or impedance matrices, an approach by means of generalized scattering matrices, or by a generalized admittance and a generalized impedance matrix, is applied. This leads to an n-port description of the whole waveguide-antenna-environment where transfer operators render the interaction between the external field and the state of the ports. These operators are the generalizations of effective length vectors. For its importance the case of reciprocal reflection-symmetric waveguides is treated in detail, including a derivation of the consequences of abstract network reciprocity and complex power relation for voltage-current representations. The formalism is adequate for the description of radar and radio astronomy antennas, in particular when wave polarization plays a crucial role and/or a magnetized plasma environment is present (which is responsible for anisotropy and non-reciprocal conditions). [ABSTRACT FROM AUTHOR] |
| Copyright of Progress in Electromagnetics Research B is the property of Electromagnetics Academy and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Links: – Type: pdflink Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 108389101 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Transfer Operator Theory and Inter-Reciprocity of Non-Reciprocal Multiport Antennas. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Macher%2C+Wolfgang%22">Macher, Wolfgang</searchLink><relatesTo>1</relatesTo><i> wolfgang.macher@oeaw.ac.at</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Progress+in+Electromagnetics+Research+B%22">Progress in Electromagnetics Research B</searchLink>. 2014, Vol. 60, p169-193. 25p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Transfer+operators%22">Transfer operators</searchLink><br /><searchLink fieldCode="DE" term="%22Waveguides%22">Waveguides</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetoelectric+effect%22">Magnetoelectric effect</searchLink><br /><searchLink fieldCode="DE" term="%22Plane+wavefronts%22">Plane wavefronts</searchLink><br /><searchLink fieldCode="DE" term="%22Anisotropy%22">Anisotropy</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: The present article expounds a formalism for the representation of multi-port non-reciprocal antenna structures in an arbitrary surrounding linear medium. In the most general approach the antenna, the waveguides connected to it, as well as the surrounding medium may contain any distribution of anisotropic magneto-electric media. Furthermore, an arbitrary external field is taken into consideration which need not be of plane wave form. A reciprocally adjoint system is introduced to derive relations which describe the antenna under such general conditions. Since the antenna may contain media which prohibit the use of ordinary scattering, admittance or impedance matrices, an approach by means of generalized scattering matrices, or by a generalized admittance and a generalized impedance matrix, is applied. This leads to an n-port description of the whole waveguide-antenna-environment where transfer operators render the interaction between the external field and the state of the ports. These operators are the generalizations of effective length vectors. For its importance the case of reciprocal reflection-symmetric waveguides is treated in detail, including a derivation of the consequences of abstract network reciprocity and complex power relation for voltage-current representations. The formalism is adequate for the description of radar and radio astronomy antennas, in particular when wave polarization plays a crucial role and/or a magnetized plasma environment is present (which is responsible for anisotropy and non-reciprocal conditions). [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Progress in Electromagnetics Research B is the property of Electromagnetics Academy and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.2528/pierb14051401 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 25 StartPage: 169 Subjects: – SubjectFull: Transfer operators Type: general – SubjectFull: Waveguides Type: general – SubjectFull: Magnetoelectric effect Type: general – SubjectFull: Plane wavefronts Type: general – SubjectFull: Anisotropy Type: general Titles: – TitleFull: Transfer Operator Theory and Inter-Reciprocity of Non-Reciprocal Multiport Antennas. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Macher, Wolfgang IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 06 Text: 2014 Type: published Y: 2014 Identifiers: – Type: issn-print Value: 19376472 Numbering: – Type: volume Value: 60 Titles: – TitleFull: Progress in Electromagnetics Research B Type: main |
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