Accession Number:

ADA088923

Title:

Synthesis Methods Applicable to SEM Pole-Pair Admittances.

Descriptive Note:

Research rept.,

Corporate Author:

KENTUCKY UNIV LEXINGTON DEPT OF ELECTRICAL ENGINEERING

Report Date:

1979-12-01

Pagination or Media Count:

121.0

Abstract:

THE APPLICABILITY OF THE FIRST LAYER CONJUGATE POLE PAIR AT A TIME EQUIVALENT CIRCUIT SYNTHESIS FOR ENERGY COLLECTING STRUCTURES IS CONSIDERED. It is found that, at least for some highly resonant structures, the whole eigenset of poles can be approximately represented by the first layer dominant pole. The driving point admittance function can then be synthesized in the form of a parallel connection of simple pole-pair modules. the biquadratic functions corresponding to each conjugate pole pair are, in general, not positive real and thus physically realizable. The explicit form of this network, as well as Brune and Darlington network, is derived. It is demonstrated that the Darlington network reduces to Brune network or, if surplus factors are used, to Bott-Duffin network. The Miyata procedure is not applicable to minimum biquadratics. After further approximation the Bott-Duffin network can be reduced to simple four element structure which has been shown to give favorable results for the thin wire dipole and loop antennas. It is demonstrated that the equivalent networks derived are very sensitive to changes in element values. This and the influence of the parasitic effects associated with real circuit elements can unfavorably affect the practicability of the derived networks, should they be constructed.

Subject Categories:

  • Electrical and Electronic Equipment
  • Numerical Mathematics
  • Computer Programming and Software
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE