Lumped-Element Balun for UHF UWB Printed Balanced Antennas

González Posadas, Vicente and Martín Pascual, Carlos and Jiménez Martín, José Luis and Segovia Vargas, Daniel (2008). Lumped-Element Balun for UHF UWB Printed Balanced Antennas. "IEEE Transactions on Antennas and Propagation", v. 56 (n. 7); pp. 2102-2107. ISSN 0018-926X. https://doi.org/10.1109/TAP.2008.924769.

Description

Title: Lumped-Element Balun for UHF UWB Printed Balanced Antennas
Author/s:
  • González Posadas, Vicente
  • Martín Pascual, Carlos
  • Jiménez Martín, José Luis
  • Segovia Vargas, Daniel
Item Type: Article
Título de Revista/Publicación: IEEE Transactions on Antennas and Propagation
Date: July 2008
ISSN: 0018-926X
Volume: 56
Subjects:
Freetext Keywords: UHF UWB printed balanced antennas asymmetric filters binomial impedance transformer dipole antennas high pass filter low pass filter lumped-element balun semilumped balun transformer source impedance variable antenna impedance variable balanced dipole impedance
Faculty: E.U.I.T. Telecomunicación (UPM)
Department: Ingeniería Audiovisual y Comunicaciones [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A semi-lumped balun transformer for UHF and ultrawideband (UWB) dipole antennas is presented in this paper. The proposed structure is based on two asymmetric filters that also transform the variable antenna impedance into the desired source impedance. These asymmetric filters make use of a binomial impedance transformer in each filter section. The asymmetric filters (one low pass filter, LPF, and other high pass filter, HPF) allow the balun bandwidth to be increased while the binomial transformer matches the variable balanced dipole impedance. In this way the ripple in the balun response due to the variation of the UWB dipole impedance is reduced. A balun for a UHF and UWB dipole antenna working from 220 to 820 MHz (bandwidth of 4:1) has been achieved with losses lower than 1 dB. These types of baluns are particularly useful in the low microwave frequency band.

More information

Item ID: 2025
DC Identifier: http://oa.upm.es/2025/
OAI Identifier: oai:oa.upm.es:2025
DOI: 10.1109/TAP.2008.924769
Official URL: http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=4558298&tag=1
Deposited by: Memoria Investigacion
Deposited on: 22 Dec 2009 08:33
Last Modified: 20 Apr 2016 11:49
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