Topic
Balun
About: Balun is a research topic. Over the lifetime, 5375 publications have been published within this topic receiving 52256 citations. The topic is also known as: Telephone balance unit.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this paper, the design of a reconflgurable antenna that resembles a monolithic UWB bow-tie antenna for ground-penetrating radar (GPR) applications is presented.
Abstract: DESIGN OF A BALUN FOR A BOW TIE ANTENNA INRECONFIGURABLE GROUND PENETRATING RADARSYSTEMSR. PersicoIstituto per il Beni Archeologici e MonumentaliConsiglio Nazionale delle RicercheVia Monteroni, Campus Universitario, Lecce 73100, ItalyN. RomanoDipartimento di Ingegneria dell’InformazioneSeconda Universitµa degli studi di NapoliVia Roma 29, Aversa 81031, ItalyF. SoldovieriIstituto per il Rilevamento Elettromagnetico dell’AmbienteConsiglio Nazionale delle RicercheVia Diocleziano 328, Napoli 80124, ItalyAbstract|This paper deals with the design of a reconflgurableantenna that resembles a monolithic UWB bow-tie antenna for GroundPenetrating Radar (GPR) applications. In particular, the attentionis focussed on the design of the balun system able to work in thefrequency band 0.3{1GHz; the efiectiveness of the design is shown byexamining the behaviour of the scattering parameters
20 citations
NEC1
TL;DR: In this paper, an L/S band high-power and low-distortion AlGaAs/GaAs heterostructure field effect transistors (FET) amplifier was developed.
Abstract: An L/S band high-power and low-distortion AlGaAs/GaAs heterostructure field-effect-transistor amplifier has been developed. The amplifier employed two pairs of prematched GaAs chips mounted on a single package, and the total output power was combined in a push-pull configuration with a low-loss microstrip balun circuit. The developed amplifier demonstrated state of-the-art performance of 140 W output power with 11.5 dB linear gain at 2.2 GHz. In addition, it exhibited extremely low distortion performance, which is suitable for digital cellular base station system applications.
20 citations
Patent•
[...]
21 Feb 2012
TL;DR: In this article, a dual-polarized antenna array with a plurality of self supporting, electrically conductive members is described, and a back cavity can be included as part of a BALUN structure.
Abstract: A dual-polarized antenna array is disclosed. The antenna array includes a plurality of self supporting, electrically conductive members. Tapered elements of neighboring electrically conductive members define tapered slots that form part of radiating structures. The radiating structures additionally include a slot line in communication with the tapered slot. A back cavity can be included as part of a BALUN structure that is integral to an electrically conductive member.
20 citations
TL;DR: In this article, a novel impedance-transforming coupled-line coupler with strong coupling coefficient is proposed for microstrip baluns, which has many advantages including planar structure without any via holes, strong coupled lines, and wide operation bandwidth.
Abstract: A novel impedance-transforming coupled-line coupler with strong coupling coefficient is proposed in this paper. Its analytical design methodology and applications to microstrip baluns are presented. For demonstration purposes, four numerical examples of this proposed impedance-transforming coupler with different terminated impedances are given. The calculated results show that this proposed coupler not only matches two different groups of terminated impedances but also covers the total power-dividing ratio range from 0 dB to infinite value. The measured results of the fabricated coupler verify the proposed design approach. Finally, this kind of coupler is used to construct a novel planar microstrip balun. This proposed balun has many advantages including planar structure without any via holes, strong coupled lines, and wide operation bandwidth. The experimental results of this proposed balun operating at approximately 2 GHz demonstrated these proposed ideas.
20 citations
TL;DR: A balanced phase shifter using coupled line with loaded transmission line is proposed, which is the first balanced passive phase shift providing both differential-mode phase shift and common-mode (CM) suppression simultaneously, and can provide (30°–90°) phase-shift range with characteristic of the wide bandwidth.
Abstract: In this paper, a balanced phase shifter using coupled line with loaded transmission line is proposed, which is the first balanced passive phase shifter providing both differential-mode (DM) phase shift and common-mode (CM) suppression simultaneously. Furthermore, the proposed design can provide (30°–90°) phase-shift range with characteristic of the wide bandwidth. Compared with single-ended phase shifters, the proposed design can be directly utilized in differential system without additional baluns. Compared with the state-of-arts balanced passive phase shifters, the proposed one shows the advantages of the CM suppression, wider bandwidth, wider alternative phase-shift range, and simpler structure. Three DM transmission poles can be obtained to support the wide bandwidth. Complete theoretical analysis and discussion are given to guide the design. To verify the theoretic prediction, three prototypes are designed with the operation bandwidth for 30° ± 2.5° (60° ± 4.2° and 90° ± 5.5°) of 68% (70% and 73%), with the minimum insertion of 0.2 dB (0.15 dB and 0.27 dB), with the CM suppression better than 10 dB, and with the minimum return loss of 17.8 dB (18.5 dB and 15.1 dB), respectively.
20 citations