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Design of Wideband Quadruple-Ridged Flared Horn Feeds for Future Radio Telescopes

Marianna Ivashina (Institutionen för signaler och system, Antennsystem) ; Theunis Beukman ; Carlo Bencivenni (Institutionen för signaler och system, Antennsystem) ; Oleg Iupikov (Institutionen för signaler och system, Antennsystem) ; Rob Maaskant (Institutionen för signaler och system, Antennsystem) ; Petrie Meyer ; Miroslav Pantaleev (Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium)
Swedish Microwave Days March 11-12, 2014, Gothenburg, Sweden (2014)
[Konferensbidrag, refereegranskat]

Balanced excitations are required to achieve ultra wideband performance with the novel reflector antenna feeds consisting of pair(s) of interleaved spiral, log-periodical or other travelling-wave structures, which are currently being developed for radio astronomic instruments [1]–[3]. This excitation is commonly realized by using a balun interfacing the balanced antenna to single-ended amplifiers. However, practical designs of such passive networks are often bulky and lead to power dissipation losses. Power dissipation reduces the antenna radiation efficiency and increases the system thermal noise temperature. Another limiting factor is that the ultra wideband balun design restricts the reference impedance for the optimum noise matching between the antennas and low-noise amplifiers (LNAs). To obviate these disadvantages, differential low-noise amplifiers (dLNA), which can be directly integrated at the antenna terminals, represent an interesting alternative solution.

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Denna post skapades 2016-12-11. Senast ändrad 2017-06-28.
CPL Pubid: 246040


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Institutioner (Chalmers)

Institutionen för signaler och system, Antennsystem (2014-2017)
Institutionen för rymd- och geovetenskap, Onsala rymdobservatorium (2010-2017)


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