Development of Advanced Design Software for Complex Multimode Antenna Feeding Systems

Uher, J.; Richard, Sylvain; Beyer, Ralf; Sieverding, Thomas; Sarasa, P.

doi:10.1109/map.2011.6157715

Cited by 3 publications

(4 citation statements)

References 10 publications

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“…4 are a classical turnstile junction and two OMT-septa for each band. These elements, depending on the application, the volume assigned to the complete antenna feeder, and the electric requirements (fractional bandwidth of the single bands, return loss, isolations, axial ratio, etc) can be replaced by an OMT plus polariser, E-or H-plane dividers with 90°p hase shifters in the combining arms, 90°hybrid coupler, a magic T-junction or a proper combination of these elements [6][7][8][9]. Regardless of the specific selected components, the key idea is that they must deal in a single-band with the 90°p…”

Section: Dual-polarisation Diplexer Within the Antenna Feedermentioning

confidence: 99%

“…The presented results have been obtained by using accurate full-wave electromagnetic simulators. Several software packages are available for this type of problems and they are nowadays very competitive [7,15]. The responses for the complete structures obtained in this paper have been computed using CST and HFSS [16,17].…”

Section: Ka-band Dual-polarisation Diplexer Based On the Internal Appmentioning

confidence: 99%

“…When the separation between the sub-bands is very large, this scheme requires a rather complex hardware. This paper is focused on an alternative scheme, based on making the frequency discrimination just after the dual-band dual-polarisation antenna [6][7][8][9]. The advantage of this approach is that the OMT and/or the devices dealing with the polarisation, must work only in each sub-band of the problem, not in both bands simultaneously.…”

Section: Introductionmentioning

confidence: 99%

“…The dual-polarisation diplexers can be made by means of ortho-mode junctions (OMJ) [1,6,7,10]. Although the OMJs using turnstile junctions [11,12] have been studied since many years, the technical literature in this subject is not as complete as for other antenna feed components.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Modelling of dual‐polarisation diplexers based on enhanced multiport turnstile junctions

Montejo‐Garai¹,

Ruiz‐Cruz

Leal-Sevillano³

et al. 2013

IET Microwaves, Antennas & Propagation

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The modelling of waveguide diplexers working simultaneously with two dual-polarisation signals is presented in this study. The proposed network is an ortho-mode junction with six physical ports based on an enhanced multiport turnstile junction. This structure is excited at the common port coming from the antenna, by two signals at different frequency bands which are required to be discriminated into dedicated ports. The added functionality of the structure presented in this work is that each frequency band can also allocate two orthogonal polarisations (dual linear or dual circular) with a very large separation between bands (fractional bandwidth larger than 55%), using two different waveguiding concepts. The first one is based on confining the high frequencies at the centre of the axial path. The second one is just the dual, diverting the high frequencies to the outer boundaries of the axial path. The proposed structures, whose modelling and design will be addressed, are suited for low insertion loss and high-power applications, since they do not use metallic pins, irises or small waveguide sections. Moreover, as consequence of the introduced waveguiding concepts, they are very compact and short in the axial direction, which is crucial for this type of feeders in satellite applications.

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Section: Dual-polarisation Diplexer Within the Antenna Feedermentioning

confidence: 99%

Section: Ka-band Dual-polarisation Diplexer Based On the Internal Appmentioning

confidence: 99%