Full-wave design of broad-band compact waveguide step-twists

Baralis, M.; Tascone, R.; Olivieri, A.; Peverini, O. A.; Virone, G.; Orta, Renato

doi:10.1109/lmwc.2004.842865

Cited by 31 publications

(10 citation statements)

References 8 publications

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“…Contrary to the geometries described in [4,6], in the proposed ones the waveguide is neither rectangular nor circular. The cross-section is similar to the rectangular one, but its electromagnetic behavior is different.…”

mentioning

confidence: 86%

“…The circular waveguides are used in order that the reflection coefficient S 11 will be the minimum possible and therefore the performance will be improved. Finally, in [6] the same problem is addressed in a similar way by eliminating the waveguides of circular cross-sections, i.e., the component consists of rectangular waveguides of the same crosssection, which are also rotated on the same axis.…”

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confidence: 99%

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Optimized 90° Polarization Shift Step Twists for Ku, K and Ka Bands

Salis

Mallios

Tigelis

et al. 2007

Int J Infrared Milli Waves

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Optimized models for 90°polarization shift step twists for Ku, K and Ka bands are presented. The cross-section of the waveguide employed is similar to that of a rectangular one, with the difference that the walls of the shorter side are part of a circular one with the proper diameter. The optimized models have been found using the CST Microwave Studio simulation tool and in all cases the return loss is kept below -20 dB for a wide range of frequency spectrum. Two examples are given, one for Ku band and the other for K and Ka ones.

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mentioning

confidence: 86%

mentioning

confidence: 99%

Optimized 90° Polarization Shift Step Twists for Ku, K and Ka Bands

Salis

Mallios

Tigelis

et al. 2007

Int J Infrared Milli Waves

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show abstract

“…The two waveguides exhibits a perpendicular orientation. However, the step-twist reported in [8] could be applied to obtain a parallel orientation.…”

Section: Omt Configurationmentioning

confidence: 99%

Platelet Ortho-mode Transducer (OMT) for millimeter-wave applications

Virone

Peverini

Addamo

et al. 2013

2013 International Conference on Electromagnetics in Advanced Applications (ICEAA)

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This contribution presents a manufacturingorientedOrtho-mode Transducer configuration for polarimeter clusters at millimeter-waves. It is based on a turnstile junction with a proper recombination network. All the discontinuities were properly conceived so that the overall geometry can be manufactured in a multi-layer (platelet) fashion, using commercially-available metal layers. All the metal layers can be machined using the spark-erosion technique, which provides high accuracy and high repeatability for a large number of devices. A W-band implementation with standard WR10 output waveguides has been designed in the operative bandwidth 80-108 GHz. The simulated return loss is better than 25 dB in the overall bandwidth for both polarizations. The predicted insertion loss is 0.35 dB at 94 GHz (metal resistivity 10 cm). The isolation between the two polarizations is better than 60 dB owing to the symmetry of the device.

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“…In [4], a circular waveguide is inserted into two adjacent steps to improve impedance bandwidth. Multiple rectangular steps are used to achieve arbitrary polarization rotation in [7][8][9][10]. The step twists presented in [7] can provide a 40-dB returnloss level bandwidth of 40% with its longitudinal length equal to 1.86 waveguide width.…”

Section: Introductionmentioning

confidence: 99%

“…Multiple rectangular steps are used to achieve arbitrary polarization rotation in [7][8][9][10]. The step twists presented in [7] can provide a 40-dB returnloss level bandwidth of 40% with its longitudinal length equal to 1.86 waveguide width. A single step twist consists of double-corner-cut square waveguide in [11] can form extremely short twists (about 0.296 waveguide width) while showing relatively broad bandwidth (31% at the 30-dB return-loss level).…”

Section: Introductionmentioning

confidence: 99%

Design of a Compact Broadband 90° Waveguide Twist Based on Double-Corner-Cut Square Slots

Zhou

Lei

et al. 2017

International Journal of Antennas and Propagation

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A new compact broadband waveguide twist by double-corner-cut square slots is presented. In particular, the proposed module is made from two substrate layers and three copper cladding layers, which can be used as the waveguide twist and broadband filter. A double-corner-cut square slot is etched on each metal layer with relative rotation. It is found that the optimized module can provide the bandwidths of no less than 6.1% at the 10-dB return-loss level or 4.3% at the 20-dB level with a minimum length of 0.07 waveguide width.

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Full-wave design of broad-band compact waveguide step-twists

Cited by 31 publications

References 8 publications

Optimized 90° Polarization Shift Step Twists for Ku, K and Ka Bands

Optimized 90° Polarization Shift Step Twists for Ku, K and Ka Bands

Platelet Ortho-mode Transducer (OMT) for millimeter-wave applications

Design of a Compact Broadband 90° Waveguide Twist Based on Double-Corner-Cut Square Slots

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