Full-Wave Analysis and Design of Broadband Turnstile Junctions

San-Blas, Angel-Antonio; Pérez, Francisco José Alfaro; Gil, J.; Mira, F.; Boria, Vicente E.; Martinez, and Benito Gimeno

doi:10.2528/pierl11051703

Cited by 9 publications

(3 citation statements)

References 11 publications

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“…Regarding the input matching of the turnstile junction, very good performance has been achieved using two cylinders (Fig. 5) which keep the structure's symmetry [12], but square [13] or other geometries [14] or a third or fourth cylinder in the turnstile junction [15] can also be adopted. The convenient choice among alternative geometries mainly depends upon mechanical manufacturing process.…”

Section: Designmentioning

confidence: 99%

Design of Two Ku-Band Orthomode Transducers for Radio Astronomy Applications

Nesti¹,

Pelosi²,

Selleri³

2018

PIER

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Two different designs of orthomode transducers for the coming Ku-band receiver of the Italian radio telescope in Medicina are presented and compared, showing design details, describing numerical simulations and discussing manufacturing and test results. Such orthomode transducers provide a tradeoff between low-loss and phase-matching, according to different initial requirements where the final receiver architecture has to be frozen. Both designs show high performance over the operative 13.5-18.1 GHz Ku-band. One of the OMT designs has been fabricated and tested, showing results in very good agreement with simulations.

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Section: Designmentioning

confidence: 99%

Design of Two Ku-Band Orthomode Transducers for Radio Astronomy Applications

Nesti¹,

Pelosi²,

Selleri³

2018

PIER

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“…With the ever-increasing expectations imposed on modern-day circuits, however, microwave designers may nowadays have to seek recourse to novel components with five or more ports [4][5][6] in order to meet more complex functional requirements. In particular, various six-port components [7][8][9][10][11][12][13] have already been attracting the attention of researchers who utilized a diversity of numerical techniques to develop computer models for predicting their performance characteristics.…”

Section: Introductionmentioning

confidence: 99%

Symmetrical Six-Port Waveguide Junction With Metallic Post and Dielectric Sleeve in Over-Sized Cavity

Sabahialshoara¹,

Yeo²

2013

PIER B

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Abstract-The Least-Squares Boundary Residual Method is employed in the present paper to develop a computer model of the symmetrical six-port waveguide junction. The analytical formulation is difficult because of the insertion of a metallic post together with a dielectric sleeve into the over-sized cavity of the junction. Computational and experimental tests confirm that the resultant model is able to compute the scattering parameters of such a structurally-complicated component with numerical accuracies of ±0.001 and ±0.1 • for magnitude and phase respectively.

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“…Several design variants of OMT are described by different researchers [1][2][3][4][5][6] that include slot-coupled branching OMT with stepped transformer, slot-coupled branching OMT with continuous taper function, slot-coupled septum branching OMT, probe-coupled OMT with taper transformer, probe-coupled septum branching OMT, OMT with short plate etc..…”

Section: Introductionmentioning

confidence: 99%

Compact and High Performance Stepped Truncated-Circular Waveguide Branching Ortho-Mode Transducer (Stcwb-Omt)

Gupta¹,

Sood²,

Jyoti³

2011

PIER Letters

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This paper reports design and development of an innovative compact Stepped Truncated-Circular Waveguide Branching Ortho-Mode Transducer (STCWB-OMT) operating at 4.5-4.8 GHz for horizontal and vertical polarizations. STCWB-OMT is derived by introducing branch waveguide via coupling slot on a stepped truncatedcircular waveguide. This configuration possesses inbuilt rectangularto-circular transition; therefore it does not require any additional square-to-circular transition to combine it with horn antenna. The challenge in the design incorporated is to obtain a mechanically compact design with low mass while compliant with the specified electrical performances; since this device is developed for space-borne application. Achieved return losses at both direct and coupled ports are > 17 dB, insertion losses < 0.08 dB for both polarizations, isolation is < −60 dB and cross-polarization discrimination > 40 dB with the OMT length = 1.98λ at center frequency and weight = 250 gm The agreement between measured and computed results provides a validation of the proposed OMT configuration.

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Full-Wave Analysis and Design of Broadband Turnstile Junctions

Cited by 9 publications

References 11 publications

Design of Two Ku-Band Orthomode Transducers for Radio Astronomy Applications

Design of Two Ku-Band Orthomode Transducers for Radio Astronomy Applications

Symmetrical Six-Port Waveguide Junction With Metallic Post and Dielectric Sleeve in Over-Sized Cavity

Compact and High Performance Stepped Truncated-Circular Waveguide Branching Ortho-Mode Transducer (Stcwb-Omt)

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