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

Nesti, R.; Pelosi, Giuseppe; Selleri, Stefano

doi:10.2528/pier18062002

Cited by 1 publication

(1 citation statement)

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“…The resulting compact design has both output ports pointing in the same direction, facilitating interfacing with a circuit board, unlike the similar but more complex since-published ''Swan Neck'' design [9]. It is also simpler and more compact and symmetric than the similar Ku band designs recently presented in [10]. The full geometry and functionality are illustrated in Fig.…”

Section: Full Waveguide Turnstile-based Omtmentioning

confidence: 99%

Broadband, High Efficiency OMT in E-Band

Sage

Nantista

2022

IEEE Access

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A high-performance, broadband E-Band orthomode transducer (OMT) was designed and fabricated for a dedicated frequency converter. Cross-polarized signals between 71 and 86 GHz, received in a TE 11 mode circular waveguide needed to be split into separate horizontal and vertical polarization channels. The purpose of the OMT is to service the 71−76 and 81−86 GHz licensed communication bands. The main goal of OMT design is maximized transmission across the design bandwidth. Every fraction of a dB lost before the first low noise amplifier is a direct loss in SNR for the overall system. Several different design approaches were simulated, and several OMT's and ancillary components were built and tested. In the end, practical limitations determined the final path of the completed device. The final product performed several tenths of a dB better than commercially available devices and better than most reported in academic literature. Lessons learned included which construction techniques worked and did not work, as well as what compromises are acceptable.

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Section: Full Waveguide Turnstile-based Omtmentioning

confidence: 99%