TY - JOUR AU - Piltyay, S. I. PY - 2014/10/01 Y2 - 2024/03/28 TI - Enhanced C-band Coaxial Orthomode Transducer JF - Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia JA - RADAP VL - 0 IS - 58 SE - DO - 10.20535/RADAP.2014.58.27-34 UR - https://radap.kpi.ua/radiotechnique/article/view/765 SP - 27-34 AB - <span style="text-decoration: underline;">Introduction</span>. In this paper a novel configuration of wideband coherent coaxial OMT is presented.<br /> General Design of an Orthomode Transducer. The OMT consists of elements of 3 main types: a turnstile junction between coaxial quad-ridged waveguide and 4 coaxial transmission lines; 4 coaxial transmission lines of LMR400 type; 2 antiphase power combiners/dividers.<br /> <span style="text-decoration: underline;">A Turnstile Junction Optimization</span>. The optimization of a turnstile junction has been performed. Its minimized reflection coefficient is less than −28 dB in the operation frequency band 3.4–5.4 GHz.<br /> <span style="text-decoration: underline;">A Wideband Antiphase Power Combiner/Divider</span>. The optimization of an antiphase power combiner/divider has been performed. Its minimized reflection coefficient is less than −38 dB. Characteristics of Coaxial Orthomode Transducer Developed. The simulation of OMT characteristics has been performed using CST Design Studio software.<br /> <span style="text-decoration: underline;">Conclusions</span>. A wideband coherent coaxial orthomode transducer has been developed for the operation frequency band 3.4–5.4 GHz. In this frequency band the reflection coefficient of OMT is less than −24 dB and its crosspolar isolation exceeds 38 dB. The wideband coaxial OMT developed can be used in dual-polarized multiband antennas for satellite telecommunications and for radioastronomy. ER -