A Broadband W-band Orthomode Transducer for KVN Polarization Observations
A W-band Orthomode Transducer (OMT) has been developed for Korean VLBI Network (KVN) polarization observation. The OMT design was based on E-plane split-block technique using septum structure. 3-dimensional electromagnetic simulation was fully employed to optimize the performance of the OMT. Measu...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
The Korean Space Science Society
2013-12-01
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| Series: | Journal of Astronomy and Space Sciences |
| Subjects: | |
| Online Access: | http://ocean.kisti.re.kr/downfile/volume/kosss/OJOOBS/2013/v30n4/OJOOBS_2013_v30n4_345.pdf |
| Summary: | A W-band Orthomode Transducer (OMT) has been developed for Korean VLBI Network (KVN) polarization observation. The
OMT design was based on E-plane split-block technique using septum structure. 3-dimensional electromagnetic simulation
was fully employed to optimize the performance of the OMT. Measurements of the fabricated OMT show that the return losses
for the vertically and horizontally polarized modes are better than -20 dB across 80 ~ 108 GHz and the insertion losses for the
both modes are less than 0.47 dB. The cross-polarization level of the OMT is less than -30 dB. The bandwidth of the developed
OMT is estimated as around 30%. |
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| ISSN: | 2093-5587 2093-1409 |