Abstract
We report on the construction and test results of a waveguide Orthomode Transducer (OMT) for the 385-500 GHz band. The OMT is based on a symmetric reversecoupling structure and consists of two copper alloy blocks in split-block configuration fabricated using numerically controlled (CNC) milling machining. Test results of a first prototype OMT employing standard UG387 flanges at all ports were described at the previous ISSTT Symposium. Here, we report on experimental results of a second OMT version utilizing custom made mini-flanges and much shorter input and output waveguides. This second OMT version is tolerant to misalignment errors of the block halves, has improved performance over the first prototype, and covers a wider band than initially specified. From 325 to 500 GHz the measured input reflection coefficient of the second prototype OMT was less than -10 dB, the transmission was ≈-1 dB, and the isolation was less than -30 dB at room temperature for both polarization channels.
| Original language | English (US) |
|---|---|
| Title of host publication | 22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011 |
| Publisher | International Symposium on Space Terahertz Technology |
| Pages | 99-102 |
| Number of pages | 4 |
| State | Published - 2011 |
| Event | 22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011 - Tucson, AZ, United States Duration: Apr 25 2011 → Apr 28 2011 |
Other
| Other | 22nd International Symposium on Space Terahertz Technology 2011, ISSTT 2011 |
|---|---|
| Country/Territory | United States |
| City | Tucson, AZ |
| Period | 4/25/11 → 4/28/11 |
Keywords
- Orthomode transducer
- Polarization splitter
- Reverse coupling structure
- Waveguide components
ASJC Scopus subject areas
- Computer Networks and Communications
- Space and Planetary Science
- Electrical and Electronic Engineering
- Atomic and Molecular Physics, and Optics
- Radiation