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Final published version
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| Publication date | 4/10/2017 |
|---|---|
| Host publication | 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 1746-1749 |
| Number of pages | 4 |
| ISBN (electronic) | 9781509063604 |
| <mark>Original language</mark> | English |
| Event | 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 - Honololu, United States Duration: 4/06/2017 → 9/06/2017 |
| Conference | 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 |
|---|---|
| Country/Territory | United States |
| City | Honololu |
| Period | 4/06/17 → 9/06/17 |
| Conference | 2017 IEEE MTT-S International Microwave Symposium, IMS 2017 |
|---|---|
| Country/Territory | United States |
| City | Honololu |
| Period | 4/06/17 → 9/06/17 |
This paper presents an active UHF transponder designed for geological monitoring of boreholes drilled through ice sheets. It forms part of a phase-sensitive frequency modulated continuous wave (FMCW) radar system to measure the horizontal position of a borehole with depth. To distinguish the transponder response from stationary clutter, the transponder modulates the received signal before re-transmission to the surface radars. The transponder operates from 292 to 492 MHz with a gain around 18 dB. The transponder employs two novel antennas optimized for deployment within a 15 cm diameter borehole. The simulation and indoor laboratory measurement results of the transponder design are presented.