Engineering topics
Choi, Thomas
Publications and source records attributed to Choi, Thomas.
Statistical ARQ Link Analysis and Planning for Dynamic Links
In this paper we incorporate the effect of changing SNR, or link uncertainty, into the analysis of ARQ links.
Inflatable Antenna for CubeSats: Development of the X-Band Prototype
No abstract available
Inflatable Antenna for CubeSat: Extension of the Previously Developed S-Band Design to the X-Band
The inflatable antenna for CubeSat is a 1 meter antenna reflector designed with one side reflective Mylar, another side clear Mylar with a patch antenna at the focus. The development of this technology responds to the increasing need for more capable communication systems to allow CubeSats to operate autonomously in interplanetary missions. An initial version of the antenna for the S-Band was developed and tested in both anechoic chamber and vacuum chamber. Recent developments in transceivers and amplifiers for CubeSat at X-band motivated the extension from the S-Band to the X-Band. This paper describes the process of extending the design of the antenna to the X-Band focusing on patch antenna redesign, new manufacturing challenges and initial results of experimental tests.