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Design and development of vhf antennas for space borne signal of opportunity receivers for cubesat platforms
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Deshpande, Manohar Piepmeier, Jeffrey |
| Copyright Year | 2015 |
| Description | Design and Development of VHF Antennas for Space Borne Signal of Opportunity Receivers for Cubesat Platforms. Space borne microwave remote sensors at VHF/UHF frequencies are important instruments to observe reflective properties of land surfaces through thick and heavy forestation on a global scale. One of the most cost effective ways of measuring land reflectivity at VHF/UHF frequencies is to use signals transmitted by existing communication satellites (operating at VHF/UHF band) as a signal of opportunity (SoOp) signal and passive receivers integrated with airborne/space borne platforms operating in the Low Earth Orbit (LEO). One of the critical components of the passive receiver is two antennas (one to receive only direct signal and other to receive only reflected signal) which need to have ideally high (>30dB) isolation. However, because of small size of host platforms and broad beam width of dipole antennas, achieving adequate isolation between two channels is a challenging problem and need to be solved for successful implementation of space borne SoOp technology for remote sensing. In this presentation a novel enabling VHF antenna technology for Cubesat platforms is presented to receive direct as well as reflected signal with needed isolation. The novel scheme also allows enhancing the gain of individual channels by factor of 2 without use of reflecting ground plane |
| File Size | 74016 |
| Page Count | 2 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_20160000216 |
| Archival Resource Key | ark:/13960/t5hb44j13 |
| Language | English |
| Publisher Date | 2015-07-19 |
| Access Restriction | Open |
| Subject Keyword | Crossed Dipole Antennas Satellite-borne Instruments Ultrahigh Frequencies Soil Moisture Communication Satellites Earth Sciences Remote Sensing Antenna Design Low Earth Orbits Very High Frequencies Very High Frequency Radio Equipment Miniaturization Antennas Reflectance Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
