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System implications of large radiometric array antennas
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Lin, H. C. Levis, C. A. |
| Copyright Year | 1976 |
| Description | Current radiometric earth and atmospheric sensing systems in the centimeter wavelength range generally employ a directive antenna connected through a single terminal pair to a Dicke receiver. It is shown that this approach does not lend itself to systems with greatly increased spatial resolution. Signal to noise considerations relating to antenna efficiency force the introduction of active elements at the subarray level; thus, if Dicke switching is to be used, it must be distributed throughout the system. Some possible approaches are suggested. The introduction of active elements at the subarray level is found to ease the design constraints on time delay elements, necessary for bandwidth, and on multiple beam generation, required in order to achieve sufficient integration time with high resolution. |
| File Size | 823187 |
| Page Count | 24 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760023358 |
| Archival Resource Key | ark:/13960/t9z07x48f |
| Language | English |
| Publisher Date | 1976-06-01 |
| Access Restriction | Open |
| Subject Keyword | Electronics And Electrical Engineering Microwave Antennas Steerable Antennas High Resolution Signal To Noise Ratios Space Shuttles Transmission Efficiency Antenna Arrays Dicke Radiometers Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |
