LoFASM Technical Memo Series
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Memo 7: Analog Signal Path of LoFASM |
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| The LoFASM Radio Antenna Array consists of 12 LWA style crossed dipole antennas set in two concentric rings of six antennas each. The two rings are set up in a hexagram configuration, with the inner ring being 4.41 meters from the center of the configuration, such as to monitor between 5-88 MHz with a maximum sensitivity at 20 MHz. At the top of the antenna is the Front End Electronics(FEE) Board, which is bolted to the dipoles. Connected to the FEE board are two LMR-195 cables with an SMA plug on one side and an N Jack on the other, with the SMA side connected to the FEE board. Read More... |
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Memo 1: The Low Frequency All Sky Monitor for the Study of Radio Transients: Array Configuration and Sensitivity |
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| The forthcoming Low Frequency All Sky Monitor (LoFASM) will be an array of dipoles working between 10-88 MHz adapted from the Long Wavelength Array (LWA) design. This array will offer significant advantages over other projects for the study of radio transients, but its effectiveness will depend on the geometric details of the array. This thesis presents the results of theoretical sensitivity calculations for a single 12 antenna array. An optimal configuration was found that can effectively block terrestrial signals incident from the horizon at certain ”resonant” frequencies. This configuration will allow LoFASM to operate in regions with relatively high radio frequency interference. Read More... |
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