Log Periodic Dipole Antenna(LPDA)
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Specifications:
- Frequency Range: 40-900 MHz
- Gain: 8-9 dBi
- Beam width: 90-110 degree
- VSWR <2
- Return Loss < -10 dBi
- Design Parameter for Fabrication:
- Number of Element = 28
- Material for Boom and Elements = Aluminium
- Length of Each Boom = 3.63 m (Parallel Two booms with spacing 1cm)
Cross section = 4 cm X 4 cm
- Total Stub length = 0.937 m
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e-CALLISTO Spectrograph
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Specifications:
- Frequency range: 45 MHz - 870 MHz
- Frequency resolution: 62.5 KHz
- Dynamic range: -120 dBm to -20 dBm
- Sensitivity: 25 (mV/dB) ± 1mV/dB
- Noise figure: < 10dB
- Sampling frequency internal clock: 800 s/sec max, external clock: 1000 s/sec max
- Number of channels: 1-500, nominal 200 frequencies per sweep
- Supply: 12V ± 2V / 225mA
- Weight: ∼ 800 g
- Dimensions: 110mm x 80mm x 205mm
- Input: 3 configuration files (configuration, frequency, scheduler)
- Software Output: 2 files (FITS-file and logfile)
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Voltage Standing Wave Ratio(VSWR)
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The parameter VSWR is a measure that numerically describes how well the antenna is impedance matched. VSWR stands for Voltage Standing Wave Ratio
and is also referred to as Standing Wave Ratio (SWR). VSWR is a function of the reflection coefficient, which describes the power reflected from
the antenna. VSWR pattern of our LPD antenna is below 2 in entire frequency band (40 MHz - 900 MHz).
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Radiation Pattern
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