Project(s)
1. Antenna Amplifier
A low noise amplifier for mobile radio, TV receiver or ham radio. It should provide good intermodulation characteristics and may be matched to a specific antenna. The design should be a trade off between minimum noise figure and maximum gain. The gain should be at least |S21|2 and the noise figure less than Fopt + 2dB. The input and the output should be matched to 50 or 75 Ω. The amplifier may as an option be DC supplied through the antenna cable.
The report should state gain, bandwidth, 1 dB compression point, 3'rd order intercept point and noise figure.
2. Selective RF Amplifier
A low noise input stage in an FM receiver. The amplifier uses one or more transistors and should contain a filter for mirror frequency rejection. The design should be a trade off between minimum noise figure and maximum gain. The gain should be at least |S21|2 and the noise figure less than Fopt + 2dB.The input should be matched to 50 or 75 Ω and the output to 50 Ω. The mirror frequency rejection should be at least 20 dB.
The report should state gain, bandwidth, 1 dB compression point, 3'rd order intercept point and noise figure.
3. Mixer
An active mixer for a superheterodyne receiver. It may use a bipolar transistor or a dual-gate FET. The inputs and output should be matched to 50 Ω. The conversion gain should be at least 0 dB and the LO-RF isolation should be at least 20 dB.
The report should state conversion gain, RF bandwidth, 1 dB compression point and LO-RF and LO-IF isolation.
4. Local Oscillator
LO for a superheterodyne receiver. The tuning is mechanical or voltage controlled. The oscillator frequency should be variable for reception of a specified frequency band (for example the FM broadcast band 88-108 MHz). The oscillator may optionally contain an AFC input. Any harmonics should be at least -16 dBc and other spurious at least -70 dBc. Minimum output power should be 8 dBm. Phase noise at the neighbouring channel should be measured.