Lab-05-a: Noise Figure Analysis

Use http://www.rfdh.com/rfdb/nf.htm

1. Find the system noise figure and the noise temperature of the following receiver. This receiver has a large noise figure because a long cable with loss of 6 dB connects an antenna to a preselector filter.

2. Find the system noise figure and the noise temperature of the following receiver where we have placed an LNA as the first element after the antenna. As a result, this receiver has a much smaller noise figure than the previous receiver.

3. Interchange the first BPF with the cable. Find the system noise figure and the noise temperature. Is there any change?