Produce a 1500-word report on the following experimental investigations on the single-arm rectangular spiral antenna:
- Compare and comment on the input impedance of the spiral antenna at a frequency of 3.3 GHz between simulation and measurement. Please include an explanation of the input impedance.
- Compare and comment on reflection coefficient from 3-4 GHz between simulation and measurement. Please include an explanation of the reflection coefficient and antenna bandwidth.
- Please analyse the antenna radiation characteristics according to the radiation pattern at 3.3 GHz.
- How a Vector Network Analyser (VNA) works?
- How Satimo Near Field Antenna Measurement facility works?
In my experiment, a R&S ZVA 40 VNA ((https://www.rohde-schwarz.com/us/products/test-and-measurement/network-analyzers/rs-zva-vector-network-analyzer_63493-9660.html)) was used.
my Near Field measurement chamber is a MVG SATIMO StarLab.
The data plots we measured in the lab session can be found in the attachment