Understanding the Language of Intermodulation Specifications in HPA Data Sheets
High power amplifiers (HPAs) are a critical component in the uplink earth station RF chain and are generally the most expensive components, after antennas, in that chain. For this reason, integrators or users in the market for HPAs must take great care to ensure that like-for-like comparisons are made when evaluating HPAs.
Typically, linear output power and power consumption are two of the most important specifications for HPA comparison in the industry. The comparison of linear power is not which amplifier provides more of it --- rather it is the point from which a valid comparison can be made. A diligent consumer might think it obvious, therefore, to simply collect different manufacturers’ data sheets on HPAs that meet the link budget’s linear power requirement and then make a comparison of each manufacturer’s key specifications, such as power consumption, weight, heat loss, size, other features, and price. However… READ THE FULL ARTICLE