LOW POWER DELAY FILTERS FOR MCPA APPLICATIONS

摘要

Multicarrier power amplifiers (MCPA) and their importance to wide modulation have received extensive coverage in recent literature. The demand for faster data rates has given a boost to the MCPA industry and magnified interest in improving performance and reducing the size and cost of MCPA assemblies. In an MCPA assembly, shown in Figure 1, the delay elements represent an area of potential improvement. These elements, which exist in both paths, are responsible for balancing intermod-ulation (IM) product mitigation. In a deeper sense, minimizing delay differences between the paths widens the bandwidth over which the desired cancellation is achieved. A novel advance in the design of delay elements promises performance and manufacturing benefits.