Which network provides the greatest harmonic suppression?

The Pi-L network provides the greatest harmonic suppression among the given options due to its specific configuration and characteristics. This network combines elements of both a Pi network and an L network, effectively allowing it to filter out unwanted harmonics while maintaining desirable fundamental frequency operation.

In a Pi-L network, the arrangement includes shunt capacitors and series inductors which create additional pathways for the desired signals, while simultaneously offering impedance to the harmonics. The design minimizes resonant peaks and optimizes the performance for selective frequency ranges, resulting in better overall harmonic attenuation.

The combination of inductive and capacitive components in this network allows for a broader and more effective suppression of harmonics compared to simpler architectures, such as the L, Pi, or T networks, which may not offer the same level of filtering capabilities or may resonate at undesired frequencies. The unique structure of the Pi-L network facilitates higher quality factors, which enhances its filtering performance against harmonics while also maintaining efficiency for the desired fundamental frequency.