The T-junction power divider is a simple three-port network that can be used for power
division or power combining, and it can be implemented in virtually any type of transmission
line medium. Figure 7.5 shows some commonly used T-junctions in waveguide and
microstrip line or stripline form. The junctions shown here are, in the absence of transmission
line loss, lossless junctions. Thus, as discussed in the preceding section, such junctions
cannot be matched simultaneously at all ports. We will analyze the T-junction divider below,
followed by a discussion of the resistive power divider, which can be matched at all
ports but is not lossless.