Design of Dual-Mode Dual-Band Outphasing Power Amplifier Leveraging on Periodicity of Non-Commensurate Transmission Line Combiner

Development Review of Broadband and Multi-Band Outphasing Power Amplifiers for High-Efficiency Amplification

“…To further extend the frequency coverage of an OPA, multi-band operation is a good candidate. Until now, only a few articles have carried out research on multi-band OPAs [29][30][31][32][33][34]. Furthermore, the design methods in these articles can be divided into three categories: the reconfigurable technique based on tunable elements, multi-band matching topology based on the T or Π network and the multi-mode operation-based frequency periodicity of TLs.…”

“…Meanwhile, the delta length (∆ 1 and ∆ 2 in Figure 8) should be different. In [34], the authors defined these two solutions as Mode-I and Mode-II, respectively. According to the theoretical analysis in [34], the load modulation trajectories of these two operation modes are opposite to each other, as shown in Figure 9.…”

“…In [34], the authors defined these two solutions as Mode-I and Mode-II, respectively. According to the theoretical analysis in [34], the load modulation trajectories of these two operation modes are opposite to each other, as shown in Figure 9. Therefore, the OPAs operating in Mode-I and Mode-II are, respectively, named OPA and inverted OPA (IOPA).…”

“…where the ABCD matrix in ( 2) is obtained by cascading the A dual-band OPA was realized in [34] to verify the dual-mode theory. The operation frequencies were set to 1 and 2 GHz (two times), respectively.…”

“…5(b). This figu 2, where the arrow represents the direction of the reference Y-axis [30][31][32][33][34].…”