A Novel Wideband Filtering Power Divider with Full Frequency Isolation Performance, Controllable Bandwidth and Reflection Level

In this paper, a novel wideband filtering power divider (FPD) is proposed, which compose of a pair of transmission lines (TLs), two pairs of shunt short-ended stubs (SESs), a pair of coupled lines (CLs), a short-ended CL, and three isolation resistors. By using the even-/odd-mode analysis method and synthesize analysis method introduced, a design example is given, analyzed and calculated, which can achieve controllable in-band reflection level and fractional bandwidth (FBW) of S
11
, as well as full frequency isolation. For further verification, the protype is fabricated and measured, the results show that the in-band reflection level is of S
11
(S
22
) is −19.7dB (−10.2dB), FBW of S
11
is 50.9%, and full frequency isolation levels are lower than −15.2dB. Good consistency is achieved between simulated results and measured results.