Design of an Equal Microstrip Wideband Power Divider With Embedding Coupled Lines and Cross Resonating Structures

A filtering power divider (FPD) with a wide band response is designed and demonstrated in this manuscript. To achieve the necessary wide bandwidth, two sets of parallel coupled lines (PCLs) and cross coupled resonators are used. To obtain the desired isolation between output ports, instead of a resistor, a combination of defected ground structure (DGS) and a short‐circuit (SC) line is added between the output ports of the proposed divider. The design equations are derived by analyzing the proposed symmetrical model using even‐odd mode analysis. To evaluate the properties of the model, an FPD is designed at 2.7 GHz. The FPD is developed on the substrate Rogers RT/duroid 5880. The designed structure exhibits a wide operating bandwidth of 55%, extending from 2.0 to 3.5 GHz, and ensures equal power division as well as adequate isolation at its outputs, which satisfies the wideband frequency range. The isolation and reflection coefficient between the output ports are maintained > −14 dB throughout the bandwidth. The design has several advantages, like via less design and compact in size (0.66 λg × 0.9 λg).