A 28GHz Lumped-Distributed Miniaturized Filtering Power Divider Using Integrated Passive Device Technology

This paper proposes a miniaturized millimeter-wave (mm-wave) on-chip filtering power divider using the integrated passive device (IPD) process. By using coupled resonators with grounded metal-insulator-metal (MIM) capacitors, the filtering power divider is of small chip size. To improve the output isolation, an isolated strip line and complex impedance are employed. For demonstration, a 28 GHz lumped-distributed filtering power divider is designed using GaAs-based IPD technology. Low loss, high isolation, and small chip size are achieved in the mm-wave range, indicating the possible application of the proposed power divider in monolithic microwave integrated circuits (MMICs).