A compact UWB BPF design using silicon-based IPD technology

Band pass filter (BPF) is widely used in the front end of ultra wide band (UWB) system. The miniaturization for the BPF is needed greatly in order to reduce the size and the cost. In this paper we present a compact BPF which is made by using integrated passive device (IPD) technology in high resistance silicon substrate. The filter can achieve the similar performance with smaller size comparing to traditional technologies such as PCB or LTCC. The size of the filter is only 1.53mm×1.09mm. The in-band insertion loss is less than 0.3dB at 7.656GHz with 528MHz bandwidth. Out-band attenuations are more than 20dB in both 6.956GHz and 8.356GHz. Out-band attenuations are more than 20dB in both 6.956GHz and 8.356GHz.