Ultra-wide-band (UWB) band-pass-filter using integrated passive device (IPD) technology for wireless applications

Recently, the need for high speed data transmission and reception coupled with the ever increasing demand for mobility in consumer devices has generated a great interest in low cost devices with smaller form-factors. In this paper, the design of an ultra-wide-band (UWB) band-pass-filter (BPF) with a pass-band frequency bandwidth from 7.0 GHz to 9.0 GHz (15 dB return loss bandwidth) is described. The UWB BPF makes use of lumped integrated passive device (IPD) technology on a silicon substrate for wireless applications. This filter shows 2.0 dB insertion loss from 7.0 GHz to 9.0 GHz. The UWB filter of flip-chip version has size of 1.4 mm times 1.2 mm times 0.40 mm (including bump height). To the best of our knowledge, the UWB band-pass-filter developed in this paper has the smallest size while achieving equivalent electrical performance.