[案例]玻璃基3D IPD带通滤波器

A compact bandpass filter with low insertion loss and high selectivity is presented using 3D glass-based IPD technology. A modified asymmetric π structure is introduced to generate three poles to achieve wide bandwidth and low insertion loss. In order to achieve better selectivity and higher out-of-band rejection, the introduced modified asymmetric π structure is adopted to generate two controllable transmission zeros on both sides of the passband. Compared to the traditional π structure, the modified π structure does not require the design to be completely symmetrical, thereby providing the filter design greater flexibility. High-Q 3D inductors based on 3D glass-based technology are utilized to achieve lower insertion loss. The proposed bandpass filter, which covers the band of 2.4–2.9 GHz, is fabricated with a compact size of 1.6 mm × 0.8 mm × 0.35 mm. The measured results show that it can achieve an insertion loss less than 1.6 dB and a return loss better than 15 dB in the passband. Its out-of-band rejection is better than 24 dB from DC to 1.89 GHz and from 3.7 GHz to 10 GHz. The simulated and measured results of the proposed BPF are in reasonably good agreement.

该成果使用了法动科技射频EDA工具-Ult ..

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