Abstract
An MMIC active band-pass filter is designed for the implementation of a tunable RF filter in a 0.35μm SiGe BiCMOS technology. This filter structure is proposed for operation in the S-band applications and BiCMOS MMICs applications for wireless personal communication. In simulations, the reasonably good performance was obtained. This filter is centered at 2.4GHz and has 30dB rejections @0.7-GHz offset from pass-band edges. These sharpened edges were caused by a tuned amplifier. The simulations show a frequency tuning range from 1.9GHz to 2.5GHz and a noise figure of 7.5–10 dB depending on center frequency. In addition, the design was optimized with artificial neural network (ANN). A feed-forward, four-layer Perceptron structure (MLP4) was used.
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