A Tunable Low Noise Active Bandpass Filter Using a Noise Canceling Technique

  • N. Soltani Department of Electrical Engineering, Malayer Branch, Islamic Azad University, Malayer, Iran
Keywords: Microwave Monolithic integrated circuit (MMIC, , Bandpass filter, quality factor, noise cancelling


A monolithic tunable low noise active bandpass filter is presented in this study. Biasing voltages can control the center frequency and quality factor. By keeping the gain constant, the center frequency shift is 300 MHz. The quality factor can range from 90 to 290 at the center frequency. By using a noise cancelling circuit, noise is kept lower than 2.8 dB. The proposed filter is designed using MMIC technology with a center frequency of 2.4 GHz and a power consumption of 180 mW. ED02AH technology is used to simulate the circuit elements.


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