Abstract
A reconfigurable -boosted, image-rejected downconversion mixer is presented in this paper using the SiGe 8 HP technology. The proposed mixer operates within 0.9–13.5 GHz that is suitable for software-defined radio applications. The conversion mixer comprises of resistive biased radio frequency (RF) section, double balanced Gilbert cell mixer core sections divided as per I and Q stages for image-rejection purpose, inductively peaked -boosting section and tunable filter section, respectively. In comparison to previous works in the scientific literature, the design shows enhanced conversion gain (CG), noise figure (NF), and image-rejection ratio (IRR). For the entire band of operation, the mixer attains a good return loss of <−10 dB. Additionally, the design accomplishes an excellent CG of 22 dB, NF of 2.5 dB, and an image-rejection ratio of 30.2 dB at maximum frequency. Finally, a third-order intercept point (IP3) of −3.28 dBm and 1 dB compression point (CP1) of −13 dBm, respectively, shows moderate linearity performance.
Highlights
Reconfigurable Gilbert Mixer for Wireless communications have become increasingly popular due to the wide range of potential applications
The systematic approach can be used further to improve the overall performance that estimates the proper width-to length (W/L) ratio to attain the required design specifications
To boost the transconductance within the radio frequency (RF) stage, gm -boosting technique has been used in the design, which leads to good conversion gain (CG) performance
Summary
Reconfigurable Gilbert Mixer for Wireless communications have become increasingly popular due to the wide range of potential applications. In recent years, this industry has experienced tremendous development leading to many wireless standards. It is desired to have a radio front end that is capable of handling multiple standards and applications [1,2,3]. Distinct radio front ends can be used for different standards and applications. This is not possible due to frequency sensitivity [4,5]. One must develop advanced systems with modern blocks with the emergence of the latest wireless standards
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