Indian Journal of Science and Technology
Year: 2019, Volume: 12, Issue: 12, Pages: 1-14
Abhay Chaturvedi1,2*, Mithilesh Kumar2 and R. S. Meena2
1Department of Electronics and Communication Engineering, Institute of Engineering and Technology, GLA University, Mathura – 281406, Uttar Pradesh, India; [email protected]
2Department of Electronics Engineering, Rajasthan Technical University, Kota – 324010, Rajasthan, India; [email protected], [email protected]
*Author for correspondence
Department of Electronics and Communication Engineering, Institute of Engineering and Technology, GLA University, Mathura – 281406, Uttar Pradesh, India.
Email: [email protected]
Objective: To propose an improved double balanced down conversion mixer for band 1 of WiMedia system at RF frequency of 3.432 GHz and IF frequency of 264 MHz. Method/Analysis: The proposed mixer is based on the Gilbert cell architecture. It uses switch bias technique to improve the noise figure and resistive current injection technique to improve the conversion gain and linearity. A resonating inductor is used to cancel out the effects of parasitic capacitances. Moreover, T type impedance matching, LC impedance matching and output buffer are used at RF trans conductance stage, LO switching stage and load stage respectively for matching purpose. Mixer is simulated in 0.18 μm CMOS technology using keysight Advanced Design System (ADS) software. Findings: Simulation results show that mixer achieves maximum conversion gain of 8.057 dB, third order Input Intercept Point (IIP3) of -10.88 dBm, Double Sideband (DSB) noise figure of 3.515 dB and S11 of -22.926 dB at 1.8 V dc supply voltage. Novelty/Improvement: A high gain, low noise figure double balanced down conversion mixer with low value of input reflection coefficient and suitable linearity is proposed for band 1 of Wimedia system.
Keywords: Current Injection Technique, Double Balanced, Down Conversion Mixer, L and T Type Matching Networks, Switch Bias Technique, Wimedia System
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