Design of CMOS Power Amplifier with Resistive Feedback and Notch Filter for UWB Systems

A CMOS power amplifier (PA) with the implementation of the notch filter designed for ultra-wideband (UWB) systems is presented in this paper. The design is consisted of two stages of amplifier involving source follower and common source topologies with a notch filter and an output matching network. Such design is meant for full band UWB applications that utilize the frequency range within 3.1 GHz to 10.6 GHz with the elimination at 5-6 GHz using 0.18 µm CMOS process. The simulation shows that the proposed PA design achieved 19.25 dB maximum gain with 1.8 V power supply. In this work, the achieved input and output return loss ranging from -8.13 dB to -19.19 dB, and -1.68 dB to -16.03 dB, respectively, through full band frequency

Improvement of the bandwidth and scattering parameter performances of 5G branch-line coupler design for the use in Intelligent Transportation System (ITS)

This paper presents a design of 5G branch-line coupler that operates at 10 GHz frequency range. The proposed coupler is implemented with four stubs and two slots to improve the performances including the scattering parameter and also the bandwidth. Advanced Design System (ADS) software is used to design and perform the simulation stage. The proposed 5G coupler with stub and slot technique has enhances the bandwidth up to 60% as compared to the one proposed earlier in the literature. Additionally, the simulation results show that the scattering parameter and phase differences have also improved. The proposed design is suitable to be used later in Butler Matrix for Intelligent Transportation System (ITS) application