Browsing by Author "Hu, yaolong hu"

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    A Systematic Approach to Designing Broadband Millimeter-Wave Low Noise Amplifiers
    (2022-12-02) Hu, yaolong hu; Chi, Taiyun
    There is a growing interest in wideband mmWave transceivers to simultaneously cover multiple mmWave 5G bands. These 5G bands centered at 26, 28, 39, and 41 GHz. Compared to narrowband designs, broadband 5G transceivers can enable a few unique application scenarios, such as inter-band carrier aggregation to increase the data throughput, global multi-standard coverage for international roaming, and agile frequency hopping. In addition to high-speed wireless communication, emerging wireless sensing applications, such as 3D mmWave imaging and radar, also favor broadband transceivers, since the range resolution is inversely proportional to BW. As the first stage of the receiver, LNA plays an important role in defining the receiver bandwidth. In my master thesis, our goal is to establish a systematic yet intuitive design methodology to extend mmWave LNA bandwidth. Since the LNA bandwidth is defined as the intersection of 3 dB gain bandwidth and -10 dB return loss bandwidth, so we will cover two circuit innovations in this thesis. First, we will go through how to synthesize dual-resonant input matching. And second, a broadband transformer-based output network synthesis methodology is presented. A 26-47-GHz LNA prototype is fabricated with GlobalFoundries 45RFSOI process and its measurement results are also included in this thesis.