Browsing by Subject "Source degeneration"

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    GaN-based single stage low noise amplifier for X-band applications
    (IEEE, 2022-07-18) Çağlar, Gizem Tendürüs; Aras, Yunus Erdem; Urfalı, Emirhan; Yılmaz, Doğan; Özbay, Ekmel; Nazlıbilek, Sedat
    Source degenerated HEMTs are used to achieve good noise matching and better input return loss without degrading the noise figure and reducing the stability. This work presents an MMIC design for the frequency band of 8–11 GHz by using HEMTs with source degeneration in 0.15 µm GaN on SiC technology. All design work is done in the Advanced Design System. The LNA delivers more than 6.9 dB gain with better than 8.5 dB and 9.5 dB input and output return losses, respectively. In addition, the gain ripple is around 2.7 dB. The noise figure of the amplifier is achieved below 1.1 dB with P1dB of 17.2 dBm and %12.7 drain efficiency within the operating bandwidth at the bias conditions of 9 V /20 mA.
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    X-band cascode LNA with bias-invariant noise figure using 0.15 µm GaN-on-SiC technology
    (IEEE, 2022-07-18) Nawaz, Muhammad Imran; Aras, Yunus Erdem; Zafar, Salahuddin; Akoğlu, Büşra Çankaya; Tendürüs, Gizem; Özbay, Ekmel
    Cascode HEMTs exhibit better stability and broad bandwidths performance as compared with common source HEMTs. This paper presents the design of a single stage broadband low noise amplifier based upon 0.15 um GaN HEMT technology in the frequency range of 8 – 12 GHz. Cascode HEMT with inductive source degeneration is utilized. All the design work is done using PathWave Advanced Design System. The LNA provides 9.5 to 10.6 dB with input return loss better than 10 dB and output return loss better than 8 dB in the whole band. The noise figure of the amplifier is below 1.9 dB. The linearity parameters P1dB and OIP3 are greater than equal to 16 dBm and 28 dBm respectively within operating bandwidth. The noise figure of the amplifier is fairly constant over 30 mA to 60 mA bias currents and 9 V – 18 V operating bias voltage. This is a unique finding which is being reported for the first time to the best of authors' knowledge.