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Implementation of an LNA Using a Microstrip Coupler as a DC-Block for Sub-6 5G Communication Systems

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Abstract

This paper presents the design strategy of a microwave low noise amplifier (LNA) in microstrip technology for sub-6 GHz 5G communication systems. A microstrip coupler is exploited to design a DC block in order to avoid unwanted parasitic effects generated by lumped elements and to facilitate fabrication. Bias and matching networks are implemented using microstrip transmission lines. Based on the designed circuit, a prototype is fabricated and measured using an Agilent Technologies (hp)® ATF13786 field effect transistor. The proposed LNA is simulated and measured at 3.5 GHz. The results demonstrate that the proposed LNA achieves high gain of 12.7 dB, noise figure less than 2 dB, input and output reflection coefficients less than –10 dB, and unconditional stability over the desired bandwidth. Regarding the large signal results, the proposed LNA yields excellent performance with an output power of 16.4 dBm, and a power added efficiency (PAE) of 18%. Furthermore, the proposed LNA exhibits good linearity with an output compression point at 1 dB (OP1dB) of 0 dBm, and a third-order intercept point (OIP3) greater than +37.7 dBm.

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Funding

This work was supported by ongoing institutional funding. No additional grants to carry out or direct this particular research were obtained.

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Authors and Affiliations

  1. Electronics, Communication Systems and Energy Optimization Group, (OPTIMEE), Faculty of Sciences, Moulay Ismail University, Meknes, Morocco

    Mohamed Boumalkha, Mohammed Lahsaini & Moulay El Hassane Archidi

  2. Innovation Lab for Operations, Mohammed VI Polytechnic University (UM6P), Ben Guerir, Morocco

    Hafid Griguer

  3. Information and Telecommunication Systems Laboratory (LaSiT), FS, Abdelmalek Essaadi University, Tetouan, Morocco

    Otman El Mrabet & Taj Eddin Elhamadi

  4. Laboratory of Aeronautical & Telecommunication, Mohammed VI, International Academy of Civil Aviation, Casablanca, Morocco

    Jamal EL Aoufi

  5. Hassan First University of Settat, National School of Applied Sciences, Laboratory LISA, 26100, Berrechid, Morocco

    Mohamed Taouzari

Authors
  1. Mohamed Boumalkha
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  2. Mohammed Lahsaini
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  3. Hafid Griguer
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  4. Otman El Mrabet
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  5. Taj Eddin Elhamadi
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  6. Moulay El Hassane Archidi
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  7. Jamal EL Aoufi
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  8. Mohamed Taouzari
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Correspondence to Mohamed Boumalkha.

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Mohamed Boumalkha, Lahsaini, M., Griguer, H. et al. Implementation of an LNA Using a Microstrip Coupler as a DC-Block for Sub-6 5G Communication Systems. Russ Microelectron 52, 547–555 (2023). https://doi.org/10.1134/S106373972370066X

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