Processing, property modulation and application of one-dimensional SiC nanostructure field emitters

Chen, Yun; Liu, Zuohui; Xiao, Zhiming; Li, Zijian; Hou, Maoxiang; Chen, Xin; Gao, Jian; Wong, Ching‐Ping

doi:10.1016/j.mee.2023.112019

Cited by 5 publications

(1 citation statement)

References 117 publications

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“…While microwave-tube PAs offer good linearity and stability, they are larger, consume more power, and incur higher maintenance costs [ 28 , 29 ]. Additionally, while semiconductor-device PAs entail advantages such as small size and low power consumption, their linearity and stability evince limitations related to device characteristics [ 30 , 31 ]. Thus, improving the reliability and maintenance of the PA, while ensuring power output and signal stability, is a key focus.…”

Section: Introductionmentioning

confidence: 99%

Catalyzing satellite communication: A 20W Ku-Band RF front-end power amplifier design and deployment

Chen,

Wang,

Zhang

et al. 2024

PLoS ONE

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This paper presents a groundbreaking Ku-band 20W RF front-end power amplifier (PA), designed to address numerous challenges encountered by satellite communication systems, including those pertaining to stability, linearity, cost, and size. The manuscript commences with an exhaustive discussion of system design and operational principles, emphasizing the intricacies of low-noise amplification, and incorporating key considerations such as noise factors, stability analysis, gain, and gain flatness. Subsequently, an in-depth study is conducted on various components of the RF chain, including the pre-amplification module, driver-amplification module, and final-stage amplification module. The holistic design extends to the inclusion of the display and control unit, featuring the power-control module, monitoring module, and overall layout design of the PA. It is meticulously tailored to meet the specific demands of satellite communication. Following this, a thorough exploration of electromagnetic simulation and measurement results ensues, providing validation for the precision and reliability of the proposed design. Finally, the feasibility of that design is substantiated through systematic system design, prototype production, and exhaustive experimental testing. It is noteworthy that, in the space-simulation environmental test, emphasis is placed on the excellent performance of the Star Ku-band PA within the 13.75GHz to 14.5GHz frequency range. Detailed power scan measurements reveal a P1dB of 43dBm, maintaining output power flatness < ± 0.5dBm across the entire frequency and temperature spectrum. Third-order intermodulation scan measurements indicate a third-order intermodulation of ≤ -23dBc. Detailed results of power monitoring demonstrate a range from +18dBm to +54dBm. Scans of spurious suppression and harmonic suppression, meanwhile, show that the PA evinces spurious suppression ≤ -65dBc and harmonic suppression ≤ -60dBc. Rigorous phase-scan measurements exhibit a phase-shift adjustment range of 0° to 360°, with a step of 5.625°, and a phase-shift accuracy of 0.5dB. Detailed data from gain-scan measurements show a gain-adjustment range of 0dB to 30dB, with a gain flatness of ± 0.5dB. Attenuation error is ≤ 1%. These test parameters perfectly align with the practical application requirements of the technical specifications. When compared to existing Ku-band PAs, our design reflects a deeper consideration of specific requirements in satellite communication, ensuring its outstanding performance and uniqueness. This PA features good stability, high linearity, low cost, and compact modularity, ensuring continuous and stable power output. These features position the proposed system as a leader within the market. Successful orbital deployment not only validates its operational stability; it also makes a significant contribution to the advancement of China’s satellite PA technology, generating positive socio-economic benefits.

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Section: Introductionmentioning

confidence: 99%

Catalyzing satellite communication: A 20W Ku-Band RF front-end power amplifier design and deployment

Chen,

Wang,

Zhang

et al. 2024

PLoS ONE

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Voltage‐ and Metal‐assisted Chemical Etching of Micro and Nano Structures in Silicon: A Comprehensive Review

Surdo,

Barillaro

2024

Small

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Sculpting silicon at the micro and nano scales has been game‐changing to mold bulk silicon properties and expand, in turn, applications of silicon beyond electronics, namely, in photonics, sensing, medicine, and mechanics, to cite a few. Voltage‐ and metal‐assisted chemical etching (ECE and MaCE, respectively) of silicon in acidic electrolytes have emerged over other micro and nanostructuring technologies thanks to their unique etching features. ECE and MaCE have enabled the fabrication of novel structures and devices not achievable otherwise, complementing those feasible with the deep reactive ion etching (DRIE) technology, the gold standard in silicon machining. Here, a comprehensive review of ECE and MaCE for silicon micro and nano machining is provided. The chemistry and physics ruling the dissolution of silicon are dissected and similarities and differences between ECE and MaCE are discussed showing that they are the two sides of the same coin. The processes governing the anisotropic etching of designed silicon micro and nanostructures are analyzed, and the modulation of etching profile over depth is discussed. The preparation of micro‐ and nanostructures with tailored optical, mechanical, and thermo(electrical) properties is then addressed, and their applications in photonics, (bio)sensing, (nano)medicine, and micromechanical systems are surveyed. Eventually, ECE and MaCE are benchmarked against DRIE, and future perspectives are highlighted.

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Effect of Al content on chemical corrosion resistance of Al/SiC composites

Du,

Sun,

Sun

et al. 2023

Ceramics International

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Processing, property modulation and application of one-dimensional SiC nanostructure field emitters

Cited by 5 publications

References 117 publications

Catalyzing satellite communication: A 20W Ku-Band RF front-end power amplifier design and deployment

Catalyzing satellite communication: A 20W Ku-Band RF front-end power amplifier design and deployment

Voltage‐ and Metal‐assisted Chemical Etching of Micro and Nano Structures in Silicon: A Comprehensive Review

Effect of Al content on chemical corrosion resistance of Al/SiC composites

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