Design of Rectangular Waveguide to Microstrip Power Dividers and Their Application as Compact Rectangular Matching Terminations

Guo, Letian; Li, Jiawei; Fang, Wenrao; Huang, Wenzhu; Shao, Hongxia; Deng, Guangjian; Xie, Shaoyi

doi:10.1109/tmtt.2019.2944370

Cited by 8 publications

(2 citation statements)

References 19 publications

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“…These chips are collaboratively developed to achieve a high-power Ku-Band amplifier through pre-distortion, efficient spatial The microstrip-waveguide transition design is crucial within this module, as its performance directly affects system output power, gain, and other parameters. Therefore, it is crucial for the transition design to exhibit good standing waves, high reliability, and relative insensitivity to assembly errors [66][67][68][69]. Fig 15 reveals a return loss better than -20dB within the 13.75GHz to 14.5GHz Ku-Band, with insertion loss below 0.1dB.…”

Section: Plos Onementioning

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: Plos Onementioning

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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“…Furthermore, the shorter θ12 should be employed to minimize the transmission line's parasitic inductance. It is discovered that the bias circuit's bandwidth and the phase of admittance YCR's frequency-dependent slope have a negative correlation [14]. Figure 5 illustrates the relationship between the phase of admittance YCR's frequency-dependent slope and Z1.…”

Section: Pulsed Voltage Modulatormentioning

confidence: 99%

Design and Implementation of Low Parasitic Inductance Bias Circuit for High-Power Pulsed Power Amplifiers

Fang

Ren

et al. 2023

Electronics

Self Cite

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This article presents a wideband bias circuit with low parasitic inductance for high-power pulsed amplifiers. The proposed bias circuit works similarly to the traditional bias circuit in that it can ensure the transmission of microwaves from the power amplifier to the load while preventing the transmission of microwaves from the power amplifier to the power supply. By making the bias line shorter and the transmission line wider than the traditional bias circuit, the proposed bias circuit reduces its parasitic inductance. The reduction of parasitic parameters is critical for reducing the drain voltage overshoot of the high-power pulse power amplifier and ensuring its safety. The simulation results demonstrate that the proposed bias circuit has a lower parasitic inductance and a wider bandwidth. To validate the theory and simulation results, the traditional and the proposed bias circuits are fabricated using microstrip circuits. Both the simulation and experimental results indicate that the proposed bias circuit has a one-third lower parasitic inductance than the traditional bias circuit. Furthermore, the proposed bias circuit has a wider bandwidth.

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Influences of plasma on a relativistic backward wave oscillator with a resonant reflector and an extracting cavity

et al. 2020

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Using the particle-in-cell method, the influences of the plasma produced in the resonant reflector and extracting cavity of an X-band relativistic backward oscillator are investigated. For the reflector case, the dominant rule of the microwave emission termination of the TM01 mode is the disturbance of the initial phase relationship between the RF fields of the modulated electron and the synchronous harmonic, which increases the generation frequency, excites a high-order mode competition, and then leads to microwave pulse shortening. For the extracting cavity case, the influence of plasma on the beam–wave interaction process is relatively negligible. A notable reduction in the output power is principally caused by the absorption of plasma electrons, which has been preliminarily validated in experiments.

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Design of Rectangular Waveguide to Microstrip Power Dividers and Their Application as Compact Rectangular Matching Terminations

Cited by 8 publications

References 19 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

Design and Implementation of Low Parasitic Inductance Bias Circuit for High-Power Pulsed Power Amplifiers

Influences of plasma on a relativistic backward wave oscillator with a resonant reflector and an extracting cavity

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