Balanced Power Amplifier Protection Against Load Mismatch

Sinha, Shruti; Rao, Ch. V. N.; Pujara, Dhaval

doi:10.1109/lmwc.2018.2792692

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…Meanwhile, owing to challenges in current PA research, particularly around modular design, researchers have proposed various new ideas and approaches, such as the design concept of the combination of discrete and integrated modules. These approaches can enhance the balance of power amplification, matching, and stability considerations [32][33][34][35][36]. Research on low-noise techniques and modulation approaches for PAs has also garnered significant attention [37][38][39][40].…”

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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“…It does not come as a surprise that a great research effort is going into finding solutions to protect (from severe VSWR) or desensitize (from moderate VSWR) PAs from load mismatch without using isolators or circulators. To protect against failures with severe VSWR a number of approaches have been used [13]- [20]. For moderate VSWR, typical of mismatched antennas rather than accidental occurrences, the research effort is instead targeting the recovery of performance, or at least the mitigation of the degradation, in terms of output power, efficiency, and linearity.…”

Section: Introductionmentioning

confidence: 99%

Mitigation of Load Mismatch Effects Using an Orthogonal Load Modulated Balanced Amplifier

Quaglia

Powell

Chaudhry

et al. 2022

IEEE Trans. Microwave Theory Techn.

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“…Several broadband enhancement techniques have been reported in the literature. Distributed and balanced configurations 7–9 and various matching technique such as reactive filter synthesis and real‐time frequency techniques 10–14 are proposed. Although distributed and balanced power amplifiers (PAs) have certain advantages in the performance of reflection loss and wideband, it inherently suffers from low power efficiency and large size, making it unsuitable for low cost and low power applications 1 .…”

Section: Introductionmentioning

confidence: 99%

A broadband GaN HEMT power amplifier based on feeding capacitance compensation method

Zhao

Zhu

Zhang

2021

Int J RF Microw Comput Aided Eng

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In order to better cover the frequency band of fifth‐generation communication system in sub‐6GHz frequency, a feeding capacitance compensation method is proposed to improve the bandwidth and efficiency of power amplifier (PA). By adding different feeding capacitance at the drain supply voltage network, resonance valley points occurred at different frequencies are compensated to achieve wide bandwidth and high‐efficiency. For validation purpose, a PA prototype is designed with using a 10‐W Cree GaN high electron mobility transistor device. Maximum 64.7% efficiency has been measured over 80% bandwidth from 2.2 to 5.1 GHz, with maximum output power of 13.5 W. The measurement revealed an adjacent channel leakage ratio of better than −50.3 dBc after digital pre‐distortion while being driven with a 40‐MHz orthogonal frequency‐division multiplexing modulated signal with a peak‐to‐average power ratio of 6.5 dB at an average output power of 32.5 dBm.

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Balanced Power Amplifier Protection Against Load Mismatch

Cited by 7 publications

References 3 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

Mitigation of Load Mismatch Effects Using an Orthogonal Load Modulated Balanced Amplifier

A broadband GaN HEMT power amplifier based on feeding capacitance compensation method

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