催化卫星通信:20W的Ku频RF前端功率放大器的设计和部署
Jiafa Chen1, Fei Wang1, Dawei Zhang1
1Department of Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Lab of Modern Optical System, University of Shanghai for Science and Technology, Shanghai, China.
PloS one
|April 10, 2024
概括
本文介绍了一种新的Ku频段20W射频功率放大器 (PA) 用于卫星通信,提供更好的稳定性,线性和降低成本. 该设计确保在13.75-14.5GHz范围内的可靠性能,满足严格的空间应用需求.
科学领域:
- 射频工程 射频工程
- 卫星通信 卫星通信
- 功率放大器设计 功率放大器设计
背景情况:
- 卫星通信系统面临的挑战是功率放大器 (PA) 的稳定性,线性,成本和尺寸.
- 现有的Ku频段PAs可能无法完全满足现代卫星通信的特定需求.
研究的目的:
- 为卫星通信系统设计和验证一款开创性的20WKu频段射频前端功率放大器 (PA).
- 解决目前的电力发电系统在稳定性,线性,成本和尺寸方面的局限性.
主要方法:
- 系统设计包括低噪音放大原理,稳定性分析和射频链组件优化.
- 电磁模拟,原型生产和严格的实验测试,包括太空模拟环境测试.
- 详细的性能测量涵盖输出功率,线性,虚假/和抑制,相位转移和增强调整.
主要成果:
- 库频段PA在13.75-14.5GHz范围内表现出色,P1dB为43dBm,输出功率平度<±0.5dBm.
- 实现了三级调节间扭曲 ≤ -23dBc,虚假抑制 ≤ -65dBc,和抑制 ≤ -60dBc.
- 阶段转移调整范围为0°-360° (5.625°步骤),精度为0.5dB,增益调整范围为0-30dB (±0.5dB平度).
结论:
- 开发的Ku频段PA满足实用的卫星通信要求,表现出卓越的稳定性,线性,低成本和紧的模块化.
- 成功的轨道部署验证了设计的运行稳定性,并为中国卫星PA技术的进步做出了贡献.
- 该PA的功能将其定位为市场领导者,为苛刻的应用提供连续和稳定的功率输出.
相关概念视频
Cascaded Op Amps
630
Operational amplifiers (op-amps) are versatile electronic components that can be interconnected in a cascade - one after another in a linear sequence. This cascading is possible due to their infinite input resistance and zero output resistance, allowing them to maintain their input-output relationships even when connected in series.
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
In a cascaded system, each op-amp is referred to as a stage. The output of one stage drives the input of the subsequent stage. As the input signal passes through...
630
Design Example: Vintage Mixing Console
230
A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
230
Design Example
325
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
325
Small-Signal Analysis of MOSFET Amplifiers
552
In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
552
Characteristics of Series Resonant Circuit
255
Series resonance occurs in a circuit containing inductive (L), capacitive (C), and resistive (R) elements connected sequentially. At the resonance frequency, the inductive and capacitive reactances are equal in magnitude but opposite in sign, effectively canceling each other. This causes the circuit's impedance is minimal, primarily determined by the resistance R. The resonant frequency of an RLC circuit is defined as:
255
Parallel Resonance
208
The parallel RLC circuit is an arrangement where the resistor (R), inductor (L), and capacitor (C) are all connected to the same nodes and, as a result, share the same voltage across them. The parallel RLC circuit is analyzed in terms of admittance (Y), which reflects the ease with which current can flow. The admittance is given by:
208


