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电子工程22年2期

一种适用于 L 波段小型化功率放大器的方案
关统新
(中国电子科技集团公司第十三研究所,河北 石家庄 050051)

摘  要:针对传统内匹配功率放大器在 L 波段及以下频段匹配用键合线过长的问题,采用微带结构进行替代,并通过优化电路布局,缩小了电路尺寸;简化级间匹配电路,进一步缩小电路尺寸;输入匹配电路采用低端增益抑制电路,解决了低端增益过高的问题。最终研制了一款 1.2 ~ 1.4 GHz 的功率放大器。测试结果表明在漏源电压 28 V、脉宽 200 us、占空比 20% 状态下,功率增益大于 25 dB,输出功率全部达到了 80 W,功率平坦度为 0.4 dB,功率附加效率大于 70%,最高点达到了 73%,而体积仅有 14×10 mm。


关键词:L 波段;功率放大器;小型化



DOI:10.19850/j.cnki.2096-4706.2022.02.016


中图分类号:TN722                                    文献标识码:A                                     文章编号:2096-4706(2022)02-0063-03


A Scheme for L-band Miniaturized Power Amplifier

GUAN Tongxin

(The 13th Research Institute of China Electronics Technology Corporation, Shijiazhuang 050051, China)

Abstract: In order to solve the problem that the bonding line of traditional internal matching power amplifier is too long in L-band and below, microstrip structure is used to replace it, and the circuit size is reduced by optimizing the circuit layout; simplify the inter stage matching circuit and further reduce the circuit size; the input matching circuit adopts low-end gain suppression circuit to solve the problem of high low-end gain. Finally, a 1.2~1.4 GHz power amplifier is developed. The test results show that when the drain source voltage is 28 V, the pulse width is 200 us and the duty cycle is 20%, the power gain is greater than 25 dB, all the output power reach 80 W, the power flatness is 0.4 dB, the power added efficiency is greater than 70% and the highest point reaches 73%. The volume is only 14×10 mm.

Keywords: L-band; power amplifier; miniaturization


参考文献:

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作者简介:关统新(1987—),男,汉族,甘肃白银人,工程师,硕士研究生,主要研究方向:GaN 功率放大器。