摘要
回旋行波管放大器是一种具有高功率、高频率、宽带宽的毫米波放大器,TE02模二次谐波回旋行波管放大器在保持基波回旋行波管放大器的基础上极大地减小了工作磁场,从而具有广阔的应用前景.利用两段分布式损耗的互作用结构,有效抑制了绝对不稳定性和回旋返波振荡,避免了模式互作用电路引起的模式畸变,提高了输出功率,在一定程度上克服了谐波互作用较弱的缺点,满足了扩展功率容量和放大器长时间稳定工作的要求.非线性模拟结果和粒子模型(particleincell)模拟结果均表明,在工作电压为100kV,工作电流为20A的情况下,获得了15%的效率和5%的带宽,输出峰值功率达到300kW.
Gyrotron traveling wave amplifier is a very important high power millimeter wave source for radar applications. Second- harmonic operation is of special significance due to its low magnetic field operation. By using an interaction circuit with two-stage distributed-loss, the absolute instability and the gymtmn backward wave oscillation can be suppressed. Nonlinear analysis is used to study the stability and large signal performance of the amplifier. Particle in cell simulation of W-band TE02 gyrotmn traveling wave amplifier are also performed. The results show that this amplifier can generate 300 kW at 94 GHz with 15% efficiency and 5% bandwidth in case of a 100 kV, 20 A electron beam input.
出处
《物理学报》
SCIE
EI
CAS
CSCD
北大核心
2007年第8期4515-4522,共8页
Acta Physica Sinica
基金
国家自然科学基金(批准号:60571039)
国家杰出青年科学基金(批准号:60125104)资助的课题.~~
关键词
W波段
二次谐波
回旋行波管放大器
W-band, second-harmonic, gyrotron traveling wave amplifier
