Ku-band novel high-power circular waveguide TE01 mode conversion power synthesizer
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摘要: 为在微波波段实现宽带大功率合成输出，设计并研制了一种新型大功率、宽带四路矩形波导TE10模到圆波导TE01模模式变换功率合成器。该模式变换功率合成器由两部分组成，分别是四路矩形波导TE10模合成变换到十字波导TE22模的结构，以及十字波导TE22模变换到过模圆波导TE01模的结构。仿真结果表明，在15.2～18.2 GHz的Ku波段内，TE10-TE01模式合成转化效率大于99.4%，最大可承受1.6 MW的脉冲功率输出。实验验证样品的背靠背冷测实验表明，该模式变换功率合成器在15.2～18.2 GHz频段内的最低合成效率为94%。仿真结果和冷测实验结果表明，该模式变换功率合成器具有工作带宽大、合成效率高、功率容量大的特点，可以较好地解决微波及毫米低端波段宽带大功率TE01模的模式变换和合成输出问题。Abstract:
Background In modern radar and communication systems, power amplifiers determine the system's transmission output power and bandwidth, thereby affecting key performance metrics such as operating range and resolution. As operating frequencies continue to rise, the output power of a single power amplifier device is limited and cannot fully meet the current demands of radar and communication systems for broadband and high power. Therefore, it is necessary to design power synthesizer to achieve multi-channel power synthesis.Purpose In order to achieve broadband high-power synthesis output in the microwave bands, this paper presents a novel high-power, broadband four-way rectangular waveguide TE10 mode to circular waveguide TE01 mode conversion power synthesizer.Methods This mode conversion power synthesizer consists of two parts, namely the structure of four rectangular waveguide TE10 mode synthesis and transformation to cross waveguide TE22 mode, and the structure of cross waveguide TE22 mode transformation to overmoded circular waveguide TE01 mode.Results The simulation results show that in the Ku-band of 15.2−18.2 GHz, the synthesis efficiency of TE10-TE01 mode is greater than 99.4%, and it can withstand a maximum pulse power output of 1.6 MW. The back-to-back cold test of the experimental verification sample shows that the lowest synthesis efficiency of the power synthesizer in the frequency band of 15.2−18.2 GHz is 94%.Conclusions The simulation results and cold test show that the mode conversion power synthesizer has the characteristics of wide working bandwidth, high synthesis efficiency, and high power capacity, which can effectively solve the problem of high-power synthesis output in microwave and millimeter-wave bands.-
Key words:
- power synthesis /
- mode converter /
- Ku-band /
- oversized circular waveguide /
- high power microwave
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图 1 新型大功率圆波导TE01模功率合成器结构示意图
Figure 1. Schematic diagram of the new high-power circular waveguide TE01 mode power synthesizer
图 2 四路TE10到十字波导TE22模式合成结构图
Figure 2. Schematic diagram of the four-channel TE10 to cross waveguide TE22 mode synthesis structure
图 3 四路TE10到十字波导TE22模式合成结构的输入和输出场图
Figure 3. Input and output field plots of the four-channel TE10 to cross waveguide TE22 mode synthesis structure
图 4 四路TE10到十字波导TE22模式合成结构仿真结果
Figure 4. Simulation results of the four-channel TE10 to cross waveguide TE22 mode synthesis structure
图 5 十字波导TE22到圆波导TE01模式变换结构图
Figure 5. Schematic diagram of the cross waveguide TE22 to circular waveguide TE01 mode conversion
图 6 十字波导TE22到圆波导TE01模式变换结构仿真结果
Figure 6. Simulation results of the cross waveguide TE22 to circular waveguide TE01 mode conversion
图 7 Ku波段新型大功率圆波导TE01模模式变换功率合成器电场分布图
Figure 7. Electric field distribution diagram of a new high-power circular waveguide TE01 mode power synthesizer in Ku-band
图 8 各路输入信号的功率差异和相位差异对功率合成效率的影响
Figure 8. The influence of power difference and phase difference of various input signals on power synthesis efficiency
图 9 Ku波段新型大功率圆波导TE01模模式变换功率合成器优化仿真结果
Figure 9. Optimization simulation results of a new high-power circular waveguide TE01 mode power synthesizer in Ku-band
图 10 Ku波段新型大功率圆波导TE01模模式变换功率合成器样品照片
Figure 10. Sample photo of Ku band new high-power circular waveguide TE01 mode power synthesizer
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