本文選題：毫米波 + 合成效率�。� 參考：《電子科技大學》2015年碩士論文

【摘要】：固態(tài)功率器件越來越廣泛的應(yīng)用于毫米波系統(tǒng)中,固態(tài)器件的性能可靠性好、直流供電電壓較低、體積小和易于模塊化等獨有特點逐漸地替代了過去的電真空器件。單個固態(tài)功率器件輸出功率依然很低,為了達到毫米波系統(tǒng)對大功率的要求,一般常常用功率合成方式來滿足系統(tǒng)對大功率的要求,是當前最有效的方式。本文主要基于波導(dǎo)功率合成方法對毫米波固態(tài)功率合成技術(shù)進行了分析和設(shè)計,而且從功率合成網(wǎng)絡(luò)的電路損耗、幅相不一致性等方面對功率合成效率的影響進行討論和分析,對功率合成中放大器失效性的問題進行了討論。并且對徑向波導(dǎo)功率合成技術(shù)的理論進行了分析。在此基礎(chǔ)上設(shè)計了Ka波段的十六路固態(tài)功率合成放大器,并研制了W波段的十二路以圓波導(dǎo)激勵的徑向波導(dǎo)功率分配網(wǎng)絡(luò)。基于分支波導(dǎo)電橋結(jié)構(gòu),設(shè)計并研制了五孔分支波導(dǎo)電橋和七孔分支波導(dǎo)電橋。實測結(jié)果顯示五孔分支波導(dǎo)電橋在32-40GHz范圍內(nèi)幅相一致性良好,S21,S31在-3.1到-3.4dB。七孔的分支波導(dǎo)電橋相比五孔分支波導(dǎo)電橋帶寬得到擴展,但損耗增加了。并且在五孔分支波導(dǎo)電橋的基礎(chǔ)上設(shè)計了立體式的四路功率合成網(wǎng)絡(luò),實測顯示在32-40GHz幅相一致性良好。并且還設(shè)計了基于五孔分支波導(dǎo)電橋和波導(dǎo)-微帶同側(cè)雙探針的功率合成網(wǎng)絡(luò)。加工實物測試結(jié)果顯示在32-40GHz插損為1dB左右,有著隔離度高、低損耗,寬頻帶的性能。基于徑向波導(dǎo)原理,利用圓波導(dǎo)TE01模的特點,設(shè)計并加工了在W波段的以圓波導(dǎo)激勵十二路空間徑向功率分配網(wǎng)絡(luò),并且對圓波導(dǎo)仿真設(shè)計了一種花瓣型模式轉(zhuǎn)換器,有效地抑制了圓波導(dǎo)其他低次模的傳輸。該分配網(wǎng)絡(luò)實測結(jié)果顯示,在88GHz-96GHz頻帶內(nèi),輸出端口的插入損耗約為11.1~11.7dB左右,回波損耗優(yōu)于15dB。顯示其寬帶和低損耗特點,使得它可以應(yīng)用于W波段的功率合成技術(shù)。研制了Ka波段十六路波導(dǎo)空間功率合成放大器。實測結(jié)果表明,合成放大模塊功率測試表明在36GHz處有飽和輸出Psat為35.11dBm,在36GHz處P-1dB為34.51dBm;32~40GHz范圍內(nèi),其合成效率都大于75%,在36GHz達到最大,為84.3%。
[Abstract]:Solid-state power devices are more and more widely used in millimeter-wave systems. The solid-state devices have the advantages of good reliability, low DC supply voltage, small size and easy modularization. The output power of a single solid-state power device is still very low. In order to meet the requirement of high power in millimeter-wave system, power combination is usually used to meet the requirement of high-power, which is the most effective way at present. In this paper, the millimeter-wave solid-state power synthesis technology is analyzed and designed based on the waveguide power combination method, and the influence of the power synthesis efficiency on the power synthesis efficiency is discussed and analyzed from the aspects of circuit loss and amplitude and phase inconsistency of the power synthesis network. The problem of amplifier failure in power synthesis is discussed. The theory of radial waveguide power synthesis is analyzed. On the basis of this, a 16-channel solid-state power synthesizer in Ka band is designed, and a 12-channel radial waveguide power distribution network with circular waveguide excitation in W band is developed. Based on the structure of the branch waveguide bridge, the five hole branch waveguide bridge and the seven hole branch waveguide bridge are designed and developed. The measured results show that the amplitude-phase consistency of the five-hole branched waveguide bridge is good in the range of 32-40GHz. The range of S _ 21O _ S _ 31 is from -3.1 to -3.4 dB. Compared with the five-hole branch waveguide bridge, the bandwidth of the seven-hole branch waveguide bridge is expanded, but the loss is increased. Based on the five-hole branched waveguide bridge, a four-way power synthesis network is designed. The measured results show that the amplitude and phase consistency is good at 32-40GHz. A power synthesis network based on a five hole branch waveguide bridge and a waveguide-microstrip ipsilateral double probe is also designed. The experimental results show that the insertion loss is about 1dB at 32-40GHz, with high isolation, low loss and wide band performance. Based on the principle of radial waveguide and the characteristics of circular waveguide TE01 mode, a 12-channel radial power distribution network excited by circular waveguide in W band is designed and fabricated, and a petal mode converter is designed for circular waveguide simulation. The propagation of other low-order modes of circular waveguide is effectively suppressed. The measured results of the distribution network show that the insertion loss of the output port is about 11.1 ~ 11.7dB in the band of 88GHz-96GHz, and the return loss is better than 15dB. Because of its wide band and low loss, it can be used in W band power synthesis technology. A Ka band 16 channel waveguide space power synthesizer has been developed. The experimental results show that the saturation output Psat is 35.11dBmat 36GHz and the P-1dB is 34.51dBmNiO40GHz at 36GHz, and the synthesis efficiency is higher than 75 and the maximum is 84.3 at 36GHz.
【學位授予單位】：電子科技大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN73

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本文編號：2042002