本文選題：超寬帶 + 電壓駐波比　； 參考：《中國科學(xué)院大學(xué)學(xué)報(bào)》2016年04期

【摘要】：使用Microwave Office軟件,仿真分析MUSER-I(0.4~2 GHz)和MUSER-II(2~15 GHz)3 d B定向耦合器.電橋采用多節(jié)耦合器實(shí)現(xiàn),且每節(jié)耦合器的長度為中心頻率波長的1/4,對電橋進(jìn)行分析并制作實(shí)物.實(shí)測結(jié)果表明,MUSER-I的3 d B定向耦合器的輸出幅度在(-3±0.2)d B,輸出端口相位差在91.9°~89°之間;MUSER-II的3 d B定向耦合器的電壓駐波比在全頻帶范圍內(nèi)小于1.31,輸出端口相位差在96.05°~85°之間.通過日像儀系統(tǒng)接收太陽左旋和右旋圓偏振射電信號(hào),并計(jì)算信號(hào)的圓偏振度,得到觀測圓偏振度與太陽信號(hào)本身圓偏振度之間的誤差和太陽信號(hào)本身偏振度的關(guān)系.當(dāng)太陽信號(hào)本身極化度為10%時(shí),誤差最大為9.4%.
[Abstract]:Microwave Office software is used to simulate and analyze MUSER-I(0.4~2 GHz) and MUSER-II(2~15 GHz)3 DB directional coupler. The bridge is realized by multi-section coupler, and the length of each coupler is 1 / 4 of the central frequency wavelength. The bridge is analyzed and made. The measured results show that the output amplitude of 3 dB directional coupler of MUSER-I is in the range of 3 鹵0.2 dB, the phase difference of output port is between 91.9 擄and 89 擄, the voltage standing wave ratio of 3dB directional coupler of MUSER-II is less than 1.31 in the full frequency range, and the phase difference of output port is between 96.05 擄and 85 擄. The left and right circularly polarized radio signals of the sun are received by the heliograph system, and the degree of circular polarization of the signal is calculated. The error between the observed degree of circular polarization and the degree of circularity of the solar signal itself and the degree of polarization of the signal itself are obtained. When the polarization of the solar signal itself is 10, the maximum error is 9.4.
【作者單位】： 中國科學(xué)院國家天文臺(tái)中國科學(xué)院太陽活動(dòng)重點(diǎn)實(shí)驗(yàn)室;
【基金】：國家重大科研裝備項(xiàng)目(ZDYZ2009-3) 國家青年基金(11203042) 聯(lián)合基金(U1231205) 國家自然科學(xué)基金面上項(xiàng)目(11573043)資助
【分類號(hào)】：P161

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