寬帶高性能四脊波導(dǎo)圓極化器設(shè)計(jì)

王進(jìn); 杜彪; 孫立杰; 解磊

doi:10.11999/JEIT180423

寬帶高性能四脊波導(dǎo)圓極化器設(shè)計(jì)

doi: 10.11999/JEIT180423

王進(jìn)^1, ,,
杜彪¹,
孫立杰¹,
解磊^{1, 2}

1.
中國電子科技集團(tuán)公司第五十四研究所 ??石家莊 ??050081
2.
西安電子科技大學(xué)天線與微波技術(shù)重點(diǎn)實(shí)驗(yàn)室 ??西安 ??710071

基金項(xiàng)目: 國家高技術(shù)研究發(fā)展計(jì)劃(2014AA123601)，政府間國際科技創(chuàng)新合作重點(diǎn)專項(xiàng)(2016YFE0100100)

詳細(xì)信息

作者簡介:
王進(jìn)：男，1983年生，博士生，高級(jí)工程師，研究方向?yàn)槲⒉o源器件、天線饋電網(wǎng)絡(luò)與饋源技術(shù)

杜彪：男，1962年生，博士生導(dǎo)師，研究員，研究方向?yàn)榉瓷涿嫣炀€和高效率饋源、陣列天線和超材料天線等

孫立杰：男，1985年生，工程師，研究方向?yàn)槲⒉o源器件、天線饋電網(wǎng)絡(luò)

解磊：男，1985年生，博士生，研究方向?yàn)樾l(wèi)星通信天線與饋源技術(shù)

通訊作者:
王進(jìn)　15831969575@139.com

中圖分類號(hào): TN821
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出版歷程
- 收稿日期: 2018-05-04
- 修回日期: 2018-10-10
- 網(wǎng)絡(luò)出版日期: 2018-11-01
- 刊出日期: 2019-03-01

Design of Wideband High Performance Quad-ridge Waveguide Polarizer

Jin WANG^{1
, ,},
Biao DU¹,
Lijie SUN¹,
Lei XIE^{1, 2}

1.
The 54th Research Institute of CETC, Shijiazhuang 050081, China
2.
Science and Technology on Antenna and Microwave Laboratory, Xidian University, Xi’an 710071, China

Funds: The National High Technology Research and Development Program of China (2014AA123601), The Bilateral Inter-Governmental Science and Technology Cooperation Proposal of China (2016YFE0100100)

摘要

摘要:
在射電望遠(yuǎn)鏡和衛(wèi)星通信天線中，圓極化器是關(guān)鍵部件之一。傳統(tǒng)圓極化器在保證0.75 dB軸比時(shí)的相對(duì)帶寬最多為41%，無法滿足日益增長的寬頻帶應(yīng)用需求。該文利用四脊波導(dǎo)的寬帶特性，通過采用具有不同尺寸的水平脊和垂直脊，使四脊波導(dǎo)兩個(gè)正交主模的相位常數(shù)不同，來實(shí)現(xiàn)寬帶移相特性，并給出了一種寬帶四脊波導(dǎo)圓極化器的設(shè)計(jì)方法。按照這一方法，設(shè)計(jì)了一款寬帶C波段圓極化器，工作帶寬為3.625～7.025 GHz，相對(duì)帶寬64%。該文還研究了圓極化器主要參數(shù)變化對(duì)其性能的影響，加工并實(shí)測了一個(gè)圓極化器樣機(jī)。實(shí)測結(jié)果顯示出，該圓極化器兩個(gè)正交極化的反射損耗均小于–21 dB，相差90°±3.8°，相應(yīng)的軸比小于0.6 dB。測試與仿真結(jié)果吻合良好，證明了分析與設(shè)計(jì)方法的正確性。
- 天線 /
- 圓極化器 /
- 寬頻帶 /
- 四脊波導(dǎo) /
- 敏感性分析
Abstract:
Circular polarizer is a key component in feed systems with circular polarization in radio astronomy telescope and satellite communication antennas. Conventional polarizers are capable of operating over a maximum bandwidth of 40% with an axial ratio value of 0.75 dB, which is unable to meet the growing demand for wide band applications. In this paper, the design of the wide band quad ridges waveguide polarizer is introduced, and the relationship between the phase constants of two orthogonal principal modes is analyzed. The broadband phase shift characteristics are achieved by employing different horizontal and vertical ridges dimensions. Based on this method, a C-Band polarizer is designed, which operates at 3.625～7.025 GHz, 64% bandwidth. The effects of main parameters on the polarizer performances are studied. A prototype of the polarizer is developed. The measurements of the prototype show that return losses are less than –21 dB for two orthogonal polarizations and the phase difference is 90°±3.8°, the corresponding axial ratio is less than 0.6 dB. Measured and simulated results show good agreements, thus validating the analysis and design methods.
- Antenna /
- Circular polarizer /
- Wideband /
- Quad-ridge waveguide /
- Sensitivity analysis

HTML全文

圖 1 四脊波導(dǎo)圓極化器結(jié)構(gòu)示意圖

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圖 2 四脊波導(dǎo)TE₁₀和TE₀₁模場分布圖

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圖 3 四脊波導(dǎo)圓極化器仿真模型

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圖 4 相位常數(shù)隨頻率的變化曲線

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圖 5 垂直脊厚度s₁對(duì)圓極化器性能的影響圖

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圖 6 水平脊厚度s₂對(duì)圓極化器性能的影響

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圖 7 垂直脊間距d₁對(duì)圓極化器性能的影響

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圖 8 水平脊間距d₂對(duì)圓極化器性能的影響

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圖 9 圓極化器結(jié)構(gòu)與加工工藝設(shè)計(jì)

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圖 10 s₁, s₂, d₁, d₂誤差均為+0.03 mm或?yàn)楱C0.03 mm情況下對(duì)圓極化器性能影響

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圖 11 s₁, d₂誤差為+0.03 mm, s₂, d₁為–0.03 mm和s₁, d₂為–0.03 mm, s₂, d₁為+0.03 mm情況下對(duì)圓極化器性能影響

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圖 12 圓極化器樣機(jī)照片和性能仿真與測試結(jié)果

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表 1 四脊波導(dǎo)結(jié)構(gòu)參數(shù)值(mm)

參數(shù)	a	b	d₁	d₂	s₁	s₂
數(shù)值	45	45	13	31	7	4

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表 2 四脊波導(dǎo)圓極化器主要參數(shù)表(mm)

參數(shù)	a	b	d₁	d₂	s₁	s₂	L
數(shù)值	47.13	47.13	12.93	32.24	6.84	4.67	207

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表 3 四脊波導(dǎo)圓極化器與其他型式圓極化器的實(shí)測性能比較

圓極化器類型	相對(duì)帶寬(%)	反射損耗(dB)	相位平坦度	軸比(dB)	來源
螺釘極化器	15	≤ –20	90°±3°	≤ 0.50	文獻(xiàn)[4,5]
介質(zhì)極化器	25	≤ –20	90°±4.5°	≤ 0.75	文獻(xiàn)[6,7]
波紋極化器	41	≤ –24	90°±4°	≤ 0.60	文獻(xiàn)[8–10]
隔板極化器	23	≤ –25	90°±5°	≤ 0.75	文獻(xiàn)[11–16]
雙脊極化器	15	≤ –25	90°±3°	≤ 0.50	文獻(xiàn)[17,18]
四脊極化器	64	≤ –21	90°±3.8°	≤ 0.60	本文

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