低RCS寬帶磁電偶極子貼片天線設(shè)計
doi: 10.11999/JEIT150897
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1.
(空軍工程大學(xué)信息與導(dǎo)航學(xué)院 西安 710077) ②(西安通信學(xué)院 西安 710106)
國家自然科學(xué)基金(61271100, 61471389, 61501494),陜西省自然科學(xué)基礎(chǔ)研究計劃項目(2012JM8003)
Low Radar Cross Section and Broadband Magneto-electric Dipole Patch Antenna
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1.
(Information and Navigation College, Air Force Engineering University, Xi&rsquo
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2.
(Xi,an Communications Institute, Xi&rsquo
The National Natural Science Foundation of China (61271100, 61471389, 61501494), Natural Science Basic Research of Shaanxi Province, China (2012JM8003)
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摘要: 該文設(shè)計了一種低雷達散射截面(RCS)的寬帶磁電偶極子貼片天線,其中印刷在介質(zhì)板上的金屬貼片為電偶極子,3個金屬過孔連接輻射貼片與金屬地板構(gòu)成磁偶極子。整個天線采用T型漸變饋電結(jié)構(gòu)同時激勵電偶極子與磁偶極子,天線的頻帶范圍為7.81~13.65 GHz,覆蓋了整個X波段。實測和仿真結(jié)果表明,通過在磁電偶極子貼片天線底面采用開槽技術(shù)并優(yōu)化開槽的形狀、大小、位置等變量,在天線工作頻帶范圍內(nèi)實現(xiàn)了RCS的減縮,最大縮減量達到了17.9 dB,同時天線保持了增益穩(wěn)定不變,E面、H面方向圖一致的特性。Abstract: A low Radar Cross Section (RCS) and broadband Magneto-Electric (ME) dipole patch antenna from 7.81 GHz to 13.65 GHz covering the whole X band is designed and fabricated. Metal patches printed on the substrate form the electric dipoles, three metallic vias connected to the radiation patches and the metal ground account for the magnetic dipole radiation. The whole antenna is connected with a T-shaped feed structure which excites electric and magnetic dipoles simultaneously. Numerical and experimental results incident that the RCS of the ME dipole patch antenna can be reduced in the whole bandwidth which the largest value is up to 17.9 dB by cutting slots on the ground and optimizing the size, shape, position of the slots. Also, the antenna shows advanced performances such as stable gain and almost consistent pattern in E and H plane.
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Key words:
- Magneto-Electric (ME) dipole antenna /
- Broadband /
- Cutting slot technique /
- low RCS /
- Consistency
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