中国物理B ›› 2010, Vol. 19 ›› Issue (12): 127301-127301.doi: 10.1088/1674-1056/19/12/127301

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Transmission properties of frequency selective structures with air gaps

蒙志君, 王立峰, 吕明云, 武哲   

  1. School of Aeronautic Science & Engineering, Beihang University, Beijing 100191, China
  • 收稿日期:2010-05-02 修回日期:2010-06-24 出版日期:2010-12-15 发布日期:2010-12-15
  • 基金资助:
    Project supported by the Major Research Plan of the National Natural Science Foundation of China (Grant No. 90305026).

Transmission properties of frequency selective structures with air gaps

Meng Zhi-Jun(蒙志君)†, Wang Li-Feng(王立峰), Lü Ming-Yun(吕明云), and Wu Zhe(武哲)   

  1. School of Aeronautic Science & Engineering, Beihang University, Beijing 100191, China
  • Received:2010-05-02 Revised:2010-06-24 Online:2010-12-15 Published:2010-12-15
  • Supported by:
    Project supported by the Major Research Plan of the National Natural Science Foundation of China (Grant No. 90305026).

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摘要： The transmission properties of compound frequency selective structures with dielectric slab and air gaps were investigated by computation and experimentation. Mechanism analyses were also carried out. Results show that the air gaps have a distinct influence on the transmission properties. Resonant frequency of the structure would increase rapidly when the air gap appears. After the gap gets larger to a specific value, generally 1/5 wavelength corresponding to the resonant frequency, the transmission properties would change periodically with the gap thickness. The change of transmission properties in one period has a close relationship with the dielectric thickness. These results provide a new method for designing a bandpass radome of large incidence angle and low loss with the concept of stealth shield radome.

Abstract: The transmission properties of compound frequency selective structures with dielectric slab and air gaps were investigated by computation and experimentation. Mechanism analyses were also carried out. Results show that the air gaps have a distinct influence on the transmission properties. Resonant frequency of the structure would increase rapidly when the air gap appears. After the gap gets larger to a specific value, generally 1/5 wavelength corresponding to the resonant frequency, the transmission properties would change periodically with the gap thickness. The change of transmission properties in one period has a close relationship with the dielectric thickness. These results provide a new method for designing a bandpass radome of large incidence angle and low loss with the concept of stealth shield radome.

Key words: air gap, frequency selective structure, periodic array, radome

中图分类号:  (Thin film structure and morphology)

  • 68.55.-a