Low-RCS, High-Gain, and Wideband Mushroom Antenna

In this letter, a high-gain and wideband mushroom antenna with wideband low radar cross section (RCS) is presented. The mushroom structure is resonant at the antenna operating frequency, and the in-band RCS can be reduced significantly. The bandstop frequency selective surface (FSS) designed at the operating frequency of the antenna is used to replace the metallic ground of the antenna so that the out-of-band RCS of the proposed antenna can be reduced while maintaining the high gain. Furthermore, square metallic patches printed periodically below the cells of the FSS are utilized to add a new zero-degree reflection phase in the desired frequency range to enhance the bandwidth of RCS reduction. As a result, a wideband RCS reduction can be achieved both in and out of antenna operating frequency band. The results show that the RCS of the proposed antenna is dramatically reduced over a wide frequency range, compared to the traditional patch antenna.

[1]  John F. Shaeffer,et al.  Radar Cross Section , 2004 .

[2]  Xiangang Luo,et al.  A Low-RCS and High-Gain Partially Reflecting Surface Antenna , 2014, IEEE Transactions on Antennas and Propagation.

[3]  D. C. Jenn,et al.  Radar and laser cross section engineering , 2005 .

[4]  Xianming Qing,et al.  Metamaterial-Based Low-Profile Broadband Mushroom Antenna , 2014, IEEE Transactions on Antennas and Propagation.

[5]  R. Hansen.  Relationships between antennas as scatterers and as radiators , 1989, Proc. IEEE.

[6]  Ying Liu,et al.  Application of Bionics in Antenna Radar Cross Section Reduction , 2009, IEEE Antennas and Wireless Propagation Letters.

[7]  Vincent Fusco,et al.  RCS reduction technique for reflectarray antennas , 2003 .

[8]  Filippo Costa,et al.  Wideband Radar Cross Section Reduction of Slot Antennas Arrays , 2014, IEEE Transactions on Antennas and Propagation.

[9]  Ben A. Munk,et al.  Frequency Selective Surfaces: Theory and Design , 2000 .

[10]  R. Stephenson.  A and V , 1962, The British journal of ophthalmology.

[11]  R. Green,et al.  The general theory of antenna scattering , 1963 .

[12]  Naichang Yuan,et al.  Application of metamaterials to ultra-thin radar-absorbing material design , 2005 .

[13]  Y. Jia,et al.  Printed UWB End-Fire Vivaldi Antenna with Low RCS , 2013 .

[14]  W.-T. Wang,et al.  RCS Reduction of Array Antenna by Using Bandstop FSS Reflector , 2009 .

[15]  N. Yuan,et al.  RCS Reduction of Ridged Waveguide Slot Antenna Array Using EBG Radar Absorbing Material , 2008 .

[16]  F. Costa,et al.  Low-Profile Array With Reduced Radar Cross Section by Using Hybrid Frequency Selective Surfaces , 2012, IEEE Transactions on Antennas and Propagation.

[17]  Youquan Li,et al.  RCS Reduction of Ridged Waveguide Slot Antenna Array Using EBG Radar Absorbing Material , 2008, IEEE Antennas and Wireless Propagation Letters.