论文信息 - Bandwidth enhancement of HF antennas mounted on military platforms using a Characteristic-Modes-Based Design Approach

Bandwidth enhancement of HF antennas mounted on military platforms using a Characteristic-Modes-Based Design Approach

Narrow bandwidth is a challenging problem for designing platform-mounted electrically small antennas in the high-frequency (HF) band. In this paper, we demonstrate a process that can be used to improve the bandwidth of a platform-mounted HF antenna or antennas by taking advantage of the presence of the platform. Specifically, we examine a simplified model for the Expeditionary Fighting Vehicle (EFV) and examine how the mounted antennas can be used to excite a desired natural resonant mode of this platform for bandwidth enhancement. The proposed approach is employed to successfully enhance the bandwidth of horizontally-polarized HF loop antennas from 0.64% to 0.79% and 0.89%, by using respectively one, two, or four half loop antennas to excite the desired mode of the EFV.

Nader Behdad | Ting-Yen Shih

[1] M. Cabedo-Fabres,et al. The Theory of Characteristic Modes Revisited: A Contribution to the Design of Antennas for Modern Applications , 2007, IEEE Antennas and Propagation Magazine.

[2] G. Marrocco,et al. Naval structural antenna systems for broadband HF communications , 2006, IEEE Transactions on Antennas and Propagation.

[3] S. R. Best. On the use of scale brass models in HF shipboard communication antenna design , 2002 .

[4] Chao-Fu Wang,et al. HF Band Shipboard Antenna Design Using Characteristic Modes , 2015, IEEE Transactions on Antennas and Propagation.

[5] A. E. Spezio. Electronic warfare systems , 2002 .

[6] L. J. Chu,et al. Physical limitations of omnidirectional antennas , 1948 .

[7] G. Marrocco,et al. Naval Structural Antenna Systems for Broadband HF Communications—Part III: Experimental Evaluation on Scaled Prototypes , 2008, IEEE Transactions on Antennas and Propagation.

[8] A.G.P. Boswell,et al. Iterative calculation of ship-borne HF antenna performance , 1991 .

[9] G. Marrocco,et al. Naval Structural Antenna Systems for Broadband HF Communications—Part II: Design Methodology for Real Naval Platforms , 2006, IEEE Transactions on Antennas and Propagation.