Integrated Structural Electromagnetic Analysis of Mesh Reflectors with Structural Random Dimensional Errors

A new procedure for the integrated structural electromagnetic analysis of cable mesh reflectors with structural random dimensional errors is presented. The procedure combines the integrated structural electromagnetic analysis with reliability analysis and aims to investigate the effects of structural random dimensional errors on the antenna far-field directivity pattern. Both the antenna far-field directivity pattern and structural member dimensions are taken as random variables in this procedure. The computational expressions of the mean value and variance of the far-field directivity are developed by means of the random factor method and the random variable’s functional moment method. The influences of structural random dimensional errors on the randomness of radiation directivity pattern are inspected via an offset cable mesh reflector.

[1]  Yahya Rahmat-Samii,et al.  Random surface error effects on offset cylindrical reflector antennas , 2003 .

[2]  J. Hedgepeth.  Influence of fabrication tolerances on the surface accuracy of large antenna structures , 1982 .

[3]  J. Hedgepeth.  Accuracy potentials for large space antenna reflectors with passive structure , 1982 .

[4]  Mark W. Thomson,et al.  ASTROMESH™ DEPLOYABLE REFLECTORS FOR KU- AND KA-BAND COMMERCIAL SATELLITES , 2002 .

[5]  Mingtao Cui,et al.  Probabilistic dynamic analysis of truss structures , 2002 .

[6]  Y. Rahmat-Samii,et al.  Characterization of effects of periodic and aperiodic surface distortions on membrane reflector antennas , 2005, IEEE Transactions on Antennas and Propagation.

[7]  Yahya Rahmat-Samii,et al.  Beam squint determination in conic-section reflector antennas with circularly polarized feeds , 1991 .

[8]  Jen-Kuang Huang,et al.  Integrated control of thermally distorted large space antennas , 1990 .

[9]  Hong Bao,et al.  Shape adjustment of cable mesh antennas using sequential quadratic programming , 2013 .

[10]  J. Ruze.  Antenna tolerance theory—A review , 1966 .

[11]  Tadashi Takano,et al.  Large deployable antenna with cable net composition for satellite use , 2000 .

[12]  Y. Rahmat-Samii,et al.  Advanced precipitation Radar antenna: array-fed offset membrane cylindrical reflector antenna , 2005, IEEE Transactions on Antennas and Propagation.

[13]  Raphael T. Haftka,et al.  Integrated structural electromagnetic shape control of large space anatenna reflectors , 1989 .

[14]  Bernard Maurin,et al.  Numerical form-finding of geotensoid tension truss for mesh reflector , 2012 .

[15]  L. Hollaway,et al.  Integrated structure-electromagnetic optimization of large reflector antenna systems , 1998 .

[16]  Li Dongxu,et al.  Engineering Notes Simple Technique for Form-Finding and Tension Determining of Cable-Network Antenna Reflectors , 2013 .

[17]  P. Lam,et al.  Directivity optimization of a reflector antenna with cluster feeds: A closed-form solution , 1985 .

[18]  Mehran Mobrem.  Methods of Analyzing Surface Accuracy of Large Antenna Structures due to Manufacturing Tolerances , 2003 .

[19]  Wei Gao,et al.  Dynamic Response Analysis of Stochastic Frame Structures Under Nonstationary Random Excitation , 2004 .

[20]  Tianshu Liu,et al.  Heat-Flux Measurements with Temperature-Sensitive Paint in a Mach-6 Quiet Tunnel , 2013 .

[21]  Hong Bao,et al.  Sensitivity Analysis of Reflector Antennas and Its Application on Shaped Geo-Truss Unfurlable Antennas , 2013, IEEE Transactions on Antennas and Propagation.

[22]  Jin Mitsugi,et al.  A modular cable‐mesh deployable structure for large‐scale satellite communication antennas , 1994 .

[23]  Byung-Sung Kim,et al.  Computation of the average power pattern of a reflector antenna with random surface errors and misalignment errors , 1996 .

[24]  Yahya Rahmat-Samii,et al.  A comparison between GO/aperture-field and physical-optics methods of offset reflectors , 1984 .