Broadband Approximations for Doubly Curved Reflector Antenna

The broadband approximations for shaped- beam doubly curved reflector antennas with primary feed (rectangular horn) producing uniform amplitude and phase aperture distribution are derived and analyzed. They are very valuable for electromagnetic compatibility analy- ses both from electromagnetic interference and suscepti- bility point of view, because specialized more accurate methods such as physical optics are only used by antenna designers. To allow quick EMC analyses, typical values, beamwidth changes, sidelobe levels and aperture efficien- cies are given for frequency changes approximately up to four times operating frequency. A comparison of approxi- mated and measured patterns of doubly curved reflector antennas shows that the given approximation could be reliably used for analyses of pattern changes due to very broad frequency changes.

[1]  Analysis Theory for the Shaped-Beam Doubly Curved Reflector Antenna , 1969 .

[2]  Jiřı́ DŘÍNOVSKÝ,et al.  Simple Models of EMI Filters for Low Frequency Range , 2008 .

[4]  John L. Volakis,et al.  Antenna Engineering Handbook , 2007 .

[5]  Irene A. Stegun,et al.  Handbook of Mathematical Functions. , 1966 .

[6]  S. Silver.  Microwave antenna theory and design , 1949 .

[7]  Vladimir Schejbal,et al.  Czech radar technology , 1994 .

[8]  R. Dolecek,et al.  Estimation of Antenna Gain , 2009, IEEE Antennas and Propagation Magazine.

[9]  P. Bezousek,et al.  Radar technology in the Czech Republic , 2004, 14th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2002. Conference Proceedings (IEEE Cat.No.02EX562).

[10]  T. Milligan.  Modern Antenna Design , 1985 .

[11]  Akira Ishikawa,et al.  About the Authors , 2001 .

[12]  Vladimir Schejbal,et al.  Antenna Beamwidth Control [Antenna Designer's Notebook] , 2010, IEEE Antennas and Propagation Magazine.

[13]  Vladimir Schejbal,et al.  Directivity of planar antennas , 1999 .