TY - JOUR A1 - Armbrecht, G. A1 - Klemp, O. A1 - Eul, H. T1 - Spherical mode analysis of planar frequency-independent multi-arm antennas based on its surface current distribution JO - Adv. Radio Sci. J1 - ARS VL - 4 SP - 25 EP - 32 Y1 - 2006/09/04 PB - Copernicus Publications SN - 1684-9965 UR - http://www.adv-radio-sci.net/4/25/2006/ L1 - http://www.adv-radio-sci.net/4/25/2006/ars-4-25-2006.pdf ER -