海外
| Eimac | http://www.eimac.com/eimhome.htm |
| GAP Antenna | http://www.gapantenna.com/ |
| HFx/Propagation prediction tool | http://www.psrv.com/hfx/ |
| Hy-Gain Antenna | http://www.hy-gain.com/hy-gain/index.htm |
| JPS Communications,Inc | http://www.jps.com |
| MFJ Enterprises.Inc. | http://www.mfjenterprises.com |
| Rockwell International | http://www.rockwell.com/ |
| SGC Inc. | http://www.sgcworld.com |
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