New radiated immunity test method using fields of low speed rotation

A new method of radiated immunity testing using fields of low speed rotation is described. The rotating electromagnetic fields are generated by using two orthogonal antennas fed by two different double-side-band waves. In this method, the incident fields exciting equipment can rotate at an arbitrary low speed, so more effective immunity measurement may be conducted: e.g. immunity profile of equipment under test. Basic properties of the fields by two types of orthogonal antennas are measured. Experimental results show that the excited fields have a flat region and rotate correctly