Analysis and Experimental Study on Dynamic Behavior of Stepper-Actuated Dual-Axis Data Transmission Antenna

Table 1

Modal frequency and mode shape of the data transmission antenna.

Order	Frequency/Hz	Mode shapes
1	7.924	The combination torsion around -axis
2	12.209	First-order bending of the support arm in plane
3	17.860	First-order bending of the support arm in plane
4	52.337	Tension of the combination along the -axis
5	89.975	Second-order bending of the support arm in plane
6	112.781	Second-order bending of the support arm in plane
7	118.847	Bending of the reflector