, Electrical Characteristics 
i) Resonate Frequency : 2.4~2.5/4.9~5.825 GHz 
ii) Impedance : 50 ohm Nominal 
iii) Radiation Pattern : Omni Directional 
iv) Polarization :  Vertical 
v) Standing Wave Ratio (S.W.R):   3.5 or less 
vi) Insulation resistance  :   500 M ohm at DC 500V  

vii) Return Loss:   -5.0dB Max 

2, Mechanical characteristics: 
The strength of fixing between sleeve and stud shall withstand the following stresses 
Vertical Direction:  2.0   kgs

Rotating Direction:  2.0   kgcm