1, Electrical Characteristics 
i) Resonate Frequency :2.4~2.5  GHz 
ii) Impedance : 50 ohm Nominal 
iii) Radiation Pattern : Omni Directional 
iv) Polarization :  Vertical 
v) Standing Wave Ratio (S.W.R):   2.0 or less  at Resonate point  
vi) Insulation resistance  :   500 M ohm at DC 500V 

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

3, Others: 
Any modification of this specification has to be agreed by us