User's Manual

THALES Communications
OIM
AHV1600-SYSTEM
Page 122
July 16/09
C. FUNCTIONAL CHARACTERISTICS
– Operating frequency band: 4.2 GHz – 4.4 GHz.
– Match:
•
••
•
The return loss on 50 ohms complies with the following diagram
−
Isotropic gain:
•
••
•
≥ 7 dBi from 4.2 GHz to 4.4 GHz
−
Radiation pattern:
Half-power beamwidth (- 3 dB):
•
••
•
Roll (E-Plane) : 60°
±
7°
•
••
•
Pitch (H-Plane) : 50° ± 5°
NOTE:
The E-plane is perpendicular to the direction of the straight line painted on the external antenna front
face.
The H-plane is parallel to the direction of the straight line.
– Decoupling:
•
••
•
The decoupling value for a distance of 0.4 m between antenna centres is ≥ 72 dB.
– Grounding:
•
••
•
The resistance between connector core and its shielding is < 0.05 ohm.
5. COAXIAL CABLES LENGHT
(1) RECOMMENDED CABLE TYPE ( ACCORDING TO MIL.C 17F SPECIFICATION )
Double screened coaxial is essential to avoid RF leakage.