Antenna of vertical polarization of IV-V TV ranges “Collinear”

Antenna of vertical polarization of IV-V TV ranges “Collinear”

PURPOSE AND STRUCTURE

Antenna is used for TV broadcasting in one channel of IV-V TV ranges under vertical polarization of radiating field. Structurally antenna is a

collinear aerial array from coaxial vibrators protected from thunderstorms. From external actions the aerial array is protected by radio transparent covering. Antenna is installed on the top of a tower or a roof of a high building. If necessary, antenna can be installed on the band of the bearing (tower) by means of brackets.

In order to give directivity to the antenna at horizontal surface reflector is used.

Amplification constant of the antenna increases approximately at 2 dB.

Lightning protection is provided by direct bonding at direct current of the antenna with the earthing loop of the bearing.

TECHNICAL CHARACTERISTICS

CHARACTERISTIC	Modification of the antenna
	Collinear-1	Collinear- 2
Working frequencies band	470 – 790
The bond of the working frequencies, MHz.	28 within the range
VSWR at the strap of working frequencies	? 1,2
Polarization	Vertical
DD at horizontal surface	Circular or directed
Feed impedance, ohm	50 (75)
Input connector	Upon customer’s choice
Quantity of active vibrators	4	8
Amplification constant relative to isotropic radiator under circular DD, dB	8	11

Total input capacity, kW	2	5,0
Height of the antenna, mm	2300-3400	3200-5300

DD in horizontal surface

DD at vertical surface