Vkv-FM Band

87,5 - 108 MHz

VHF FM transmitting antenna systems up to 10 kW

Those antenna systems are destined for broadcasters, transmitting with low or medium power. Systems may be fastened to low mast or on roof of high building. Polarization horizontal.

Basic components of antenna systems are as follows:

• Antenna units
• Coaxial junctions

In following table examples of non-directional antenna systems installed on tube mast of dia 160 mm (see figure) using the antenna units ADB 4110 are presented.

Antenna units	Number of bays	Number of au	Gain dBd / times	Polarization	VSWR ≤	Input power	Total height L [m]
ADB 4110	2	2	4,1 / 2,6	H	1,2	2 kW	1,5
	3	3	5,8 / 3,8	H	1,2	2 kW	3,0
	4	4	7,1 / 5,1	H	1,2	2 kW	4,5

VHF FM transmiting antenna systems over 10 kW

87,5 - 108 MHz

Those antenna systems are destined for larger transmitting stations. The systems are mounted on steel structure of three or four sides or tube. Polarization horizontal or vertical. Some of the antenna systems are destined for CCIR FM band other can be used simultaneously in CCIR and OIRT FM band.

Basic components of antenna systems are as follows:

• Antenna units
• Coaxial power dividers
• Impedance transformers
• Matching lines
• Coaxial feeders
• Coaxial elbows
• Coaxial junctions

In following table examples of non-directional antenna systems installed on mast with square cross-section and using the antenna units ADB 4501 are presented.

Antenna units	Number of bays	Number of au	Gain dBd / times	Polarization	VSWR ≤	Input power	Total height L [m]
ADB 4630	4	16	9.1 / 8.1	H	1,2	32 kW	11,6
	6	24	10.8 / 12	H	1,2	48 kW	17,4
	8	32	12.1 / 16.2	H	1,2	54 kW	23,2