Product technical dataProduct name::VHF dual dipole TV transmission
antennaEquipment model:ZRVHF-2OEquipment origin:Jiangsu
Manufacturer:Confucianism Nanjing Radio and Television Equipment
Co., Ltd One. Product function introduction1. Antenna
material the outer tube of antenna vibrator is made of "304"
high-quality stainless steel tube with a wall thickness of 2.4mm;
The conductor and feed system in the antenna are made of
high-quality H62 brass silver plated; The reflective plate is made
of 304 high-quality stainless steel pipe with wall thickness ≥ 2mm;
All connecting bolts of antenna are high-quality stainless steel;
The reflecting plate can withstand the trampling of the
installation workers, and the pipe diameter and mechanical strength
can ensure that no permanent deformation or damage will be caused
when the wind speed is ≥ 200 km/h;2. Power
distributor materialthe outer conductor is made of
high-quality H62 fine-drawn brass tube with nickel plating, and the
flange is also made of copper with nickel plating for corrosion
protection; The inner conductor is high-quality H62 fine-drawn
brass tube with silver plating treatment;3. The power
distributor adopts 90 ° phase shifter technology; Input
impedance is 50 Ω;4. Insulation material:
polytetrafluoroethylene;5. Installation components: high-quality A3
steel hot-dip galvanized;6. Antenna installation connecting bolts:
high-quality 304 stainless steel bolts;7. The antenna feeder system
will charge dry air into the whole feed system until the antenna
dipole input port.8. The whole set of antenna has undergone
pressure test, waterproof and anti-rust treatment. Joint sealing:
Our professional and technical personnel operate sealing treatment
on the tower. Waterproof treatment is equal to the following
requirements: place vulcanized sealing ring in the antenna joint;
The installation of antenna connector shall be filled with
waterproof thread sealant; Wrapped with waterproof self-adhesive
tape for outdoor use; Finally, the rubber heat-shrinkable sleeve is
used externally for heat shrinkage.9. Waterproof structure
treatment of antenna unit: our company adopts effective sealing and
waterproof treatment. The middle of the vibrator of the antenna
unit is crimped and sealed with high and low temperature resistant
polytetrafluoroethylene thread encryption sealing ring, which is
anti-smashing and anti-cracking, to ensure the waterproof
performance of the antenna unit.10. Airtightness of the antenna
feeder system: our company fills the input end of the main feeder
cable of the antenna feeder system in the transmitter room with dry
air at the pressure of 30 kpa, and the drop is less than 5 kpa in
24 hours.11. DC resistance and insulation resistance of antenna
feeder system:(1) DC resistance of antenna feeder system: 100 m,
not more than 0.1 Ω;(2)Insulation resistance of antenna feeder
system: main feeder, power distributor, sub-feeder, etc. (in case
of no short circuit point) shall not be less than 500M Ω, and
antenna unit (in case of no short circuit point) shall not be less
than 50M Ω.The feed structure of antenna unit is simple, without
short circuit clamp to adjust the standing wave ratio, with good
consistency and high efficiency. The antenna radiator is integrally
welded, with high mechanical strength and strong wind and water
resistance. The interface of antenna unit is IF45 flange, which has
large power capacity. The middle of the vibrator is crimped and
sealed with polytetrafluoroethylene (plastic king) thread, which is
resistant to high and low temperatures, smashing and cracking, and
aging. Even in severe weather conditions such as strong wind and
ice coating, the antenna will not be damaged, resulting in a
broadcast outage. This antenna is particularly suitable for
high-power mountain stations in harsh weather conditions.All
indicators of the antenna system comply with the standards of GY/T
5088-2013 Technical Indicators and Measurement Methods for
Television and FM Broadcasting Transmission Sky Feeder System.Two.
Technical parameters of antenna system:1.Antenna form: VHF dual
dipole TV transmission antenna;2. Frequency range: 167~223MHz
(available in full frequency band);3. Polarization mode: vertical
polarization (or horizontal polarization);4. Antenna feeder
impedance: 50 Ω.5. Standing wave ratio: within the range of
167~223MHz, at the input end of the main rheostat of the antenna
system (excluding the main feeder) ≤ 1.05; At the input end of the
antenna feeder system (including the main feeder) ≤ 1.08.6. Antenna
gain: G4 layer 4 ≥ 7.6dBd, unit board gain: 7.3db.7. Antenna power
capacity and interface: antenna system power capacity ≥
1-30KW;Antenna unit interface: 7/8 ″ flange
(IF45-50K)/L27-50KF/L29-50JF;Branch feeder model: 7/8 ″;Antenna
system input interface: 3 1/8 ″ flange (IF110-50K);8. Antenna field
type(1) Antenna horizontal plane field shape: out-of-roundness
10%;(3) Provide horizontal and vertical field diagrams, and meet
the coverage requi
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