ಬ್ಯಾಂಡ್ III (014 MHz ನಿಂದ 167 MHz) ಪ್ರಸಾರಕ್ಕಾಗಿ FMUSER VHF ಸ್ಲಾಟ್ ಆಂಟೆನಾ HD-RDT-223

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ಮಾದರಿ  HD-RDT-014 
ಆವರ್ತನ ಶ್ರೇಣಿ  167 - 223 ಮೆಗಾಹರ್ಟ್ z ್ 
ಧ್ರುವೀಕರಣ  ಅಡ್ಡ 
ಲಾಭ (4 ಸ್ಲಾಟ್‌ಗಳು) 9.5 ಡಿಬಿ 
VSWR  ≤ 1.10 (8 MHz) 
ಇನ್ಪುಟ್ ಕನೆಕ್ಟರ್ಸ್  7 / 8ಇಐಎ  1 5 / 8ಇಐಎ 
ಗರಿಷ್ಠ ಪ್ರತಿ ಫಲಕಕ್ಕೆ ಶಕ್ತಿ  2 ಕಿ.ವಾ.  3 ಕಿ.ವಾ. 
ಪ್ರತಿರೋಧ  50 Ω 
ತೂಕ  30 ಕೆಜಿ 
ಗರಿಷ್ಠ ಗಾಳಿಯ ವೇಗ  36 ಮೀ / ಸೆ 
ನಿರೋಧಕ ವಸ್ತು  ಟೆಫ್ಲಾನ್ 
ವಿಕಿರಣ ಅಂಶ ವಸ್ತು  ಅಲ್ಯೂಮಿನಿಯಂ ಮಿಶ್ರಲೋಹ 
ರೇಡೋಮ್ ವಸ್ತು  ಫೈಬರ್ಗ್ಲಾಸ್ 

ಕೊಟೇಶನ್ ಕೇಳಿ

What is a VHF Slot Antenna and How does it Work?

 

The VHF slot antenna is one of the most common broadcast antennas designed for radio transmission in the VHF band. It is mainly used in TV broadcasting applications in the frequency range of 167-223 MHz. 

 

FMUSER band III VHF slot antenna for VHF broadcast station

 

The VHF slot antenna has horizontal polarization, omnidirectional horizontal radiation pattern, and narrow vertical radiation pattern, which is very suitable for digital and analog broadcasting.

 

ಡಿಸೈನ್

 

The VHF slot antenna is mainly composed of the radiation cavity installed in the stainless steel structure. 

 

The antenna cavity and the stainless steel frame constitute the main body of the VHF slot antenna. The cavity is made of aluminum alloy, and four radiating elements form a rectangular aluminum resonator.

 

Horizontal radiation patterns of FMUSER band III VHF slot antenna

 ಕೊಟೇಶನ್ ಕೇಳಿ

 

When designing the cavity, our engineering team fully considered zero filling interpolation and beam tilt: 

 

  1. Tilt angle: 0.5 degrees
  2. Antenna gain: 11 dB
  3. Radiation (Horizontal): omnidirectional.

 

The stainless steel frame has the functions of installation and fastening to ensure the stability of the radiation cavity, and also has the functions of radiation and light protection. 

 

Since the large cavity is easy to deform, the stainless steel frame can ensure the hardness and stability of the radiation cavity. 

 

Horizontal directions diagram of FMUSER band III VHF slot antenna

 

The stainless steel frame can be directly fixed on the side of the tower without changing the shape of the cavity.

 

ರಚನೆ

 

In general, the structure of a VHF slot antenna is relatively simple and generally consists of the following elements:

 

  • ಬಲವರ್ಧನೆಯ ಉಕ್ಕು
  • ರಕ್ಷಣೆ ಕವರ್
  • Rigid feed
  • ಬ್ರಾಕೆಟ್
  • ಇನ್ಪುಟ್ ಪೋರ್ಟ್
  • ಬೆಂಬಲ ಫ್ರೇಮ್
  • Antenna main body
  • Fiberglass cover

 

ಕೊಟೇಶನ್ ಕೇಳಿ

 

the-structure-of-fmuser-band-iii-vhf-slot-antenna-700px.jpg

 

ವಸ್ತು

 

In terms of materials, our VHF slot antennas are manufactured from the following materials:

 

  • Marine brass
  • ಕಾಪರ್
  • ಅಲ್ಯೂಮಿನಿಯಮ್
  • Virgin Teflon

 

What Consists of a Complete VHF Slot Antenna System?

 

The following are the most basic VHF slot ಆಂಟೆನಾ ವ್ಯವಸ್ಥೆ ಘಟಕಗಳು:

 

  1. Independently fed VHF slot antenna
  2. The protection slot (slot cover or sealed full radome)
  3. Antenna coaxial cable (usually feeder cable, e.g.1-5/8'' coax)
  4. Pressurized feeder cable
  5. Antenna Mounting Mast/Bracket

  

Want to learn more? Please ಸಂಪರ್ಕದಲ್ಲಿರಲು with our sales team!

 

Of course, in addition to this equipment, during the installation process, you still need to pay attention to:

 

  1. Antenna installation location. You can mount our VHF slot antennas either on top of the tower, on the side of the tower, or upside down. If mounted on the side, consider tower width or mast diameter for good horizontal radiation. In general, VHF wavelengths are longer and mast diameter has little effect.
  2. For greater benefit. Stack two or more antennas vertically. Reasonable selection of the transmission line length of the line converter and the coaxial feeder between nodes can better solve the problems of zero-fill interpolation and beam tilt.
  3. ನೆಲದ ಎತ್ತರ
  4. Antenna installation height

 

FMUSER: High Gain VHF Slot Antenna Manufacturer

 

FMUSER has provided hundreds of TV broadcasters around the world with turnkey solutions that combine performance and flexibility, including high-quality slot antenna kits, online installation instructions, complete after-sales service, etc. 

 

We ensure your slot The antenna will be precisely matched to your broadcast tower and will continue to serve you for decades at maximum broadcast performance.

 

ನಮ್ಮ ಉತ್ಪನ್ನಗಳ ಮುಖ್ಯ ಲಕ್ಷಣಗಳು

 

  • ಬ್ಯಾಂಡ್ III (167-223 MHz)
  • The reliable manufacturing process (manufactured from brass, copper, aluminum, and virgin PTFE)
  • ಹೆವಿ ಡ್ಯೂಟಿ ವಿನ್ಯಾಸ (ತುಕ್ಕು ನಿರೋಧಕತೆ, ಗಾಳಿ ಪ್ರತಿರೋಧ, ಕಂಪನ ಪ್ರತಿರೋಧ, ಇತ್ಯಾದಿ)
  • Other add-ons are welcomed, please contact us for more (conservative indication antenna power handling allows for increases. Available in power ratings from 1kW to 90kW, supports horizontal, circular, and elliptical polarization, azimuth and elevation modes, pressure or non-pressurized, etc.)
  • Excellent standing wave ratio.
  • Standard Heavy null fill
  • Horizontal, elliptical, or circular polarization options are available.
  • Standard azimuths and custom overlay modes are available.
  • Partial and full radomes for low wind loads (optional)
  • Online installation guide (please contact us if you need on-site guidance)
  • Professionally certified component soldering
  • Safety and performance testing before leaving the factory
  • Feeder cables and other antenna accessories (optional)

 

ಕೊಟೇಶನ್ ಕೇಳಿ

 

Finally, for more details, please leave a message, ನಮ್ಮನ್ನು ಸಂಪರ್ಕಿಸಿ and tell FMUSER what you need exactly, we will get back to you as soon as possible!

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