How to Choose the Right Shipboard Antenna? - PowerPoint PPT Presentation

About This Presentation
Title:

How to Choose the Right Shipboard Antenna?

Description:

Marine antennas are manufactured in various forms and shapes these days. They are widely used in merchant ships, naval ships, and leisure crafts all over the globe. A Shipboard Antenna is a type of marine antenna that is installed on naval platforms and large vessels. – PowerPoint PPT presentation

Number of Views:2
Slides: 5
Provided by: antennaexperts
Tags:

less

Transcript and Presenter's Notes

Title: How to Choose the Right Shipboard Antenna?


1
How to Choose the Right Shipboard Antenna? Marine
antennas are manufactured in various forms and
shapes these days. They are widely used in
merchant ships, naval ships, and leisure crafts
all over the globe. A Shipboard Antenna is a type
of marine antenna that is installed on naval
platforms and large vessels. You need to consider
many factors while choosing a good shipboard
antenna. This blog lists all the things to
consider when you are buying a marine
antenna. What is Shipboard Antenna? Now, let us
discuss the meaning of the term Shipboard
antenna. It is a type of Marine Antenna used in
ships, large vessels, yachts, and naval
platforms. This marine antenna generally works on
different frequency bands such as 117-137 MHz,
118-400 MHz, and 225-400 MHz. A shipboard antenna
can work in any type of weather. It contains a
wide vertical beam width for clear communication.
The antenna is highly used for various
applications such as sea, ground, and
ground-to-air applications. Moreover, it is
useful in Oceanic applications where ice loading
and vibration are major problems. Types of
Shipboard Antenna-VHF UHF Shipboard Antenna We
will further discuss the kinds of shipboard
antennas. Shipboard antennas are mainly of 2
types such as 1. VHF antenna VHF Shipboard
Antenna is a premium quality dipole antenna
developed mainly for the marine VHF radio
telephone service. It has sturdy construction and
includes a nice finish. Apart from that, it is
also easy to install a VHF antenna in any ship or
large vessel. A VHF antenna can be used in all
types of vessels. This antenna can be easily
mounted on the bulkhead with the help of 4 holes
in the bracket. You can attach it to a tube by
using M6 U-bolts. Furthermore, the
VHF antennas are easy to handle and ship from one
place to another.
2
  • 2. UHF antenna
  • The second type of shipboard antenna is UHF
    Shipboard Antenna. It is a type of antenna used
    in different applications such as two-way radio,
    commercial communications, and public safety. UHF
    antennas generally work between the range of 300
    MHz and 3 GHz. They are widely used in
    non-line-of-sight (NLOS) applications where
    wireless paths are disturbed by obstructions,
    multi-path, and phasing.
  • How to Choose the Right Shipboard Antenna?
  • Do you want to buy a Ship Antenna? Then it is
    necessary to follow certain things to get the
    best antenna for marine vessels and ships. Read
    below to know the things while choosing the right
    shipboard antenna
  • Frequency of antenna
  • Frequency range and bandwidth are important terms
    to consider in an antenna. If you want to buy the
    best shipboard antenna, it is necessary to
    understand these terms. The bandwidth of an
    antenna is the frequency range on which the
    antenna works effectively.
  • The antenna must satisfy certain parameters to
    work such as radiation pattern, gain, VSWR, and
    so on. VSWR is the most common parameter for
    bandwidth considerations. This bandwidth is known
    as impedance bandwidth.
  • Directional and Omni-directional antenna
  • The second factor to consider while choosing the
    shipboard antenna is whether it is
    Omnidirectional or directional. The
    omnidirectional antenna sends and receives energy
    in all horizontal directions. Contrary to that,
    the directional antennas send and receive energy
    in one direction.
  • The omnidirectional antenna is widely used in
    applications that need good coverage. On the
    other hand, the directional antenna is used in
    applications where there is no need for
    all-around coverage. This antenna focuses energy
    in

one particular direction.
3
  • Gain of the antenna
  • The next thing to consider is the antennas gain.
    It is related to the antennas directivity. Now,
    let us know the term directivity. It is a number
    that indicates the antennas ability to focus on
    energy in a specific direction and not in various
    directions.
  • The antennas gain is reduced by the loss
    introduced by the antenna. A parameter that
    measures the loss of the antenna is known as
    radiation efficiency and it has a value between 0
    and 1.
  • VSWR specification
  • Voltage Standing wave ratio is an important
    factor to consider while choosing a shipboard
    antenna. This ratio is an indication of the
    amount of mismatch between the antenna and the
    feed line connecting to the antenna. VSWR has
    values in ranges from 1 to infinity.
  • VSWR value under 2 is perfect for many antenna
    applications. The common VSWR specification
    adopted is 21 VSWR. It means that the range of
    frequencies in which the VSWR is lower than 2 is
    the bandwidth of the operation.
  • Antenna placement
  • The last factor to look for while choosing a
    Naval Shipboard Antenna is the placement of an
    antenna. To get the most optimal placement for an
    antenna, you must consider various factors like
    height, line-of-sight, distance between antennas,
    and the curvature of the earth.
  • You must mount the antenna at the highest point
    due to the restrictions of the line-of-sight
    range with VHF signals. The antennas orientation
    must match such as vertical to vertical and
    horizontal to horizontal.
  • Advantages of using a Shipboard antenna
  • After discussing the important factors to
    consider while choosing the shipboard antenna, we
    will now discuss the various benefits of a
    shipboard antenna in the

below section
4
  • A shipboard antenna is very simple to handle and
    ship anywhere in the world because of lightweight
    body.
  • This antenna has solid construction and does not
    get damaged in any kind of weather of ocean.
  • This antenna makes communication easier and
    better than before.
  • It can be used in a wide range of boats, yachts,
    large vessels and ships.
  • The components used in making of a shipboard
    antenna are durable and do not rust easily even
    after many years.
  • This antenna is easy to maintain for a long time.
  • Conclusion
  • This is all about a Shipboard antenna that you
    must know. It is a kind of High Gain Marine
    Antenna that can be installed without any special
    equipment or tool.
  • These antennas are perfect to simplify
    communication on large vessels, ships and
    different kinds of boats.
Write a Comment
User Comments (0)
About PowerShow.com