1. UNDERSTANDING ANTENNA

The antenna can also be defined as s ebuah or group of conductors that are used to emit or forward wave electromagnetic toward space free or catch a wave elektromegnetik of space free . Energy electricity from a transmitter is converted into a wave of electromagnetic and by an antenna which then these waves are transmitted to free air . At the receiving end of wave electromagnetic is converted into energy electricity by using Anten a .

ANTENNA FUNCTION

In basically a ntenna divided into two , namely as the transmitter and receiver . The function of a ntenna transmitter is to change the signals of electricity into the wave electromagnetic space free ( wave micro ) as a transmitter ( Tx ).  While the function of a ntenna as the receiver (Rx) is changing waves of electromagnetic space free into the signal electricity

KINDS OF ANTENNA

Sorts – kind of antenna that regular use on the network wireless is omnidirectional antenna, antenna yagi , antenna parabole , parabolic grid antenna, panel antenna.

  1. Omnidirectional Antenna ( Omni )

Traits – traits that are owned antenna omnidirectional:

 The pattern of radiation is described as a cake donut (donut)            

  • Has 360 radiation patterns when viewed from the magnetic field            

 Has a beam in all directions making it suitable for use as an access point antenna            

 Have distance traveled were quite narrow because the radiation spreads and is not focused on one direction        

2. Yagi Antenna ( uda-yagi )

Traits – traits that are owned antenna Yagi ( uda-yagi ) :

 It has a shape that is similar to the antenna television            

 Discovered by Shintaro Uda            

 The findings were published through Hidetsuga Yagi’s writing            

 Consists of a dipole ( Driven Element ) which is equipped with a reflector and several directors     

3. Parabolic Antenna and Parabolic Grid

Traits – traits that are owned antenna dish and Grid Parabola :

 Consists of a dipole as a driven element which is mounted in advance of the reflector            

 Has a reflector in the form of a solid dish and a parabolic grid 

  1. Panel Antenna

Traits – traits that are owned antenna panel :

 Consists of several driven elements , which are mounted in front of a flat metal reflector            

 The antenna is covered by plastic or glass fiber            

 Has a size that varies from 15 cm to 76 cm.     

Traits – traits that are owned antenna panel :

 Consists of several driven elements , which are mounted in front of a flat metal reflector            

 The antenna is covered by plastic or glass fiber            

 Has a size that varies from 15 cm to 76 cm.     

5. Helix Antenna

Traits – traits that are owned antenna helix:

Circ Has circular polarization with driven elements      

 Driven element mounted kesebuah reflector of metal      

 Tangible helix as a spring

Polarization
Polarization is the direction of vibration of electrical components (E) electromagnetic waves concerned with the earth. Antenna reception will be more effective when installed according to the polarization of the signal it receives.

CHARACTERISTICS OF ANTENNA

  1. Antenna Radiation Pattern
    The depiction of radiation related to the strength of radio waves emitted by the antenna or the level of signal reception received by the antenna at different angles.
  2. Roughness (Directivity)
    Directivity or Directivity is a comparison between the antenna’s denticity of power at a distance of a certain point relative to an isotropic radiator. What is meant by an Isotropic Radiator is an antenna radiating uniformly in all directions.
  3. Gain
    Gain or often also called Directivity Gain is an Antenna parameter that measures the ability of an antenna in directing its signal radiation or receiving signals from a particular direction.
  4. Polarization
    Polarization or polarization can be interpreted as the direction of propagation of the electric field or the distribution of electric field vectors. Antenna polarization referred to here is the orientation of the electric field from radio waves related to the surface of the earth and the compatibility of the physical structure of the antenna with its orientation.
  5. Bandwidth
    Antenna bandwidth is defined as an antenna frequency range with several characteristics according to predetermined standards. Bandwidth can be considered as a range of frequencies, on the other hand it is used as a center frequency where the characteristics of an antenna can be accepted into a middle frequency value.
  6. Voltage Standing Wave Ratio (VSWR)
    VSWR is the ratio between the maximum standing wave amplitude (| V | max) and the minimum (| V | min).

LEAVE A REPLY

Please enter your comment!
Please enter your name here