What is Unbound or Unguided media?

Media
Media

UNBOUNDED / UN GUIDED MEDIA

Unbounded / Unguided media or wireless media doesn't use any physical connectors between the two devices communicating. Usually the transmission is send through the atmosphere but sometime it can be just across the rule. Wireless media is used when a physical obstruction or distance blocks are used with normal cable media. The three types of wireless media are:

  • RADIO WAVES
  • MICRO WAVES
  • INFRARED WAVES

1. RADIO WAVES:-

It has frequency between 10 K Hz to 1 G Hz. Radio waves has the following types.

  • Short waves
  • VHF (Very High Frequency)
  • UHF (Ultra High Frequency)

SHORT WAVES:-

There are different types of antennas used for radio waves. Radio waves transmission can be divided into following categories.

  • LOW POWER, SINGLE FREQUENCY.
  • HIGH POWER, SINGLE FREQUENCY
  1. LOW POWER , SINGLE FREQUENCY:-

As the name shows this system transmits from one frequency and has low power out. The normal operating ranges on these devices are 20 to 25 meter.

CHARACTERISTICS LOW POWER , SINGLE FREQUENCY:-

  • Low cost
  • Simple installation with pre-configured
  • 1 M bps to 10 M bps capacity
  • High attenuation
  • Low immunity to EMI

2. HIGH POWER, SINGLE FREQUENCY:-

This is similar to low power single frequency. These devices can communicate over greater distances.

CHARACTERISTICS HIGH POWER, SINGLE FREQUENCY:-

  • Moderate cost
  • Easier to install than low power single frequency
  • 1 Mbps to 10 Mbps of capacity
  • Low attenuation for long distances
  • Low immunity to EMI


MICRO WAVES

Micro waves travels at high frequency than radio waves and provide through put as a wireless network media. Micro wave transmission requires the sender to be inside of the receiver.

Following are the types of Micro waves.

  1. · Terrestrial Micro waves
  2. · Satellite Micro waves

1. Terrestrial Micro waves:-

Terrestrial Micro waves are used are used to transmit wireless signals across a few miles. Terrestrial system requires that direct parabolic antennas can be pointed to each other. These systems operate in a low Giga Hertz range.

CHARACTERISTICS of Terrestrial Micro waves:-

  • Moderate to high cost.
  • Moderately difficult installation
  • 1 M bps to 10 M bps capacity
  • Variable attenuation
  • Low immunity to EMI

Satellite Micro waves

The main problem with aero wave communication is the curvature of the earth, mountains & other structure often block the line of side. Due to this reason, many repeats are required for long distance which increases the cost of data transmission between the two points. This problem is recommended by using satellites.

Satellite micro wave transmission is used to transmit signals throughout the world. These system use satellites in orbit about 50,000 Km above the earth. Satellite dishes are used to send the signals to the satellite where it is again send back down to the receiver satellite. These transmissions also use directional parabolic antenna’ with in line of side.

In satellite communication micro wave signals at 6 GHz is transmitted from a transmitter on the earth through the satellite position in space. By the time signal reaches the satellites becomes weaker due to 50,000 Km distance. The satellite amplifies week signals and transmits it back to the earth at the frequency less than 6 GHz.

Characteristics Satellite Micro waves:

  • High cost
  • Extremely difficult and hare installation.
  • Variable attenuation.
  • Low immunity to EMI
  • High security needed because a signal send to satellite is broadcasts through all receivers with in satellite.

Infrared

Infrared frequencies are just below visible light. These high frequencies allow high sped data transmission. This technology is similar to the use of a remote control for a TV. Infrared transmission can be affected by objects obstructing sender or receiver. These transmissions fall into two categories.

  1. Point to point
  2. Broadcast

(i) Point to Point: - Point to point infrared transmission signal directly between two systems. Many lap top system use point to pint transmission. These systems require direct alignment between many devices.

Characteristics of Point to point:-

  • Wide range of cost
  • Moderately easy installation.
  • 100 k bps to 16 Mb of capacity.
  • Variable attenuation.
  • High immunity to EMI

(i) Broadcast: - These infrared transmission use sprayed signal, one broad cast in all directions instead of direct beam. This help to reduce the problems of proper alignment and abstraction. It also allows multiple receiver of signal

Characteristics of Broad Cast:-

  • In expensive.
  • Single installation.
  • 1M bps capacity.
  • Variable attenuation.

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Comments 62 comments

Cheeky Girl profile image

Cheeky Girl 6 years ago from UK and Nerujenia

I love technical hubs, there aren't enough of them! Great info here! Nicely done!


Rashmi Gandre 6 years ago

Very nice!!!!!!!!!!


Akshita 6 years ago

Thanks, it helps me in ma assignment..


CKAY 6 years ago

thank you for your information it has helped us a lot


VYOM 6 years ago

THANKS FOR THIS INFO IT HELPED ME A lot


hk 5 years ago

very nice


ken Grifey 5 years ago

good info

thanks a lot


khan 5 years ago

informative


mskan verma 5 years ago

thanks for this .it helped in my sessional but there are many mistakes


shen 5 years ago

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prayshi 5 years ago

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mogire kennedy 5 years ago

infact very interesting


Anonymous 5 years ago

I've rated it as FUNNY cos of the wrong grammar and spellings like "through out", "through put".

Also it should be one word!! -- Microwaves and Broadcast !!!

Please fix the grammar and spelling cos it might lead to confusion of some students..!


pawan 5 years ago

wonderfulll


Mohammed Nomaan 5 years ago

good information...


abdul wakeel 5 years ago

dear thanks a lot its help me a lot.nice work its simple and informative.God bless u


monu bansal 5 years ago

thks a lot.. it hlps me in cmpltng ma assngmnt..


rashmi 5 years ago

very nice!!!


WARDA 4 years ago

GOOD EXPLAINATION


hunny sudeep uniyal 4 years ago

awesm information.thanks to giving us.


paul 4 years ago

i like it,am not illiterate now


sandy 4 years ago

very useful information


zenzo 4 years ago

good info and GOD bless!!!!!!!!!


Mariagoretti onuoha 4 years ago

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shona 4 years ago

meine ise pdra nhi hai but i m damn sure its good for knowledge.thanks


maleeha honey 4 years ago

good information thank u it helps in my assignment


diya 4 years ago

it iz realy helpful.thanks


arien 4 years ago

thanks for this kindness.


M_Shah 4 years ago

it's very good info for the paper point view and general knowledge.


kashaaf mirza 4 years ago

helpful material.thnx


Jack(777) 4 years ago

Good Information............


yolanda 4 years ago

Thanks!!!


VATSAL DANGAYACH: 4 years ago

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aviee 4 years ago

very easy definitions...........


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wow!


Tk 4 years ago

Apart frm the grammatical errors,i must say it is one helpul information. Thanx 4 it


MAJID.GHUMAN 4 years ago

V NICE!


serviceman x 4 years ago

interestind add more


albreezy 4 years ago

add more


Ladi A. 4 years ago

Aside the little errors in spellings, the info provided is just ok(simple, concise, self explanatory ).


yash varshney 4 years ago

please also give information about short distance wireless media


yash varshney 4 years ago

please also give information about short distance wireless media


damaris mokono 4 years ago

The information is good and well detailed


Raj 4 years ago

Nice answer


tanush 4 years ago

helpful page


toure moussa 4 years ago

this topic is really helpful for me to solve my problem with guided and unguided media transmission.


chiranjeev 4 years ago

jai bhdra kali


MATTHEW 4 years ago

NICE WORK


Andrew Chow 4 years ago

Thank a lot~


awias 4 years ago

good


pallavee 3 years ago

thanks..for this info..it help my ppt


sobia 3 years ago

well described


DnG 3 years ago

Nice info. given...


dip 3 years ago

it is very easy to understand....thanks


sheetal 3 years ago

thanx


Rimshah shah 3 years ago

thanx

very nice info


ramash 3 years ago

very nice


golu 3 years ago

nice discription :-)


SAMEER SINGH MALIK 3 years ago

very nice.


maham 3 years ago

best ever i seen on net


sheharyar 2 years ago

thanks ....very nice it helps me,,,,,,,,


joker 2 months ago

hahaha

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