Transmitters

Have you wondered where this world would end up without communication? It is very hard to even conceive what will happen to mankind when every mode of communication stops working. The very thought is frightening and the whole world will no doubt be in great chaos. Two way radio Communication helps in sharing or informing the latest happenings and the news around the world. It is used vastly for personal, commercial and security reasons. Hardly anyone leaves home today without his mobile phone. In order to have uninterrupted communication network effective transmitters are used.

What are transmitters and why are they considered so important in the world of two way radio communication? A Transmitter is an electronic device which with the help of the antenna broadcasts electromagnetic signals used for radio, television and telecommunication. To make it simple, a transmitter sends information to the receiver through objects like antennas, towers etc. We generally call our mobile handsets, receivers. The data which is transmitted from another form passes through a network of transmitters before reaching our mobile receiver.

A data from a two way communication network is transmitted from the one place to the satellite and again back to the place it is sent. In this case the satellites work as transmitters by receiving data and converting them and sending them back to the receivers. This transmitted data cannot be said as safe as anyone with little knowledge on hacking this data can easily steal them. This generally happens with highly secretive emergency communication by the armed, air or naval forces.

The security communication systems used highly powerful transmitters whose frequency cannot be reachable. Moreover many governments have introduced strict laws against this danger and the risk of highly secured data being stolen. Industrial sector uses transmitters for its process control. But these transmitters are used to convert the sensors measurement into signals. These measurements from sensors are sent through wires to distant receivers. It uses digital protocol to measure variables in a range.

Alexander alternator or mechanical alternator was used in the olden days for radio, engineering and frequency. Later, vacuum tubes were used as transmitters in the 1020’s. After a lot of advancement and evolution transmitters today are capable of handling huge volumes of data transfers and are encrypted and secured. These are fed from high voltage power supply to ensure security. The possible risks to transmitters are lightning and hence the transmitters must be well protected.

Without antennas the transmitters can be damaged so all steps must be taken to ensure the safety of the transmitters. Protection must also be provided from high voltage and correct voltage of current. During times of lightning the transmitters must be switched off immediately. At the same time the place or building on which the transmitters are set up are also very important. Thus for an efficient working of a high power transmitter proper safety and security measures must be taken. Transmitters are very imperative for all types of two way radio communication systems.

Transceivers

The world has become a global village because of the advancement in the two way radio communication systems. Anyone living in the remotest part of the world can share his knowledge or information within seconds with the rest of the world. The electronic media is growing in leaps and bounds and we cannot even imagine what a life our ancestors have been leading, without electricity, mobiles or the internet. All these gadgets and gizmos have become a part of our lives so much so that our kids feel it is a very important part of their communications. Any form of communication medium needs a receiver and a transmitter. But a transceiver can do the job of both the transmitter and the receiver.

What is actually the job of the transceiver? How can it be useful with the two way radio communication systems? A transceiver combines into a common circuitry both the receiver and the transmitter, and this term came into process from the 1920’s. When the transceivers don’t have a common circuitry it is called transmitter-receiver. But technically speaking every transceiver must have part of both the receiver and transmitter. There are other similar devices like transverters, repeaters and transponders. One best example of a transceiver is the mobile phone wherein the whole unit contains the transceiver, whereas the normal telephone has wired receiver and transmitter in its handset.

A modem and cordless telephones are also best examples of the transceivers. Cable or optical fiber systems also use these devices. In a radio the transceivers role is imperative. The receiver goes into silent mode while transmitting. The switch of the radio connects both the receiver and transmitter to the antenna which in turn stops the transmitter from damaging the receiver. In this so called half duplex mode receiving signals is not possible while transmitting as both the functions are done in the same frequency.

In the full duplex mode the transceivers can transmit and receive signals at the same time, as they operate on totally two different frequencies. In this case both the signals do not intercept one another. This full duplex mode is what is used in cellular and cordless phones. Almost all satellite dependant communication systems use the full duplex mode of transceivers. In this case the transmitted signal to the satellite is otherwise known as uplink and the received signal from the satellite is called the downlink. Many different types of transceivers are being invented tested and used from time to time.

The cost of the transceivers depends upon its usage and capability to handle the amount of work transmitted and received. Whatever the price the role of transceivers in two way radio communication systems is imperative. Today most of the people cannot live without their mobiles and they find it hard to use fixed landline telephones. The telephone operators introduce cordless, wireless phones for customer friendly feature and this is best made use of by the customers. In today’s fast world transceivers enabled devices are user friendly, powerful and performance driven. Newer technologies will enhance the user experience more and more in future.

Secure Communications

Today we use quiet a lot of two way radio communication mediums to share personal and business details. Are you sure this data or information shared is secure? Who can guarantee the security of the systems we use in our day to day lives? How can we secure our communication systems from possible hackers or virtual thieves? The answers to these questions depends upon the type of communication system we use, its purpose in our lives and the role it plays to help us do the work we intent to do using them.

Communication is imperative among humans and so it is among other living beings too. So man developed a language through which he started sharing his thoughts. Initially it was commuted through hand signals or actions. Then words, sentences and finally a proper fully fledged language were formed for communication purpose. This differed from region to region and from country to country. Still a limitation was existent as all people couldn't understand other languages and only the people nearby were able to commute. This started off the fire of communication which later evolved and is finally in a state today where even the remotest person living in Antarctica can call Japan in few seconds.

Coming back to secured two way radio communication, the more man depended on communication the need for its security also became imperative. When two people shared something important they expect their messages to be private and safe. So they started using security devices to safeguard the communication systems from being hacked by third parties. Normal everyday communication has some security and we do trust that no one is tapping our calls. When communication is done for more serious matters then special care should be taken to increase the security mode of the device that we use. Mostly commercial and military operations need secured two way radio communication systems. In recent years we hear so much about top secret messages from government or military sources being intercepted by terrorists. The same happens the other way too wherein the military or police intercept the enemy connections.

During the Second World War a highly effective secured communication was used between Winston Churchill and US President Roosevelt. This secured communication was called Green Hornet. Initially they were talking through radio phones which were easily overheard by the Nazis. It was then that the Green Hornet was introduced. Whoever tried to intercept would just hear white voices. The clear original message was heard only by the two users. Different types of security are, coded, encryption, steganography etc. other security threats include Trojan horses, spy ware and viruses. These can be easily taken care of by antivirus software, registry checkers and firewalls. These are generally termed as computer security. A well protected two way radio communication is stress free and the large institution and research centers can relax due to their safe communication network. Today virus attacks are common even in mobile phones. They are transmitted through Bluetooth file transfer facilities. Secure communication is no doubt imperative for all communication needs.

Mobile Tactical Communications

Mobile tactical communications are communication facilities which allow people to get in touch when the usual civic communication channels are down. The ideal mobile tactical communications system will be jam-resistant, adaptive, mobile and secure. It would have multiple accesses, wideband mobile receiver, laser communication technology and ability to propagate the channel.

Military communications need to be integrated as there are many manned, unmanned devices working in tandem with the infantry and other units of the army – in the highly isolated areas like a battle field or a disaster affected area. Proper conduction of an operation requires effective communication. Making mobile tactical communications inevitable – this requires an interoperable system which works with tactical radios, local area networks and wide area networks. These systems are stand alone which can function with the help of the technology the mobile phones work on using the GSM, GPRS and satellite technologies or the humble two way radio which used the electromagnetic waves to convey messages. The Morse code though obsolete should not be forgotten.

Mobile tactical communications came in handy during the various terrorist attacks like the 9/11 of the world trade centre when the commercial cellular lines were hit in the epicentre and the hurricane Katrina too. Mobile tactile communications can help connect to the outside world and save lives – when someone’s injured and requires hospitalization, as for help when completely surrounded by enemy, call for food and medicines for the people marooned in floods and similar situations.

Mobile tactile communications are not only the requirement of the army but also the rangers of the forests, the rescue workers of the areas affected by the natural disasters, police and other government officials, social workers, and the common man. When there are billions of dollars being spent on advancement and development of technology and other facilities the development of the mobile tactical communications will change the way we all communicate – it uses the radio the voice over the internet protocol and other intelligent and commonly available technologies.

When war-like conditions arise at a terrorist attack or a natural disaster all communication links get jammed then the mobile tactical communications are the answer to the need of the moment as these technologies will help keep in touch with loved ones. The cables, the communication hubs, the usual modes of communication could be affected or as the lines are jammed more communication options may be required or a platform to streamline the rescue or other operations may be required to instruct people and public in general at such times the high and multi-frequency mobile tactical communications would be very effective. The hurt and the injured may require medical attention – call for land and air ambulances, fire brigades, medical emergency vans and law enforcement agencies would be made easy and timely in the hour of need.

Mobile tactical communications are the need of the hour and should be posted at focal point throughout the cities to help communicate at the times when other communication devices have suffered damage or overload.

Military Radio Aerials

Military radio aerials are transducers designed to transmit or receive electromagnetic waves which are converted into electrical currents and vice versa. These Military radio aerials are used in point-to-point radio communication, radars, wireless LAN and even in space exploration. These can be used in air, underwater, underground and even outer space. Satellites are used to send and receive data to facilitate this mode of communication.

Military radio aerials are wire of structure arranged such that it generates and radiates the electromagnetic waves when an alternating current is applied. Their size too differs according to the type of system being used; they are even mounted on bionic bugs to spy on enemies. Most military radio systems and military radio aerials give undeterred comm-links.

Usually amateur radios are used in military comms – these are mostly used for emergency needs. Amateur radio is not dependent on the local or terrestrial facilities as they sometimes fail. The military radio aerials improvise a signal which ensures a regular dependable performance and all times from any place on the earth as long as the frequency is known. This makes them ideal for use during disaster relief and other remote operations.

These can be used at the time of active war & terrorist attacks; they ensure safety from commercial and industrial espionage and safe communication to research institutions, etc. Military radio aerials are very powerful and can meet the diverse needs of the military forces and other institutions.

Military radio aerials are secure to use because as soon as war breaks out the enemies first target is to cripple the communication system as a part of the strategy to isolate the enemy. Aerials are stand-alone, light and portable. The difference between an antenna and an aerial is that an antenna is a large metallic structure, known as a transceiver as opposed to an aerial which is a wire which can be held in any direction to facilitate communication – in fact it can be adjusted to transmit and receive radio frequencies just like it elder larger cousin. There are different kinds of aerials – a single vertical aerial that transmits signals at 360 degrees or in the form of a sphere. There are mobile aerials on cars, truck, cell phones and radio aerials which transmit in different patterns due to which the different radio channels at different frequencies are possible.

Military radio aerials have different frequency receptions and capacities depending upon the type of communication system installed. The best communication system is when the signals are sent and received in an uninterrupted manner even in places like underground bunkers, through thick rocks and caves or other remote locations like the tops of mountains and deep cervices in the hills, on the high and deep seas in the submarines.

Generally huge reception antennas are used for the base stations but the military radio aerials are ideal for the operations on temporary or mobile bases as they are light weight, easy to carry and setup, thus very crucial for military ops.