3G Antenna
Every single mobile phone in the world has an antenna, also the 3G phones need one. Some may be visible and some may not but a cellular phone would not perform its primary function, which is to make voice calls, without it. It is an integral part of the unit and along with the phone battery, these two components are like its heart and soul. The antennas main function is to search for an active network and lets the mobile phone connect to it. It is often times called bidirectional because it works as a receiver and also as a transmitter. Working in an analogue or in a GSM wireless cellular network, it searches for the available radio frequency where it can tune into and access it for the phone to perform its function. With current 3G technology where cellular transmitters are much more powerful and have wider ranges, the antenna instantly connects the phone to the network after it has logged on to it through the Subscriber Identity Module or SIM card. In some instances, an external antenna is needed to absorb weak frequencies and increase it in order for the phone to pick up the signal. Every phone has a signal meter in its interface so you will know that your antenna is working or not.
In the case of 3G technology, the phone or an external antenna is used to connect to the networks different services. The base cellular network primarily handles digital voice calls and now with HSDPA handling data transfer and wireless internet, a much more powerful antenna must be provided. In order to boost signal, you can use a desktop or auto roof antenna (if you plan to use your phone inside the car) to provide a stronger signal as long as you are within its coverage. Some antennas may require you to plug the phone directly to it and some also have independent transmitters wherein it sends out the amplified signal within a certain coverage area. HSDPA pc cards on the other hand are already equipped with a bidirectional antenna so that the laptop or the PDA can explore different angles of transmission. And since the user is always on the go, its easier for them to manually adjust the small antennas to achieve better signals. A lot of innovations have been made to the pc card and it has been transformed from a pcmcia card to a usb device that works well in both desktop and portable pcs and at the end of this device is an antenna. This allows it to function not only as a signal receiver but also as a data router as well for other 3G devices that wishes to connect to the high speed internet access.
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