This thesis aims at designing reduced size of the antennas elements which when used with an RF transceiver adapts with the radiation pattern and ensures better communication between master and slave mobile computers. In order to obtain a maximum efficiency, the project concentrate only on the antenna elements which is suitable to work in the bandwidth range of 2.45Ghz.the choice of the band is based on the fact that it is an ISM band which does not require permission for performing any experimental tests, another reason is that the antenna can be integrated to work with any standard communication devices that operate in this band such as IEEE802.11b standard and Bluetooth. Another advantage is that the Bluetooth modules and its associated w softwares are available in market by many manufactures at affordable prices so it becomes easy for any final year student to pursue this thesis.
From the last ten years we are being witnessing the rapid development of wireless communication which was possible mainly due to the advancements in the field of digital communication. This led to the transformation of the technology into many fields from military field. Since the digital communication had many advantages like resistance with noise and interference etc and better security with encoding techniques, makes it special unlike its analogue counterpart. These features assisted the rapid growth of the 2nd and 3rd generations of cellular phone systems.
For a traditional antenna to work efficiently its size must be half of the free space wavelength so for 1Ghz the antenna must be 15 cms but apparently for microwaves and millimetre waves utilizing more than or above 1Ghz can offer a reduction in the size of the material radiating. The same frequencies can also offer substantial bandwidth for the information-carrying signal. For example, if it is assumed that a radio transducer operates over a 10% bandwidth, a 100MHz BW for a 1GHz carrier frequency system is theoretically obtainable.
The design and usage of the wireless computers needs a specific frequency band available for it. Everybody knows that the Radio Frequency spectrum is not a free commodity and it’s being governed by specific bodies to avoid its interference by irresponsible users. The other reason is that particular frequency bands can be allocated to specific services. Due to the importance of some offered services, a given frequency band, treated as commodity, may be worth of billions of dollars when auctioned by a government to competing bidders (companies).
Download this final project report on this link: http://goo.gl/aT9l8