MICROSTRIP ANTENNA THEORY BLUETOOTH
They designed a 2.4 GHz Bw antenna for Bluetooth application.
MICROSTRIP ANTENNA THEORY PATCH
13 had studied the effect of the variation of the patch width and length, and height and εr, of the substrate on the band-width. Hussain A.Hammas 12 had study the effect of dielectric layer substrate on the MSPA performance lick Half power beam width, antenna efficiency, radiation efficiency, antenna directivity and radiation pattern. 11 had enhanced the gain of the MSA, using multi-layer multi-dielectric layer which is separated from patch by air as an another dielectric. During using the multi-layer and a dielectric substrates, study of the effects of the dielectric thickness on the performance of the antenna. To get a multi-band PA, a multi-layer separated by a dielectric substrates had been used. They had increased the bandwidth by 4.7% and got the a directivity a bone 6dB.due to the need for the multi services a multi band antennas has been invented. 10 had designed a single layer single feed miniaturized MPNA. 9 has written an algorithm for optimization of the MSA gain with and without dielectric substrate, using genetic algorithms. There were many other research, works devoted toward the improvement of the gain. 8had designed a high performance ultra compact chip antenna. 7 had design multilayer MSA to get 3.1-10.6 GHz BW for mobile applications, they increased the bandwidth by 50%. 6 had designed two broad band microstrip antenna using planer line feeding, they had successfully implemented the antennas and got an enhanced band width by 25%. This will perform on the frequency 0.97 GHz, 1.35 GHz and 3.54 GHz. 5 had designed a triple band microstrip patch antenna for cellular and Wi-Fi application. 4 had designed and investigation of rectangular Microstrip antenna withtri-band applications covering Bluetooth (IEEE: 802.15), WiMAX (IEEE: 802.16) and WLAN (IEEE:802.11a, 802.11b/g/n) bands of modern wireless broadband communication, The desiredtri-band operation had been obtained by proper loading for a rectangular patch antenna using slots and truncations alongside of patch width. In spite of the many advantages of the microstrip antennas, they have many disadvantages such as: narrow band-width, low gain, and relatively long size, One of the main drawbacks of such an antenna is the is the narrow bandwidth, there were many researches work which dealing with such a problem, S.B.Tajane et al. They have been widely used for the civilian and military applications, such as mobile systems, and global positioning systems(GPS), satellites …ect. Since then the Microstrip antenna, become to be the common type of antennas due to many its advantages which they have like: light weight, low cost, low profile, planer configuration, superior port ability, easy for fabrication and easy integration with microwave monolithic integrate circuits 2, 3. It has been in use for about twenty years before development of the printed circuit board(PCB) technology in1970s. Microstrip antennas was introduced for the first time at 1950s 1.
MICROSTRIP ANTENNA THEORY FREE
Antenna is a device used to transform an RF signal, traveling on a conductor, into an electromagnetic wave in free space.
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