Investigatins on Broadband Planar Dipole Antennas

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Investigatins on Broadband Planar Dipole Antennas

Show simple item record Supriyo,Dey Dr.Nair, K G 2013-11-20T08:00:19Z 2013-11-20T08:00:19Z 1993-12-28
dc.description Department of Electronics, Cochin University of Science and Technology en_US
dc.description.abstract This thesis Entitled Investigations on Broadband planar Dipole Antennas. An antenna is a device ordinarily used for both transmitting and receiving electromagnetic energy. It is an integral part of the radio communication system and accounts for a good deal of progress that has been made in this field during the last few decades.The effect of flaring the dipole arms is studied in Section 4.1. It is observed that the flaring modifies the impedance characteristics of the dipole. In particular, the change in the reactive part of the impedance with frequency is controlled considerably. This improves the 2:1 VSWR bandwidth of the antenna. The effect of various other design parameters on the impedance bandwidth of the antenna are also studied. The important conclusion drawn is that, there is considerable improvement in the impedance bandwidth of the dipole when ground arm dimensions are larger than the main arm dimensions. Theoretical analysis of various cavity backed antennas are given in Chapter 6. The experimental values agree well with the computation. Also the theory gives a clear inside view and explains the reasons for bandwidth enhancement due to flaring and end-loading of the dipole arms. The percentage bandwidth is determined by calculating the Q of the antenna. Since the approach is for the analysis of microstrip antenna on thick grounded substrate, this method cannot be used to predict the impedance bandwidth of the antennas without cavity backup. Also, the structures analysed are simplified versions of the optimised ones. Specially, the arms overlapping is neglected in the analysis. Also, the antennas with symmetrical arms can only be analysed with this theory. en_US
dc.description.sponsorship Cochin University of Science and Technology en_US
dc.language.iso en en_US
dc.publisher Cochin University of Science and Technology en_US
dc.subject Waveguide antennas en_US
dc.subject Triplate antennas en_US
dc.subject Microchip antennas en_US
dc.subject Antenna feeding en_US
dc.subject Printed dipole en_US
dc.title Investigatins on Broadband Planar Dipole Antennas en_US
dc.type Thesis en_US

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