Log periodic fractal koch antenna for UHF band applications

In this paper, the design of Log Periodic Fractal Koch Antennas (LPFKA) is proposed for Ultra High Frequency (UHF) band applications. The procedure to design the LPFKA with three different numbers of iterations in order to reduce the antenna size is discussed. The Computer Simulation Technology (CST) software has been used to analyze the performances of the designed antennas such as return loss, radiation patterns, current distribution and gain. The antennas have been fabricated using FR4 laminate board with wet etching technique. Using fractal Koch technique, the size of the antenna can be reduced up to 27% when the series iteration is applied to the antennas without degrading the overall performances. Both simulated and measured results are compared, analyzed and presented in this paper.

[1]  Constantine A. Balanis,et al.  Antenna Theory: Analysis and Design , 1982 .

[2]  R. Bansal,et al.  Antenna theory; analysis and design , 1984, Proceedings of the IEEE.

[3]  Brian C. Wadell,et al.  Transmission Line Design Handbook , 1991 .

[4]  Jordi Romeu,et al.  Perturbation of the Sierpinski antenna to allocate operating bands , 1996 .

[5]  Jordi Romeu,et al.  Fractal multiband antenna based on the Sierpinski gasket , 1996 .

[6]  N. Cohen,et al.  Fractal antenna applications in wireless telecommunications , 1997, Professional Program Proceedings. Electronic Industries Forum of New England.

[7]  Jordi Romeu Robert,et al.  On the behavior of the Sierpinski multiband fractal antenna , 1998 .

[8]  Jordi Romeu,et al.  Small but long Koch fractal monopole , 1998 .

[9]  R. Garg,et al.  Microstrip Antenna Design Handbook , 2000 .

[10]  K. A. Jose,et al.  Hilbert curve fractal antenna: A small resonant antenna for VHF/UHF applications , 2001 .

[11]  K. J. Vinoy,et al.  Fractal Shaped Antenna Elements for Wide-and Multi-band Wireless Applications , 2002 .

[12]  Jong-Gwan Yook,et al.  Fractal‐shape small size microstrip patch antenna , 2002 .

[13]  Yahya Rahmat-Samii,et al.  Fractal antennas: a novel antenna miniaturization technique, and applications , 2002 .

[14]  D. Werner,et al.  An overview of fractal antenna engineering research , 2003 .

[15]  L. Zheng,et al.  Analysis of the patch antenna based on the Minkowski fractal , 2004, ICMMT 4th International Conference on, Proceedings Microwave and Millimeter Wave Technology, 2004..

[16]  A. Eldek.  DESIGN OF DOUBLE DIPOLE ANTENNA WITH ENHANCED USABLE BANDWIDTH FOR WIDEBAND PHASED ARRAY APPLICATIONS , 2006 .

[17]  Ali El-Hajj,et al.  A reconfigurable U-Koch microstrip antenna for wireless applications , 2008 .

[18]  B. Mirzapour,et al.  Size reduction and bandwidth enhancement of snowflake fractal antenna , 2008 .

[19]  A.A.H. Azremi,et al.  A development of Fractal PIFA (planar inverted F antenna) with bandwidth enhancement for mobile phone applications , 2009, 2009 Loughborough Antennas & Propagation Conference.

[20]  Hend Abd El-Azem Malhat,et al.  Fractal Antenna for Passive UHF RFID Applications , 2009 .

[21]  Atefeh Kordzadeh,et al.  A NEW REDUCED SIZE MICROSTRIP PATCH ANTENNA WITH FRACTAL SHAPED DEFECTS , 2009 .