Radiation Characteristics of Log Periodic Cantor Koch Dipole Antennas

A New Design of Log-Periodic Dipole Array (LPDA) Antenna

This paper presents a new approach for design of the log-periodic dipole array antenna (LPDA) based on using of different design parameters in the LPDA elements to control the antenna behavior. In the proposed procedure, the design parameters can control the value of forward gain over the operating frequency range, and also adjust the gain flatness. Furthermore, this design procedure can decrea...

Log-Periodic Loop Antennas

The Log-Periodic Loop Antenna with Ground Reflector (LPLA-GR) is investigated as a new type of antenna, which provides wide bandwidth, broad beamwidth, and high gain. This antenna has smaller transverse dimensions (by a factor of 2/π) than a log-periodic dipole antenna with comparable radiation characteristics. Several geometries with different parameters are analyzed numerically using ESP code...

The Design of W - Periodic Dipole Antennas

A mathemat ica l ana lys i s of the logar i thmica l ly per iodic d ipole class of frequency independent antennas, which takes into account the mutual coupling between dipole elements, is descr ibed. A h igh speed d ig i t a l computer (ILLIAC) is used t o c a l c u l a t e t h e i n p u t impedance gain, and bandwidth, a s w e l l a s t h e i n p u t c u r r e n t and vol tage of the several...

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...

Numerical Simulations of Radiation and Scattering Characteristics of Dipole and LOOP Antennas