What is the working principle of log-periodic dipole antenna array?
The most common form of log-periodic antenna is the log-periodic dipole array or LPDA, The LPDA consists of a number of half-wave dipole driven elements of gradually increasing length, each consisting of a pair of metal rods.
What are the types of the log-periodic dipole antenna?
There are several type of log-periodic antennas such as the planar, trapezoidal, zig-zag, V- type, slot and the dipole. The mostly used one is log-periodic dipole array, in short, LPDA. The construction and operation of a log-periodic antenna is similar to that of a Yagi-Uda antenna.
How does log-periodic antenna operate?
A log-periodic antenna is an antenna that can operate on a wide frequency band and has the ability to provide directivity and gain. It has radiation and impedance characteristics that are repeated as a logarithmic function of excitation frequency. These antennas are fractal antenna (self-similar antenna) arrays.
What is the frequency range of log-periodic antenna?
around 30 MHz to 3GHz
The frequency range, in which the log-periodic antennas operate is around 30 MHz to 3GHz which belong to the VHF and UHF bands.
Is log-periodic antenna directional?
A log periodic antenna is a directional antenna developed for use over a wide band of frequencies, built with an array of dipole elements. Log periodic antennas balance directivity, gain and a wide bandwidth, amplifying the strength of a signal.
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What is log periodic dipole array (LPDA)?
The Log Periodic Dipole Array, popularly known as the LPDA antenna, belongs to a broader family of Log-Periodic antennas. Other than the LPDA, various types of Log-Periodic antenna array structures are available. Some of them being the Log-Periodic Tooth, slot, PCB micro stripline, etc.
What is a log-periodic antenna array?
The Log Periodic Dipole Array, popularly known as the LPDA antenna, belongs to a broader family of Log-Periodic antennas. Other than the LPDA, various types of Log-Periodic antenna array structures are available.
What is the abbreviation for log periodic antenna?
t. e. A log-periodic antenna ( LP ), also known as a log-periodic array or log-periodic aerial, is a multi-element, directional antenna designed to operate over a wide band of frequencies. It was invented by John Dunlavy in 1952.
What is the radiation mechanism of the log periodic dipole array?
Another interpretation of the radiation mechanism of the log periodic dipole array is that if the Log Periodic Tooth Antenna has the arms reduced to wires (dipoles), and it is folded back on itself, then the LP tooth would reduce to the log periodic dipole antenna array.