Benefits or advantages of Log Periodic Antenna The wide bandwidth is great advantage of this antenna compare to YAGI and other antenna types. ➨Low to moderate gains can be obtained. ➨It offers uni-directional and bi-directional radiation patterns. It is highly directional antenna.
Which is better Yagi or Lpda?
Because it has many dipole elements of different lengths, an LPDA antenna can transmit and receive across a wide range of frequencies. A Yagi antenna is designed to operate in a very narrow frequency range with higher gain.
Is the operating mechanism of a log periodic antenna similar to a Yagi antenna?
The construction and operation of a log-periodic antenna is similar to that of a Yagi-Uda antenna. The main advantage of this antenna is that it exhibits constant characteristics over a desired frequency range of operation. It has the same radiation resistance and therefore the same SWR.
Which kind of antenna is an alternative to Yagi array and what is the advantage of using it?
Fractal metamaterials can produce parasitic antennas that are highly directional and far smaller in form factor than Yagis, the company claims, and they can be used as drop replacements for Yagis.
Why is log periodic antenna called so?
The log periodic antenna or aerial is in many areas to provide a wideband RF antenna solution with gain and directivity over that offered by a dipole. One design named the log periodic antenna is able to provide directivity and gain while being able to operate over a wide bandwidth.
What is the gain of a log periodic antenna?
In terms of its specification a typical log periodic antenna might provide between 3 and 6 dB gain over dipole for a bandwidth of 2:1 while retaining an VSWR level of better than 1.3:1.
Why we call log periodic antenna?
The log periodic is commonly used as a transmitting antenna in high power shortwave broadcasting stations because its broad bandwidth allows a single antenna to transmit on frequencies in multiple bands. The log-periodic zig-zag design with up to 16 sections has been used.
Why is it called log periodic antenna?
Log periodic antenna is so named because its characteristics, could be gain or impedance, shows a periodic variation with log of the input frequency. The principle of operation may be explained by considering a log periodic dipole array. It contains a large number of elements.
Why log periodic antenna is frequency independent?
Explanation: Log periodic antenna is frequency independent. The geometrical structure of the antenna changes according to the wavelength. It is also called as Frequency Independent antenna. Its electrical performance is dependent on logarithmic of frequency only.
Is a log periodic antenna directional?
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 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.
What is the gain of the log periodic antenna?
