The Log Periodic Antenna (LPA) was proposed in 1957 and is another type of non-frequency-variable antenna.
It is based on the following similar concept: when the antenna is transformed according to a certain proportional factor τ and still equal to its original structure, the antenna has the same performance when the factor is f and τf. There are many forms of log periodic antennas, among which the Log Dipole Antenna (LDPA) proposed in 1960 has extremely wide bandwidth characteristics and a relatively simple structure, so it has been widely used in shortwave, ultra-shortwave and microwave bands.
The log periodic antenna simply repeats the radiation pattern and impedance characteristics periodically. However, for an antenna with such a structure, if τ is not much less than 1, the change of its characteristics within one cycle is very small, so it is basically independent of frequency.
There are many types of log periodic antennas, including log periodic dipole antennas and monopole antennas, log periodic resonant V-shaped antennas, log periodic spiral antennas, etc., among which the most common is the log periodic dipole antenna.
As an ultra-wideband antenna, the bandwidth coverage is very wide, up to 10:1, and is often used for signal amplification, indoor distribution and elevator signal coverage. In addition, the logarithmic periodic antenna can also be used as a feed source for microwave reflector antennas. Since the effective area moves with the operating frequency, the deviation between the effective area and the focus in the entire operating frequency band must be within the allowable tolerance range during installation.
RF MISO’s Model RM-DLPA022-7 is dual-Polarized log periodic antenna that operates from 0.2 to 2 GHz, The antenna offers 7dBi typical gain. The antenna VSWR is 2 Typ. The antenna RF ports are N-Female connector. The antenna can be widely used in EMI detection, orientation, reconnaissance, antenna gain and pattern measurement and other application fields.
RM-DLPA022-7
RF MISO’s Model RM-LPA0033-6 is log periodic antenna that operates from 0.03 to 3 GHz, The antenna offers 6dBi typical gain. The antenna VSWR is less than 2:1. The antenna RF ports are N-Female connector. The antenna can be widely used in EMI detection, orientation, reconnaissance, antenna gain and pattern measurement and other application fields.
RM-LPA0033-6
RF MISO’s Model RM-LPA054-7 is log periodic antenna that operates from 0.5 to 4 GHz, The antenna offers 7dBi typical gain. The antenna VSWR is 1.5 Typ. The antenna RF ports are N-Female connector. The antenna can be widely used in EMI detection, orientation, reconnaissance, antenna gain and pattern measurement and other application fields.
RM-LPA054-7
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Post time: Dec-27-2024
