Log-Periodic Antenna and Yagi-Uda Antenna are two common antenna types. They have some differences in structure and working principle.
Structural differences: Logarithmic antennas typically consist of a series of parallel conductor elements that vary in length to form a compact structure. Yagi antennas consist of a main driver and a series of reflectors and drivers whose length and spacing are designed for specific frequencies.
Frequency Range: Logarithmic antennas are usually designed as broadband antennas that can operate within a large frequency range and have relatively uniform gain characteristics. Yagi antennas are typically designed as narrowband antennas for applications within a specific frequency range, and their gain characteristics may vary significantly outside the frequency range.
Gain and Directivity: Logarithmic antennas usually have relatively uniform gain characteristics and wide beam width, and have omnidirectional radiation characteristics. Yagi antennas usually have higher gain and narrow beam width, and have strong directivity, which can concentrate energy radiation in a specific direction.
Application areas: Logarithmic antennas are commonly used in applications such as television, wireless communications, and radar. They can cover multiple frequency bands and are suitable for broadcast and communications transmission. Yagi antennas are commonly used in wireless communications and radio receivers in medium and high frequency bands, and are suitable for long-distance communications and remote measurements.
In general, logarithmic antennas are suitable for applications with a wide frequency band that require uniform radiation characteristics, while Yagi antennas are suitable for applications with a narrow frequency band but require higher gain and directivity.
Post time: Oct-06-2023