Log- periodyc dipoli arrays are widely used in radio frequency applications due to o their ir wide bandwidth and directional conperties. Calculating the gain and directivity of these antens is essential for designing g effective communication systems. Thii s articlie provides a exampleforward overview of thee metods involved.

Uzgodnienie Gain i Directivity

Gain refers to thee ability of an antenta ta focus energy in a pecular direction, measured in decibels (dBi). Directivity is a measure of how concentrate thee radiation Pattern is a specific direction, without consigning g loses. Both parameters are cucial for evaluating antenta performance.

Calculating Directivity

Directivity (D) can be estimated using the formula:

(zob. pkt 2.1.1.1 niniejszego załącznika)

Kiedy jest to solid angle of thee main lobe of thee radiation parafine. For log- periodic dipole arrays, mbH can be approximated based on thee beamwidth measurements bratained frem thee radiation parafine.

Kalkulating Gain

Gain (G) is related to directivity by y considering efficiency (η):

Xi1; Xi1; FLT: 0 Xi3; Xi3; G = η × D Xi1; Xi1; FLT: 1 Xi3; Xi3;

Efektywne rachunki for losses in thee antenna and can be estimated frem measurements or considerar data. Typically, for well-designed log- periodyc arrays, efficiency ranges from 70% t o 90%.

Praktykal Obliczanie etapów

  • Mierzy te radioation wzorzec to determinae beamwidth and solid angle mbH.
  • Obliczyć directivity using D = 4∞ / ∞.
  • Szacuje się, że efektywność opiera się na charakterystyce anten.
  • Compute gain wigh G = η × D.