Accession Number:

AD1027855

Title:

Quasi-static Design of Electrically Small Ultra-Wideband Antennas

Descriptive Note:

Technical Report

Corporate Author:

Space and Naval Warfare Systems Center Pacific San Diego United States

Personal Author(s):

Report Date:

2017-02-01

Pagination or Media Count:

39.0

Abstract:

The ultra wideband UWB antenna shape determines both the lowest operating frequency and Q-factor ratio. For electrically small antennas, the quasi-static antenna design algorithm can be used to design very low Q-factor ratio antennas with high bandwidth 4, 5. The Q-factor ratio is the coefficient of the largest term in Chus limit, the right side of Equation 1 7. Lowering the Q-factor ratio reduces the Q-factor for the electrically small part of the frequency range. The UWB antenna shape in the quasi-static antenna design algorithm is a cone with an attached bulb. The lowest operational frequency is reduced without increasing the voltage standing wave ratio VSWR at higher frequencies. This is a physics-based algorithmic approach that avoids the typical cut-and-try method.

Descriptors:

Subject Categories:

  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE