Abstract
This paper presents the antenna factor (AF) of sleeve dipole antennas (SDA) with coaxial-cable balun for electromagnetic compatibility (EMC) applications. The AF characteristics are considered by varying parameters such as the length of the central dipole and the size and spacing of the sleeve elements. The coupled integral equations for the unknown current distributions on each element are derived and solved by applying Galerkin's method of moments. A SDA with a 180 cm central dipole has similar characteristics as a conventional biconical antenna but with a physical volume 86% lower than that of the Schwarzbeck BBA9106 biconical antenna. Calculated antenna factors of the SDA are compared with measured results. A sleeve dipole antenna for electromagnetic interference (EMI) measurements with an appropriate antenna factor could be realized.
Highlights
The use of a tuned dipole antenna in the electromagnetic compatibility (EMC) field is described in CISPR Publication 16-1 and ANSI C63.5 [1], [2]
The broadband EMC antennas typically used in EMC measurements are the biconical antenna (30 ∼ 300 MHz) and log-periodic dipole array antenna (300 ∼ 1000 MHz and beyond)
We considered the frequency characteristics of the sleeve dipole antennas (SDA) antenna factor (AF) in terms of central dipole length, size of sleeve elements, and sleeve spacing
Summary
The use of a tuned dipole antenna in the electromagnetic compatibility (EMC) field is described in CISPR Publication 16-1 and ANSI C63.5 [1], [2]. The associate editor coordinating the review of this manuscript and approving it for publication was Haiwen Liu. This paper presents the antenna factor (AF) characteristics of a sleeve dipole antenna (SDA), with coaxial-cable balun (CC balun), for use in EMI measurements in the frequency range of 30 MHz to 300 MHz. To calculate the AF, the coupled integral equations for the unknown current distributions on each element are derived and solved by applying Galerkin’s method of moments (MoM). When a central dipole lengths of 160 cm, 180 cm, and 200 cm were chosen for use in the frequency range of 30 to 300 MHz, the SDA has similar characteristics as the conventional biconical antenna, which has a volume 88%, 86%, and 85% lower than that of the commercial Schwarzbeck BBA9106 biconical antenna, respectively. If the current distributions are obtained, the AF characteristics of the SDA can be calculated from Eq (1)
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