IEICE Communications Express
Online ISSN : 2187-0136
ISSN-L : 2187-0136
Numerical estimation for TEM horn antennas with transmission line taper shapes
Katsushige Harima
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2017 Volume 6 Issue 9 Pages 560-565


The design of transverse electromagnetic (TEM) horn antennas has to consider impedance matching between the feeding point and the aperture. To achieve good impedance matching, several typical tapered transmission lines are applied to the taper shape of TEM horns in this study. The numerical estimation of the antenna characteristic of each TEM horn is performed using the finite integration method. An exponential taper is most applicable to the antenna shape among those transmission line tapers. An exponentially tapered TEM horn, however, has problems in maintaining a single main lobe in the radiation pattern. We propose a shortened exponentially tapered TEM horn in which has a simple structure that improves the radiation directivity, and the estimation results show its effectiveness as a broadband antenna.

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© 2017 The Institute of Electronics, Information and Communication Engineers
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