Performance Evaluation of a Two-Arm Four-Turn Archimedean Spiral Antenna

Discover a high-performance two-arm four-turn Archimedean spiral antenna designed for broadband applications. This study demonstrates bidirectional radiation, wide frequency coverage (0.747–29.858 GHz), and promising performance for mobile communication, sensing, and direction-finding systems through advanced simulation and antenna design.

Adenodi R. A. and Kolebaje O. T.

7/21/20261 min read

ABSTRACT

In this study, a two-arm, four-turn copper Archimedean Spiral Antenna (ASA) was designed to work in the frequency range of 0.747 to 29.858 GHz. The antenna has an inner and outer radius of 1.5989 mm and 63.956 mm, respectively, and a thickness of 0.03556 mm. The goal is to create a source that can provide a nearly omnidirectional, hemispherical 3D radiation pattern on both antenna sides in the elevation planes that is appropriate for mobile and related applications. The simulation yields a broadband, bidirectional radiator with a dumbbell radiation pattern that has a peak gain of 5.48 dB at the two opposite boresights, which decreases to -5.75 dB in directions parallel to the antenna elevation planes. Approximately 7.53% of the boresight gain is available in these parallel elevation planes. Future work will consider an array of ASAs to create a source that radiates a near omnidirectional hemispherical 3D radiation pattern on both antenna sides in the elevation planes.

Keywords: Omnidirectional Radiation, Dumbbell Radiation, Self-complementary, Frequency-independent

HOW TO CITE

Adenodi, R. A., & Kolebaje, O. T. (2026). Performance evaluation of a two-arm four-turn Archimedean spiral antenna. Nexus Inventio: Journal of Science, Innovation and Education, 1(1), 19–22.

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