Abstract
This letter presents a systematic study of multiport wire antennas (MPWA) as a step toward reconfigurable radiation apertures, an essential component in modern wireless systems. We predict the surface current distribution of the multiport structure and derive a closed-form relation for the radiation pattern of the aperture as a function of its input port excitations. Based on this, we present a design procedure for optimal selection of port locations and their respective input excitations with a desired radiation pattern in mind. Finally, we develop a computationally efficient method to derive the impedance matrix of the multiport aperture without the need for full-wave simulation. As an example, we used this method to design a 15-port mm-wave antenna. We demonstrate that for a selected aperture size and port locations, and only by adjusting the phases and amplitudes of excitation, we can reconfigure the MPWA to synthesize a desired beam at any frequency within the 20-40 GHz range. There is good agreement between the results predicted by this method and those from EM-based simulations, enabling an efficient and scalable approach for designing multiport radiators.
Original language | English (US) |
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Pages (from-to) | 2270-2274 |
Number of pages | 5 |
Journal | IEEE Antennas and Wireless Propagation Letters |
Volume | 22 |
Issue number | 9 |
DOIs | |
State | Published - Sep 1 2023 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2002-2011 IEEE.
Keywords
- Mm-wave
- Z-matrix
- multi-port antenna
- radiation pattern synthesis
- wire antenna