A novel power divider network with momentum matching for feeding arrays of arbitrary spoof surface plasmon polaritons antennas

Document Type : Original Article

Authors

1 Electrical Department Imam Khomeini International Universty (IKIU)

2 Electrical Department Engineering Faculty Imam Khomeini International University (IKIU)

3 Iranian Research Organization for Sience and Technology (IROST)

Abstract

Abstract
A novel power divider network for feeding arrays of arbitrary groundless spoof surface plasmon polaritons (SSPP) antennas with coplanar waveguide (CPW) input is proposed. The design approach is generalized for any SSPP antenna with CPW input by presenting a flowchart. The proposed feeding network is simulated and optimized via CST Studio software. We validate our designed network's effectiveness using a fabricated prototype eight-branch SSPP array antenna that shows a measured impedance bandwidth of 0.98 GHz (11.536-12.516 GHz) and a maximum gain increase of 7.48 dB compared with a single-branch SSPP antenna, with only a 1.55 dB deviation from the lossless theoretical increase value of 9.03 dB. The proposed power divider network can feed SSPP antennas with no attached ground, enabling performance optimization of the antenna by placing a detached ground. SSPP-based planar antennas are gaining popularity in aerospace due to their lightweight, low-profile design. They offer high efficiency, wideband operation, and resistance to electromagnetic interference, making them ideal for satellite communications and dynamic aerospace environments. Since single-branch SSPP antennas which use CPW inputs often lack sufficient gain, the power divider network proposed in this paper holds particular importance for combining multiple radiating elements, boosting gain and directivity without compromising compactness

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References

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