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A novel full-angle scanning leaky-wave antenna is proposed, featuring a dual-sided mixed microstrip-spoof surface plasmon polaritons structure. Benefiting from the existence of multiple feasible transmission modes, the proposed structure supports a large modulation amplitude. Through theoretical derivation of the pure −1st harmonic radiation condition, strongly coupled radiation patches are arranged on the top of the transmission line, with rotatable radiation stubs placed on the bottom. The open stopband phenomenon is thoroughly mitigated by tuning the rotational orientation of the underlying stubs. The empirical measurements demonstrate excellent consistency with the numerical simulations. This design achieves continuous full-angle wave beam scanning across the 8.5 GHz to 14 GHz band, with an average radiation efficiency of 92.0% and an average gain of 13.4 dBi. Featuring a compact footprint, elevated gain, and wideband emission, this configuration offers significant viability for advanced tracking and radar platforms.
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Ye et al. (2026) studied this question.
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