A simple single-layer reconfigurable leaky-wave antenna (LWA) is presented that has polarization agility and beam-scanning functionality. This LWA system realizes a scanned beam that can be switched between all of its linear polarization (LP) and circular polarization (CP) states using only one dc biasing source. A slot-loaded substrate-integrated waveguide (SIW)-based LWA is first explored to attain CP performance with continuous beam scanning through broadside. This CP LWA realizes a measured CP performance with a 3 dB gain variance within 2.75–3.35 GHz for scan angles ranging from −28.6° to +31.5°. A row of shorted stubs is then incorporated into the CP LWA to obtain similar LP performance. Finally, by introducing p-i-n diodes into this LP LWA configuration to facilitate reconfigurable connections between the main patch and the shorted stubs, the radiated fields can be switched between all of its CP and LP states. The measured results of all three antennas confirm their simulated performance. It is demonstrated that the main beam of the polarization-reconfigurable LWA can be scanned from −31.5° to +17.1° with gain variations between 9.5 and 12.8 dBic in its CP state and from −34.3° to +20° with them between 7.8 and 11.7 dBi in its LP state.

中文翻译：

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具有通过宽边连续波束扫描的极化可重构漏波天线

提出了一种简单的单层可重构漏波天线 (LWA)，它具有极化捷变和波束扫描功能。该 LWA 系统仅使用一个直流偏置源即可实现可在所有线性偏振 (LP) 和圆偏振 (CP) 状态之间切换的扫描光束。首次探索了一种基于槽载基板集成波导 (SIW) 的 LWA，以通过横向连续光束扫描获得 CP 性能。该 CP LWA 在 2.75–3.35 GHz 范围内实现了 3 dB 增益方差的实测 CP 性能，扫描角度范围为 -28.6° 至 +31.5°。然后将一排短路短截线合并到 CP LWA 中以获得类似的 LP 性能。最后，通过在这种 LP LWA 配置中引入 pin 二极管，以促进主贴片和短路短截线之间的可重新配置连接，辐射场可以在其所有 CP 和 LP 状态之间切换。所有三个天线的测量结果证实了它们的模拟性能。结果表明，偏振可重构 LWA 的主光束可以从 -31.5° 扫描到 +17.1°，其 CP 状态的增益变化在 9.5 到 12.8 dBic 之间，从 -34.3° 到 +20°，它们在 7.8 LP 状态下为 11.7 dBi。