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首页> 外文期刊>Antennas and Propagation Magazine, IEEE >Wide-Band High-Frequency Antennas for Military Vehicles: Design and testing low-profile half-loop, inverted-L, and umbrella NVIS antennas.
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Wide-Band High-Frequency Antennas for Military Vehicles: Design and testing low-profile half-loop, inverted-L, and umbrella NVIS antennas.

机译：军用车辆宽带高频天线：设计和测试薄型半环路，倒L和伞状NVIS天线。

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摘要

The design of low-profile, wide-band (WB), high-frequency (HF), vehicular, on-the-move (OTM) antennas is associated with a number of challenges, including their small electrical size, mounting constraints, and the diverse environment in the near field, to name a few. This article considers antennas for near vertical incidence skywave (NVIS) operation from 2 to 15 MHz with a wide tunable bandwidth of at least 24 kHz. The minimum gain at the zenith of -25 dBi is comparable to that of state-of-the-art 3-kHz channel OTM NVIS antennas. The baseline configuration is a two-arm half loop operating in NVIS mode, designed such that it can be easily reconfigured into either an inverted-L or an umbrella-loaded monopole. Each arrangement has its own advantages in terms of radiation patterns, impedance, and practicality. Two arms are used to satisfy the performance requirements and keep the overall profile under 1 m. A full-scale prototype is fabricated and integrated with a specific military vehicle. The stand-alone measurements confirm the expected impedance behavior, whereas the tests with an experimental WB HF radio prove the validity of the design approach. Because of the diverse operation modes, the antenna is flexible and can readily adapt to various communication conditions.
机译：薄型，宽带（WB），高频（HF），车载，移动（OTM）天线的设计面临许多挑战，包括它们的小尺寸，安装限制以及仅举几例，就是近场中多样化的环境。本文考虑了从2到15 MHz的近垂直入射天波（NVIS）操作的天线，其可调带宽至少为24 kHz。在-25 dBi的顶点处的最小增益与最新的3 kHz信道OTM NVIS天线的最小增益相当。基准配置是在NVIS模式下运行的两臂半环，其设计使其可以很容易地重新配置为倒L型或伞状单极。每种布置在辐射方向图，阻抗和实用性方面都有自己的优势。使用两个臂来满足性能要求，并将整体轮廓保持在1 m以下。制造了一个完整的原型并与特定的军用车辆集成。独立的测量确认了预期的阻抗行为，而使用实验性WB HF无线电进行的测试证明了设计方法的有效性。由于操作模式多样，天线具有灵活性，可以轻松适应各种通信条件。

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