Phase 2 Prototype Development of a GNSS Antenna Using a Meandered Spiral and High Impedance Surface

使用曲折螺旋和高阻抗表面的 GNSS 天线原型开发的第 2 阶段

• 批准号: 971438
• 金额: $ 12.44万
• 依托单位: ARRALIS TECHNOLOGIES LIMITED
• 依托单位国家: 英国
• 项目类别: Small Business Research Initiative
• 财政年份: 2015
• 资助国家: 英国
• 起止时间: 2015 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=971438
• 关键词: Phase; Prototype; Development; GNSS; Antenna

The Arralis design is a low space, weight and power, wearable (e.g. in a MTP helmet cover for an MK6 helmet) or mountable, spiral antenna which uses a High Impedance Surface (HIS) to reduce the thickness (to < 8 mm). By using a meandered spiral type antenna on a HIS, the surface area is kept within 96 mm x 86 mm, and by incorporating a ground plane, the mounting, or 'contact' interactions are removed, meaning that the antenna can be positioned easily on equipment or clothing. The work from Phase 1 shows that the single connection component is well matched to 50 ohms from GPS L5 to GPS L1 frequency bands using a stripline Marchand Balun, and operates using Right-Hand Circularly Polarised (RHCP) waves with an in-band axial ratio < 3 dB. By using a multi-resonant HIS to introduce multiple in-band, in-phase waves from the antenna reflector, the antenna gain and radiation efficiency are increased over a wider bandwidth than conventional antennas and with the added advantage that the thickness and weight are kept to a minimum. This highly repeatable design will be manufactured using existing PCB manufacturing processes to ensure high yields on a technology that is resilient for battlefield conditions, and to keep the costs to a minimum. Furthermore, flexible or woven materials will be implemented to render the device suitable for on-body applications. Simulation results performed in Phase 1 show good performance with the antenna having passive gain in all bands at the larger antenna size. Simulations also show that the antenna can operate, with low dc consumption using active gain, at a lower size and profile.

Arralis 设计是一种空间小、重量轻、功耗低、可穿戴（例如在 MK6 头盔的 MTP 头盔罩中）或可安装的螺旋天线，它使用高阻抗表面 (HIS) 来减少厚度（至 < 8 毫米）。通过在 HIS 上使用曲折螺旋型天线，表面积保持在 96 毫米 x 86 毫米以内，并且通过合并接地平面，消除了安装或“接触”相互作用，这意味着天线可以轻松放置在设备或衣服上。第一阶段的工作表明，单个连接组件使用带状线 Marchand Balun 与从 GPS L5 到 GPS L1 频段的 50 欧姆匹配良好，并使用带内轴比 < 3 dB 的右旋圆偏振 (RHCP) 波进行操作。通过使用多谐振 HIS 从天线反射器引入多个带内同相波，天线增益和辐射效率在比传统天线更宽的带宽上得到提高，并且具有将厚度和重量保持在最低限度的额外优势。这种高度可重复的设计将使用现有的 PCB 制造工艺进行制造，以确保能够适应战场条件的技术的高产量，并将成本降至最低。此外，将采用柔性或编织材料以使该设备适合身体应用。第一阶段执行的仿真结果表明，天线尺寸较大时，所有频段均具有无源增益，具有良好的性能。仿真还表明，该天线可以使用有源增益以较低的直流消耗、较小的尺寸和外形运行。