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<p>An ultra-wideband (UWB) monopole antenna fed by a compact coplanar waveguide (CPW) is proposed for Internet of Things (IoT) applications. The antenna, with an overall size of 32&#xa0;mm × 30&#xa0;mm on a Rogers substrate, operates efficiently across the 3–17&#xa0;GHz band. A strawberry shaped radiating patch combined with a partial ground structure enables wide impedance bandwidth and stable radiation characteristics without the use of multilayer substrates. Extended impedance improvement is also achieved by employing a coplanar waveguide (CPW) feeding mechanism incorporating a castle-shaped profile along with a wider radiation element. The design attains a radiation efficiency above 80%, a gain ranging from 4 dBi to 8 dBi, and a reflection coefficient (|S<sub>11</sub>|) below − 10 dB throughout the entire band via parametric optimization. The analysis of electric field distribution verifies uniform excitation, thereby affirming the radiator’s wideband performance. The planar single-layer design facilitates fabrication and integration with IoT modules, rendering the antenna a cost-efficient and scalable option for wideband, high-reliability IoT communication systems.</p>

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Design of a Rogers Substrate-Based CPW-Fed Ultra-Wideband Monopole Antenna with Enhanced Radiation Stability for IoT Applications

  • 期刊论文

  • 发表日期：

    2026年5月27日

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  • Chavakula Sridevi,
  • Mandru Sunil Prakash,
  • Uppalapati Venkata Ratna Kumari

摘要

An ultra-wideband (UWB) monopole antenna fed by a compact coplanar waveguide (CPW) is proposed for Internet of Things (IoT) applications. The antenna, with an overall size of 32 mm × 30 mm on a Rogers substrate, operates efficiently across the 3–17 GHz band. A strawberry shaped radiating patch combined with a partial ground structure enables wide impedance bandwidth and stable radiation characteristics without the use of multilayer substrates. Extended impedance improvement is also achieved by employing a coplanar waveguide (CPW) feeding mechanism incorporating a castle-shaped profile along with a wider radiation element. The design attains a radiation efficiency above 80%, a gain ranging from 4 dBi to 8 dBi, and a reflection coefficient (|S11|) below − 10 dB throughout the entire band via parametric optimization. The analysis of electric field distribution verifies uniform excitation, thereby affirming the radiator’s wideband performance. The planar single-layer design facilitates fabrication and integration with IoT modules, rendering the antenna a cost-efficient and scalable option for wideband, high-reliability IoT communication systems.