volume | PIER Journals

Abstract

Conventionally designed Vivaldi antennas are predominantly fabricated using PCB technology, which limits their long-term applicability in high-power systems. This paper proposes a three-dimensional all-metal slant 45°-polarized Vivaldi antenna suitable for high-power applications. The design incorporates a resonant cavity and optimized slot-line parameters to broaden the operational bandwidth. A 16 × 16 array configuration was developed, with parasitic elements integrated to suppress edge effects. The optimal prototype was fabricated and experimentally validated. Simulation and measurement results demonstrate that the proposed all-metal Vivaldi antenna achieves a voltage standing wave ratio (VSWR) below 2.5 across a frequency bandwidth of 6-18 GHz, along with a maximum beam scanning angle of 48°. This paper demonstrates a practical solution for balancing wideband performance (6-18 GHz) with high-power handling capabilities in phased array applications.

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Dr. Xuebo Xu

Professor Qiulin Huang

Dr. Shunfeng Cao

Dr. Lina Yang

Dr. Guidong Li