Broadband CP crossed‐stepped‐dipole antenna incorporating a cross slotted square patch

• DOI: 10.1049/iet-map.2018.5254
• Publication Date: 2018-08-02T02:32:20Z
• Authors: Guirong Feng; Lei Chen; Xingsi Xue; Na Li; Xiaowei Shi
• Keywords: Square (algebra); Patch antenna

A simple broadband circularly polarised (CP) crossed‐dipole antenna is proposed. The composed of two crossed‐strip dipoles with stepped sections, which are connected by vacant‐quarter rings to realise CP radiation, and a parasitic cross‐slotted square patch (CSSP) consisting modified square‐ring cross‐slot, surrounds the crossed dipoles. By controlling width ratio strip dipole can provide proper amplitude between orthogonal modes achieve wide axial (AR) bandwidth. CSSP generate minimum AR points simultaneously: one point from ring‐patch mode, while other generated based on mode combination be equivalent magneto‐electric dipole. An prototype fabricated measured for design verification. experimental results show that proposed its structure has −10 dB impedance bandwidth more than 80% (3.38–7.97 GHz) 3 59.1% (4.17–7.67 GHz). also demonstrates excellent features including high gain, good stability, symmetrical radiation pattern.