Pin‐loaded planar wideband end‐fire circularly polarised antenna

Abstract

A single‐layer planar end‐fire circularly polarised microstrip antenna with enhanced bandwidth is proposed by loading with a metal pin. The original antenna is designed with a shorted parallel‐plate cavity that serves as a magnetic dipole, and a double‐sided printed bowtie dipole acts as an electric dipole. Then a metal pin is loaded connecting two metal surfaces and impedance bandwidth is improved obviously. One prototype is fabricated for verification and measured 19% –10 dB impedance bandwidth and 36% 3 dB axial ratio bandwidth are achieved.

Metasurface-loaded printed monopole antenna: tailoring impedance for wideband radiation

“…Alternative methods of broadening the bandwidth are explored in recent years. Bevels [4,5], slots [6,7], shorting pins loading [8][9][10][11], metamaterials loading [12][13][14][15][16][17], fractal structure design [18][19][20] are the most common methods for broadening the bandwidth of antennas. Among all these approaches to extend the bandwidth, the method of metamaterial loading shows great potentials in bandwidth enhancing [21][22][23][24][25][26][27][28][29][30][31].…”