Abstract
A circular polarised printed quadrifilar helix antenna with enhanced bandwidth is proposed in this study. The helix antenna offers a very compact size and comprises of four arms with varying width, four open stubs, a feeding network and a metal ground plane. The different widths of the helix arms are employed to improve the impedance bandwidth while their varying pitches generate a cardioid radiation pattern. The antenna exhibits a voltage standing wave ratio ≤ 2 in the frequency range of 1.43-1.63 GHz offering impedance bandwidth of 12%. Good radiation characteristics with high gain, a wide 3 dB axial ratio beamwidth of 180° along with small size makes this antenna an excellent candidate for satellite communications and navigation systems.
| Original language | English |
|---|---|
| Pages (from-to) | 732-736 |
| Journal | IET Microwaves, Antennas and Propagation |
| Volume | 11 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 24 Apr 2017 |
Keywords
- UHF antennas
- antenna radiation patterns
- microstrip antenna arrays
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