Pagoda-2 Omni Antenna
The Pagoda antenna is an omnidirectional circularly polarized antenna design that Marteen created. His main design goals were:
Good omnidirectional radiation pattern.
Good axial ratio.
Easy to manufacture within fine tolerances at low cost, even for a hobbyist.
Center frequency: 5.8 GHz
Bandwidth: 500 MHz (5.55 – 6.05 GHz)
Matching: S11 < -20 dB, VSWR < 1.22 (at center frequency)
Axial ratio: < 1.3
Radiation efficiency: 95%