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GEP-Pagoda2

SUMMARY

“Pagoda 2” is based on Maarten Baert optimized circular polarized antenna, Produced by GEPRC customize a 5.8 G antenna, is the scope of its bandwidth of 500 MHZ (5.55 to 6.05 GHz). Structure consists of three layers of 1 oz copper foil embedded PCB, only 8 grams of weight, use special heat shrink packaging, solid, durable, and beautiful. PCB materials used 1.0 mm FR – 4, 1 oz copper foil (strictly according to Maarten Baer design requirements, learn more, please click: http://www.maartenbaert.be/quadcopters/antennas/pagoda-antenna/)

Pagoda 2 has natural advantages, axis ratio is below 1.3, standing wave ratio of 1.2.Can be used for transmitting antenna and receiving antenna (transmit and receive all use pagoda2 antenna is better).

PRODUCT BASIC INFORMATION

Specifications

  1. Model:GEP-Pagoda2
  2. Center frequency: 5.8 GHz
  3. Bandwidth: 500 MHz (5.55 – 6.05 GHz)
  4. Matching: S11 < -20 dB, VSWR < 1.22 (at center frequency) Axial ratio: < 1.3
  5. Radiation efficiency: 95%

LHCP

RHCP

Radiation pattern

Image: pagoda2-rad-3d-l80-wp-30db-small.png 3D radiation pattern. Look at the 2D version if you actually want to see the numbers.
Image: pagoda2-model-small.png Simulation model. Image: pagoda2-rad-vert-l80-wp-small.png Best case, vertical cross-section taken at various angles. Image: pagoda2-rad-vert-l80-nowp-small.png Worst case, vertical cross-section taken at various angles.
For comparison, here's a simulation of the traditional cloverleaf antenna using the same simulation software and setup:
Image: cloverleaf-model-small.png Simulation model. Image: cloverleaf-rad-vert-l80-wp-small.png Best case, vertical cross-section taken at various angles. Image: cloverleaf-rad-vert-l80-nowp-small.png Worst case, vertical cross-section taken at various angles.
The 'best case' and 'worst case' correspond to different assumptions about what happens to signals that travel along the outside of the coax. In the 'best case' simulation, these are completely absorbed at the other end of the coax. In the 'worst case' simulation, they are completely reflected back towards the antenna. The latter case usually results in standing waves on the outside of the coax, which causes the coax itself to radiate and interfere with the radiation pattern of the antenna. This is why the radiation pattern isn't smooth anymore. The reality will be somewhere between these two extremes.

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