Example Report 7: Minature LPDA 2 - 11 GHz
Description: Typically 2D polar "cut" data is viewed one frequency at a time, in plots showing one or two different "cuts" at that single frequency. An interesting view of this large data set (251 frequencies, 360 angles, or over 90,000 gain measurements) is to visually stack those plots. When stacked, individual polar rings form a 3D surface, with the lower rings representing the lower frequencies. As in other 3D plots, radius and color both indicate gain. Here are some examples assembled from the E-plane and H-plane cuts on the miniature LPDA antenna.
As always, since all data is recorded in spread sheet format, additional plots and post analysis is always possible.
All pictures are "click to enlarge".
| Closeup photo of the antenna under test. |
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| Stacked H-Plane 2D polar plots, over the operating range of 2 - 11 GHz. This top favoring tilted view shows the rear null develop nicely at higher frequencies. |
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| Stacked H-Plane 2D polar plots, over the operating range of 2 - 11 GHz. This rear favoring view shows the rear null more clearly. |
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| Stacked E-Plane 2D polar plots, over the operating range of 2 - 11 GHz. This top favoring tilted view shows the rear null develop nicely at higher frequencies. |
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| Stacked E-Plane 2D polar plots, over the operating range of 2 - 11 GHz. This rear favoring view shows the rear null more clearly. |
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| Stacked E-Plane 2D polar plots, over the operating range of 2 - 11 GHz. This rear favoring view shows the rear null more clearly. |
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Service Summary
Antenna Gain Patterns
EIRP, TRP, Efficiency
RF Design and Debug
RSE and Harmonics
Failure Mitigation
GSM/CDMA Cellular
