Example 7: Antipodal Vivaldi with Slot Edges

This sample report features a specialized Vivaldi antenna, evaluated with our 3D polar patterns at standard resolution (10 degree steps). The antenna was swept from 1400 MHz to 18 GHz.

Background: It goes by the formal name of an antipodal PCB Vivaldi antenna with exponential slotted edges. Although, it is better known as a Palm Tree antenna! This design is by Iain, the author of the HexAndFlex Blog.

Results: The measured end-fire gain was typically between 4 to 8 dBi. It features positive gain from 1.5 to almost 18 GHz. Accounting for return loss and reasonable pattern directivity, the antenna is useful from about 1650 MHz to 9300 MHz. Realized radiation efficiency and return-loss/VSWR are great across this operating band. Our test report includes graphs of gain vs frequency, as well as our interactive variable frequency polar plots. As always, all data is provided in Excel spreadsheet format, allowing for additional plots and post-analysis. The results spreadsheet can be downloaded HERE.