Design of uniform SIW leaky wave antenna: With and without supported ground

SIW uniform leaky wave antennas with and without supported ground are designed in this paper. The antenna conducts beam steering from 0° to 178°, operates on multiple frequency bands and has average gain of -6.5dB. On the other hand when added a supported ground to the same design, the antenna operates on a wider frequency band and the beam width becomes narrower with average gain of 7.5 dB and frequency steering from 16 to 143°. Both of the antennas are simulated by the CST microwave studio, fabricated on Roger 5880 and measured using the network analyzer. There are a good agreement between the measured and simulated results.