Dumbbell and Double elliptical printed slot antennas for wideband applications

In this paper, a broadband dumbbell shape slot antenna in the frequency range of 5.21-8.46 GHz and double elliptical shape slot in the frequency range of 4.49-8.7 GHz are designed. Dumbbell slot provides 47.5% bandwidth (BW) for |S
₁₁
| ≤ -10 dB and maximum gain of 3.2 dBi at 6.56 GHz and double elliptical slot provides 63.8% BW for |S
₁₁
| ≤ -10 dB with maximum gain of 6.8 dBi at 5.1 GHz. Dumbbell Slot has dimensions of 0.52λ
₀
×1.17λ
₀
and double elliptical has dimensions of 0.38λ
₀
×0.88λ
₀
at 5.8 GHz. The designed antennas are fabricated and simulated results are validated with measured results.