Design and Analysis of Printed Yagi-Uda Antenna and Two-Element Array for WLAN Applications

Figure 5

Equivalent radiation current vector diagram of the antenna.

(a)  1.8 GHz, 𝐼_𝑑=0.18∠−167.6^∘, 𝐼_𝑠=1.00∠−11.9^∘, 𝐼_𝑠𝑟=1.00∠−57.3^∘, 𝐼_𝑑𝑟=0.18∠−213^∘

(b) 3.4 GHz 𝐼_𝑑=1.00∠−64.8^∘,𝐼_𝑠=0.22∠101.6^∘,  𝐼_𝑠𝑟=0.22∠15.9^∘, 𝐼_𝑑𝑟=1.00∠−150.5^∘