Fig. 7
From: Design and development of multiband PIFA antenna for vehicular LTE/5G and V2X communication
Max. realized gain over Freq and for Theta 0°, 60° and 90°. The figure shows the maximum realized gain of the antenna over frequency for three different radiation angles: 0°, 60°, and 90°.This is the simulated result of realized gain which indicates that gain has maximum value as the frequency increases. The red marked graph shows realized gain for Theta 0°.The blue marked graph shows realized gain for Theta 60°.The green marked graph shows realized gain for Theta 90. At 0° radiation angle, the antenna has a maximum realized gain of approximately 7.8 dBi at a frequency of 3 GHz, indicating that the antenna is most directive in the broadside direction. At 60° radiation angle, the antenna has a maximum realized gain of approximately 5 dBi at a frequency of 5.8 GHz. At 90° radiation angle, the antenna has a maximum realized gain of approximately 6 dBi at a frequency of 4.50–5.50 GHz