In [8, 9], a successful attempt to improve the F/B ratio of printed Yagi array antenna for WLAN and millimeter-wave applications was proposed.
Then, by subtracting the pattern of dipole antenna from that of the original Yagi array one could reduce the backside lobe in the radiation pattern of the original Yagi antenna.
In order to compute the gain of the Yagi array, we assume that the currents are sinusoidal.
Figure 2 presents calculated and measured radiation patterns (E-plane) of a seven-element equally spaced Yagi array.
Consider the case where one radiating dipole is added to the Yagi array, as shown in Figure 1(c).
Planar microstrip Yagi array antenna," IEEE Antennas and Propagation Society Int.
Tentzeris, "A new high-gain microstrip Yagi array antenna with a high front-to-back (F/B) ratio for WLAN and millimeter-wave applications," IEEE Trans.