Broadband 90? Isosceles Triangular Microstrip Antenna

Broadband 90° isosceles triangular microstrip antenna derived from equivalent equilateral triangular microstrip antenna, is proposed. The parametric study for variation in isosceles angle from 50° to 90° is presented. The increasing angle tunes the spacing between TM10 and TM11 modes of the triangular patch to realize broadband response. The simulated and measured bandwidth of more than 600 MHz (> 45%) is obtained. This is more than the bandwidth realized in equilateral triangular microstrip antenna. The proposed 90° isosceles patch yields broadside radiation pattern with gain of more than 6 dBi over entire bandwidth.