Patch modification and slot arrangement of microstrip antenna for improving the axial ratio

In this research, we produced a new design of microstrip antenna with truncated corner technique modified with slot in the middle patch of microstrip antenna to produce circular polarization for Long Term Evolution application. The value of return loss, VSWR and axial ratio of the antenna can enhanced by adjusting the length of the slot provided in the middle patch of microstrip antenna. Antenna designed using FR4 substrate with value (εr) = 4.3, substrate thickness (h) of 1.6 mm and loss tangent (tan δ) of 0.0265. From the simulation results obtained return loss -45.45 dB, VSWR 1.014 and axial ratio 2.014 dB at a working frequency of 2300 MHz. The gain of the designed antenna is 6.93 dB. Slot method increased the axial ratio of the antenna until 26.17 % and array method increased gain until 26 %.