Design of Truncated Microstrip Antenna with Array 4x2 for Microwave Radio Communication

Wireless communication systems especially radio microwaves communication need a device that functions as a signal transmitter and receiver where the final device for these processes is an antenna. This paper proposes the design of a circular polarization microstrip antenna for microwave radio communication with range frequency of 10750 - 10950 MHz. Circular polarization with axial ratio <= 3 dB is obtained by using a truncated corner technique, whereas to increase bandwidth an array method with 4x2 elements is used. The type of substrate used is Arlon LX 217 with epsilon(r) of 2.2, thickness (h) of 0.587 mm and loss tangent (tan alpha) 0.0009. From the simulation results of proposed antenna obtained bandwidth impedance with return loss <= -10 dB and VSWR <= 2 is 1449 MHz with a frequency range 10511-11960 MHz. Furthermore, the axial ratio of the proposed antenna is 1.468 dB while gain is 10.56 dB at working frequency of 10850 MHz. From the results obtained it can be concluded that the proposed antenna is suitable for microwave radio communication.