Design and analysis of tri-band antenna for aerospace application.

A tri-band microstrip patch antenna for aerospace communication application is presented in this paper. The antenna design is based on conventional rectangular shape with two different radiuses via hole and two rectangular slots. The patch rectangular slot dimensions are 20*4.5 mm² and the ground slot dimensions are 22*5.5 mm². The proposed antenna is designed to operate at L-band and S-band aerospace communication applications including mobile satellite services and satellite communication. The antenna operates at 1.805 GHz, 2.325 GHz and 3.42 GHz with -31.6 dB, -21.5 dB and -35 dB return losses respectively. The measured bandwidths of the proposed antenna are 34 MHz, 20 MHz and 100 MHz respectively. The antenna gains in 1.2 dB, 1.4 dB and 1.5 dB. The total dimension of the antenna is 44*41 mm² uses epoxy FR-4 substrate material with 1.6 mm height and 4.3 dielectric constants. The width and length of the patch are 24 mm and 21 mm respectively. The design strategies of the antenna initiated with a conventional microstrip rectangular shape and then analysis the rectangular slot etched to the patch by varying the length and width of the slot. Different dimensions of the rectangular slot that etched to the ground with geometrical analysis is achieved. The next step by applied single via hole and examine the effect of varying the radius on the results. Final step is applied two metallic via holes with different radius (1mm and 0.4 mm) to estimate the antenna performance results. [ABSTRACT FROM AUTHOR]