| With the development of aerospace, In order to solve the problem that the antenna is difficult to conform with the fuselage, and achieve the integrated design of the antenna device and Aircraft Skin, gradually the concept of conformal bearing antenna is formed.This paper studies a new-type conformal bearing antenna, we design two new-type embed microstrip antenna array laminated composite structures by the use of CST electromagnetic simulation software. This conformal bearing antenna has a widespread application compared with embed microstrip antenna array honeycomb sandwich structure. Besides, the microstrip patch antenna develops from one element patch antenna into four elements patch linear antenna array. We solve the problem that antenna performance is below standard when the upper skin contacts with antenna by reasonable design.The conformal bearing antenna laminated structures with dielectric-slab of glass epoxy are designed and prepared. Research shows that glass epoxy with high dielectric contant increases the antenna bandwidth more easily, the bandwidth is increased by 480MHz from 350MHz of embed microstrip antenna honeycomb sandwich structure to 830MHz when the gain is unchanged; meanwhile we study the dielectric-slab of PTFE sheet, and we know the PTFE sheet can increase the gain about from 8dB to 11.97dB when the bandwidth is the same, and this result is very good. The two type antennas are fabricated by the use of Protel software and PCB technology, and are tested the antenna gain and patterns in the microwave unreflected chamber. The results of the first antenna have great difference. the second antenna is better than the first, and the gain tested is up to 14.14dB, increases the gain greatly.The conformal bearing antenna not only keeps antenna performance, but alse bears load. This paper presents the experimental and analytical of the three point bending for the laminated structure, and gets the load - displacement curves of structures. The results show the strength of the laminated structure with glass fiber reinforced plastics which has very thin chromium topcoat for dielectric-slab is not descended compared with othe laminated structures, and the embed PTFE dielectic-slab structure is reduced in strength. The chromium topcoat increases the adhesion between the glue and plate, which increases the shearing force, and then improves the bending modulus. Finally we study the bending of the embed microstrip array antenna laminated composite structure. The different models of bending are made, and then to compute the antenna performance of these models .We study the evolution of antenna performance when antenna is bended, and prepare for the further study of conformal bearing antenna. |
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