There are a number of wireless communication systems and broadcasting services which must be integrated into vehicles. Through the innovative integration of antenna elements, amplifiers and ground plane, the reception quality and manufacturability of vehicles is expected to be significantly improved. The most important outstanding problem that is structurally effective materials cannot be used without reducing antenna efficiency. The present study aims to suggest electrically and structurally effective antenna structures which are termed composite-antenna-structures (CAS), and study mechanical and electrical behavior characteristics of CAS after compression test. The CAS is composed of two composite laminates (GFRP, CFRP), nomex honeycomb, and antenna element. And that is the dual-mode annular ring antenna and the microstrip patch antenna for the global positioning system (GPS), satellite digital multimedia broadcasting (DMB) and direct broadcast satellite (DBS). Also, when it is designed, the CAS considered composite materials and adhesive film because of the resonant frequency shift and reduced gain. The GPS antenna patch is designed at the resonant frequency of 1.575GHz, and the peak gain is 6.75dBi. The resonant frequency of DMB is 2.645 GHz, and the gain is 5.6dBi. The resonant frequency of DBS is 12.2 GHz, and the gain is 16.98dBi. The CAS was subjected to compression by using a MTS 810 test facility. When compression load is applied to the CAS, the maximum load was about 12kN and buckling was occurred in GFRP facesheet. The antenna performance of the return loss and radiation pattern was excellent after compression test.
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