ABSTRACT
Cars have many antennas embedded at different places on the body to achieve services of infotainment and entertainment. These antennas can be meander line antennas for radio reception or shark fin type antennas for GPS services. The antenna also can be a wireless sensor for monitoring health parameters of passengers. Multiple services can be achieved inside vehicles at different frequencies of operation, i.e. AM/FM, GPS, GSM, TPMS (tire pressure monitoring), toll collection, SDAR(satellite radio), SRR(short range radar) and LRR (long range radar), Wi-Fi, Wi-Max, WLAN, etc. To fulfill all these requirements, multiple antennas are used in vehicles. Multi mode DRAs can be the best candidates to reduce the number of antennas used in vehicles. In this chapter, multi mode DRA is designed, simulated and fabricated. Experimental and simulated results for frequencies has been obtained. This work can be directly used a as case study for an application to fulfill vehicular communication requirements. Gain of DRA is more than 4dB and resonance is obtained at 3.6, 5.1, and 8.7 GHz as multiband antenna. S11 on these frequencies is below −10 dB, and VSWR is below 2 dB. Impedance is matched.
The connectivity to cars can be made with mobile communication networks. These can have entertainment services through the Internet, satellite radio and AM/FM radio with DAB and digital TV. These cars can also communicate through infrastructure nearby on the road and other vehicles as well as self.
