Transparent dual-band monopole antenna using a mu-metal mesh on the rear glass of an automobile for frequency modulation/digital media broadcasting service receiving

摘要

A transparent dual-band monopole (Inverted-F) antenna using a micro-metal mesh film (mu-MMF) designed on the rear glass of an automobile (Hyundai K5) is presented. This design allows the optically transparent antenna to be installed in a wider space, thus overcoming the space limitation typically posed by roof-mounted shark-fin antennas. It can also reasonably solve the problem of low reception sensitivity and radiation interference from antennas operating in other service bands. The antenna is a combination of two simple monopoles operating in the frequency modulation (FM) (88-108 MHz) and the digital media broadcasting (DMB) (174-216 MHz) service bands. Measured reflection coefficients (S-11) of the transparent antenna using mu-MMF are under -6 dB (VSWR 3:1) in both the bands, and the radiation pattern shows directive patterns to the outward direction from the car; the average peak gains in the XY plane are 1.1 dB in the FM service band and 8.8 dB in the DMB service band.