This article presents a spherical antenna with a slit opening on the RA na Bok, rao came from aluminum material and are easy to install, works uses the signal input via the jacks that adhere to RA na Bok rao. Into the sphere of the antenna with circular antenna design, the wavelength of the frequency 2.45 GHz and then open another Groove Groove has been added to accommodate up to 5.5 GHz frequency, which is the result of estimates-s11 | |-25 dB and 20 dB, and magnification of the antenna is approximately 3.14.DBi and the 2.45 GHz frequency 2.89 dBi and 5.5 GHz respectively and then add a second Groove turned to achieve stability in the use of two frequencies, which were the result of estimates-s11 | |-31 dB, and dB and 31 of antenna that can be made about 3.07 dBi and 3.61 dBi.The 2.45 GHz frequency and neighborhood 5.5 GHz respectively, both of which are located in the Centre of the frequencies used for spherical antenna. A picture of the wave propagation antenna cone beam wave two. The antenna test until successful experiments with resulting from the calculation and selection of the best parameter values from the results of the simulation in a computer program. The experiment of antenna, this suggests that increasing signs one of the four parts of the wavelength can be used for multiple usage frequency.
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