Bi-directional circular horn antenna with circular probe tuning for dual band applications

This paper is presented a designed on the bi-directional circular horn antenna structure with probe tuning. The circular stubs and horizontal i-shaped tuning lines were added. The probe with the size of λ/4 was used to increase the frequency for the prototype antenna in order to support the dual application frequencies of IEEE 802.11b/g 2.45 GHz (2.4-2.48 GHz) standards and IEEE 802.16e 3.5 GHz (3.4-3.69 GHz). For the circular horn was use to increasing the gain. From the results of measurement, it was found that the antenna responded to the resonance frequency in 2 notch. In the first notch, the low frequency was equal to 2.43 GHz, while the high frequency (second notch) was equal to 3.42 GHz. The radiation pattern in the bi-directional with a gain of 8.34 dBi and 10.08 dBi, respectively.