#TITLE_ALTERNATIVE#

• Main Author: AVIOLANDA (NIM: 13206050) ; pembimbing : Ir. Endon Bharata, MT ; Dr. Achmad Munir, SHENDIARY
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/17217
• Institution: Institut Teknologi Bandung

In WiMAX (Worldwide Interoperability Microwave Access) communication, the antenna with high gain and large bandwidth characteristic is required. In fulfilling the demand, a printed dipole antenna array is designed at one of WiMAX frequency bands in Indonesia, in 3.3 GHz. A printed dipole antenna array is designed in collinear configuration on an Arlon Diclad 527 substrate which thickness and dielectric constant are 1.6mm and 2.5 respectively. A printed dipole antenna, as an element of the array, is a balance type antenna, so a balun circuit to transform from unbalance circuit of coaxial input to a balance circuit of antenna is needed. Marchand balun is chosen because it has wide bandwidth, low loss, and can be easily implemented on planar structures. To improve the antenna gain, a ground plane that acts as a reflector is added in a quarter wavelength spacing from antenna. A printed dipole antenna, as an element of antenna array, is then realized on Arlon Diclad 527 substrate with 44 mm x 28.4 mm x 1.6 mm size. The measurement is carried out to validate the simulation results, such as reflection coefficient, VSWR, gain, and radiation pattern. Based on measurement result, single printed dipole antenna has 598 MHz bandwidth and 5.85 dBi gain at 3.3 GHz frequency. The antenna array contains eight element printed dipole antennas, which are uniformly fed by a corporate feed network. This corporate feed network is designed with 1&#8260;4&#955; transformer matching technique. Spacing between the array elements is 42 mm or 0.6&#955; , which is chosen to avoid grating lobe because of large spacing in antenna array. Based on simulation result, the antenna array bandwidth (VSWR 2:1) is 570 MHz and the gain is 13.78 dBi at 3.3 GHz frequency. <br />