Development of 1 . 8 M Diameter Dish Reflector using Fiberglass Materials at Ku

This paper describes the design, simulation and development of parabolic reflector using fiber glass. The antenna is 1.8m in diameter, for operation at Ku band (10.95 – 12GHz). An f/d ratio of 0.43 was chosen and other parameters were computed. The S parameters for the antenna were obtained using Design-Expert 6.0.8 Software Version and Advance Design System (ADS). The properties of the antenna such as bandwidth, beam width, gain, directivity, return loss and VSWR were obtained. offers high efficiency and high gain. The fiberglass has good surface accuracy with a light weight of 20 kg.


INTRODUCTION
An antenna is a metallic conductor that is cut into size and shape which radiates and receives electromagnetic waves effectively. The major function of an antenna is to couple radio waves in space to an electrical current used by a or transmitter. In reception, the antenna intercepts some of the power of electromagnetic waves in order to produce a tiny voltage that the radio receiver can amplify. Antennas are of different types based on their frequency of operation, application and characteristics [1].Currently, parabolic reflector is used to receive the ku-band signals. The dish provides the best compromise of high gain, which is about 37dB at 12.5GHz for 0.6m diameter, 38. 0.75m and 40.3dB for 0.9m [2].A parabolic dish antenna has a reflector which is a section of a parabolic reflector. Parabolic dish reflector antenna @ IJTSRD | Available Online @ www.ijtsrd.com | Volume -2 | Issue -3 | Mar-Apr 2018 ). An f/d ratio of 0.43 was chosen and other parameters were computed. The S parameters for the antenna were obtained using Expert 6.0.8 Software Version and Advance s of the antenna width, gain, directivity, return loss and VSWR were obtained. The antenna offers high efficiency and high gain. The fiberglass has good surface accuracy with a light weight of 20

fiberglass, parabolic
An antenna is a metallic conductor that is cut into size and shape which radiates and receives effectively. The major function of an antenna is to couple radio waves in free radio receiver or transmitter. In reception, the antenna intercepts some of the power of electromagnetic waves in order to produce a tiny voltage that the radio receiver can ypes based on operation, application and characteristics [1].Currently, parabolic reflector is band signals. The dish provides the best compromise of high gain, which is about 37dB at 12.5GHz for 0.6m diameter, 38.5dB for 0.75m and 40.3dB for 0.9m [2].A parabolic dish antenna has a reflector which is a section of a parabolic reflector. Parabolic dish reflector antenna contains characteristics of high directivity, extremely low side lobes, pencil beam radiation gain [3].As a result, they are widely used in the fields of point to point and satellite communication at microwave regions.
A dish antenna has a reflector, which is a section of a normal parabolic reflector. If the section does not include at the center of the reflector, then none of the radiated beam is received by Low Noise Block (LNB) the in feed antenna and support structure. For small dishes, feed blockage in an axial feed dish causes a significant loss in efficiency. In this pa fiberglass material to for the parabolic reflector instead of metal is considered.

DESIGN
The value of f/d employed is 0.43 for efficient performance. The higher the ratio of f/d the shallower the dish, with higher directivity and gain [4] f/d = focal length to diameter ratio

Development of 1.8 M Diameter Dish Reflector
Band Applications contains characteristics of high directivity, extremely low side lobes, pencil beam radiation pattern and high gain [3].As a result, they are widely used in the fields of point to point and satellite communication at A dish antenna has a reflector, which is a section of a normal parabolic reflector. If the section does not include at the center of the reflector, then none of the radiated beam is received by Low Noise Block (LNB) the in feed antenna and support structure. For small dishes, feed blockage in an axial feed dish causes a significant loss in efficiency. In this paper, using a fiberglass material to for the parabolic reflector instead of metal is considered.
The value of f/d employed is 0.43 for efficient performance. The higher the ratio of f/d the shallower the dish, with higher directivity and gain [4].
f/d = focal length to diameter ratio The depth of the dish, D is given as The dish aperture Ap is given as The E-field and H-field are given by [5] ) )( cos 1 ( 4 The parabolic reflector gain, G is given by [6] G=(4πϵ G P A P )/λ (6) The reflection coefficient ρ is given as

RESULTS AND DISCUSSION
The simulation of the parameters for the antenna was done using Design Expert software (6.8.0) design System, Fig. 1 Shows the radiation pattern side lobes in polar form; Fig.2