Design of 3D Printed Slotted Waveguide Antenna Array by Using Composite Material for Frequency S-Band

This paper design slotted waveguide antenna array (SWAA) at s-band frequency for Radio detection and ranging (RADAR) surveillance applications when scanning targets. The slotted waveguide technique in this design is realized using 3d printed composites made of copper coated which can be obtained by electroplating, imitation chrome, conductive paint and other coating techniques. Determine waveguide slots in designing array a very important part so that it can accommodate the needs of radar applications, namely having a gain the big one, bandwidth and power handling tall one. Metals such as copper and aluminum are widely used. Their high metallic conductivity values provide high shielding effectiveness and low antenna loss. However, the disadvantages of metals are their high weight, production costs and poor corrosion resistance. Therefore, an alternative emerged to overcome these weaknesses by using material copper coating on Abs composite. Due to its light weight, ease of fabrication, low cost, high rigidity, high thermal and electrical conductivity. The simulated CST result of a SWAA with a length 1.5 meters with Abs composite material with a thickness of 2 mm and copper layer thickness of 0.035 show that the proposed antenna operates at frequency of 2.9 GHz to 3.1 GHz, the gain of antenna is 17.54 dBi, with S11 −17.6 dBi and SLL −11.5 dB.