Ultra-Compact 1.8GHz Microstrip Antenna Using Defected Ground Structure

In this letter, we have presented a microstrip patch antenna. Physical size reduction and low cost are the trends that are centralized in today’s developing technology. The simulated and fabricated results of an ultra that operates in 1.8GHz is discussed. Even t compromises are made such as low gain, narrow bandwidth etc., still this antenna provides promising features and parameters that are suitable for certain applications depending requirements. The ultra-compact size is achieved by introducing DGS in the ground plane. The antenna including the ground pla has a total dimension of 17.78 mm × 17.78 mm × 1.6 mm. The proposed antenna is designed and fabricated with F with a dielectric constant of 4.4.The antenna operates at 1.8 with a reflection co-efficient of -17.04dB. A size reduction of 68 is achieved when compared to the traditional 1.8 antenna that is obtained through the design equations radiating efficiency of 76% is achieved. This compact narrowband antenna has a wide scope in wireless communication system applications.