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This paper presents a bandwidth enhancing technique using a modified ground plane with diagonal edges, L-shaped slot and parasitic patches with main patch for the design of compact antennas. The proposed low-cost, compact-size rectangular patch antenna on 4.7 cm × 3.6 cm printed circuit board (FR-4) is designed and validated through simulations and experiments. Results show that the ground plane with Lshaped slot in presence of the diagonal cuts at the top corners and the rectangular parasitic patches can increase the bandwidth. Return losses of −23.6 dB and −29.7 dB for the first and second resonant frequencies, respectively, can be achieved when the depth of the diagonal cut is 3 mm, the dimension of each rectangular parasitic patch is 10 mm×3.5 mm, and the L-shaped slot size is 7.5 mm ×2.5mm, providing a 41.27% wider bandwidth than Federal Communication Commission's(FCC) standard. General TermsDesigning of Microstrip Antenna.

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In this paper, a compact design and cons broadband antenna is proposed. The proposed antenna operating between 1.8GHz to 12GHz. The antenna p domain analysis has been investigated to show its cap radiating element. The simulation results demonstra linear transmission performance. A prototype is develo results are well in agreement. The highest efficiency cl and minimum efficiency is 70%. The measured E-plane pattern in the entire bandwidth are identical in shape maximum radiation is normal to the patch geometry. The a modified ground plane with diagonal edges, L-shaped slot main patch for the design of compact antennas. The propo ze rectangular patch antenna on 4.7cm × 3.6cm printed cir gned.