Low weight ii. Inexpensive iii. Easily produced iv. Low volume v. Low profile planar configuration that can be easily conformed to the host surface vi. Capable of dual- and triple-frequency operations with integrated circuitsMicrostrip Antenna DisadvantagesMicrostrip patch antennas suffer from a number of disadvantages compared to conventional antennas. I. Inherently narrow bandwidth ii. Low efficiency iii. Inherently low earnings iv. Low power handling capability with respect to surface wave excitation Table 2 shows the properties of different substrates for microstrip patch antenna design S/n Parameter Bakelite FR4 RO4003 Taconic RT Duriod1 Dielectric constant 4.78 4.36 3, 4 3.2 2.22 Tangent loss 0.03045 0.013 0.002 0.002 0.00043 Water absorption 0. 5-1.3 % Peel strength 60kv8 - 9N/nm 1.05N/nm 12N/nm