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The antenna design is made on a FR4 substrate having dielectric constant of 4.4 and height of the dielectric substrate is chosen as 1.5 mm.50 Ω micro-strip feed lines are used to feed the radiating patch .By using T-power divider circuit micro-strip patch antenna array with same dimensions is designed on a same substrate.
Micro strip patch antenna (MPA); Micro strip patch antenna array (MPAA); Defected ground structure (DGS); Return loss; Directivity; Gain Major requirements of antennas in today’s wireless communication systems should have good performance parameters in terms of return loss, bandwidth, gain, radiation pattern, antenna efficiency.
Micro strip patch antennas fulfill all these requirements .
Antenna array is mainly used to improve the antenna parameters .
In the proposed antenna array, all the designing parameters are selected based on transmission line mode.
The array antenna consists of two single patches on the same substrate.
In this array antenna the gap between the antennas is 80 mm (Table 1; Figures 4 and 5).
Antenna array is combination of individual antennas together . This is because of their small size as compared with other shapes.
One of the techniques which are used to improve the performance of Microstrip patch antenna is using antenna array .
A micro strip antenna consists of three layers; one is a radiating patch, a dielectric substrate and a ground plane on the other side.
Radiating elements and feed lines are photo etched on the dielectric substrate (Figure 1) .