Microstrip Antenna :
It is also called “patch antennas” as shown in figure.
▪ One of the most useful antennas at microwave frequencies (f > 1 GHz).
▪ It consists of a metal “patch” on top of a grounded dielectric substrate.
The patch may be in a variety of shapes, but rectangular and circular are the most common
Advantages of Microstrip Antennas:
➢ Easy to fabricate (use etching and photolithography).
➢ Easy to feed (coaxial cable, Microstrip line, etc.) .
➢ Easy to use in an array or incorporate with other Microstrip circuit elements.
➢ Patterns are somewhat hemispherical, with a moderate directivity (about 6-8 dB is typical).
➢ Light weight, smaller size and lesser volume
Disadvantages of Microstrip Antennas:
➢ Low bandwidth
➢ Low efficiency
➢ Low gain