Microstrip Patch Antenna
Microstrip patch antenna or it can be called also printed antenna has many advantages relatively inexpensive to manufacture and design because of the simple dimensional. They are usually employed at UHF and higher frequencies because the size of the antenna is directly tied to the wavelength at the operating frequency.The patch is generally square, rectangular, circular, triangular, and elliptical or some other common shape as shown in Figure.
Common shapes of microstrip patch antenna
There are many advantages of using microstrip antenna in wireless applications.
Some of these advantages
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Light weight
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Very easy to integrate with MICs
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Mechanically good enough when mounted in rigid surfaces
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Can easily support linear and circular polarization
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Very low cost
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Low profile planner
Some of the disadvantages
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Narrow bandwidth
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Low efficiency
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Poor polarization
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Low gain
The three essential parameters Microstrip patch antenna are:
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Frequency of operation
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Dielectric constant of the substrate Er
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Height of dielectric substrate (h)
Final layout of Patch Antenna
Applications of Microstrip Antennas
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In mobile phones
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Satellites
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Cars
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Aircraft
Patch antenna in side a NOKIA cellular phone
Patch Antenna Point to point Station
