Microstrip Antenna: What is Low Profile?

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The term "low profile" in microstrip antennas refers to their thin and flat physical shape, which allows them to be easily integrated into various surfaces without protruding significantly. This characteristic makes them ideal for applications where space is limited, such as in mobile devices and vehicles. Low profile antennas typically have a narrow bandwidth and wide radiation patterns, contributing to their versatility. The design involves etching the antenna element onto a dielectric substrate, which enhances their compactness. Overall, low profile is a key attribute that defines the practicality and functionality of microstrip antennas in modern technology.
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I found in many sources describing microstrip antennas are 'low profile'. Well, I know several antenna parameters like radiation pattern, antenna gain, intensity, directivity etc. But what is this 'low profile'?? Can anyone tell me what sort of property of an antenna does the term 'low profile' indicate? Thanks in advance.
 
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I'm pretty sure "low profile" refers to the physical shape of the antenna.

From http://en.wikipedia.org/wiki/Microstrip_antenna:
A [microstrip] antenna is a narrowband, wide-beam antenna fabricated by etching the antenna element pattern in metal trace bonded to an insulating dielectric substrate [...]
 
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