|Image of the Triangular pin-fed patch.|
Patch antennas are popular for their well-known attractive features, such as low profile, light weight and compatibility with MMICs. Their main disadvantage is an intrinsic limitation in bandwidth, which is due to the resonant nature of the patch structure. The bandwidth of a patch antenna can be increased by increasing the height of the substrate.
Modern communication systems as found in GPS, vehicular, WLAN, etc., often require compact, low-cost antennas, making planar technology extremely useful and sometimes unavoidable.