The microstrip antennas are very practical in wireless systems providing simplicity and the cost effective value of production and modeling. Microstrip antenna size is not subject to its manufacturing techniques, but to some extent it depends on their guided wave length at its fundamental resonant frequency in mobile communications and wireless networks. The most commonly used miniature antennas have been Planar Inverted F Antennas (PIFAs) and shorted patches. Potential decrease of antenna sizes can be accomplished through patch resonators.
Papers:
Chen WS, A Novel Broadband Design of a Printed Rectangular Slot Antenna for Wireless Applications. Microwave Journal. 2006 Jan; Reprinted by Horizon House Publications, Inc., 2006.
Virga KL, Rahmat-Samii Y, Low-profile enhanced-bandwidth PIFA antennas for wireless communications packaging. IEEE Transactions on Microwave Theory and Techniques. 1997; 45(10): 1879 - 1888.
G. Kumar, “Broadband Microstrip Antennas,” Artech House, Inc., 2003.