Perforated ground plane (PGP) structures have attracted the interest of RF and wireless applications (such as passive and active components, antennas, waveguides, and packaging), due to their interesting properties in terms of slow-wave effect, suppression of surface waves, high-impedance characteristics, and arbitrary stopbands (passbands). PGP structures are created by assembling a periodic or nonperiodic structure composed of elements in ground plane which are small compared to the wavelength of the propagating electromagnetic wave. As a consequence, PGP structures alter electromagnetic waves propagate in the RF and wireless system.

The objective of this special issue is to provide an in-depth description of the state-of- the-art of research and development in this area. We invite prospective researchers to submit original, high-quality research as well as review articles that cover the new challenges and recent applications in the field of PGP structures for RF and wireless components. Potential topics include, but are not limited to:

• Slotted ground structure
• Defected ground structure (DGS)
• Electromagnetic bandgap (EBG)
• Metamaterial in ground plane
• Frequency selective surfaces
• Slot antenna
• Packaging
• Reconfigurable RF and wireless components
• Optimization, computation, and measurement techniques
• RF and wireless applications

Before submission authors should carefully read over the journal's Author Guidelines, which are located at http://www.hindawi.com/journals/ijap/guidelines/. Prospective authors should submit an electronic copy of their complete manuscript through the journal Manuscript Tracking System at http://mts.hindawi.com/submit/journals/ijap/pgp/ according to the following timetable: