What does QYA stand for?

They cover fundamental wideband printed antennas such as multilayered patch antennas, printed quasi-Yagi antennas, printed spiral antennas, printed folded "beverage" antennas and printed slot antennas, applications in wireless systems, such as planar inverted-F antennas, small patch-based antennas, small multiband printed monopole antennas, and printed antennas in packages, and advanced concepts such as printed reflectarray antennas, antennas on artificial magnetic conductors, transceiver architectures for highly integrated RF front-ends, frequency-agile antennas for a software-define and cognitive radio, and antenna evaluation for communications with diversity and multiple input/multiple output.