Antennas; Antenna parameter measuring apparatus; Data processing apparatus; Downloadable computer application software for mobile phones, portable media players, handheld computers, namely, software for testing and measuring radio frequency signals or electromagnetic fields; Downloadable computer software for testing and measuring radio frequency signals or electromagnetic fields; Electronic publications, namely, book, magazine, manual featuring radio frequency signals or electromagnetic recorded on computer media; Recorded computer software for testing and measuring radio frequency signals or electromagnetic fields; Surveying apparatus