ground based antenna

См. также в других словарях:

• Antenna (radio) — Whip antenna on car …   Wikipedia

• Ground-penetrating radar — (GPR) is a geophysical method that uses radar pulses to image the subsurface. This non destructive method uses electromagnetic radiation in the microwave band (UHF/VHF frequencies) of the radio spectrum, and detects the reflected signals from… …   Wikipedia

• Antenna tuner — An antenna tuner, transmatch, or antenna tuning unit (ATU) matches a transceiver with a fixed impedance (typically 50 ohms for modern transceivers) to a load (feed line and antenna) impedance which is unknown, complex or otherwise does not match …   Wikipedia

• Dipole antenna — A schematic of a half wave dipole antenna connected to an unbalanced coaxial cable. Better practice is to connect the balanced dipole to the unbalanced line with a balun. A dipole antenna is a radio antenna that can be made of a simple wire, with …   Wikipedia

• Laser Interferometer Space Antenna — For other uses of this acronym, see LISA (disambiguation). Laser Interferometer Space Antenna Artist s conception of LISA spacecraft Operator ESA, NASA Satellite of Sun The Laser Interfe …   Wikipedia

• Parabolic antenna — A parabolic satellite communications antenna at Erdfunkstelle Raisting, the biggest facility for satellite communication in the world, in Raisting, Bavaria, Germany. It has a Cassegrain type feed. A parabolic antenna is an antenna that uses a… …   Wikipedia

• Omnidirectional antenna — The radiation pattern of a simple omnidirectional antenna, a vertical half wave dipole antenna. In this graph the antenna is at the center of the donut . Radial distance from the center represents the power radiated in that direction. The power… …   Wikipedia

• Choke ring antenna — Patent Diagram of a Choke Ring Antenna[1] A choke ring antenna is a particular form of omnidirectional antenna for use at high frequencies. It consists of a number of conductive concentric cylinders around a central antenna. Due to its delicate… …   Wikipedia

• Laser Interferometry Space Antenna — The Laser Interferometer Space Antenna (LISA) is a mission that will detect and study gravitational waves coming from sources involving massive black holes and galactic binaries.As the first dedicated space based gravitational wave observatory,… …   Wikipedia

• Sea-based X-band Radar — is a floating, self propelled, mobile radar station designed to operate in high winds and heavy seas. It is part of the United States Government s Ballistic Missile Defense System.The Sea Based X Band Radar is mounted on a 5th generation… …   Wikipedia

• Metamaterial antenna — This Z antenna tested at the National Institute of Standards and Technology is smaller than a standard antenna with comparable properties. Its high efficiency is derived from the Z element inside the square that acts as a metamaterial, greatly… …   Wikipedia