phased-array antenna


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phased-array antenna

phased-array antennaclick for a larger image
Phased array may be very simple, consisting of only two elements. Two examples of simple pairs of phased dipoles are shown in the illustration. On the left, two dipoles are spaced quarter wavelength apart in free space, and they are fed 90 degrees out of phase. This results in addition of phase in one direction and cancellation in the other. In this case, radiation pattern is unidirectional. However, phased array may have directional patterns with two, three, or even four different optimum directions. A bi-directional pattern can be obtained by spacing the dipoles at one wavelength and feeding them in phase as is shown in the illustration on the right.
An antenna that consists of a number of elements and in which the direction of the beam can be changed by varying the relative phase of the signal applied to each of these elements. The phased-array antenna scans electronically.
References in periodicals archive ?
Karmakar, "A Compact Photonic Bandgap Assisted Phased-array Antenna," Asia-Pacific Microwave Conference Proceedings, Seoul, South Korea, November 2003.
One of these on display at the MAKS 2001 show featured a forward antenna based on a special phased-array antenna linked with circular antennas.
Highwall Enterprise leverages the high-range sensor and phased-array antenna to monitor the airwaves and communicate back to a central management server.
Ericsson and IBM will research phased-array antenna techniques to develop prototype systems that will serve more mobile users, enable a multitude of new services on the same frequency, as well as offer data speeds that are orders of magnitude faster than today - competitive to existing cable and wired internet access speeds.
Our new patented technology and other innovations enabled KVH to create a hybrid phased-array antenna that is affordable to consumers and brings outstanding satellite TV entertainment into cars.
On Monday, Ericsson (ERIC) and IBM have entered into collaboration to jointly research phased-array antenna designs for 5G.
Topics: theory and applications of the measurement of antennas and radar scattering, advances in indoor and outdoor test ranges, measurement standards and laboratory comparisons, advances in near-field, far-field and RCS measurement techniques, new instruments for testing, data acquisition and processing methods, diagnostic methods, imaging techniques, phased-array antenna testing, and EMI/EMC/PIM chamber design, measurements and instruments.
For a phased-array antenna, delay lines are used to create a coherent addition of signals received by many array elements (antennas) when those signals arrive from a single direction, thereby forming a narrow antenna beam.
LAS VEGAS -- MB Tech (OTC BB:MBTT) has recently made important development breakthroughs with its silicon chip-based phased-array antenna system with its partner Teltron.
With a fully solid-state four-panel phased-array antenna, Sea Fire 500 is designed for large surface combatants.
The phased-array antenna, among the most nimble of all antennas, is probably the best known of the multiple-function antennas.
KVH now offers an integrated solution that makes live satellite TV practical and affordable in cars through its hybrid phased-array antenna technology and the company's collaboration with DIRECTV, the leading satellite TV provider in North America.