Antenna diversity system
作者： David H. Evans , Kevin R. Boyle , Richard J. Caldwell
DOI:
关键词: Electronic engineering 、 Engineering 、 Omnidirectional antenna 、 Reconfigurable antenna 、 Dipole antenna 、 Antenna tuner 、 Antenna measurement 、 Antenna (radio) 、 Electrical engineering 、 Directional antenna 、 Beam waveguide antenna
摘要: An antenna diversity system comprises at least two antennas (202, 212). In a first embodiment each is connected via common connection point (222) to receiver (224), by means of respective switch (204, 214) which presents low impedance between the and in on state substantially reactive load (210, 220) 212) off state. Selection appropriate impedances for enables function as an array with variety beam patterns depending switches 214). Cycling through sequence states steers providing improved resistance fading multipath effects. second are hybrid coupler, be available simulaneously signal quality measurement comparison.
lens.org 参考文章(23)
George J. Monser, Dual-polarization, omni-directional antenna system ,(1987)
Erkki Kuisma, Antenna selection switch for a diversity antenna ,(1991)
Kyo Kinoshita, Yujiro Ishikawa, Diversity receiving system ,(1976)
Alan J. Glickman, Thomas F. Carlson, Array beamformer using unequal power couplers for plural beams ,(1991)
Richard C. Fenwick, Multi-band directional antenna ,(1977)
Henry S. Eilts, John P. Volpi, Eldon L. Gordon, Directed reception pattern antenna ,(1993)
Arogyaswami Joseph Paulraj, Vincent Knowles Jones, Suhas Nagraj Diggavi, Gregory Gene Raleigh, Method and apparatus for adaptive transmission beam forming in a wireless communication system ,(1996)
Don Michael Pritchett, A communication system and methods utilizing a reactively controlled directive array ,(1996)
Andrew William Widdington Saffron Walden Jeffries, Martin Stevens Chelmsford Essex Smith, Christopher Robert Bishops Stortford Ward, Multi-beam antenna system for cellular radio base stations ,(1998)
Lennart Hans Rinnback, David Anthony Smith, Communication system and method utilizing an antenna having adaptive characteristics ,(1995)