Communications: radio wave antennas – Antennas – Including magnetic material
Patent
1997-09-09
2000-07-18
Wong, Don
Communications: radio wave antennas
Antennas
Including magnetic material
343767, 343770, H01Q 128
Patent
active
060913746
ABSTRACT:
An ultra-wideband magnetic antenna includes a planar conductor having a first and a second slot about an axis. The slots are substantially leaf-shaped having a varying width along the axis. The slots are interconnected along the axis. A cross polarized antenna system is comprised of an ultra-wideband magnetic antenna and an ultra-wideband dipole antenna. The magnetic antenna and the dipole antenna are positioned substantially close to each other and they create a cross polarized field pattern. The present invention provides isolation between a transmitter and a receiver in an ultra-wideband system. Additionally, the present invention allows isolation among radiating elements in an array antenna system.
REFERENCES:
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Chen, C. and Alexopoulos, N.G., "Radiation by Aperture Antennas of Arbitrary Shape Fed by a Covered Microstrip Line," IEEE Antennas and Propagation Society International Symposium Digest, vol. 4, Jun. 18, 1995, pp. 2066-2069.
Cox, R.M. and Rupp, W.E., "Circularly Polarized Phased Array Antenna Element," IEEE Transactions on Antennas and Propagation, Nov. 1970, pp. 804-807.
Papierz, A.B. et al., "Analysis of antenna structure with equal E- and H- plane patterns," Proc. Of the Institution of Electrical Engineers, vol. 124, No. 1, Jan. 1977, pp. 25-30.
Shlager, K.L. et al., "Optimization of Bow-Tie Antennas for Pulse Radiation," IEEE Transactions on Antennas and Propagation, vol. 42, No. 7, Jul. 1994, pp. 975-982.
Lamensdorf, D. and Susman, L., "Baseband-Pulse-Antenna Techniques," IEEE Antennas and Propagation Magazine, vol. 36, No. 1, Feb. 1994, pp. 20-30.
Clinger James
Time Domain Corporation
Wong Don
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