Microwave transition using dielectric waveguides

Details Microwave transition using dielectric waveguides Microwave transition using dielectric waveguides

1995-08-30

1997-11-04

Gensler, Paul

Communications: radio wave antennas

Antennas

Wave guide type

333 21R, 333248, 333251, H01Q 1302

Patent

active

056844956

ABSTRACT:
A microwave antenna comprises a single moded metal waveguide tapering inwardly to a cutoff dimension near the distal end thereof. The antenna also comprises a first solid dielectric waveguide mounted coaxially within the distal end portion of the metal waveguide and tapering outwardly toward the inwardly tapering portion of the metal waveguide. The first dielectric waveguide extends beyond the distal end of the metal waveguide in the axial direction. The antenna also comprises a second dielectric waveguide surrounding the first dielectric waveguide beyond the distal end of the metal waveguide and having a dielectric constant lower than the dielectric constant of the first dielectric waveguide. A distal end portion of the first dielectric waveguide tapers inwardly toward the axis thereof, to launch signals propagating toward the distal end of the first dielectric waveguide into the second dielectric waveguide.

REFERENCES:
patent: 3216017 (1965-11-01), Moore
patent: 4274097 (1981-06-01), Krall et al.
patent: 4307938 (1981-12-01), Dyott
patent: 4482899 (1984-11-01), Dragone
patent: 4630316 (1986-12-01), Vaughan
patent: 4673947 (1987-06-01), Newham
patent: 5017937 (1991-05-01), Newham et al.
Kobayashi et al. "Dielectric Tapered Rod Antennas for Millimeter-Wave Applications", IEEE Transactions on Antennas and Propagation, vol. AP-30, No. 1, pp. 54-58, Jan. 1982.
Buckingham et al. "Low-loss Polypropylene for Electrical Purposes", PROC.IEE, vol. 114, No. 11, pp. 1810-1814, Nov. 1967.

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