Communications: radio wave antennas – Antennas – Wave guide type
Patent
1988-01-14
1989-12-26
Hille, Rolf
Communications: radio wave antennas
Antennas
Wave guide type
343828, 333 21R, H01Q 1304
Patent
active
048901172
ABSTRACT:
In view of the introduction of cellular radio, there is a requirement for an antenna of simple construction which can be sold in a consumer market. While the invention meets this need it also has application to the problem of providing TM.sub.01 to TE.sub.01 made converters. The invention employs radial conductors printed on a dielectric substrate and aligned with the transverse electric field in a waveguide supporting the TM.sub.01 mode. Circumferential conductors, each coupled to one of the radial conductors, act as monopoles radiating the required field in an antenna where the radial conductors project through apertures in the waveguide. For the mode converter, both radial and circumferential conductors are inside the waveguide, with the radial conductors aligned with the transverse electric field of the TM.sub.01 mode. Arrangements for maximizing the field at the position of the radial and circumferential conductors are described as are means for preventing the propagation of unwanted modes.
REFERENCES:
patent: 2471021 (1949-05-01), Bradley
patent: 2954558 (1960-09-01), Honey et al.
patent: 3375474 (1968-03-01), Thompson et al.
patent: 3605099 (1971-09-01), Griffith
patent: 4041499 (1977-08-01), Liu et al.
patent: 4143377 (1979-03-01), Salvat et al.
Hille Rolf
National Research Development Corporation
Wimer Michael C.
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