Antenna

Details Antenna Antenna

1997-02-21

1999-01-12

Le, Hoanganh T.

Communications: radio wave antennas

Antennas

Spiral or helical type

343821, 343859, H01Q 136

Patent

active

058596216

ABSTRACT:
An antenna for use at frequencies of 200 MHz and upwards has a cylindrical ceramic core with a relative dielectric constant of at least 5, and pairs of helical elements extending from a feed point at one end of the core to the rim of a conductive sleeve adjacent the other end of the core, the sleeve acting as a trap for isolating from ground currents circulating in the helical elements. To yield helical elements of different lengths, the sleeve rim follows a locus which deviates from a plane perpendicular to the core axis in that it describes a zig-zag path. The helical elements form simple helices with approximately balanced radiation resistances.

REFERENCES:
patent: 2575377 (1951-11-01), Wohl
patent: 2763003 (1956-09-01), Harris
patent: 3633210 (1972-01-01), Westerman
patent: 3906509 (1975-09-01), DuHammel
patent: 3940772 (1976-02-01), Ben-dov
patent: 4008479 (1977-02-01), Smith
patent: 4114164 (1978-09-01), Greiser
patent: 4160979 (1979-07-01), Drewett
patent: 4204212 (1980-05-01), Sindoris et al.
patent: 4270128 (1981-05-01), Drewett
patent: 4323900 (1982-04-01), Krall et al.
patent: 4349824 (1982-09-01), Harris
patent: 4608572 (1986-08-01), Blakney et al.
patent: 4608574 (1986-08-01), Webster et al.
patent: 4697192 (1987-09-01), Hofer et al.
patent: 4862184 (1989-08-01), Ploussios
patent: 4940992 (1990-07-01), Nguyen et al.
patent: 4980694 (1990-12-01), Hines
patent: 5081469 (1992-01-01), Bones
patent: 5099249 (1992-03-01), Seavey
patent: 5134422 (1992-07-01), Auriol
patent: 5255005 (1993-10-01), Terret et al.
patent: 5258728 (1993-11-01), Taniyoshi et al.
patent: 5298910 (1994-03-01), Takei et al.
patent: 5329287 (1994-07-01), Strickland
patent: 5341149 (1994-08-01), Valimaa et al.
patent: 5345248 (1994-09-01), Hwang et al.
patent: 5346300 (1994-09-01), Yamamoto et al.
patent: 5349361 (1994-09-01), Egashira et al.
patent: 5349365 (1994-09-01), Ow et al.
patent: 5406296 (1995-04-01), Egashira et al.
patent: 5406693 (1995-04-01), Egashira et al.
patent: 5450093 (1995-09-01), Kim
patent: 5479180 (1995-12-01), Lenzing et al.
Krall, McCorkel, Scarzello, Syeles, Communications, IEEE Transactions on Antennas and Propagation, vol. AP-27, No. 6, Nov., 1979.
Casey, Square Helical Antenna with a Dielectric Core, IEEE Transactions on Electromagnetic Compatibility, vol. 30, No. 4, Nov. 1988.
Search Report for Gt. Britain Application No. GB 9606593.3, dated 25 Jun. 1995.

Affiliated with

Also associated with

Rating

Antenna does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Antenna, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1520486