Compact antenna structures including baluns

Details Compact antenna structures including baluns Compact antenna structures including baluns

1997-10-20

1999-09-07

Wong, Don

Communications: radio wave antennas

Antennas

Balanced doublet - centerfed

343790, 343700MS, 343820, H01Q 916, H01Q 124

Patent

active

059493836

ABSTRACT:
An antenna structure includes a center feed dipole antenna having first and second radiating sections that extend along a substrate from a center feed point. A feed section is electrically coupled to the center feed point. The feed section includes a radio frequency input line and a ground line extending along the substrate adjacent one another. A balun extends along the substrate between the first radiating section and the ground line. The first radiating section, the radio frequency input line, the ground line and the balun preferably extend along the substrate in parallel. A tuning shunt may also be provided across the balun for dual band operation. Accordingly, compact dual band antenna structures including baluns may be provided.

REFERENCES:
patent: 2297513 (1942-09-01), Von Baeyer
patent: 4495505 (1985-01-01), Shields
patent: 4746925 (1988-05-01), Toriyama
patent: 4825220 (1989-04-01), Edward et al.
patent: 5387919 (1995-02-01), Lam et al.
patent: 5440317 (1995-08-01), Jalloul et al.
patent: 5526003 (1996-06-01), Ogawa et al.
patent: 5532708 (1996-07-01), Krenz et al.
International Searh Report, PCT/US98/21284, Feb. 9, 1999.
Johnson et al., "Antenna Engineering Handbook, Second Edition", McGraw-Hill Book Company, pp. 42-8,42-10--42-13, 43-43--43-27.
IBM Technical Disclosure Bulletin, "Printed Dipole With Printed Balun", vol. 40, No. 6, Jun. 1997, pp. 127-130.

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