Communications: radio wave antennas – Antennas – With grounding structure
Patent
1998-02-06
1999-07-20
Wong, Don
Communications: radio wave antennas
Antennas
With grounding structure
343795, 343700MS, H01Q 148
Patent
active
059261501
ABSTRACT:
A compact, broadband antenna derived from the inverted-F antenna configuration is disclosed. The tapered inverted-F antenna (TIFA) is able to generate high intensity electric fields with a physically small package size, making it particular useful for electromagnetic compatibility testing applications. This antenna derives its broadband characteristics from the combination of a number of unique features. The TIFA utilizes radiating elements that are broadband planar frames or planar sheets. The planar frames provide extended performance at low frequencies and may also include an interior lattice structure of various configurations. The novel use of triangular or "bowtie" elements for the feed and shunt elements of the TIFA provides extended performance at high frequencies. When suitably configured and properly matched to a log-periodic dipole array, the antenna is capable of providing high intensity electric fields with a very wide useful bandwidth. The invention may be configured in either an unbalanced or a balanced configuration.
REFERENCES:
patent: 4506267 (1985-03-01), Harmuth
patent: 5365246 (1994-11-01), Rasinger et al.
patent: 5434579 (1995-07-01), Kagoshima et al.
S. J. Porter & A. C. Marvin, "A New Broadband EMC Antenna for Emissions and Immunity", International Symposium on Electromagnetic Compatibility, Sep. 13-16, 1994, Rome, Italy.
Crook Gentry
McLean James
Nguyen Hoang
Tactical Systems Research, Inc.
Wong Don
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