Electrically small wideband antenna

Details Electrically small wideband antenna Electrically small wideband antenna

2006-10-17

2006-10-17

Phan, Tho (Department: 2821)

Communications: radio wave antennas

Antennas

With radio cabinet

C343S7000MS

Reexamination Certificate

active

07123198

ABSTRACT:
An antenna (100) comprises an input port (109, 213) for feeding an electrical signal, a radiating element (220) coupled to the input port that radiates energy of the electrical signal, a second port (110, 211) coupled to the radiating element, a ground structure (214) coupled to the radiating element and second port; and a negative slope reactance circuit (120) characterized by a negative slope of reactance versus frequency, coupled to the second port. The antenna has a wideband frequency range relative to a natural bandwidth of the antenna.

REFERENCES:
patent: 3656167 (1972-04-01), Lea
patent: 4443803 (1984-04-01), DeSantis et al.
patent: 4570134 (1986-02-01), Woodward

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