Communications: radio wave antennas – Antennas – With coupling network or impedance in the leadin
Patent
1998-08-03
2000-09-19
Le, Hoanganh
Communications: radio wave antennas
Antennas
With coupling network or impedance in the leadin
343701, H01Q 150
Patent
active
061219401
ABSTRACT:
A broadband impedance matching circuit employs active circuits featuring non-Foster reactance behavior, such as negative capacitor circuits and negative inductor circuits, to achieve extremely broadband matching of electrically small antennas. The matching circuit includes at least one non-Foster reactance circuit selected to neutralize the reactance exhibited by the antenna. The circuit further includes a dynamic dispersive impedance transformer circuit which compensates for the frequency dependent radiation resistance presented by the electrically small antenna. The dynamic dispersive impedance transformer is constructed using complementary Foster and non-Foster reactance circuits configured as an impedance transformer.
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Pierro John A.
Rudish Ronald M.
Skahill George
Ail Systems, Inc.
Le Hoang-anh
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