Transmission line notch antenna

Details Transmission line notch antenna Transmission line notch antenna

1994-12-02

1995-11-14

Hajec, Donald T.

Communications: radio wave antennas

Antennas

Slot type

343749, 343752, 343795, 343797, H01Q 1310

Patent

active

054670985

ABSTRACT:
Non-resonant, end fire antennae that operate over broad frequency bands, can be incorporated into arrays and have low RF cross-sections are constructed from a transmission line, usually a piece of coaxial cable that if it is not self supporting, is mounted on or in a lightweight structural material with an outer end with a sheath or stripline the shape of half of a notch. The other half of the notch is formed from a conductor electrically connected to the center conductor of the coaxial cable. The cable and conductor are variably spaced to transition the characteristic impedance of the cable to that of free space. The conductor and the sheath are terminated either with ground connections or by inductive loads.

REFERENCES:
patent: 3007164 (1961-10-01), Davis
patent: 4500887 (1985-02-01), Nester

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