Tapered slot antenna with balun slot line and stripline feed

Details Tapered slot antenna with balun slot line and stripline feed Tapered slot antenna with balun slot line and stripline feed

1990-05-17

1991-07-30

Wimer, Michael C.

Communications: radio wave antennas

Antennas

Slot type

343859, H01Q 138, H01Q 1308

Patent

active

050363352

ABSTRACT:
An exponentially tapered slot (Vivaldi) antenna for producing an end-fire beam. The antenna features a novel balun for coupling with a feed line. The conventional Vivaldi antenna is fed by means of a stripline section (1) underlying the ground plane (5) and lying perpendicular to the axis of the slot line (3). This balun arrangement has an inherent narrow bandwidth. In the proposed antenna arrangement the slot line (14) and the stripline (16) each have a 45.degree. twist centered on a common cross-over point (X.sub.o,Y.sub.o). The stripline (16) is terminated by a short-circuit to the ground plane (12) and the slot line (14) is terminated by an open-circuit in the form of a circular slot (15). The E-plane and H-plane radiation characteristics are similar to those of the conventional Vivaldi antenna, but the arrangement has a broadband capability enabling operation over any 3 to 1 bandwidth in the frequency range 1 to 40 GHz.

REFERENCES:
patent: 4843403 (1989-06-01), Lalezari et al.
patent: 4853704 (1989-08-01), Diaz et al.

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