Compact antenna with directed radiation pattern
First Claim
Patent Images
1. A balanced compact antenna, comprising:
- first and second signal inputs;
a first conductor line comprising a first portion extending from the first signal input in a first direction, a second portion extending from an end of the first portion a length L in a second direction, a third portion extending from an end of the second portion a length L1 in a third direction, and a fourth portion extending from an end of the third portion a length L2 in a fourth direction, the third direction being substantially parallel to the first direction, the second direction being substantially perpendicular to the first direction, and the fourth direction being substantially opposite to the second direction;
a second conductor line comprising a fifth portion extending from the second signal input in a fifth direction, a sixth portion extending from an end of the fifth portion a length L in a sixth direction, a seventh portion extending from an end of the sixth portion a length L1 in a seventh direction, and an eighth portion extending from an end of the seventh portion a length L2 in a eighth direction, the fifth direction being substantially opposite to the first direction, the seventh direction being substantially parallel to the fifth direction, the sixth direction being substantially perpendicular to the fifth direction, and the eighth direction being substantially opposite to the sixth direction; and
a third conductor line extending a length H from a center of the third conductor line toward both a first midpoint in the first conductor line and a second midpoint in the second conductor line, the third conductor line being separated from the first or second signal input by a distance d.
1 Assignment
0 Petitions
Accused Products
Abstract
The present invention includes a balanced compact antenna, conforming to the envelope restrictions appropriate to a PC-card form factor, with maximum radiation intensity along a long axis of the card. The inventive antenna configuration employs an inductive shorting bar to match an “M”-shaped bent dipole antenna to a differential feed. The combination of horizontal cross-members and large vertical downward legs ensures radiation predominantly in a broadside direction while keeping the dimensions of the antenna sufficiently compact to fit within the PC-card envelope.
-
Citations
20 Claims
-
1. A balanced compact antenna, comprising:
-
first and second signal inputs; a first conductor line comprising a first portion extending from the first signal input in a first direction, a second portion extending from an end of the first portion a length L in a second direction, a third portion extending from an end of the second portion a length L1 in a third direction, and a fourth portion extending from an end of the third portion a length L2 in a fourth direction, the third direction being substantially parallel to the first direction, the second direction being substantially perpendicular to the first direction, and the fourth direction being substantially opposite to the second direction; a second conductor line comprising a fifth portion extending from the second signal input in a fifth direction, a sixth portion extending from an end of the fifth portion a length L in a sixth direction, a seventh portion extending from an end of the sixth portion a length L1 in a seventh direction, and an eighth portion extending from an end of the seventh portion a length L2 in a eighth direction, the fifth direction being substantially opposite to the first direction, the seventh direction being substantially parallel to the fifth direction, the sixth direction being substantially perpendicular to the fifth direction, and the eighth direction being substantially opposite to the sixth direction; and a third conductor line extending a length H from a center of the third conductor line toward both a first midpoint in the first conductor line and a second midpoint in the second conductor line, the third conductor line being separated from the first or second signal input by a distance d. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. A compact antenna for transmitting RF signals, comprising:
-
first and second signal inputs; first and second conductor lines extending from respective ones of the first and second signal inputs, each conductor line comprising a riser and a radiating cross member; and a third conductor line extending between the risers of the first and second conductor lines; and wherein when a RF signal is supplied to the first and second signal inputs, radiation from currents in the radiating cross members add substantially in-phase to radiation from currents in the third conductor line while radiation from currents in the riser in the first conductor line substantially cancels radiation from currents in the riser in the second conductor line. - View Dependent Claims (15, 16, 17, 18, 19, 20)
-
Specification