Wideband multifunction antenna operating in the HF range, particularly for naval installations
First Claim
1. A linear antenna, comprising:
- a first plurality of wire radiating elements extending predominantly in a first direction and forming;
a first conducting branch having a connection configured to receive radio frequency signals;
a second conducting branch having a connection configured to receive radio frequency signals; and
a return conducting branch having a connection configured to couple to a reference voltage;
a second plurality of wire radiating elements forming connecting conducting branches between the first and second conducting branches and the return conducting branch, the first and second pluralities of radiating elements are configured to form, in a plane of the antenna, two nested paths between the respective connections of the first and second branches and the connection of the return branch, the paths having at least one radiating element in common; and
a plurality of electrical impedance devices interposed along the conducting branches and configured to impede flow of current within selected frequency ranges to establish selectively, according to an operating frequency, a plurality of different current paths along the conducting branches corresponding to a plurality of different electrical and/or geometrical configurations of the antenna.
1 Assignment
0 Petitions
Accused Products
Abstract
A linear antenna for operation in the HF frequency range, particularly for naval communications is disclosed, comprising a radiating arrangement (H1, H2, H3, W1, W2), adapted to be operatively associated with a ground conductor (20) and at least one electrical impedance device (Z1-Z4), characterized in that it includes: a plurality of wire radiating elements with a predominantly vertical extension, forming a first and a second conducting branch (H1, H2) adapted to be operatively coupled to a feed circuit, and a return conducting branch (H3) adapted to be operatively coupled to a ground conductor (20); and a plurality of wire radiating elements with a predominantly transverse extension, forming connecting conducting branches (W1, W2) for connecting the conducting branches (H1, H2) adapted to be coupled to the feed circuit (12), to the conducting branch (H3) adapted to be coupled to the ground conductor (20), the radiating elements being positioned in such a way as to form, in a plane in which the antenna lies, two nested closed paths (P1, P2) between the feed circuit (12) and the ground conductor (20), having at least one radiating element in common, and—a plurality of electrical impedance devices (Z1-Z4) interposed along the conducting branches (H1, H2, H3, W1, W2) and adapted to impede the flow of current within corresponding predetermined frequency ranges in such a way as to establish selectively, according to the operating frequency, a plurality of different current paths along the conducting branches (H1, H2, H3, W1, W2), corresponding to a plurality of different electrical and/or geometrical configurations of the antenna (10).
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Citations
32 Claims
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1. A linear antenna, comprising:
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a first plurality of wire radiating elements extending predominantly in a first direction and forming; a first conducting branch having a connection configured to receive radio frequency signals; a second conducting branch having a connection configured to receive radio frequency signals; and a return conducting branch having a connection configured to couple to a reference voltage; a second plurality of wire radiating elements forming connecting conducting branches between the first and second conducting branches and the return conducting branch, the first and second pluralities of radiating elements are configured to form, in a plane of the antenna, two nested paths between the respective connections of the first and second branches and the connection of the return branch, the paths having at least one radiating element in common; and a plurality of electrical impedance devices interposed along the conducting branches and configured to impede flow of current within selected frequency ranges to establish selectively, according to an operating frequency, a plurality of different current paths along the conducting branches corresponding to a plurality of different electrical and/or geometrical configurations of the antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 12, 13, 14, 15)
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- 9. The linear antenna of 1 wherein the electrical impedance devices are two-terminal reactive circuits with lumped parameters.
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16. A system, comprising:
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a linear antenna, having; a first plurality of radiating elements extending predominantly in a first direction and forming; a first conducting branch; a second conducting branch; and a return branch coupled to a ground; a second plurality of radiating elements forming connecting branches between the first and second conducting branches and the return branch; and a plurality of electrical impedance devices interposed along the branches; and a radio-frequency signal matching and distribution unit coupled to the first and second conducting branches and having; an impedance step-up transformer circuit coupled to the ground and between a signal transmission line and the conducting branches; and a pair of impedance matching resistors interposed between the transformer circuit and the conducting branches, wherein the first and second pluralities of radiating elements are configured to form, in a plane of the antenna, a plurality of nested paths between respective connections of the first and second branches to the radio-frequency signal matching and distribution unit and a connection of the return branch to the ground, the paths having at least one radiating element in common, and the plurality of electrical impedance devices are configured to impede current flow within selected frequency ranges to establish selectively, according to an operating frequency, current paths along the branches corresponding to a plurality of different electrical and/or geometrical configurations of the antenna. - View Dependent Claims (17, 18)
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19. A linear antenna, comprising:
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a first plurality of radiating elements extending predominantly in a first direction and configured to form; a first conducting branch having a connection configured to receive radio frequency signals; a second conducting branch having a connection configured to receive radio frequency signals; and a return branch having a connection configured to couple to a ground; a second plurality of wire radiating elements configured to form; a first connecting branch coupled between the first conducting branch and the return branch, wherein the first conducting branch, the first connecting branch and the return branch form an outer path; and a second connecting branch coupled between the second conducting branch and the return branch, wherein the second conducting branch, the second connecting branch and the return branch form an inner path nested in the outer path, the outer and inner paths having at least part of the return branch in common; and a plurality of electrical impedance devices interposed along the branches and configured to impede current flow within selected frequency ranges to establish selectively, according to an operating frequency, a plurality of different current paths along the branches corresponding to a plurality of different electrical and/or geometrical configurations of the antenna. - View Dependent Claims (20, 21, 22, 23, 24, 25, 29, 30, 31, 32)
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- 26. The linear antenna of 19 wherein the electrical impedance devices are two-terminal reactive circuits with lumped parameters.
Specification