Cylindrical electronically scanned antenna
First Claim
1. A cylindrical electronically scanned antenna, comprising:
- a set of radiating guides arranged in cylinder form to produce an antenna beam;
an array of 3 dB couplers in waveguide form having inputs and an outputs, the inputs of which are lit by a set of microwave feeds, the outputs of each coupler being coupled to the input of a radiating guide;
an array of pairs of phase-shifting cells, each coupled to a 3 dB coupler, an incoming wave (E) from the microwave feeds being phase-shifted by a controllable phase shift (Δ
φ
), the angular offset of the antenna beam being dependent on the phase shift (Δ
φ
),wherein the microwave feeds are arranged on a cylindrical circumference inside the cylinder formed by the set of radiating guides so that each feed lights a part of the array of couplers, the microwave feeds being activated in turn.
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Abstract
The present invention relates to a cylindrical electronically scanned antenna.
The antenna has:
a set of radiating guides (2) arranged in cylinder form for, producing the antenna beam (8); An array (3) of 3 dB couplers is arranged in waveguide form. The inputs of the array are lit by a set of microwave feeds (4). The output of each coupler is coupled to the input of a radiating guide (2). An array of pairs of phase-shifting cells is, each coupled to a 3 dB coupler. An incoming wave from the microwave feeds (4) is phase-shifted by a controllable phase shift Δφ. The angular offset of the antenna beam (8) is dependent on this phase shift Δφ. The invention is typically applicable for equipping masts, in particular on ships.
145 Citations
11 Claims
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1. A cylindrical electronically scanned antenna, comprising:
-
a set of radiating guides arranged in cylinder form to produce an antenna beam; an array of 3 dB couplers in waveguide form having inputs and an outputs, the inputs of which are lit by a set of microwave feeds, the outputs of each coupler being coupled to the input of a radiating guide; an array of pairs of phase-shifting cells, each coupled to a 3 dB coupler, an incoming wave (E) from the microwave feeds being phase-shifted by a controllable phase shift (Δ
φ
), the angular offset of the antenna beam being dependent on the phase shift (Δ
φ
),wherein the microwave feeds are arranged on a cylindrical circumference inside the cylinder formed by the set of radiating guides so that each feed lights a part of the array of couplers, the microwave feeds being activated in turn. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A cylindrical electronically scanned antenna, comprising:
-
a set of radiating guides arranged in cylinder form to produce an antenna beam; an array of 3 dB couplers in waveguide form having inputs and an outputs, the inputs of which are lit by a set of microwave feeds, the outputs of each coupler being coupled to the input of a radiating guide; an array of pairs of phase-shifting cells, each coupled to a 3 dB coupler, an incoming wave (E) from the microwave feeds being phase-shifted by a controllable phase shift (Δ
φ
), the angular offset of the antenna beam being dependent on the phase shift (Δ
φ
),wherein the microwave feeds are horns linked to a microwave line switching device, each horn supplied by a line. - View Dependent Claims (11)
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Specification