# US 2017/0288294 A1 · Active base-tracking multi-antenna system and active base-tracking antenna system for vessel and offshore structure

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- Number: US 2017/0288294 A1
- Document ID: US20170288294A1
- Status: Published application
- Kind: A1
- Application number: 15/314,325
- Filed: 2016-10-18
- Published: 2017-10-05
- Earliest claimed: 2015-10-22
- Assignees: Harbormax Co., Ltd
- Applicants: Harbormax Co., Ltd
- Inventors: Hee-wook KANG; Ji-song KIM
- Web page: https://patentgrep.com/patent/US20170288294A1

## CPC

- H01Q 1/24: with receiving set
- B63B 45/04: the devices being intended to indicate the vessel or parts thereof
- H01Q 1/34: Adaptation for use in or on ships, submarines, buoys or torpedoes (for subaqueous use H01Q1/04)
- H01Q 1/42: Housings not intimately mechanically associated with radiating elements, e.g. radome
- H01Q 3/02: using mechanical movement of antenna or antenna system as a whole
- H01Q 3/08: for varying two co-ordinates of the orientation
- H01Q 21/06: Arrays of individually energised antenna units similarly polarised and spaced apart
- H01Q 21/30: Combinations of separate antenna units operating in different wavebands and connected to a common feeder system
- B63B 2017/0072: {Seaway compensators}
- B63B 2201/20: Antenna or mast
- H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72)
- B63B: SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J2/00; floating substructures as supports of dredgers or soil-shifting machines E02F9/06)

## Abstract

An active base-tracking multi-antenna system and an active base-tracking antenna system for a vessel and an offshore structure are provided. The active base-tracking multi-antenna system may include: a fixing shaft fixed to a fixture on a vessel or an offshore structure; a gimbal unit disposed on a top of the fixing shaft and keep positions of a panning motor and antennas; the panning motor disposed on the gimbal unit and simultaneously rotating the antennas in a left-right direction; and the antennas connected to the panning motor. Therefore, it is possible to always keep the antennas in a stable horizontal position and greatly improve communication quality by adjusting the azimuths and vertical angles of the antennas in real time to an optimal state for communication with a base station.

## Claims

### Claim 1

An active base-tracking multi-antenna system for a vessel and an offshore structure, the system comprising:
a fixing shaft fixed to a fixture on a vessel or an offshore structure;
a gimbal unit disposed on a top of the fixing shaft and maintaining positions of a panning motor and a plurality of antennas;
the panning motor disposed on the gimbal unit and simultaneously rotating the antennas in a left-right direction; and
the antennas connected to the panning motor.

### Claim 2 (depends on 1)

The system of claim 1, further comprising a rotary plate fixed to a rotary shaft of the panning motor and supporting the antennas.

### Claim 3 (depends on 1)

The system of claim 1, wherein the gimbal unit keeps the antennas in a stable position in a way of a universal joint using gravity without a specific controlling or actuating unit.

### Claim 4 (depends on 3)

The system of claim 3, wherein the gimbal unit includes:
a fixing bracket fixed to the top of the fixing shaft;
a Y-axial rotation support bracket coupled to an X-axial hinge pin on the fixing bracket to freely rotate in a Y-axial direction; and
an X-axial rotation support bracket coupled to a Y-axial hinge pin on the Y-axial rotation support bracket to freely rotate in an X-axial direction.

### Claim 5 (depends on 1)

The system of claim 1, wherein operation of the gimbal unit is controlled by an antenna control unit (ACU) having various items of control information, including vessel information and base station information.

### Claim 6 (depends on 2)

The system of claim 2, wherein there are four of the antennas, the rotary plate is formed in the shape of a cross and supports the four antennas, and
modern brackets for fixing the antennas are coupled to front, rear, left, and right sides of the rotary plate, respectively.

### Claim 7 (depends on 2)

The system of claim 2, further comprising a tilting motor fixed to a top of the gimbal unit and adjusting vertical angles of the antennas.

### Claim 8 (depends on 7)

The system of claim 7, wherein the panning motor is disposed on the tilting motor and the rotary plate is disposed on the rotary shaft of the panning motor.

### Claim 9 (depends on 7)

The system of claim 7, wherein operation of the tilting motor is controlled by an antenna control unit (ACU) having various items of control information, including vessel information and base station information.

### Claim 10 (depends on 7)

The system of claim 7, wherein the tilting motor is an outer rotor motor having a rotor around an outside of a stator,
a plurality of flanges radially extending outward is formed around an outside of the rotor,
tilting hinge extensions are coupled to joints, which are coupled to the antennas, of the rotary plate to be rotatable up and down,
modern brackets are fixed to the tilting hinge extensions, respectively,
the antennas are fixed to the modern brackets, respectively, and
connection links are disposed between coupling extensions on inner sides of the modern brackets and the flanges of the tilting motor.

### Claim 11

An active base-tracking antenna system for a vessel and an offshore structure, the system comprising:
a protective case fixed to a fixture on a vessel or an offshore structure;
a gimbal unit disposed at an upper portion in the protective case and maintaining a position of an antenna; and
the antenna disposed under the gimbal unit.

### Claim 12 (depends on 11)

The system of claim 11, further comprising a panning motor disposed under the gimbal unit,
wherein the antenna is coupled to the panning motor.

### Claim 13 (depends on 12)

The system of claim 12, wherein a rotary plate is disposed on a rotary shaft of the panning motor and the antenna is fixed to the rotary plate.

### Claim 14 (depends on 11)

The system of claim 11, wherein the gimbal unit keeps the antenna in a stable position by means of a universal joint using gravity without a specific controlling or actuating unit.

### Claim 15 (depends on 14)

The system of claim 14, wherein the gimbal unit includes:
a fixing bracket fixed at the upper portion in the protective case;
a Y-axial rotation support bracket coupled to an X-axial hinge pin of the fixing bracket to freely rotate in a Y-axial direction; and
an X-axial rotation support bracket coupled to a Y-axial hinge pin of the Y-axial rotation support bracket to freely rotate in an X-axial direction.

### Claim 16 (depends on 12)

The system of claim 12, wherein operation of the panning motor is controlled by an antenna control unit (ACU) having various items of control information, including vessel information and base station information.

### Claim 17 (depends on 13)

The system of claim 13, wherein the rotary plate is formed in a straight line shape, and
the antenna is disposed at both ends of a bottom of the rotary plate.

### Claim 18 (depends on 13)

The system of claim 13, wherein the rotary plate is formed in a cross shape, and
the antenna is disposed at front, rear, left, and right sides of a bottom of the rotary plate.

### Claim 19 (depends on 17)

The system of claim 17, wherein the antenna is a directional antenna.