Antenna module

Abstract

An antenna module is suitable for mounting on the fuselage of a drone, the fuselage including a front side, a rear side, and a left side and a right side opposite to each other. The antenna module includes a first antenna, a second antenna, a third antenna, and a fourth antenna. The first antenna is horizontally mounted on the front side of the fuselage and is a horizontally polarized antenna. The second antenna is vertically mounted on the right side of the fuselage and is a vertically polarized antenna. The third antenna is horizontally mounted on the rear side of the fuselage and is a horizontally polarized antenna. The fourth antenna is vertically mounted on the left side of the fuselage and is a vertically polarized antenna. Each of the first, second, third, and fourth antennas operates in a frequency band.

Claims

1. An antenna module adapted to be mounted on a fuselage of a drone, the fuselage including a front side, a rear side, and a left side and a right side opposite to each other, the antenna module comprising: A first antenna is horizontally disposed on the front side of the fuselage, operates in a frequency band, and is a horizontally polarized antenna; A second antenna, vertically positioned on the right side of the fuselage, operates in the frequency band and is a vertically polarized antenna; a third antenna, horizontally positioned on the rear side of the fuselage, operates in the frequency band and is a horizontally polarized antenna; a fourth antenna, vertically positioned on the left side of the fuselage, operates in the frequency band and is a vertically polarized antenna; a circuit board, disposed within the fuselage and connected to the first, second, third, and fourth antennas. The circuit board includes a first short side, a second short side, a first long side, and a second long side. The first antenna includes a first feed terminal connected to the first short side near the second long side. The second antenna includes a second feed terminal connected to the first long side near the first short side. The third antenna includes a third feed terminal connected to the second short side near the first long side. The fourth antenna includes a fourth feed terminal connected to the second long side near the second short side. The first antenna includes a first segment extending from the first feed end along the second long side and a second segment perpendicularly connected to the first segment, with the second segment extending towards the first long side. The second antenna includes a third segment extending from the second feed end and a fourth segment perpendicularly connected to the third segment, with the third segment extending along a normal direction of the circuit board and the fourth segment extending towards the second short side. The third antenna includes a fifth segment extending from the third feed end along the first long side and a sixth segment bent and connected to the fifth segment, with the sixth segment extending towards the second long side. The fourth antenna includes a seventh segment extending from the fourth feed end and an eighth segment bent and connected to the seventh segment, with the seventh segment extending along the normal direction of the circuit board and the eighth segment extending towards the first short side.

2. The antenna module as claimed in claim 1, wherein the length of each of the first antenna, the second antenna, the third antenna, and the fourth antenna is between 0.2 and 0.3 times the wavelength of the frequency band.

3. The antenna module as claimed in claim 1, wherein each of the first antenna, the second antenna, the third antenna, and the fourth antenna is L-shaped.

4. The antenna module as claimed in claim 1, wherein the distance between the second antenna and the first short side is between 0.09 and 0.1 times the wavelength of the frequency band, and the distance between the fourth antenna and the second short side is between 0.09 and 0.1 times the wavelength of the frequency band.

5. The antenna module as claimed in claim 1, wherein the circuit board includes a switching circuit that can be electrically connected to one of the first antenna, the second antenna, the third antenna, and the fourth antenna.

6. The antenna module as claimed in claim 1, wherein the first antenna and the third antenna are coplanar with the circuit board, and the fourth segment of the second antenna and the eighth segment of the fourth antenna are parallel to the circuit board.

7. The antenna module as claimed in claim 1, wherein the frequency band is between 863MHz and 928MHz.

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