Low-frequency oscillator unit and antenna
The embodiments of the present disclosure disclose a low-frequency oscillator unit and an antenna. The low-frequency oscillator unit comprises multiple oscillator arms extending outward along the central axis of the low-frequency oscillator unit and spaced apart from each other. The oscillator arm include a dielectric substrate and a conductive layer provided on the dielectric substrate. The conductive layer includes multiple spiral shaped first conductor parts and multiple second conductor parts arranged along the extension direction of the oscillator arm. Adjacent first conductor parts are connected by two spaced second conductor parts, and adjacent first conductor parts are symmetrically arranged. Therefore, the oscillator arm of the low-frequency oscillator unit may eliminate the coupling caused by the low-frequency oscillator unit and the influence between different frequency band oscillator units in the multi frequency antenna through the first conductor parts with multiple sequentially connected spiral shapes.
1 . A low-frequency oscillator unit, wherein the low-frequency oscillator unit comprises a plurality of oscillator arms extending outwardly along the central axis of the low-frequency oscillator unit and spaced apart from each other, each oscillator arm comprises a dielectric substrate and a conductive layer arranged on the dielectric substrate, the conductive layer comprises a plurality of spiral-shaped first conductor parts and a plurality of second conductor parts arranged along the extending direction of the oscillator arm, adjacent first conductor parts of the plurality of spiral-shaped first conductor parts are connected by two second conductor parts of the plurality of second conductor parts that are spaced apart from each other, and the two adjacent first conductor parts are symmetrically arranged.
2 . The low-frequency oscillator unit according to claim 1 , wherein each first conductor part of the plurality of spiral-shaped first conductor parts comprises a first branch, a second branch and a third branch that are arranged coaxially in a sequential manner from inside to outside, and the first branch, the second branch and the third branch each have a first opening, a second opening and a third opening arranged on the same side, respectively; a first end of the first opening is connected to a second end of the second opening through a fourth branch, a first end of the second opening is connected to a second end of the third opening through a fifth branch, the fourth branch and the fifth branch are spaced apart.
3 . The low-frequency oscillator unit according to claim 2 , wherein the oscillator arm comprises three spiral-shaped first conductor parts, and two adjacent first conductor parts on the outer side are connected by two conductor parts of the plurality of second conductor parts that are spaced apart from each other to form a closed structure, and the two second conductor parts between the two adjacent first conductor parts are located outside two ends of the third opening.
4 . The low-frequency oscillator unit according to claim 2 , wherein the first conductor part is in a square spiral shape, the first branch is in a square structure, the second branch and the third branch are in a square ring structure.
5 . The low-frequency oscillator unit according to claim 4 , wherein a circumference of the first branch is one-fourth of a wavelength at the center frequency of the operating band of a high-frequency oscillator unit, a circumference of the second branch is one-third of the wavelength at the center frequency of the operating band of the high-frequency oscillator unit, and a circumference of the third branch is one-half of the wavelength at the center frequency of the operating band of the high-frequency oscillator unit,
wherein the high-frequency oscillator unit and the low-frequency oscillator unit are arrayed to form an antenna.
6 . The low-frequency oscillator unit according to claim 5 , wherein the oscillator arm comprises three spiral-shaped first conductor parts, and two adjacent first conductor parts on the outer side are connected by the two conductor parts of the plurality of second conductor parts that are spaced apart from each other to form a closed structure, and the two second conductor parts between the two adjacent first conductor parts are located outside two ends of the third opening.
7 . The low-frequency oscillator unit according to claim 2 , wherein the first conductor part is in a circular spiral shape, the first branch is in a circular structure, the second branch and the third branch are in a circular ring structure.
8 . The low-frequency oscillator unit according to claim 7 , wherein the circumference of the first branch is one third of a wavelength at the center frequency of the operating band of a high-frequency oscillator unit, the circumference of the second branch is one half of the wavelength at the center frequency of the operating band of the high-frequency oscillator unit, and the length of the third branch is two thirds of the wavelength at the center frequency of the operating band of the high-frequency oscillator unit,
wherein the high-frequency oscillator unit and the low-frequency oscillator unit are arrayed to form an antenna.
9 . The low-frequency oscillator unit according to claim 8 , wherein the oscillator arm comprises three spiral-shaped first conductor parts, and two adjacent first conductor parts on the outer side are connected by two conductor parts of the plurality of second conductor parts that are spaced apart from each other to form a closed structure, and the two second conductor parts between the two adjacent first conductor parts are located outside two ends of the third opening.
10 . The low-frequency oscillator unit according to claim 1 , wherein the low-frequency oscillator unit further comprises a guiding piece having guiding arms equal in number to the oscillator arms, the extension direction of the guiding arms corresponding to the extension direction of the oscillator arms, the guiding arms being disposed above the corresponding oscillator arms, and a predetermined interval being provided between the guiding arms and the oscillator arms.
11 . The low-frequency oscillator unit according to claim 10 , wherein the low-frequency oscillator unit further comprises:
a feeding plate, the feeding plate being provided with feeding lines and interfaces electrically connected to an external coaxial cable; and
a balun assembly connected to the feeding plate, the balun assembly comprising a plurality of baluns, each of the baluns having two oscillator arms fixed on both sides, and the baluns being electrically connected to the feeding lines and the corresponding oscillator arms.
12 . The low-frequency oscillator unit according to claim 11 , wherein the low-frequency oscillator unit further comprises a guiding plate supporting the guiding piece, the guiding plate has a shape matching the guiding piece, and a connecting plate extends upward from the top of the balun, the guiding plate is fixedly connected to the connecting plate, so that there is a predetermined interval between the guiding piece and the oscillator arms.
13 . The low-frequency oscillator unit according to claim 10 , wherein the low-frequency oscillator unit has four oscillator arms arranged orthogonally to each other, and the oscillator arms are arranged perpendicular to the guiding piece.
14 . The low-frequency oscillator unit according to claim 13 , wherein the guiding piece has four guide arms arranged orthogonally to each other, making the guiding piece form a cross shape, and the guiding piece has a cross-shaped hollow pattern.
15 . The low-frequency oscillator unit according to claim 14 , wherein the low-frequency oscillator unit further comprises:
a feeding plate, the feeding plate being provided with feeding lines and interfaces electrically connected to an external coaxial cable; and
a balun assembly connected to the feeding plate, the balun assembly comprising a plurality of baluns, each of the baluns having two oscillator arms fixed on both sides, and the baluns being electrically connected to the feeding lines and the corresponding oscillator arms.
16 . The low-frequency oscillator unit according to claim 15 , wherein the low-frequency oscillator unit further comprises a guiding plate supporting the guiding piece, the guiding plate has a shape matching the guiding piece, and a connecting plate extends upward from the top of the balun, the guiding plate is fixedly connected to the connecting plate, so that there is a predetermined interval between the guiding piece and the oscillator arms.
17 . An antenna, comprises at least two low-frequency oscillator units of claim 1 , and the low-frequency oscillator units are arranged in an array.
18 . The antenna according to claim 17 , wherein the first conductor part comprises a first branch, a second branch and a third branch that are arranged coaxially in a sequential manner from inside to outside, and the first branch, the second branch and the third branch each have a first opening, a second opening and a third opening arranged on the same side, respectively; the first end of the first opening is connected to the second end of the second opening through a fourth branch, the first end of the second opening is connected to the second end of the third opening through a fifth branch, the fourth branch and the fifth branch are arranged at intervals.
19 . The antenna according to claim 17 , wherein the low-frequency oscillator unit further comprises a guiding piece having guiding arms equal in number to the oscillator arms, the extension direction of the guiding arms corresponding to the extension direction of the oscillator arms, the guiding arms being disposed above the corresponding oscillator arms, and a predetermined interval being provided between the guiding arms and the oscillator arms.
20 . The antenna according to claim 19 , wherein the low-frequency oscillator unit further comprises:
a feeding plate, the feeding plate being provided with feeding lines and interfaces electrically connected to an external coaxial cable; and
a balun assembly connected to the feeding plate, the balun assembly comprising a plurality of baluns, each of the baluns having two oscillator arms fixed on both sides, and the baluns being electrically connected to the feeding lines and the corresponding oscillator arms.