Base station antenna, feeder component and frame component
Base station antennas, and components for base station antennas, such as reflectors, feeder components, frames, and column components. A base station antenna may include a reflector; a first radiator located at the front side of the reflector; mutually parallel first and second ground plates extending backward from the reflector and basically perpendicular to the reflector; and a first conductor strip extending between the first and second ground plates and configured to feed power to the first radiator. The first conductor strip and the first and second ground plates may be configured as a first stripline transmission line. The reflector and the first and second ground plates may be configured as one piece so that the reflector is grounded via the first and second ground plates without soldering.
1. A base station antenna, comprising:
a reflector;
a first radiator located forward of a front surface of the reflector;
mutually parallel first and second ground plates extending backward from a rear surface of the reflector and substantially perpendicular to the reflector;
a first conductor strip extending between the first and second ground plates and configured to feed power to the first radiator, wherein the first conductor strip and the first and second ground plates are configured as a first stripline transmission line; and
a transition piece configured to connect a coaxial transmission line feeding the base station antenna to the first stripline transmission line,
wherein the reflector and the first and second ground plates are configured as one piece such that the reflector is grounded via the first and second ground plates without soldering.
2. The base station antenna according to claim 1 , further comprising:
a printed circuit board located between the reflector and the first radiator, wherein a front surface of the printed circuit board is printed with conductor traces configured to feed the first radiator, wherein a rear surface of the printed circuit board is printed with a conductor plane, and wherein the first conductor strip is electrically connected to the conductor traces and the conductor plane is grounded by being electrically coupled to the reflector.
3. The base station antenna according to claim 2 , wherein the first conductor strip has a projecting part that extends and passes through the reflector and the printed circuit board in front of the reflector, and wherein the projecting part is soldered to at least one conductor trace.
4. The base station antenna according to claim 1 , further comprising:
a printed circuit board located between the reflector and the first radiator, wherein a front surface of the printed circuit board is printed with conductor traces configured to feed the first radiator, wherein the first conductor strip is electrically connected to the conductor traces, and wherein a rear surface of the printed circuit board abuts against the front surface of the reflector, such that the reflector is as a ground plane for the conductor traces.
5. The base station antenna according to claim 1 , further comprising:
a second radiator located forward of the front surface of the reflector, wherein the first and second radiators are configured to transmit and receive radio frequency signals along first and second polarization directions, respectively;
mutually parallel third and fourth ground plates extending backward from the rear surface of the reflector and substantially perpendicular to the reflector; and
a second conductor strip extending between the third and fourth ground plates and configured to feed the second radiator,
wherein the second conductor strip and the third and fourth ground plates constitute a second stripline transmission line laterally adjacent to the first stripline transmission line,
wherein the reflector and the first to fourth ground plates are constructed as one piece such that the reflector is grounded via the first to fourth ground plates without soldering, and
wherein the second and fourth ground plates are configured as the same ground plate.
6. The base station antenna according to claim 1 , wherein the coaxial transmission line comprises an inner conductor and an outer conductor, and the transition piece comprises a first transition piece and a second transition piece, and wherein the inner conductor is electrically connected to the first conductor strip via the first transition piece and the outer conductor is electrically coupled to the first and second ground plates via the second transition piece.
7. A base station antenna, comprising:
a reflector;
a first radiator located forward from a front surface of the reflector;
a first cavity element located rearward from a rear surface of the reflector, wherein the first cavity element comprises first and second ground plates that are parallel to each other and extend backward from the rear surface of the reflector substantially perpendicular to the rear surface of the reflector, each of the first and second ground plates having a first edge part proximate to the reflector;
a first conductor strip extending between the first and second ground plates and configured to feed the first radiator, wherein the first conductor strip and the first and second ground plates constitute a first stripline transmission line; and
a first dielectric layer located between the first edge parts of the first and second ground plates and the reflector,
wherein the first edge part of the first ground plate extends laterally away from the first conductor strip to form a first coupling part which is substantially parallel to the rear surface of the reflector,
wherein the first edge part of the second ground plate extends laterally away from the first conductor strip to form a second coupling part which is substantially parallel to the rear surface of the reflector, and
wherein the first and second coupling parts are respectively electrically coupled to the reflector via the first dielectric layer such that the reflector is grounded via the first cavity element without a soldering connection therebetween.
8. The base station antenna according to claim 7 , further comprising:
a printed circuit board located between the reflector and the first radiator, wherein a front surface of the printed circuit board is printed with conductor traces configured to feed the first radiator, wherein a rear surface of the printed circuit board is printed with a conductor plane, and wherein the first conductor strip is electrically connected to the conductor traces and the conductor plane is grounded by being electrically coupled to the reflector.
9. The base station antenna according to claim 8 , further comprising a pin configured to electrically connect the first cavity element to the conductor plane such that the first cavity element, the conductor plane, and the reflector are grounded in common.
10. The base station antenna according to claim 9 , wherein the second coupling part, the reflector, and the printed circuit board respectively comprise first to third position-corresponding openings, wherein the pin passes through the first to third openings in sequence, wherein the pin is electrically connected to the second coupling part through a pressure riveting process and to the conductor traces printed on the front surface of the printed circuit board by a soldering connection, and wherein the pin is electrically disconnected from the reflector.
11. The base station antenna according to claim 7 , further comprising:
a printed circuit board located between the reflector and the first radiator, wherein a front surface of the printed circuit board is printed with conductor traces configured to feed the first radiator, wherein the first conductor strip is electrically connected to the conductor traces, and wherein a rear surface of the printed circuit board abuts against the front surface of the reflector, such that the reflector is a ground plane for the conductor traces.
12. A base station antenna, comprising:
a plurality of reflectors extending in a longitudinal direction of the base station antenna; and
a plurality of linear arrays extending in the longitudinal direction of the base station antenna, each linear array including a plurality of radiating elements mounted to a corresponding reflector so as to extend forwardly from the corresponding reflector, wherein,
the plurality of reflectors are fixedly positioned such that the plurality of reflectors are separated from each other and each linear array has the same azimuth-angle visual-axis pointing direction.
13. The base station antenna according to claim 12 , wherein the plurality of reflectors are fixedly positioned such that a substantially flat forward surface of a first reflector in the plurality of reflectors and a substantially flat forward surface of a second reflector in the plurality of reflectors other than the first reflector are basically coplanar.
14. The base station antenna according to claim 13 , further comprising:
a metal plate having first and second edge parts,
wherein the first edge part of the metal plate overlaps an edge part of the first reflector adjacent to the second reflector to form a first capacitive coupling connection, and
wherein the second edge part of the metal plate overlaps an edge part of the second reflector adjacent to the first reflector to form a second capacitive coupling connection.
15. The base station antenna according to claim 12 , wherein the plurality of reflectors are fixedly positioned such that an edge part of a first reflector in the plurality of reflectors adjacent to a second reflector and an edge part of the second reflector adjacent to the first reflector overlap to form a capacitive coupling connection between the first and second reflectors.
16. The base station antenna according to claim 15 , further comprising:
a metal element, which has a first part extending parallel to a substantially flat forward surface of a third reflector of the plurality of reflectors, and a second part extending from the first part to a front of the base station antenna, the third reflector being located at a lateral edge part of the base station antenna,
wherein the edge part of the first part and the edge part of a forward surface of the third reflector overlap to form a capacitive coupling connection, so that the metal element and the third reflector are commonly grounded, and the second part is configured to adjust a radiation pattern of the base station antenna.
17. A base station antenna, comprising:
a frame; and
a plurality of sub-reflectors coupled to the frame and extending in a longitudinal direction of the base station antenna, the plurality of sub-reflectors sharing an azimuth-angle visual-axis pointing direction, each of the plurality of sub-reflectors having at least one radiating element mounted forwardly of a front surface of the sub-reflector,
wherein each of the plurality of sub-reflectors is fixedly positioned on the frame such that the plurality of sub-reflectors are separated from each other, and
wherein the plurality of sub-reflectors are commonly grounded.
18. The base station antenna of claim 17 , wherein the sub-reflectors are fixedly positioned such that a forward surface of a first sub-reflector of the plurality of sub-reflectors is coplanar with a forward surface of a second sub-reflector of the plurality of sub-reflectors that is adjacent to the first sub-reflector.