Base station antenna and a reflector for the base station antenna
A reflector for a base station antenna comprises: a body; and at least one slot provided in the body, where the at least one slot is configured for forming at least one stub-type filtering structure in the body. The stub-type filtering structure is configured for at least partially inhibiting an induced current in the body within an operating frequency band of a radiating element mounted behind the reflector.
1 . A reflector for a base station antenna, wherein the reflector comprises:
a body; and
at least one slot provided in the body, wherein the at least one slot is configured to form at least one stub filtering structure in the body, and the stub filtering structure is configured to at least partially inhibit an induced current in the body within an operating frequency band of a radiating element mounted behind the reflector.
2 . The reflector for the base station antenna according to claim 1 , wherein the at least one stub filtering structure includes at least one open stub.
3 . The reflector for the base station antenna according to claim 2 , wherein the longitudinal length of the at least one open stub is 0.25+n/2 times the equivalent wavelength, n being a natural number, wherein the equivalent wavelength is a wavelength at a predetermined frequency point within the operating frequency band.
4 . The reflector for the base station antenna according to claim 2 , wherein the at least one slot includes an H-, L-, M-, U-, S-shaped or scalloped slot for forming the at least one open stub.
5 . The reflector for the base station antenna according to claim 1 , wherein the at least one stub filtering structure includes at least one closed stub.
6 . The reflector for the base station antenna according to claim 5 , wherein the longitudinal length of the at least one closed stub is N/2 times the equivalent wavelength, and N is a positive integer, wherein the equivalent wavelength is the wavelength at a predetermined frequency point within the operating frequency band.
7 . The reflector for the base station antenna according to claim 5 , wherein the at least one slot comprises two slots for forming a single closed stub between the two slots.
8 . The reflector for the base station antenna according to claim 1 , wherein the at least one stub filtering structure comprises multiple stub filtering structures arranged acyclically in at least one direction, and the multiple stub filtering structures include at least one open stub and at least one closed stub.
9 . The reflector for the base station antenna according to claim 1 , wherein the at least one stub filtering structure comprises:
a first stub filtering structure configured to at least partially inhibit a first induced current within a predetermined first frequency band; and
a second stub filtering structure configured to at least partially inhibit a second induced current within a predetermined second frequency band;
wherein the first frequency band is the operating frequency band and is different from the second frequency band.
10 . The reflector for the base station antenna according to claim 1 , wherein the body includes a reflective strip section extending in a vertical direction, wherein the reflective strip section is configured for mounting a radiating element, and the at least one slot is at least partially provided on the reflective strip section for forming at least one of the stub filtering structures on the reflective strip section.
11 . The reflector for the base station antenna according to claim 10 , wherein the body includes a first reflective strip section and a second reflective strip section at the side in a horizontal direction, and an opening is provided between the first reflective strip section and the second reflective strip section.
12 . The reflector for the base station antenna according to claim 1 , wherein the reflector includes a fence extending in a vertical direction, and the fence extends forwardly from the body of the reflector, wherein the at least one additional slot is provided on the fence, wherein the at least one additional slot is configured to form at least one additional stub filtering structure in the fence, and the at least one additional stub filtering structure is configured to at least partially inhibit the induced current within the predetermined frequency band in the fence.
13 . A base station antenna, wherein the base station antenna comprises the reflector for the base station antenna according to claim 1 , wherein the base station antenna includes a passive module and an active module mounted behind the passive module, wherein a reflector and a reflection compensation plate separated from the reflector are mounted inside the passive module, and the reflection compensation plate includes a frequency-selective surface composed of multiple pattern units arranged periodically.
14 . The base station antenna according to claim 13 , wherein the frequency-selective surface is configured to reflect electromagnetic waves within a second frequency band and allow electromagnetic waves within a first frequency band to pass through, wherein the first frequency band corresponds to an operating frequency band of at least a portion of the radiating element inside the passive module and the second frequency band corresponds to the operating frequency band.
15 . The base station antenna according to claim 13 , wherein the reflector includes a first reflective strip section and a second reflective strip section for mounting radiating elements, and that an opening is provided between the first reflective strip section and the second reflective strip section, wherein, the reflection compensation plate is mounted behind the reflector and at least partially overlaps the opening in the projection in the forward direction.
16 . A reflector for a base station antenna that comprises a first array of radiating elements and a second array of radiating elements, the reflector comprising:
a body having an opening therein, the body including a first reflective strip and a second reflective strip on opposed sides of the opening;
a first slot provided in the first reflective strip that defines a first stub and a second slot provided in the second reflective strip that defines a second stub, wherein the first stub has a first longitudinal length that is 0.25 times a first wavelength that corresponds to a first frequency within an operating frequency band of the second array of radiating elements and the second stub has a second longitudinal length that is 0.25 times a second wavelength that corresponds to a second frequency within the operating frequency band of the second array of radiating elements.
17 . The reflector according to claim 16 , wherein the base station antenna comprises an integrated base station antenna that includes a passive module and an active module, and the reflector and the first array of radiating elements are part of the passive module and the second array of radiating elements is part of the active module.
18 . The reflector according to claim 17 , wherein the active module is mounted rearwardly of the opening in the body of the reflector.
19 . The reflector according to claim 16 , wherein the first slot is configured to form at a first stub filtering structure that is configured to at least partially inhibit an induced current in the body within an operating frequency band of the second array of radiating elements.
20 . A reflector for a base station antenna, the reflector comprising:
a body;
a first stub filtering structure that includes at least one first slot in the body and a second stub filtering structure that includes at least one second slot in the body, wherein the first stub filtering structure is configured to at least partially inhibit a first induced current within a first frequency band and the second stub filtering structure is configured to at least partially inhibit a second induced current within a second frequency band that is different than the first frequency band.