Filter, phase shifter, and related apparatus

A phase shifter, comprising a filter, wherein the filter comprises:

• a cavity, a circuit board, and a filter branch;
• the circuit board is located in the cavity;
• a power divider circuit is disposed on the circuit board, and the power divider circuit comprises an input end, a main feeder, and an output end, wherein both the input end and the output end are electrically connected to the main feeder, and the main feeder is configured to transmit a signal that is input at the input end and is output at the output end;
• the filter branch comprises a first interface and a first filter line, wherein the first interface is disposed at an opening of the cavity, the first filter line is located outside the cavity, the first filter line is electrically connected to the first interface, and the first interface is electrically connected to the main feeder;
• wherein the phase shifter further comprises a phase shift unit;
• the phase shift unit is located in the cavity, and the phase shift unit moves relative to the circuit board;
• wherein the first filter line is electrically connected to the first interface in a screwing mode;
• and
• wherein the first filter line is in an open-circuit state in which one end of the first filter line is connected to the first interface and an other end of the first filter line is not connected to any circuit, and wherein a length of the first filter line is adjustable outside the cavity to adjust a wavelength range of an electromagnetic wave filtered out by the filter branch.

An antenna comprising:

• an antenna unit, configured to radiate an electromagnetic beam, and a phase shifter that is connected to the antenna unit;
• wherein
• the phase shifter comprises a filter, wherein the filter comprises:
• a cavity, a circuit board, and a filter branch;
• the circuit board is located in the cavity;
• a power divider circuit is disposed on the circuit board, and the power divider circuit comprises an input end, a main feeder, and an output end, wherein both the input end and the output end are electrically connected to the main feeder, and the main feeder is configured to transmit a signal that is input at the input end and is output at the output end;
• the filter branch comprises a first interface and a first filter line, wherein the first interface is disposed at an opening of the cavity, the first filter line is located outside the cavity, the first filter line is electrically connected to the first interface, and the first interface is electrically connected to the main feeder;
• wherein the phase shifter further comprises a phase shift unit;
• the phase shift unit is located in the cavity, and the phase shift unit can move relative to the circuit board;
• wherein the first filter line is electrically connected to the first interface in a screwing mode;
• and
• wherein the first filter line is in an open-circuit state in which one end of the first filter line is connected to the first interface and an other end of the first filter line is not connected to any circuit, and wherein a length of the first filter line is adjustable outside the cavity to adjust a wavelength range of an electromagnetic wave filtered out by the filter branch.

A base station device, comprising an antenna, wherein the antenna comprises:

• an antenna unit, configured to radiate an electromagnetic beam,
• a phase shifter that is connected to the antenna unit;
• wherein
• the phase shifter comprises a filter, wherein the filter comprises:
• a cavity, a circuit board, and a filter branch;
• the circuit board is located in the cavity;
• a power divider circuit is disposed on the circuit board, and the power divider circuit comprises an input end, a main feeder, and an output end, wherein both the input end and the output end are electrically connected to the main feeder, and the main feeder is configured to transmit a signal that is input at the input end and is output at the output end;
• the filter branch comprises a first interface and a first filter line, wherein the first interface is disposed at an opening of the cavity, the first filter line is located outside the cavity, the first filter line is electrically connected to the first interface, and the first interface is electrically connected to the main feeder;
• wherein the phase shifter further comprises a phase shift unit;
• the phase shift unit is located in the cavity, and the phase shift unit moves relative to the circuit board;
• wherein the first filter line is electrically connected to the first interface in a screwing mode;
• and
• wherein the first filter line is in an open-circuit state in which one end of the first filter line is connected to the first interface and an other end of the first filter line is not connected to any circuit, and wherein a length of the first filter line is adjustable outside the cavity to adjust a wavelength range of an electromagnetic wave filtered out by the filter branch.