Cavity filter and antenna module including the same

A cavity filter comprising:

• a plate comprising a feeder part supplying an electrical signal;
• a housing forming an exterior of the cavity filter and coupled to the plate, the housing and the plate forming a shielded space inside the cavity filter;
• and
• a metal structure comprising:
• a first end coupled to an inside of the housing, and
• a second end extending toward the feeder part,
• wherein a conductive region is formed on a surface of the plate facing the metal structure to generate a resonance and filter frequencies of a signal, and
• wherein a resonant frequency of the cavity filter is determined based on a spacing between the second end of the metal structure and the feeder part and a length of the metal structure.

An antenna comprising:

• a cavity filter comprising:
• a plate comprising a feeder part supplying an electrical signal,
• a housing forming an exterior of the cavity filter and coupled to the plate, the housing and the plate forming a shielded space inside the cavity filter, and
• a metal structure comprising:
• a first end coupled to an inside of the housing, and
• a second end extending toward the feeder part and resonating to filter the frequencies in the shielded space,
• wherein a resonant frequency of the cavity filter is determined based on a spacing between the second end of the metal structure and the feeder part and a length of the metal structure.

An antenna comprising:

• a cavity filter comprising:
• a plate comprising a feeder part supplying an electrical signal,
• a housing forming an exterior of the cavity filter and coupled to the plate, the housing and the plate forming a shielded space inside the cavity filter, and
• a metal structure comprising:
• a first end coupled to an inside of the housing, and
• a second end extending toward the feeder part,
• wherein a conductive region is formed on a surface of the plate facing the metal structure to generate a resonance and filter frequencies of a signal, and
• wherein a resonant frequency of the cavity filter is determined based on a spacing between the second end of the metal structure and the feeder part and a length of the metal structure.