Open loop antenna and electronic device

An open loop antenna comprising:

• a base being an irregular three dimensional structure with a plurality of surfaces;
• a first radiating section disposed on some of the surfaces of the base and comprising:
• a feeding segment, wherein one end of the feeding segment is connected to a feeding point;
• an extending segment connected to another end of the feeding segment, wherein the extending segment generates a first frequency band when being excited;
• and
• a high-frequency coupling segment connected to the extending segment, wherein the high-frequency coupling segment generates a second frequency band when being excited;
• a second radiating section disposed on some of the surfaces of the base and spaced apart from the first radiating section to form an open loop, wherein the second radiating section is coupled with the first radiating section to generate a third frequency band;
• and
• a grounding section disposed on the base and spaced apart from the first radiating section, wherein the grounding section is connected to the second radiating section and a ground voltage;
• a shielding member being a metal frame formed in correspondence to some of the surfaces of the base, coupled to the ground voltage and covering some of the surfaces of the base, wherein the shielding member surrounds the first radiating section and the second radiating section to provide electromagnetic shielding for the first radiating section and the second radiating section;
• wherein the first frequency band is higher than the second frequency band, and the second frequency band is higher than the third frequency band;
• wherein a coupling gap is formed between the first radiating section and the second radiating section, and a total length of the first radiating section, the coupling gap and the second radiating section is one half of a wavelength of the third frequency band.

An electronic device comprising:

• a housing;
• an open loop antenna disposed in the housing and comprising:
• a base being an irregular three dimensional structure with a plurality of surfaces;
• a first radiating section disposed on some of the surfaces of the base and comprising:
• a feeding segment, wherein one end of the feeding segment is connected to a feeding point;
• an extending segment connected to another end of the feeding segment, wherein the extending segment generates a first frequency band when being excited;
• and
• a high-frequency coupling segment connected to the extending segment, wherein the high-frequency coupling segment generates a second frequency band when being excited;
• a second radiating section disposed on some of the surfaces of the base and spaced apart from the first radiating section to form an open loop, wherein the second radiating section is coupled with the first radiating section to generate a third frequency band, the first frequency band is higher than the second frequency band, the second frequency band is higher than the third frequency band, a coupling gap is formed between the first radiating section and the second radiating section, and a total length of the first radiating section, the coupling gap and the second radiating section is one half of a wavelength of the third frequency band;
• a grounding section disposed on the base and spaced apart from the first radiating section, wherein the grounding section is connected to the second radiating section and a ground voltage;
• a coaxial cable disposed on the base and comprising:
• a central conductive line coupled to the feeding point;
• and
• a conductive housing coupled to a grounding point of the ground voltage;
• and
• a shielding member being a metal frame formed in correspondence to some of the surfaces of the base, coupled to the ground voltage and covering some of the surfaces of the base, wherein the shielding member surrounds the first radiating section and the second radiating section to provide electromagnetic shielding for the first radiating section and the second radiating section;
• and
• at least one electronic module disposed in the housing and around the open loop antenna.