Chiun Mai Communication Systems, Inc.

Shu-Wei Jhang

Tun-Yuan Tsou

Jia-Hung Hsiao

Chang-Ching Huang

Yi-Te Chou

Yi-Ting Chen

Tze-Hsuan Chang

Ming-Yu Chou

Yen-Jung Tseng

Kuo-Lun Huang

Wen-Chang Hsu

Chia-Ming Liang

Cheng-An Chen

Jung-Sheng Chih

Yung-Chin Chen

Chang-Je Chen

Wen-Yuan Chen

Chang-Hsin Ou

Chia-hung Su

Lung-ta Chang

An antenna structure of few components and reduced size which functions by switching between components to achieve radiation in three different frequency bands includes two radiating portions, a feeding portion, a matching circuit, and a first switching circuit. With the first switching circuit closed, current flows along a first radiating portion to activate a first frequency band. A second radiating portion obtains the current from the first switching circuit by coupling with the first radiating portion, to activate a second frequency band. Current in the first radiating portion can activate a third frequency band. With the first switching circuit open, current in the first radiating portion activates radiation in the first frequency band. The second radiating portion can radiate in second frequency band by coupling current from the first radiating portion. Frequency multiplication of the first frequency band can activate the third frequency band.

Antenna structure and wireless communication device using the same

An antenna structure includes a housing, a feed portion, a ground portion, a first radiator, and a second radiator. The housing includes a first radiating portion and a second radiating portion. The first radiator and the second radiator are both positioned in the housing. When the feed portion feeds current, the current flows through the first radiating portion and is grounded through the ground portion to activate a first operating mode. When the feed portion feeds current, the current is further coupled to the first radiator through the first radiating portion, and the first radiator activates a second operating mode. When the second radiator feeds current, the second radiator activates a third operating mode. When the second radiator feeds current, the current is further coupled to the second radiating portion through the second radiator, and the second radiating portion activates a fourth operating mode.

An antenna structure includes a metal frame. The metal frame includes a first gap, a second gap, a third gap, and a fourth gap to separate a first antenna, a second antenna, a third antenna, and a fourth antenna from the metal frame. The metal frame includes a fifth antenna. The first antenna, the second antenna, the third antenna, and the fourth antenna cooperatively form a first multiple-input multiple-output (MIMO) antenna to provide a 4&#xd7;4 multiple-input multiple-output function in a second frequency band. The first antenna, the second antenna, the third antenna, and the fifth antenna cooperatively form a second MIMO antenna to provide a 4&#xd7;4 multiple-input multiple-output function in a third frequency band. The first antenna and the third antenna cooperatively form a third MIMO antenna to provide a 2&#xd7;2 multiple-input multiple-output function in a first frequency band.

Antenna structure

An antenna structure includes a housing, a first feed source, a ground portion, a radiator, and a second feed source. The housing includes a front frame, a backboard, and a side frame. The side frame defines a slot. The front frame defines a first gap, a second gap, and a groove. A radiating portion and a coupling portion are divided from the housing by the slot, the first gap, the second gap, and the groove. The first feed source is electrically connected to the radiating portion. One end of the ground portion is electrically connected to the radiating portion and another end of the ground portion is grounded. The radiator is coupled with and apart from the coupling portion. The second feed source is electrically connected to the radiator and a current from the second feed source is coupled to the coupling portion through the radiator.

Antenna structure and wireless communication device using same

An antenna structure utilizing metal housing of a wireless communication device as antenna includes first, second, and third metallic members, and a feed portion. A first gap is between the first and second metallic members. A second gap is between the second and third metallic members. The current feed portion is connected to the second metallic member, and current entering the second metallic member flows towards the first gap and the second gap respectively to excite radiation signals in a first frequency band. The first and third metallic members obtain the current by coupling and excite radiation signals in a second and a third frequency bands respectively. Frequencies of the third frequency band are higher than frequencies of the second frequency band, which are higher than the frequencies of the first frequency band. A wireless communication device using the antenna structure is provided.

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Taipei, Taiwan

Shu-Wei Jhang