Eight-band dual-antenna system for mobile terminal
A mobile terminal, dual-antenna technology, applied in the direction of antenna, antenna coupling, antenna array, etc., can solve the problems of low mutual coupling and can not meet high efficiency, and achieve the effect of low mutual coupling and high efficiency
Active Publication Date: 2016-08-17
TSINGHUA UNIV
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Literature ["Decoupled dual-antenna system using crossed neutralization lines for LTE / WWAN smartphone applications", Shang Wang and Zhengwei Du, "IEEE Antennas and Wireless Propagation Letters", Vol. 14, 2015], Literature ["A dual-antenna system for LTE / WWAN / WLAN / WiMAX smartphone applications”, Shang Wang and Zhengwei Du, IEEE Antennas and Wireless Propagation Letters, Vol. 14, 2015] and literature [“A multibanddual-antenna system with a folded fork-shaped ground branch and folded asymmetric U-shapedslots for smartphone applications", Shang Wang and Zhengwei Du, "IEEE Antennas and Wireless Propagation Letters", Volume 14, 2015] respectively proposed three models that can cover LTE700, GSM850, GSM900, DCS, PCS, UMTS, LTE2300 and LTE2500 frequency band eight-band dual-antenna system, although the mutual coupling of these three dual-antenna systems is lower than -10dB, but the efficiency is below 33%, which cannot meet the needs of high efficiency and low mutual coupling
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[0039] The present invention will be further described below in conjunction with drawings and embodiments.
[0040] The present invention proposes an eight-band dual-antenna system that can cover LTE700, GSM850, GSM900, DCS, PCS, UMTS, LTE2300 and LTE2500 frequency bands, has an efficiency higher than 42.6%, and a mutual coupling lower than -10dB.
[0041] Such as figure 1 and figure 2 As shown, it is the plane expansion diagram of the eight-band dual-antenna system for mobile terminals proposed by the present invention, including left antenna unit A, right antenna unit B, two neutralization lines C1 and C2, inverted T-shaped earth branch D, medium Plate E, metal floor F, and five loading inductors L. The left antenna unit A is located at the upper left corner of the dielectric board E, including the left excitation branch a1, the left ground branch a2, the left inductive loading area a3, the first loading inductance L1 and the left feed point a4, and the left ground branch...
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The invention provides an eight-band dual-antenna system for a mobile terminal, and belongs to the field of multi-antenna design of the mobile terminal. The eight-band dual-antenna system is characterized by comprising two antenna units in symmetry at the left side and the right side, two neutral lines, an inverted T-shaped terrestrial branch, a dielectric plate and a metal floor, wherein each antenna unit comprises an excitation branch, a grounding branch, a loading inductor and an inductor loading zone; the excitation branches and the grounding branches are resonated at DCS, PCS, UMTS, LTE2300 and LTE2500 bands; the grounding branches, the loading inductors and the inductor loading zones are resonated at LTE700, GSM850 and GSM900 bands; the antenna units can cover LTE700, GSM850, GSM900, DCS, PCS, UMTS, LTE2300 and LTE2500 bands; the two neutral lines are used for reducing mutual coupling of the two antenna units in the LTE700, GSM850 and GSM900 bands; and the inverted T-shaped terrestrial branch is used for reducing mutual coupling of the two antenna units in the DCS, PCS, UMTS, LTE2300 and LTE2500 bands. The eight-band dual-antenna system for the mobile terminal meets the application requirements of high efficiency and low mutual coupling.
Description
technical field [0001] The invention belongs to the field of mobile terminal multi-antenna design, relates to an eight-band dual-antenna system with high efficiency and low mutual coupling characteristics, and is suitable for realizing multi-input multi-output communication technology on mobile terminals. Background technique [0002] At present, the mobile communication system is in the coexistence period of the second generation (2G), the third generation (3G) and the fourth generation (4G) mobile communication systems. Different mobile communication systems The communication protocols and working frequency bands used are different. For example, the 2G mobile communication system adopts the global mobile communication system (GSM850: 824-894MHz, GSM900: 880-960MHz), digital cellular system (DCS: 1710-1880MHz) and personal communication system (PCS: 1850-1990MHz), 3G mobile communication system adopts universal mobile communication system (UMTS: 1920-2170MHz), 4G mobile com...
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Login to View More IPC IPC(8): H01Q5/10H01Q5/28H01Q1/52H01Q1/38H01Q21/00
CPCH01Q1/38H01Q1/521H01Q5/10H01Q5/28H01Q21/00
Inventor 杜正伟王岩
Owner TSINGHUA UNIV