Mimo antenna structure of wifi terminal

Abstract

The invention discloses an MIMO (Multi-Input Multi-Output) antenna structure of a WIFI (Wireless Fidelity) terminal. The MIMO antenna structure comprises a main body, an earth plate, an MIMO antenna structure body, a sinking structure and a matching circuit module, wherein the earth plate and the MIMO antenna structure body are arranged on the main body; a first gap and a second gap which are symmetric to each other are formed in one end of the earth plate to form a first antenna clearance area and a second antenna clearance area respectively; the MIMO antenna structure body comprises a first antenna radiating body, a first feed part, a second antenna radiating body and a second feed part; an opening groove is formed in the lower end of a strip-shaped lug; the sinking structure is positioned at the opening groove; the matching circuit module is arranged between the first antenna radiating body and the second antenna radiating body; two ends of the matching circuit module are connected with the first antenna radiating body and the second antenna radiating body respectively. According to the MIMO antenna structure, by adopting the design of the sinking structure and the matching circuit module, the floor space is small, the isolating effect is better, and the communication quality of an antenna is higher.

Description

technical field [0001] The present invention relates to the technical field of antennas, in particular to a MIMO antenna structure of a WIFI terminal. Background technique [0002] So far, WIFI (2.4GHz-2.484GHz, 5.2GHz-5.9GHz) terminals have continued to develop, and the 802.11 series has also continued to develop. The antenna in the WIFI terminal has also developed from the early single-input-output antenna to the multi-input-output antenna mode, and the transmission rate has been continuously improved. However, on small-sized terminals such as data cards, due to the limited space, there are great problems in antenna placement. For example, if the structure of placing an antenna in the middle of the bottom antenna is adopted, the actual radiation and receiving capabilities of the two antennas are quite different. There will be adverse effects on data transmission, and the MIMO antenna cannot function. refer to figure 1 and figure 2 , figure 1 For the MIMO antenna stru...

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Problems solved by technology

figure 2 is the impedance characteristic curve of the MIMO antenna in the prior art, from figure 2 It can be seen from the figure that in the initial state, the S11 parameter of the MIMO antenna can meet the requirement of -6dB, but the isolation is very poor and can only reach -6dB

When designing the antenna with a completely symmetrical structure, due to size constraints and layout, the spatial distance of the antenna will be very close, resulting in the problem of unsatisfactory isolation

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