阅读说明：本技术 一种4g-mimo智能眼镜天线 (4G-MIMO intelligent glasses antenna ) 是由 王艳艳 班永灵 公晓庆 赵星影 王冰 李肖飞 于 2019-08-29 设计创作，主要内容包括：本发明涉及可穿戴天线技术领域,具体涉及一种4G-MIMO智能眼镜天线；本发明将环天线印刷在眼镜框上,并且根据眼镜的对称性能,形成MIMO天线结构；同时,金属环的底边设置一个断点缝隙,将环结构分成两个部分,其中从微带馈线的的馈电端口到断点缝隙之间形成单极子天线产生一个1/4λ的单极子模式,加上环天线的基模,共同覆盖4G的低频段824-960MHz；另外,在眼镜框介质基板和眼镜腿介质基板的连接处设置一个寄生枝节,其在2.6GHz产生的偶极子模式和环的两个高阶模式共同覆盖4G的高频段1710-2690MHz；进而覆盖4G的高低频段,形成4G-MIMO智能眼镜天线。(The invention relates to the technical field of wearable antennas, in particular to a 4G-MIMO intelligent glasses antenna; the loop antenna is printed on the glasses frame, and an MIMO antenna structure is formed according to the symmetry performance of the glasses; meanwhile, a breakpoint gap is arranged at the bottom edge of the metal ring, the ring structure is divided into two parts, wherein a monopole mode of 1/4 lambda is generated by forming a monopole antenna from a feed port of the microstrip feed line to the breakpoint gap, and the monopole mode and the fundamental mode of the ring antenna jointly cover the low-frequency band of 4G, namely 824-960 MHz; in addition, a parasitic branch is arranged at the joint of the spectacle frame dielectric substrate and the spectacle leg dielectric substrate, and a dipole mode generated at 2.6GHz and two high-order modes of a ring cover the 4G high-frequency segment 1710-2690MHz together; and further covering the 4G high-low frequency band to form a 4G-MIMO intelligent glasses antenna.)

1. The utility model provides a 4G-MIMO smart glasses antenna, the antenna is bilateral symmetry structure, includes: the glasses frame comprises a glasses frame dielectric substrate (1), a glasses leg dielectric substrate (2) vertically connected with the glasses frame dielectric substrate (1), a metal ring (3) arranged on the front surface of the glasses frame dielectric substrate (1), a metal floor (4) arranged on the outer side of the glasses leg dielectric substrate (2), a microstrip feeder line (5), a grounding short-circuit line (6), a parasitic branch (7) and a lumped capacitor (9); the glasses frame is characterized in that the metal ring is an open metal ring, and the open position of the metal ring is over against the connection part of the glasses frame medium substrate and the glasses leg medium substrate; the upper opening end of the opening metal ring is connected with the metal floor through a microstrip feeder, the joint of the microstrip feeder and the metal floor is used as a feed port, and the lower opening end of the opening metal ring is connected with the metal floor through a grounding short circuit line; a breakpoint gap is further arranged on the metal ring, the length between the breakpoint gap and the feed port is 1/4 lambda, and lambda is the working wavelength; the lumped capacitor is arranged on the metal ring and is positioned at one end, close to the microstrip feeder line, of the metal ring; the parasitic branch is arranged at the joint of the spectacle frame dielectric substrate and the spectacle leg dielectric substrate and is positioned below the grounding short circuit line, one end of the parasitic branch is connected with the metal floor, and the other end of the parasitic branch extends to the front side of the spectacle frame dielectric substrate.

2. The 4G-MIMO smart eyewear antenna of claim 1 wherein said metal loop has a width of 2mm and said break point gap has a length of 2 mm.

3. A 4G-MIMO smart eyewear antenna as claimed in claim 1 wherein said microstrip feed line comprises a 50 ohm rf line.

Technical Field

The invention relates to the technical field of wearable antennas, in particular to a 4G-MIMO intelligent glasses antenna.

Background

With the rapid development of wireless communication, modern communication equipment is not limited to smart phones, computers and other equipment, and wearable equipment has a greater proportion in mobile communication; it has become one of the high technologies that are growing rapidly worldwide and is one of the hot spots for present and future research. The wearable device is portable intelligent electronic equipment which can be directly worn on the body, such as an intelligent watch, intelligent glasses, an intelligent bracelet and the like; the most critical part for these intelligent electronic products is the design of the antenna.

The intelligent antenna is a key part in a wireless communication system, and the antenna required by the market of the modern intelligent machine not only needs to meet the requirement of multiple frequency bands to expand the diversity of terminal communication, but also needs to deal with more complex external metal environment. For the design of the smart glasses antenna, not only the problem of complex external environment is faced, but also the design of the smart glasses is more difficult compared with the antenna design of a smart phone; because the smart glasses have a single form and a fixed structure, unlike a mobile phone with a large bottom plate for designing an antenna, the smart glasses antenna has a small design range, which is a great challenge for an antenna engineer.

Common intelligent glasses antennas are designed on the glasses legs, and most of the intelligent glasses antennas are designed with one antenna without forming an MIMO antenna structure; in addition, a plurality of parts are needed for the common antenna to resonate out a plurality of modes, so that the requirement of multiple frequency bands can be met; clearly, another pressing challenge is posed to smart eyewear antenna design. Meanwhile, the intelligent glasses antenna is designed on the glasses legs, the antenna is close to the head of a person, electromagnetic waves are inevitably absorbed by the head of the person, and the SAR value is very high.

Based on the 4G-MIMO intelligent glasses antenna, the invention provides a novel 4G-MIMO intelligent glasses antenna.

Disclosure of Invention

The invention aims to provide a 4G-MIMO intelligent glasses antenna, which is formed by designing two loop antennas on a glasses frame and further covering 4G high and low frequency bands.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a 4G-MIMO smart glasses antenna, the antenna is bilateral symmetry structure, includes: the spectacle frame comprises a spectacle frame dielectric substrate 1, a spectacle leg dielectric substrate 2 vertically connected with the spectacle frame dielectric substrate 1, a metal ring 3 arranged on the front surface of the spectacle frame dielectric substrate 1, a metal floor 4 arranged on the outer side of the spectacle leg dielectric substrate 2, a microstrip feeder line 5, a grounding short-circuit line 6, a parasitic branch 7 and a lumped capacitor 9; the glasses frame is characterized in that the metal ring 3 is an open metal ring, and the open position of the metal ring is over against the connection position of the glasses frame medium substrate 1 and the glasses leg medium substrate 2; the upper opening end of the opening metal ring is connected with the metal floor 4 through a microstrip feeder 5, the joint of the microstrip feeder 5 and the metal floor 4 is used as a feed port, and the lower opening end is connected with the metal floor through a grounding short circuit line 6; a breakpoint gap 8 is further arranged on the metal ring 3, the length between the breakpoint gap and the feed port is 1/4 lambda, and lambda is the working wavelength; the lumped capacitor 9 is arranged on the metal ring 3 and is positioned at one end, close to the microstrip feeder, of the metal ring; the parasitic branch 7 is arranged at the joint of the spectacle frame dielectric substrate 1 and the spectacle leg dielectric substrate 2 and is positioned below the grounding short circuit line 6, one end of the parasitic branch 7 is connected with the metal floor 4, and the other end of the parasitic branch extends to the front surface of the spectacle frame dielectric substrate 1.

Further, the microstrip feed line is composed of a 50 ohm radio frequency line.

Further, the width of becket is 2mm, the length of breakpoint gap is 2 mm.

The invention has the beneficial effects that:

the invention provides a 4G-MIMO intelligent glasses antenna,

the 4G MIMO intelligent glasses antenna fully utilizes the shape of glasses, the loop antenna is printed on a glasses frame, and an MIMO antenna structure is formed according to the symmetry performance of the glasses; meanwhile, a breakpoint gap is arranged at the bottom edge of the metal ring, and the ring structure is divided into two parts by reasonably arranging the position of the breakpoint gap, wherein the length from the feed port of the microstrip feed line to the position of the breakpoint gap is 1/4 lambda of 0.86GHz, the formed monopole antenna generates a 1/4 lambda monopole mode, and the monopole mode and the fundamental mode of the ring antenna jointly cover the 4G low-frequency band 824-960 MHz; in addition, a parasitic branch is arranged at the joint of the spectacle frame dielectric substrate and the spectacle leg dielectric substrate, and a dipole mode generated at 2.6GHz and two high-order modes of a ring cover the 4G high-frequency segment 1710-2690MHz together; and further covering the 4G high-low frequency band to form a 4G-MIMO intelligent glasses antenna.

Drawings

FIG. 1 is a schematic structural diagram of a 4G-MIMO smart glasses antenna according to the present invention; the glasses frame comprises a glasses frame dielectric substrate 1, a glasses leg dielectric substrate 2, a metal ring 3, a metal floor 4, a microstrip feeder 5, a grounding short circuit line 6, a parasitic branch 7, a breakpoint gap 8 and a lumped capacitor 9.

Fig. 2 is a diagram of return loss of a 4G-MIMO smart glasses antenna in the embodiment of the present invention.

Detailed Description

The invention is further described below with reference to the figures and examples.

The embodiment provides a 4G-MIMO smart glasses antenna, the structure of which is shown in fig. 1, wherein the antenna is in a left-right symmetric structure; the method comprises the following steps: the glasses frame comprises a glasses frame dielectric substrate 1 and a glasses leg dielectric substrate 2, wherein the glasses frame dielectric substrate 1 and the glasses leg dielectric substrate 2 are vertically connected; the front surface of the glasses frame dielectric substrate 1 is provided with a metal ring 3, the outer side of the glasses leg dielectric substrate 2 is provided with a metal floor 4, a microstrip feeder line 5 is arranged at the joint of the glasses frame dielectric substrate 1 and the glasses leg dielectric substrate 2, a grounding short-circuit line 6 is arranged below the microstrip feeder line 5, a parasitic branch 7 is arranged below the grounding short-circuit line 6, and the parasitic branch 7 is arranged to generate an additional resonance mode to cover a 4G high frequency band; a breakpoint gap 8 is arranged on the bottom edge of the metal ring 3, and the breakpoint gap 8 is arranged for generating a monopole mode and covering a 4G low frequency band; the metal ring 3 is provided with a lumped capacitor 9, the lumped capacitor is positioned at one end of the metal ring close to the microstrip feeder line, and the lumped capacitor 9 is arranged for neutralizing the inductive value of the loop antenna so as to enable the low frequency resonance of the antenna to be in a required frequency band;

the 4G MIMO intelligent glasses antenna forms a left and right symmetrical double-antenna structure, and the two antennas are connected through the medium substrate. The metal ring 3 divides the ring metal 3 into two parts by arranging a breakpoint gap 8 at the bottom edge, wherein one part connected with the excitation unit forms a monopole antenna, and a generated monopole mode is used for covering the low frequency band of GSM 850/900; meanwhile, the metal ring 3 antenna also generates a ring base mode, and the mode generated by the monopole completely cover the GSM850/900 frequency band; three high-order modes corresponding to the metal ring 3 cover high frequency bands such as GSM1800/1900, UMTS2100 and the like; a parasitic branch 7 is arranged at the joint of the spectacle frame dielectric substrate 1 and the spectacle leg dielectric substrate 2, the parasitic branch 7 and the microstrip feeder 5 form a dipole antenna, and a dipole mode generated by the parasitic branch 7 is used for supplementing the radiation bandwidth of the metal ring 3, so that high frequency bands such as LTE2300/2500 and the like can be completely covered.

In the above embodiment, the microstrip feed line 5 is composed of a 50 ohm radio frequency line; the microstrip feeder 5 is located at the joint of the spectacle frame dielectric substrate 1 and the spectacle leg dielectric substrate 2, naturally connects the metal ring 3 with the metal floor 4, and achieves the purpose of feeding. Further, a break point gap 8 is arranged on the bottom edge of the metal ring 3, the length of the break point gap is 2mm, the length of a feed port of one end, close to the floor, of the microstrip feed line from the break point gap is about 1/4 lambda of 0.86GHz, and lambda is the working wavelength; the width of the metal ring is 2 mm; the lumped capacitor is located at one end of the metal ring close to the microstrip feed line, and the specific location of the lumped capacitor can be specifically adjusted according to the practical application, and in this embodiment, the lumped capacitor is located at a position 21.5m m away from the feed port.

Through test verification, in the embodiment, the low-frequency GSM850/900 is covered by the double resonance generated by the fundamental mode of the loop antenna and the monopole mode of the monopole antenna, the high-frequency GSM1800/1900, UMTS2100 and LTE2300/2500 frequency bands are covered by the modes generated by the high-order mode of the loop antenna and the parasitic branch, and the test and simulation return loss diagram results are shown in fig. 2; the test result shows that the invention is suitable for the application of the intelligent glasses antenna.

While the invention has been described with reference to specific embodiments, any feature disclosed in this specification may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise; all of the disclosed features, or all of the method or process steps, may be combined in any combination, except mutually exclusive features and/or steps.