A Metal Frame Dual Frequency Coupling Antenna

Abstract

A double-frequency coupled antenna with a metal frame comprises the metal frame, a printed circuit board (PCB) arranged in the metal frame, and an antenna unit, wherein the metal frame comprises a closed loop metal frame formed by a first frame, a second frame, a third frame and a fourth frame, the PCB comprises a circuit area and a clearance area, the antenna unit comprises a feed line and a coupling line, the feed line is connected with a feed source, the coupling line is electrically connected with the fourth metal frame, and two ends of the fourth frame are connected with a ground of the PCB to form a closed-loop radiation loop. According to the double-frequency coupled antenna with the metal frame, the metal frame is designed as a part of an antenna irradiator, and projection areas of the PCB of the antenna are reduced; the metal frame does not need slotting, by means of a coupled feeding manner, current of the antenna in the whole radiation loop can be more evenly distributed, and the problem that finger touch affects properties of the antenna of mobile terminals is solved; by means of a slotting manner, the requirement of the antenna for PCB clearance environments is reduced, and thus, the antenna is applicable to more complicated mobile phone environments.

Description

technical field [0001] The invention belongs to the technical field of antennas, and in particular relates to a metal frame dual-frequency coupling antenna. Background technique [0002] At present, portable terminal products with metal texture are favored by consumers, but too many metal structural parts are not conducive to the design of antennas. Moreover, based on the requirements of styling, the thickness of mobile phones is getting thinner and thinner, the space for antennas is getting smaller and smaller, and the environment around the antennas is becoming more and more complex. Therefore, in a limited space and complex environment, the integration of metal structures, simultaneous consideration of user experience, and multi-frequency antennas are required, which poses challenges to antenna design. [0003] The existing metal frame designs use the metal frame as a part of the antenna radiation, which is to take into account the user's pursuit of metal feeling and red...

AI Technical Summary

Problems solved by technology

The slit will definitely cause the accumulation of charge, causing the user's finger touch to have a great impact on the performance of the antenna

[0004] In addition, the slotted antenna has always been considered as an effective method to solve the problem that the metal frame must be slotted because of its antenna characteristics of low closed loop and narrow headroom. It has been difficult to be applied to mobile terminals, so the study of multi-frequency small closed-loop metal frame slotted antennas has extremely high practical value

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