A radio frequency switch type compact multi-band mobile phone antenna

Abstract

The invention belongs to the cell phone antenna technology field, and relates to a general compact multi-frequency band cell phone antenna adopting a radio frequency switch. The antenna comprises a grounding plate, a feeding point, a radiation paster, a feeding point part matching, an end part grounding point, an end part grounding point radio frequency switch, an end part grounding point matching, a middle grounding point, and a middle grounding point radio frequency switch. The feeding point is parallely connected with an inductor, and the radiation paster is disposed in a cavity having a rectangular long strip-shaped structure of a side wall of a cell phone housing, and the space of the radiation paster, which is 3mm away from the grounding plate, is the antenna clearance zone. The end part grounding point and the middle grounding point are respectively connected with a radio frequency switch having a single-pole four-throw structure, and branches of the radio frequency switch are connected with inductance structures having different inductance values, and the inductance structures are respectively connected with the grounding plate. The radio frequency switch-type compact multi-frequency band cell phone antenna has advantages of reasonable overall structural design, cell phone space saving, wide frequency band, high efficiency, strong universality, good anti-interference capability, and application environment friendly performance.

Description

Technical field: [0001] The invention belongs to the technical field of mobile phone antennas, and relates to a general compact multi-band mobile phone antenna using a radio frequency switch, which can save space and improve receiving strength when used in mobile phones. Background technique: [0002] At present, mobile phone antennas mainly use built-in conformal antennas. The mobile phone manufacturer first determines the structural layout of the mobile phone, and gives the distribution area and environment of the antenna based on experience. On this basis, the antenna manufacturer adjusts the size, shape and matching of the antenna. There are more and more components in the existing mobile phones, so that the wiring area and headroom left for the mobile phone antenna are getting smaller and smaller. In addition, the mobile phone supports more and more frequency bands, and the research and development cycle of the mobile phone is getting shorter and shorter. Therefore, the ...

AI Technical Summary

Problems solved by technology

However, by using two single-pole four-throw RF switches to switch the matching of the antenna, the corresponding frequency band can be designed in the 3mm clearance and the antenna height of 4mm, and then the environment of the antenna is pretreated to keep it away from the devices that affect the performance of the antenna. The antenna is made into a module in advance, and the same antenna is used for mobile phones of the same size. The mobile phone antenna that realizes the above functions has not been found in public reports

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