Reconfigurable antenna used for mobile terminal

Abstract

A reconfigurable antenna system for a mobile terminal belongs to the field of mobile terminal antennae and is characterized in that the reconfigurable antenna system is printed on a printed circuit board and comprises a variable radiation unit, a feeder line, a direct current power supply circuit and a metal ground. The radiation unit comprises a variable radiation structure and a public unit structure which are connected by using a PIN diode switch. The height of the antenna is 10mm, and the antenna feeds by a 50-ohm microstrip line. A direct current bias circuit which is arranged below the radiation unit controls the switching-on and off of a PIN diode; and a direct current pathway adopts an alternating current isolation inductor to prevent the alternating current on the radiation unit from passing. The metal ground is the metal surface that does not contain the antenna radiation unit of the two surfaces of the circuit board, and the metal ground comprises a rectangular metal patch and two F-shaped metal patches of the other parts except the antenna in the mobile terminal of an analog wireless communication system. The reconfigurable antenna system has the advantages of multi-band, compact structure and easy integration and is characterized in that the reconfigurable antenna system can support the reconfigurable function of a directional pattern and be applicable to the mobile communication terminal, in particular to the reconfigurable antenna structure of the small-sized mobile terminal.

Description

technical field [0001] The invention belongs to the field of mobile terminal reconfigurable antenna design, in particular to a mobile terminal reconfigurable antenna system structural design used in a complex communication environment. Background technique [0002] Human society has stepped into the information society, and people's demand for instant communication is getting higher and higher. Therefore, wireless transmission technology will also play an increasingly important role. All wireless communication systems use radio waves to work, and the reception and transmission of radio waves are accomplished by antennas. [0003] Antennas are an important part of a communication system, and antenna performance may enhance or limit the performance of the overall communication system. The mobile communication system is continuously upgraded in terms of function, capacity, quality and service business, which puts forward higher and higher performance index requirements for mob...

AI Technical Summary

Problems solved by technology

[0003] The antenna is an important part of the communication system, and the performance of the antenna may enhance or limit the performance of the entire communication system

The mobile communication system is continuously upgraded in terms of function, capacity, quality and service business, which puts forward higher and higher performance index requirements for mobile terminal antennas; at the same time, the antenna system usually works in a complex mobile propagation environment, and radio waves propagate in the air The channel will be affected by environmental factors such as terrain, temperature, humidity, etc., all of which will adversely affect the quality of communication

Images