Variable-frequency microstrip antenna

Abstract

The invention discloses a variable-frequency microstrip antenna which comprises a floor, a radiant plate, a connector and at least two short circuit plates, wherein the connector is connected to the radiant plate through a feeding point arranged on the radiant plate; electromagnetic radiation is formed by excitation to the radiant plate through the connector from the downside of the floor; and the conduction state of the short circuit plates is controllable, one ends of the short circuit plates are connected to the radiant plate through connecting points arranged at the edge of the radiant plate and the other ends of the short circuit plates are connected to the floor, and the connecting state of the radiant plate and the floor can be controlled through controlling the conduction state of the short circuit plates. According to the variable-frequency microstrip antenna, the working frequency is changed through changing the conduction state of the short circuit plates; and the variable-frequency microstrip antenna works in a wider frequency band, and the antenna performance is improved.

Description

technical field [0001] The invention relates to a design method of a frequency-variable microstrip antenna, in particular to a frequency-variable microstrip antenna in which a radiation plate and a floor are connected through a plurality of short-circuit boards, and the on / off state of the short-circuit board is controllable. Background technique [0002] The rapid development of today's wireless communication technology has driven the development of multi-mode mobile terminals. Since the working frequency bands of various communication standards are different, the antenna of the mobile terminal needs to support multiple working frequency bands at the same time. However, the traditional microstrip antenna is difficult to meet the requirements of miniaturization, broadband, and multi-band at the same time due to the limitation of the basic relationship of size, bandwidth, and efficiency. At present, most multi-mode mobile terminals use multi-frequency antennas or multi-antenn...

AI Technical Summary

Problems solved by technology

However, due to the limitation of the basic relationship of size, bandwidth and efficiency, the traditional microstrip antenna is difficult to meet the requirements of miniaturization, broadband and multi-band at the same time.

At present, most multi-mode mobile terminals use multi-frequency antennas or multi-antenna solutions, but with the application of new communication standards, the number of frequency bands covered by traditional multi-frequency antennas cannot meet the requirements, and are limited by the size of mobile terminals. The use of multiple antennas in the space will generate strong mutual coupling, and multiple antennas will also increase the cost and energy consumption of the terminal, so the antenna problem will become an obstacle to the development of multi-mode technology in the future

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