Miniaturized antenna with reconfigurable frequency

Abstract

The invention discloses a miniaturized antenna with a reconfigurable frequency, which a ground piece, a first dielectric plate arranged on the ground piece, a coupling feeder arranged on the first dielectric plate, a second dielectric plate arranged on the coupling feeder and a radiation unit arranged on the second dielectric plate, wherein the ground piece is electrically connected with the radiation unit through first through holes passing through the first dielectric plate and the second dielectric plate; and the radiation unit is of a split ring resonator structure. In the invention, the antenna size is greatly reduced through adopting the split ring resonator structure as the radiation unit and adopting a Hilbert curve to carry out splitting on SRRs (Split Ring Resonators), thereby achieving the purpose of antenna miniaturization. Meanwhile, a plurality of metal through holes are arranged on the dielectric plates to connect the radiation unit and the ground piece, and the grounding of the radiation antenna at different positions is realized by using the on-off of a variable capacitance diode so as to achieve impedance transformation, so that the number of grounded diodes is changed to adjust the number of switching frequencies.

Description

technical field [0001] The invention relates to the technical field of antennas. More specifically, it relates to a frequency reconfigurable miniaturized antenna. Background technique [0002] As a key component of the navigation equipment and the receiving end of the positioning equipment, the positioning antenna plays an important role in both transportation and daily life. With the trend of device miniaturization, antenna miniaturization has become more and more important. [0003] Antenna miniaturization refers to an antenna whose structural size is smaller compared with other types of antennas under the premise of meeting the technical indicators of the antenna, such as gain, pattern, input impedance, and polarization characteristics. We know that when the frequency is constant, the wavelength of electromagnetic waves in free space is determined. As an element that couples energy with free space, the electrical performance of the antenna is directly limited by the siz...

AI Technical Summary

Problems solved by technology

[0007] ① Loading with lumped components, if lossy components are introduced, the efficiency will decrease and the gain will decrease;

[0008] ② Dielectric material loading will affect the bandwidth of the antenna;

[0009] ③The application of short-circuit technology loading will cause the feed structure to be sensitive to size requirements, and the processing requirements are relatively high;

The main defects of high dielectric constant dielectric substrate antennas are: large surface loss, small gain, low efficiency, and narrow bandwidth

Its characteristics are: as the length of the slot increases, the resonant frequency of the antenna decreases, and the size of the antenna decreases, but excessive reduction in size will cause a sharp degradation in performance, especially the bandwidth and gain.

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