Differential feed dual-frequency planar antenna

Abstract

The invention discloses a differential feed dual-frequency planar antenna, which comprises a reflecting plate, a supporting structure, a first feed line, a second feed line, a dielectric substrate andan antenna radiation unit, wherein the dielectric substrate is fixed on the reflecting plate through the supporting structure; the first feed line and the second feed line are connected with the reflecting plate and the dielectric substrate; the antenna radiation unit is etched on the dielectric substrate and comprises a first bowtie oscillator, a second bowtie oscillator, a first long arm oscillator, a second long arm oscillator and a microstrip feed structure; the first bowtie oscillator and the second bowtie oscillator are symmetrical; the first long arm oscillator and the first bowtie oscillator are connected; the second long arm oscillator and the second bowtie oscillator are connected; the first long arm oscillator and the second long arm oscillator are symmetrical; and the microstrip feed structure is connected with the first bowtie oscillator and the second bowtie oscillator. The differential feed structure is adopted to be combined with a plane structure, combination with thedifferential radio frequency front end is facilitated, dual-frequency work is realized, the gains are high, and a radiation pattern is stable.

Description

technical field [0001] The invention relates to the research field of mobile communication, in particular to a differential feeding dual-frequency planar antenna. Background technique [0002] The integrated RF front-end using differential ports has gained more and more attention in recent years, because most of the traditional antennas are designed as single-port devices. In order to solve the integration of single-port antennas and RF front-ends, baluns (baluns) are usually used The differential signal is converted into a single-port signal and fed to the single-port antenna. The difference between the differential antenna and the traditional antenna is that the differential antenna uses two feed ports, which can directly feed the signal to the two ports of the antenna, thus avoiding the use of baluns and reducing the loss of the signal at the input port. The efficiency of the antenna is improved, and at the same time, it can be directly connected to the RF front end, whi...

AI Technical Summary

Problems solved by technology

The notch antenna has the advantages of simple structure and easy manufacture, but the notch antenna is generally an omnidirectional antenna with low gain and unstable pattern; the dipole antenna is generally a combination of multiple independent dipoles, and multiple feed ports need to be set. Increased the complexity of the system, and the vibrator antenna is mostly a three-dimensional structure, occupying a large radiation area, which is not easy to arrange on a large scale in actual situations

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