Frequency-tunable microstrip patch resonator based on half-cut technology

Abstract

The invention relates to a frequency-tunable microstrip patch resonator based on half-cut technology, which includes a metal ground, a bottom substrate, a top substrate and a microstrip patch stacked sequentially from bottom to top. A microstrip line for frequency tuning. The microstrip line for frequency tuning overlaps the microstrip patch in a non-contact manner through the top substrate. The terminals are electrically connected, the outer terminal of the variable capacitor is electrically connected to the metal ground, and the side of the microstrip patch away from the variable capacitor is grounded. Frequency tuning uses a microstrip line and a variable capacitor to form a non-contact frequency tuning structure, which is used to continuously tune the frequency of the resonator. The present invention proposes a new non-contact variable capacitance loading scheme for the first time to design a frequency reconfigurable microstrip patch resonator working under the main mode TM10.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a frequency-tunable microstrip patch resonator based on half-cut technology. Background technique [0002] With the miniaturization of communication systems, more components need to be integrated into a limited space, so the miniaturization technology of antennas has received extensive attention. But the size of the antenna is closely related to its performance, so the design for miniaturized antenna is not easy. The method of antenna miniaturization can be: (1) Maintain the original frequency of the antenna and reduce its physical size. (2) Keep the physical size of the antenna unchanged and reduce its operating frequency to achieve the effect of reducing the electrical size of the antenna. The miniaturization technology for microstrip antennas is currently mainly based on the use of new materials or novel antenna structures. For example, a compact magnetodiele...

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Problems solved by technology

[0005] However, the above designs all connect the tunable structure directly to the radiation patch, which makes the variable capacitance have a great influence on the radiation performance of the resonator. Therefore, a new non-contact variable capacitance loading scheme is proposed for the first time to design Frequency reconfigurable resonator operating in the main mode TM10 mode, compared with conventional frequency reconfigurable microstrip patch resonators, a non-contact variable capacitive loading scheme separates the radiating patch from the tunable structure In the future, when applied to the antenna, it can reduce the impact of loading the tunable structure on the radiation performance of the resonator and improve the degree of freedom of design

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