Non-contact variable capacitance loaded bandwidth reconfigurable microstrip patch filtering antenna

A technology of variable capacitors and microstrip patches, applied in antennas, slot antennas, resonant antennas, etc., can solve the problem of out-of-band suppression level decline, achieve flexible bandwidth tuning, good filtering performance, and achieve reconfigurable effects

Pending Publication Date: 2021-12-21
NANTONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its out-of-band rejection level drops severely when tuning the operating frequency

Method used

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  • Non-contact variable capacitance loaded bandwidth reconfigurable microstrip patch filtering antenna
  • Non-contact variable capacitance loaded bandwidth reconfigurable microstrip patch filtering antenna
  • Non-contact variable capacitance loaded bandwidth reconfigurable microstrip patch filtering antenna

Examples

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Embodiment Construction

[0020] The present invention will be described in detail below in conjunction with the accompanying drawings for further explanation, so that those skilled in the art can understand the present invention more deeply and can implement it, but the following examples are only used to explain the present invention, not as the present invention limit.

[0021] like figure 1 and figure 2 As shown, the non-contact variable capacitance loaded bandwidth reconfigurable microstrip patch filter antenna includes a metal reflective floor 11, a bottom substrate 10, a top substrate 8 and a microstrip patch 1 stacked in sequence from bottom to top; The feed port 2 is set on the top substrate 8; the non-contact microstrip line 9 is set between the top substrate 8 and the bottom substrate 10; line; the vertical projection of the non-contact microstrip line 9 on the surface of the top substrate 8 partially overlaps with the microstrip patch 1; the feed port 2 and the non-contact microstrip lin...

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Abstract

The invention belongs to the technical field of antenna communication, and particularly relates to a non-contact variable capacitance loaded bandwidth-reconfigurable microstrip patch filtering antenna. Two pairs of gaps with different lengths are etched in the microstrip patch in the x-axis direction, namely the antenna polarization direction, so that two radiation zero points are generated to obtain good filtering performance, and extra high-frequency resonance points capable of being used for expanding the working bandwidth of the antenna are generated. In order to realize a bandwidth reconfigurable function, a non-contact variable capacitance loaded microstrip line is placed along the x-axis direction as a tuning structure. A through hole penetrating through a top layer substrate is used for being connected with a variable capacitor placed on the upper surface of the top layer substrate. The overlapping area of the non-contact microstrip line and a microstrip patch is controlled by adjusting the variable capacitor, and the low-frequency resonance mode and the low-end radiation zero point of the filtering antenna can be adjusted at the same time, so that the bandwidth of the antenna is reconfigurable. While the bandwidth of the filtering antenna is flexibly tuned, the antenna can maintain good filtering performance.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a bandwidth-reconfigurable microstrip patch filter antenna loaded with a non-contact variable capacitance. Background technique [0002] With the rapid development of wireless communication systems, the electromagnetic spectrum has become very crowded. Frequency reconfigurable communication systems have attracted increasing attention due to their efficient use of spectrum. As a frequency reconfigurable antenna, bandwidth reconfigurable antenna can provide more bandwidth, compact device size, reduce interference, and significantly improve data transmission efficiency to enhance the functionality of the antenna. On the other hand, the filter antenna is a new concept that can realize both radiation and filtering functions, which can eliminate the interconnection matching network and realize the miniaturization of the RF front-end circuit. As a combinatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01Q1/38H01Q9/04H01Q13/10
CPCH01Q9/0407H01Q1/38H01Q13/106
Inventor 陈建新张小珂王雪颖唐世昌杨永杰
Owner NANTONG UNIVERSITY
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