Multiparameter Reconfigurable Dipole Antenna Based on Tunable Artificial Magnetic Conductor

Abstract

The invention provides a multi-parameter reconfigurable dipole antenna based on a tunable artificial magnetic conductor. The multi-parameter reconfigurable dipole antenna comprises dual layers of dielectric substrates which are supported and stacked by a support, wherein an upper layer of dielectric substrate comprises a pair of dipole antennas, an E-shaped microstrip feeder and a coaxial feed probe, the pair of dipole antennas are printed on an upper surface, the E-shaped microstrip feeder is printed on a lower surface, the coaxial feed probe is inserted into the dipole antennas on the upper surface from the E-shaped feeder on the lower surface, a lower layer of dielectric substrate comprises a tunable artificial magnetic conductor reflection plate, a variable capacitance diode and a metal ground plate, the tunable artificial magnetic conductor reflection plate is printed on an upper surface, the variable capacitance diode is welded on the upper surface, the metal ground plate is printed on a lower surface of a lower layer of dielectric substrate, the antenna comprises a pair of dipole antennas arranged in parallel along an y axis, the tunable artificial magnetic conductor reflection plate is divided into a plurality of polarization twist units, the plurality of polarization twist units are same in sizes and are centrally and symmetrically arranged, each polarization twist unit comprises a square metal patch and four variable capacitance diodes, the square metal patch is cut in a diagonal way, and the four variable capacitance diodes are connected with gaps. By appropriately adjusting capacitance values of the variable capacitance diodes, the left-hand circular polarization, the right-hand circular polarization, linear polarization rapid switching, frequency tunabiltiy of linear polarization and circular polarization of the antenna can be achieved.

Description

technical field [0001] The invention relates to a reconfigurable antenna, in particular to a multi-parameter reconfigurable dipole antenna based on an adjustable artificial magnetic conductor structure. Background technique [0002] With the increasing development of information technology, traditional antennas cannot meet the development requirements of modern wireless communication systems (such as satellite communications, navigation systems, WLAN, etc.) in terms of functions and performance. It is possible to use one antenna structure to dynamically change the physical structure or size, and change its key characteristic parameters (such as operating frequency, radiation pattern, polarization mode, etc.) to adapt to different electromagnetic environments and realize the reproducibility of multiple antenna functions. Constructed antennas have become a research hotspot. [0003] In recent years, metamaterials have also been applied to reconfigurable antennas due to their ...

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Problems solved by technology

W. Yang et al. proposed an artificial magnetic conductor structure with polarization torsion characteristics. This structure makes the surface impedance of the artificial magnetic conductor unbalanced by introducing eccentric metal posts, so that it has polarization torsion characteristics; then, this pole The polarization-twisted artificial magnetic conductor structure is applied to the dipole antenna, and a circularly polarized dipole antenna based on the polarization-twisted artificial magnetic conductor is proposed. By changing the placement position of the dipole antenna, the left-handed circular polarization, Fast switching between right-handed circular polarization and ±45° linear polarization, but this mechanical method is not easy to operate flexibly; therefore, this polarization-twisted artificial magnetic conductor structure is then applied to crossed dipole antennas, and a new method based on The polarization reconfigurable dipole antenna of the polarization-reversed artificial magnetic conductor, by introducing a switch to control the feed network, realizes the multi-polarization characteristics of the antenna more flexibly

However, these reconfigurable antennas are reconfigurable by controlling the dipole antenna, and the distance between the eccentric metal posts in the polarization twisted plate is fixed, so the flexibility is not high; in addition, these reconfigurable technologies can only realize Single-parameter reconfigurability does not allow multi-parameter reconfiguration

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