CN110690566A

CN110690566A - Directional diagram reconfigurable microstrip antenna based on single-pole single-throw switch

Info

Publication number: CN110690566A
Application number: CN201911000223.7A
Authority: CN
Inventors: 李强; 曹钎龙; 李孟委; 吴倩楠; 朱光州
Original assignee: North University of China
Current assignee: North University of China
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-01-14

Abstract

The invention belongs to the technical field of microstrip antennas, and particularly relates to a directional diagram reconfigurable microstrip antenna based on a single-pole single-throw switch, which comprises a rectangular main patch, an auxiliary patch, a dielectric substrate silicon chip, an impedance rheostat, a 50-ohm electric wire and a single-pole single-throw switch, wherein the rectangular main patch and the auxiliary patch are arranged on the upper surface of the dielectric substrate silicon chip, the rectangular main patch is connected with the 50-ohm electric wire through the impedance rheostat, the auxiliary patch comprises a first auxiliary patch and a second auxiliary patch, the single-pole single-throw switch comprises a first single-pole single-throw switch and a second single-pole single-throw switch, the first auxiliary patch and the second auxiliary patch are respectively connected with the rectangular main patch through the first single-pole single-throw switch and the second single-pole single-throw switch, and the first single-pole single-throw switch and the second single-pole single-throw switch are both connected with a direct. The invention can realize 35GHz directional diagram reconstruction, and has large gain and wider relative bandwidth. The invention is suitable for the directional diagram reconstruction of the microstrip antenna.

Description

Directional diagram reconfigurable microstrip antenna based on single-pole single-throw switch

Technical Field

The invention belongs to the technical field of microstrip antennas, and particularly relates to a directional diagram reconfigurable microstrip antenna based on a single-pole single-throw switch.

Background

Microstrip antennas are increasingly gaining importance in miniaturization of devices due to their advantages of small size, light weight, thin profile, and good electromagnetic compatibility.

The reconfigurable antenna of the Ka wave band has better directivity in satellite signal transmission, can enhance the anti-interference capability of signals and realize the integrity of signal transmission. The high frequency of the signal realizes a larger absolute bandwidth than the low frequency under the condition that the relative bandwidth is fixed, thereby increasing the data throughput.

Disclosure of Invention

Aiming at the technical problems, the directional diagram reconfigurable microstrip antenna based on the single-pole single-throw switch is simple in structure, low in loss and high in reliability.

In order to solve the technical problems, the invention adopts the technical scheme that:

the utility model provides a microstrip antenna is restructured to directional diagram based on single-pole single-throw switch, includes rectangle main paster, vice paster, medium base plate silicon chip, impedance varistor, 50 ohm electric wires, single-pole single-throw switch, rectangle main paster and vice paster set up the upper surface at medium base plate silicon chip, rectangle main paster is connected with 50 ohm electric wires through impedance varistor, vice paster includes first pair paster and the vice paster of second, single-pole single-throw switch includes first single-pole single-throw switch and second single-pole single-throw switch, first pair paster and the vice paster of second are connected with rectangle main paster through first single-pole single-throw switch and second single-pole single-throw switch respectively, first single-pole single-throw switch and second single-pole single-throw switch all are connected with the direct current bias line.

And the lower surface of the dielectric substrate silicon wafer is connected with a metal grounding plate.

The first and second sub-patches are equidistant from the rectangular main patch.

The impedance rheostat adopts a quarter-wave impedance rheostat.

The feeder line adopts a 50 ohm feeder line.

Compared with the prior art, the invention has the following beneficial effects:

the invention realizes the connection between the main patch and the auxiliary patch by controlling the on-off of the single-pole single-throw switch between the rectangular main patch and the auxiliary patch, so that the change of the maximum radiation direction is realized, and the directional diagram is reconfigurable.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a graph of simulation results of return loss of the present invention in a directional diagram state;

FIG. 3 is a radiation pattern of the present invention;

FIG. 4 is a current distribution diagram of the present invention in a pattern state;

FIG. 5 is a diagram of the present invention in the direction of maximum radiation;

wherein: the chip comprises a rectangular main patch 1, a dielectric substrate silicon wafer 2, an impedance rheostat 3, a 50-ohm electric wire 4, a first auxiliary patch 5, a second auxiliary patch 6, a first single-pole single-throw switch 7, a second single-pole single-throw switch 8, a direct-current bias wire 9 and a metal grounding plate 10.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The directional diagram reconfigurable microstrip antenna based on the single-pole single-throw switch comprises a rectangular main patch 1, an auxiliary patch, a dielectric substrate silicon wafer 2, an impedance variable resistor 3, a 50-ohm electric wire 4 and the single-pole single-throw switch, wherein the rectangular main patch 1 and the auxiliary patch are arranged on the upper surface of the dielectric substrate silicon wafer 2, the rectangular main patch 1 is connected with the 50-ohm electric wire 4 through the impedance variable resistor 3, the auxiliary patch comprises a first auxiliary patch 5 and a second auxiliary patch 6, the single-pole single-throw switch comprises a first single-pole single-throw switch 7 and a second single-pole single-throw switch 8, the first auxiliary patch 5 and the second auxiliary patch 6 are connected with the rectangular main patch 1 through the first single-pole single-throw switch 7 and the second single-pole single-throw switch 8 respectively, and the first single-pole single-throw switch 7 and the second single-pole single-throw switch 8 are both connected with a direct current bias line 9.

Further, the lower surface of the dielectric substrate silicon wafer 2 is connected with a metal grounding plate 10.

Further, the first and second sub-patches 5 and 6 are equidistant from the rectangular main patch 1.

Further, it is preferable that the impedance varistor 3 is a quarter-wave impedance varistor.

Further, it is preferable that the power feeding line 4 is a 50 ohm power feeding line.

The working principle of the invention is as follows: the invention realizes the connection between the main patch and the auxiliary patch by controlling the on-off of the single-pole single-throw switch between the rectangular main patch and the auxiliary patch, so that the maximum radiation direction is changed, and the directional diagram is reconfigurable.

Examples

The invention models and simulates in HFSS.15 of commercial full-wave electromagnetic simulation software of ANSYS company.

As shown in FIG. 2, the center frequency of the pass band of the polarization reconfigurable microstrip antenna is 35.5GHz in four polarization states, the return loss in the pass band is lower than-10 d B, and the relative bandwidth is larger than 5%.

As shown in fig. 3, the gain of the polarization reconfigurable microstrip antenna at the center frequency is 5.57 dB.

Although only the preferred embodiments of the present invention have been described in detail, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and all changes are encompassed in the scope of the present invention.

Claims

1. A directional diagram reconfigurable microstrip antenna based on a single-pole single-throw switch is characterized in that: comprises a rectangular main patch (1), an auxiliary patch, a dielectric substrate silicon chip (2), an impedance varistor (3), a feeder line (4) and a single-pole single-throw switch, the rectangular main patch (1) and the auxiliary patch are arranged on the upper surface of the dielectric substrate silicon wafer (2), the rectangular main patch (1) is connected with a feeder line (4) through an impedance rheostat (3), the sub-patches comprising a first sub-patch (5) and a second sub-patch (6), the single-pole single-throw switch comprises a first single-pole single-throw switch (7) and a second single-pole single-throw switch (8), the first auxiliary patch (5) and the second auxiliary patch (6) are respectively connected with the rectangular main patch (1) through a first single-pole single-throw switch (7) and a second single-pole single-throw switch (8), the first single-pole single-throw switch (7) and the second single-pole single-throw switch (8) are both connected with a direct-current bias line (9).

2. The directional diagram reconfigurable microstrip antenna based on the single-pole single-throw switch of claim 1, wherein: the lower surface of the dielectric substrate silicon wafer (2) is connected with a metal grounding plate (10).

3. The directional diagram reconfigurable microstrip antenna based on the single-pole single-throw switch of claim 1, wherein: the first secondary patch (5) and the second secondary patch (6) are equal in distance to the rectangular primary patch (1).

4. The directional diagram reconfigurable microstrip antenna based on the single-pole single-throw switch of claim 1, wherein: the impedance rheostat (3) adopts a quarter-wavelength impedance rheostat.

5. The directional diagram reconfigurable microstrip antenna based on the single-pole single-throw switch of claim 1, wherein: the feeder (4) is a 50 ohm feeder.