CN110970693A

CN110970693A - Broadband phase shifter and electronic device comprising same

Info

Publication number: CN110970693A
Application number: CN201811142606.3A
Authority: CN
Inventors: 杜洋洋; 陈铁钰
Original assignee: Fuhuake Precision Industry Shenzhen Co ltd
Current assignee: Fuhuake Precision Industry Shenzhen Co ltd
Priority date: 2018-09-28
Filing date: 2018-09-28
Publication date: 2020-04-07

Abstract

A broadband phase shifter is applied to a phased array and comprises a first microstrip line body, a second microstrip line body, a first coupling line, a second coupling line, a coupling short-circuit line, a microstrip line and a capacitor, wherein the first coupling line and the second coupling line are parallel to each other and arranged at intervals, the coupling short-circuit line is connected between the first coupling line and the second coupling line, the microstrip line is connected to the second coupling line, the first coupling line is connected to the first microstrip line body, one end of the capacitor is electrically connected to the second coupling line, and the other end of the capacitor is electrically connected to the second microstrip line body. An electronic device comprising the wideband phase shifter is also provided.

Description

Broadband phase shifter and electronic device comprising same

Technical Field

The invention relates to a compact broadband phase shifter and an electronic device comprising the same.

Background

With the development of modern communication technology, communication systems have higher and higher requirements on communication efficiency. In order to realize faster and more accurate data transmission, MIMO (Multiple-Input Multiple-Output) technology and Phase Array (phased Array) technology are often adopted in communication systems. Phase shifters with high precision Phase control are a key part of MIMO and Phase Array technologies. Most of the existing phase shifters adopt Microstrip line (Microstrip line) coupling mode. Microstrip lines are a common type of signal transmission lines. However, the phase shifter in the prior art has large area or volume and high cost, and is not beneficial to the compact design of the phase shifter.

Disclosure of Invention

In view of the foregoing, it is desirable to provide a compact wideband phase shifter and an electronic device including the same.

A broadband phase shifter is applied to a phased array and comprises a first microstrip line body, a second microstrip line body, a first coupling line, a second coupling line, a coupling short-circuit line, a microstrip line and a capacitor, wherein the first coupling line and the second coupling line are parallel to each other and arranged at intervals, the coupling short-circuit line is connected between the first coupling line and the second coupling line, the microstrip line is connected to the second coupling line, the first coupling line is connected to the first microstrip line body, one end of the capacitor is electrically connected to the second coupling line, and the other end of the capacitor is electrically connected to the second microstrip line body.

An electronic device comprises a circuit board and the broadband phase shifter, wherein the broadband phase shifter is arranged on the circuit board.

The broadband phase shifter is small in area, compact in design is formed, the hardware architecture of the phased array is optimized, and good characteristics of high bandwidth and accuracy are achieved. In addition, the broadband phase shifter is provided with the circuit elements on the single surface of the circuit board, so that double-surface processing is not needed, and the production cost is reduced. Furthermore, the broadband phase shifter can be used as a basic module of the phase shifter and can be applied in series to achieve the required phase shift, so that the use of the broadband phase shifter is more adaptive.

Drawings

Fig. 1 is a schematic structural diagram of a wideband phase shifter according to a preferred embodiment of the invention.

FIG. 2 is a simulation diagram of the wideband and phase shift of the wideband phase shifter according to the preferred embodiment of the present invention.

Description of the main elements

Wideband phase shifter 100

First microstrip line body 10

Second microstrip line body 20

First coupling line CL1

Second coupling line CL2

Coupling gap G1

Coupled short circuit ML1

Microstrip line ML2

Capacitor C1

Third microstrip line body 30

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

Referring to fig. 1, a wideband phase shifter 100 for use in phased array technology for generating a pointing direction of a synthesized beam is provided in accordance with a preferred embodiment of the present invention. The wideband phase shifter 100 includes a first microstrip line body 10, a second microstrip line body 20, a first coupling line CL1, a second coupling line CL2, a coupling short-circuit line ML1, a microstrip line ML2, a capacitor C1, and a third microstrip line body 30.

The first microstrip line body 10 and the second microstrip line body 20 are disposed opposite to each other and spaced apart from each other. The first coupling line CL1, the second coupling line CL2, the coupling short-circuit line ML1, the microstrip line ML2 and the capacitor C1 are connected between the first microstrip line body 10 and the second microstrip line body 20. The end of the first microstrip line body 10 away from the second microstrip line body 20 is a first end 12, and the end of the second microstrip line body 20 away from the first microstrip line body 10 is a second end 22. The first end 12 and the second end 22 are input and output ends of the wideband phase shifter 100, respectively, for inputting and outputting network signals. In this embodiment, the first microstrip line body 10 and the second microstrip line body 20 are 50 ohm microstrip lines. In this embodiment, the length of the region where the first coupling line CL1, the second coupling line CL2, the coupling short-circuit line ML1, the microstrip line ML2 and the capacitor C1 are disposed between the first microstrip line body 10 and the second microstrip line body 20 may be 2.51 mm, and the width may be 1.71 mm, so as to form a compact design.

The first coupling line CL1 is connected to one end of the first microstrip line body 10 opposite to the second microstrip line body 20. The second coupling line CL2 and the first coupling line CL1 are parallel to and spaced apart from each other, forming a coupling gap G1 therebetween. The second and first coupling lines CL2, CL1 extend in a direction that is substantially perpendicular to the direction of extension of the first coupling line CL 1.

The coupling short-circuit line ML1 is connected between the first and second coupling lines CL1 and CL 2. The microstrip line ML2 is connected to the second coupling line CL 2. Specifically, the coupling short-circuit line ML1 and the microstrip line ML2 are respectively connected to opposite ends of the second coupling line CL 2. The extension direction of the coupling short-circuit line ML1 is substantially perpendicular to the first and second coupling lines CL1 and CL 2. The extension direction of the microstrip line ML2 is the same as the extension direction of the second coupling line CL 2. The width of the microstrip line ML2 is smaller than the width of the second coupling line CL 2.

One end of the capacitor C1 is electrically connected to the end of the second coupling line CL2 connected to the microstrip line ML 2. The other end of the capacitor C1 is electrically connected to the second microstrip line body 20. In this embodiment, the capacitor C1 may be a varactor.

The third microstrip line body 30 is disposed at an interval from the first microstrip line body 10, the second microstrip line body 20, the first coupling line CL1, the second coupling line CL2, the coupling short-circuit line ML1, the microstrip line ML2, and the capacitor C1. In this embodiment, the third microstrip line body 30 is a 50 ohm microstrip line and serves as a 0 ° reference phase. The opposite ends of the third microstrip line body 30 are an input end and an output end, respectively.

The broadband phase shifter 100 is disposed on one side of a circuit board. In this embodiment, the circuit board may be made of FR-4 grade composite material, has better electrical insulation, stability and flatness, and is suitable for the requirement of electrical insulation of the width phase shifter 100. The thickness of the circuit board may be 1 mm.

The purpose of realizing the miniaturization of the broadband phase shifter 100 and the broadband high-precision phase shifting is achieved by optimally adjusting the lengths and the widths of the first coupling line CL1 and the second coupling line CL2, the width of the coupling gap G1, the length and the width of the microstrip line ML2 and the capacitance value of the capacitor C1.

Referring to fig. 2, a schematic diagram of a simulation of the broadband and phase shift of the broadband phase shifter 100 according to an embodiment of the present invention is shown, and the calculation simulation of the broadband phase shifter 100 provided in fig. 1 in the frequency band of 2.000 to 8.000GHz is performed by using ADS simulation software. As shown in fig. 2, when operating in the 2.222GHz band, the phase shift of the wideband phase shifter 100 is 4.950 °; when the broadband phase shifter 100 works in the 3.586GHz frequency band, the phase shift is 4.511 degrees; when the broadband phase shifter 100 works in a 7.117GHz frequency band, the phase shift is 4.944 degrees; when the broadband phase shifter 100 works in the 7.836GHz frequency band, the phase shift is 4.949 degrees. Therefore, in the operating frequency band of 2.222-7.836GHz, the phase shift of the broadband phase shifter 100 is 4.7 degrees +/-0.25 degrees, and the relative bandwidth is 111%.

The broadband phase shifter 100 of the present invention has a small area, forms a compact design, optimizes the hardware architecture of the phased array, and simultaneously realizes the better characteristics of high bandwidth and accuracy. In addition, the broadband phase shifter 100 reduces the production cost by disposing the circuit elements on one side of the circuit board without double-sided processing. Furthermore, the wideband phase shifter 100 can be used as a basic module of a phase shifter, and can be applied in series to achieve a desired phase shift, so that the use of the wideband phase shifter 100 is more flexible.

In view of the above, although the preferred embodiments of the present invention have been disclosed for illustrative purposes, the present invention is not limited to the above-described embodiments, and those skilled in the relevant art can make various modifications and applications without departing from the scope of the basic technical idea of the present invention.

Claims

1. A broadband phase shifter is applied to a phased array and is characterized in that: the broadband phase shifter comprises a first microstrip line body, a second microstrip line body, a first coupling line, a second coupling line, a coupling short-circuit line, a microstrip line and a capacitor, wherein the first coupling line and the second coupling line are parallel to each other and arranged at intervals, the coupling short-circuit line is connected between the first coupling line and the second coupling line, the microstrip line is connected to the second coupling line, the first coupling line is connected to the first microstrip line body, one end of the capacitor is electrically connected to the second coupling line, and the other end of the capacitor is electrically connected to the second microstrip line body.

2. The wideband phase shifter of claim 1, wherein: the first microstrip line body and the second microstrip line body are arranged oppositely and at intervals; the first coupling line, the second coupling line, the coupling short-circuit line, the microstrip line and the capacitor are connected between the first microstrip line body and the second microstrip line body; the end of the first microstrip line body, which is far away from the second microstrip line body, is a first end, and the end of the second microstrip line body, which is far away from the first microstrip line body, is a second end; the first end and the second end are respectively an input end and an output end of the broadband phase shifter and are used for inputting and outputting network signals.

3. The wideband phase shifter of claim 2, wherein: the first coupling line is connected to one end of the first microstrip line body, which is opposite to the second microstrip line body; a coupling gap is formed between the first coupling line and the second coupling line; the extending directions of the second coupling line and the first coupling line are approximately perpendicular to the extending direction of the first coupling line.

4. The wideband phase shifter of claim 3, wherein: the coupling short circuit line and the microstrip line are respectively connected to the two opposite ends of the second coupling line; the extension direction of the coupling short circuit line is perpendicular to the first coupling line and the second coupling line; the extension direction of the microstrip line is the same as that of the second coupling line; the width of the microstrip line is smaller than that of the second coupling line.

5. The wideband phase shifter of claim 4, wherein: one end of the capacitor is electrically connected to one end of the second coupling line connected with the microstrip line; the capacitor is a varactor.

6. The wideband phase shifter of claim 4, wherein: and adjusting the lengths and widths of the first coupling line and the second coupling line, the width of the coupling gap, the length and width of the microstrip line and the capacitance value of the capacitor, so that the broadband phase shifter has broadband high-precision phase shifting when working in a frequency band of 2.222-7.836 GHz.

7. The wideband phase shifter of claim 1, wherein: the broadband phase shifter also comprises a third microstrip line body, the third microstrip line body is arranged at intervals of the first microstrip line body, the second microstrip line body, the first coupling line, the second coupling line, the coupling short-circuit line, the microstrip line and the capacitor, and the opposite two ends of the third microstrip line body are respectively an input end and an output end.

8. An electronic device comprising a circuit board, characterized in that: the electronic device comprising a wideband phase shifter as claimed in any one of claims 1 to 7 disposed on the circuit board.

9. The electronic device of claim 8, wherein: the circuit board is made of an FR-4 grade composite material.