S-Ku wave band broadband power divider

Abstract

The utility model relates to an S-Ku wave band broadband power divider, comprising a printed board, the printed board comprises a substrate and a wire, the substrate is connected with the wire, the substrate is a broadband substrate, and the wire is a one-to-two structure circuit. The tool has the characteristics of realizing broadband, miniaturization and low insertion loss performance of the power divider.

Description

Technical Field

[0001] The utility model belongs to the technical field of microwave engineering, and particularly relates to an S-Ku band broadband power divider. Background Art

[0002] The full name of power divider is power distributor. It is a device that divides the energy of one input signal into two or more outputs with equal or unequal energy. It can also combine the energy of multiple signals into one output. In this case, it is also called a combiner. Power dividers are mainly used in radio frequency microwave communication systems to realize signal splitting or combining. Among them, S-band power dividers are widely used in radar and base station feed point network construction. Conventional S~ku band power dividers have a wide frequency band, so they have many orders and large sizes. However, the wide-band chip power dividers on the market have large losses. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide an S-Ku band broadband power divider to achieve the broadband, miniaturization and low insertion loss performance of the power divider.

[0004] The utility model provides the following technical solutions:

[0005] An S-Ku band broadband power divider comprises a printed board, wherein the printed board comprises a substrate 1 and a wiring 2, the substrate 1 is connected with the wiring 2, the substrate is a broadband substrate, and the wiring 2 is a one-to-two structure circuit.

[0006] Optionally, a shell 3 is further included, and the printed circuit board is fixedly installed in the shell 3.

[0007] Optionally, two fixing ears 31 are respectively provided on both sides of the shell 3, and the fixing ears 31 are provided with fixing holes.

[0008] Optionally, one side of the one-to-two structure circuit is provided with an input line 21, and the other side of the one-to-two structure circuit is provided with a first output line 22 and a second output line 23.

[0009] Optionally, the input line is connected to a half-wavelength impedance transformation segment transmission line, and the first output line and the second output line are both connected to a one-to-two output segment transmission line.

[0010] Optionally, both the first output line 22 and the second output line 23 are curved lines, and the curved lines are provided with arc-shaped curved sections of multiple orders, and each arc-shaped curved section is connected to an isolation resistor 4 away from the input line.

[0011] Optionally, the curved line gradually becomes thicker from the input line to the output line, and the isolation resistors gradually become thinner from the input line to the output line.

[0012] Optionally, the isolation resistor is a thin film resistor.

[0013] Optionally, the substrate is an aluminum oxide ceramic substrate.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The utility model power divider adopts a one-to-two structure, has three ports, and has different widths of routing, achieving wide bandwidth, miniaturization, and low insertion loss performance of the power divider. The broadband power divider has a compact structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The utility model is a schematic diagram of the printed circuit board structure of the S-Ku band broadband power divider.

[0017] Figure 2 The utility model is a schematic diagram of a shell with a printed circuit board inside of the S-Ku band broadband power divider. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0019] Example

[0020] like Figure 2 As shown, a S-Ku band broadband power divider includes a printed circuit board, wherein the printed circuit board includes a substrate 1 and a trace 2 (such as Figure 1 ), a trace 2 is connected to the substrate 1, the substrate is a broadband substrate, the substrate 1 is set as a broadband substrate, and the trace 2 is a one-to-two structure circuit. It also includes a shell 3, and the printed circuit board is fixedly installed in the shell 3. The shell is made of aluminum shell or other metal, which provides the fixing, shielding and supporting functions of the connector. Preferably, the trace 2 is welded on the substrate 1, and the trace is made of copper plated with gold. The broadband power divider has a very wide operating frequency range, specifically the k-wave adopts an operating frequency of 2-3GHz, the Ku band is 13-18GHz, and the signal line wiring form of the power divider is microstrip.

[0021] Optionally, two fixing ears 31 are respectively provided on both sides of the shell 3, and the fixing ears 31 are provided with fixing holes.

[0022] Optionally, an input line 21 is provided on one side of the one-to-two structure circuit, and a first output line 22 and a second output line 23 are provided on the other side of the one-to-two structure circuit; the input line is connected to a half-wavelength impedance transformation segment transmission line, and the first output line and the second output line are both connected to the one-to-two output segment transmission line. The signals of the first output line and the second output line are in phase and equal in amplitude, and no loss occurs.

[0023] The first output line and the second output line of the one-to-two structure circuit of this embodiment have the same width and shape, that is, the same curvature. Alternatively, the first output line and the second output line may have the same width and different shapes; that is, the first output line and the second output line may be adjusted asymmetrically according to the actual interface position; or according to different phase relationships of the user, the first output line and the second output line may be adjusted to match different phase requirements of the user.

[0024] Optionally, the first output line 22 and the second output line 23 are both curved lines, and the curved lines are provided with arc-shaped curved sections of multiple orders, and each arc-shaped curved section is connected to an isolation resistor 4 away from the input line. Preferably, the number of the arc-shaped curved sections is more than two, and the present embodiment selects eight arc-shaped curved sections.

[0025] Optionally, the curved line gradually becomes thicker from the input line to the output line, and the isolation resistors gradually become thinner from the input line to the output line.

[0026] The above power divider is a Wilkinson broadband power divider, that is, different impedance routing and isolation resistors are set in the middle, and multiple pairs of curved lines are set in the output line. Each pair of curved lines is an order. The more orders there are, the greater the working bandwidth that can be achieved. The width of each level of line is designed according to the principle of multi-level power divider. The Wilkinson power divider is selected as the Wilkinson power divider implemented by the analog method.

[0027] According to Table 1 and Table 2, the order and impedance and isolation resistance values ​​of each level are set, and the line width is calculated through impedance.

[0028] Table 1 Order setting

[0029] f2 / f1 1.5 2 2 3 4 10 Number of sections 2 2 3 3 4 7 ρ0(max) 1.036 1.106 1.029 1.105 1.1 1.206 ρ2,ρ3(max) 1.007 1.021 1.015 1.036 1.039 1.098 I(min)dB 36.6 27.3 38.7 27.9 26.8 19.4 z1 1.667 1.6398 1.7979 1.7396 1.7926 1.774 z2 1.1999 1.2197 1.4142 1.4142 1.5435 1.6597 z3 1.1124 1.1497 1.2957 1.5364 z4 1.1157 1.4142 z5 1.3017 z6 1.2051 z7 1.1274 R1 1.8643 1.9602 1.9048 2.1436 2.0633 4.9652 R2 5.3183 4.8204 3.746 4.2292 3.4524 2.5924 R3 10 8 5.8326 4.2516 R4 9.6432 6.398 R5 6.024 R6 12.3229 R7 8.8494( / )

[0030] Table 2 Recommended levels of bisection power divider

[0031]

[0032]

[0033] Optionally, the isolation resistor is a thin film resistor. A small-volume thin film resistor is used as the isolation resistor to replace a conventional chip resistor.

[0034] Optionally, the substrate is an aluminum oxide ceramic substrate. The aluminum oxide ceramic substrate reduces the volume of the broadband power divider.

[0035] The broadband power divider can be selected in appropriate size according to actual use needs. Specifically in this embodiment, the substrate size of the power divider is 19mm*8mm, and the overall size after being installed in the cavity is 26mm*12mm*6.5mm. The broadband power divider has excellent performance, and its test results are: standing wave (dimensionless parameter) 1.4, loss less than 1dB.

[0036] The structure of the utility model: Substrate selection: In order to achieve miniaturization and low insertion loss of the power divider, an aluminum oxide ceramic substrate with a high dielectric constant and a small loss tangent is selected as the substrate of the microstrip power divider. Substrate size: The number of orders and the size of each order required for this power divider are obtained by calculation, and then simulation optimization is performed using 3D simulation software. When optimizing, attention should be paid to in-band harmonics. Because the frequency band is wide, the inner cavity size is easy to introduce harmonics. During simulation, the in-band harmonics are moved to high frequencies. Under the condition of appropriate size, the farther the better. Implementation of isolation resistors: Conventional chip resistors are too large, and thin-film resistors are used as isolation resistors for each order of the power divider.

[0037] In the description of this specification, the description with reference to the terms "in one embodiment", "in another embodiment", "exemplary" or "in a specific embodiment" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0038] Although the utility model has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements can be made to the utility model. Therefore, these modifications or improvements made without departing from the spirit of the utility model are within the scope of protection claimed by the utility model.

Claims

1. A S-Ku band broadband power divider, comprising a printed circuit board, wherein the printed circuit board comprises a substrate and a wiring, characterized in that: The substrate is connected with a wiring, the substrate is a broadband substrate, and the wiring is a one-to-two structure circuit; One side of the one-to-two structure circuit is provided with an input line, and the other side of the one-to-two structure circuit is provided with a first output line and a second output line; The first output line and the second output line are both curved lines, and the curved lines are provided with arc-shaped curved sections of multiple orders, and each arc-shaped curved section is connected to an isolation resistor away from the input line; The curved line gradually becomes thicker from the input line to the output line, and the isolation resistors gradually become thinner from the input line to the output line.

2. The S-Ku band broadband power divider according to claim 1, characterized in that: It also includes a shell, in which the printed circuit board is fixedly installed.

3. The S-Ku band broadband power divider according to claim 2, characterized in that: Two fixing ears are respectively arranged on both sides of the shell, and the fixing ears are provided with fixing holes.

4. The S-Ku band broadband power divider according to claim 1, characterized in that: The input line is connected to a half-wavelength impedance transformation section transmission line, and the first output line and the second output line are both connected to a one-to-two output section transmission line.

5. The S-Ku band broadband power divider according to claim 1, characterized in that: The isolation resistor is a thin film resistor.

6. The S-Ku band broadband power divider according to claim 1, characterized in that: The substrate is an aluminum oxide ceramic substrate.

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