CN114497954B - High-isolation power divider chip and system - Google Patents
High-isolation power divider chip and system Download PDFInfo
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- CN114497954B CN114497954B CN202210078384.3A CN202210078384A CN114497954B CN 114497954 B CN114497954 B CN 114497954B CN 202210078384 A CN202210078384 A CN 202210078384A CN 114497954 B CN114497954 B CN 114497954B
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- 238000002955 isolation Methods 0.000 title claims abstract description 64
- 239000003990 capacitor Substances 0.000 claims abstract description 93
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Abstract
An embodiment of the invention discloses a high-isolation power divider chip and a system, wherein the power divider comprises: the first end of the first capacitor is grounded, the second end of the first capacitor is connected with one end of the second capacitor, the first end of the second capacitor is connected with an input port, the second end of the second capacitor is grounded, the first end of the third capacitor is grounded, the second end of the third capacitor is connected with the first end of the isolation unit, the first end of the fourth capacitor is connected with the second end of the isolation unit, the second end of the fourth capacitor is grounded, the first end of the first inductor is connected with the second end of the first capacitor, the second end of the second inductor is connected with the first end of the third capacitor, the second end of the second inductor is connected with the first end of the fourth capacitor, the first end of the isolation unit is connected with the third end of the isolation unit, the second end of the isolation unit is connected with the fourth end of the isolation unit, and the second end of the isolation unit is connected with the second microwave signal output port.
Description
Technical Field
The invention relates to the field of monolithic microwave integrated circuits. And more particularly to a high isolation power divider chip and system.
Background
The power divider (abbreviated as power divider) refers to a device capable of dividing one input signal into two identical or different output signals or multiple output signals, and can realize the division/combination of multiple electromagnetic signals, is an indispensable functional unit in a radio frequency circuit, and besides the two commonly used power dividers, other power dividers with different dividing numbers are often needed in an antenna array feed network and a power synthesis circuit, such as three-way power dividers. In the occasion that the requirement on the power capacity is not high, the microstrip line three-way power divider has the advantages of light weight, low cost, simple structure and the like, and is widely applied to the fields of mobile communication, aerospace, radar detection and the like.
According to different circuits, the power divider can be divided into a simple T-shaped power divider and an isolation power divider. The output ends of the simple T-shaped power divider have no isolation resistance, so that good power distribution ratio can be realized under a larger broadband, but the isolation degree is poor. Isolation resistors are arranged between the output ends of the isolation power divider, so that the isolation power divider has higher isolation degree, but the standing wave characteristic of the isolation power divider needs to be improved.
Disclosure of Invention
In view of this, a first embodiment of the present invention provides a high isolation power divider chip, including:
a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor and an isolation unit,
The first end of the first capacitor is grounded, the second end of the first capacitor is connected with one end of the second capacitor,
The first end of the second capacitor is connected with the input port, the second end is grounded,
The first end of the third capacitor is grounded, the second end of the third capacitor is connected with the first end of the isolation unit,
The first end of the fourth capacitor is connected with the second end of the isolation unit, the second end is grounded,
The first end of the first inductor is connected with the second end of the first capacitor, the second end is connected with the second end of the third capacitor,
The first end of the second inductor is connected with the first end of the third capacitor, the second end of the second inductor is connected with the first end of the fourth capacitor,
The first end and the third end of the isolation unit are connected with the first microwave signal output port, and the second end and the fourth end are connected with the second microwave signal output port.
In a specific embodiment, the isolation unit comprises a first isolation circuit and a second isolation circuit,
The first and second isolation circuits are connected in parallel such that a resonance point is introduced between the first and second microwave output ports.
In a specific embodiment, the first isolation circuit includes a fifth capacitor, a first resistor, and a sixth capacitor, wherein,
The first end of the fifth capacitor is connected with the first end of the third capacitor, the second end of the fifth capacitor is connected with the first end of the sixth capacitor through the first resistor,
The second end of the sixth capacitor is connected with the first end of the fourth capacitor.
In a specific embodiment, the second isolation circuit includes a second resistor, a seventh capacitor, and a third resistor, wherein,
The first end of the second resistor is connected with the first end of the fifth capacitor and connected with the first microwave output port, the second end of the second resistor is connected with the first end of the seventh capacitor,
The first end of the third resistor is connected with the second end of the seventh capacitor, and the second end of the third resistor is connected with the second end of the sixth capacitor and is connected with the second microwave output port.
In a specific embodiment, the input port, the first microwave output port and the second microwave output port are all microstrip transmission lines with 50 ohms.
A second embodiment of the present invention is a high isolation power division system, comprising:
the power divider chip of the first embodiment,
And the microwave signal generator is used for providing microwave signals for the power divider chip.
The beneficial effects of the invention are as follows:
The invention provides a high-isolation power divider chip and a system, which achieve the aim of improving the isolation of output ports by introducing resonance points between a first microwave output port and a second microwave output port, and have the advantages of larger improvement of electrical performance, obviously improved isolation between the output ports and low input/output standing wave ratio; and the chip size is greatly reduced by adopting a lumped parameter layout mode.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 shows a schematic diagram of a power divider according to one embodiment of the present invention;
Fig. 2 shows a schematic diagram of a power division system according to an embodiment of the invention.
Detailed Description
In order to make the technical scheme and advantages of the present invention more apparent, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.
The power divider is a very important microwave passive device in a wireless communication system, and has wide application in antenna array feed systems, power amplifiers and wireless local area networks. The basic function of the device is to divide the energy of one signal input into two paths or multiple paths to output equal or unequal energy, and each path is generally provided with attenuation of several dB, different signal frequencies, different distributors and different attenuation.
In order to provide a power divider with high isolation, small insertion loss and good standing wave, as shown in fig. 1, an embodiment of the present invention provides a high isolation power divider chip, including:
a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a first inductor L1, a second inductor L2 and an isolation unit M1,
The first end of the first capacitor C1 is grounded, the second end is connected with one end of the second capacitor C2,
The first end of the second capacitor C2 is connected with the input port, the second end is grounded,
The first end of the third capacitor C3 is grounded, the second end is connected with the first end of the isolation unit M1,
The first end of the fourth capacitor C4 is connected to the second end of the isolation unit M1, the second end is grounded,
A first end of the first inductor L1 is connected with a second end of the first capacitor C1, a second end of the first inductor L1 is connected with a second end of the third capacitor C3,
The first end of the second inductor L2 is connected to the first end of the third capacitor C3, the second end is connected to the first end of the fourth capacitor C4,
The first end and the third end of the isolation unit M1 are connected with the first microwave signal output port, and the second end and the fourth end are connected with the second microwave signal output port.
In one embodiment, the isolation unit includes a first isolation circuit M10 and a second isolation circuit M12,
The first isolation circuit and the second isolation circuit are connected in parallel, so that a resonance point is introduced between the first microwave output port and the second microwave output port, and the aim of improving the isolation degree of the output ports is fulfilled.
More specifically, the first isolation circuit includes a fifth capacitor C5, a first resistor R1, and a sixth capacitor C6, wherein,
The first end of the fifth capacitor C5 is connected with the first end of the third capacitor C3, the second end is connected with the first end of the sixth capacitor C6 through the first resistor R1,
The second end of the sixth capacitor C6 is connected to the first end of the fourth capacitor C4.
The second isolation circuit comprises a second resistor R2, a seventh capacitor C7 and a third resistor R3, wherein,
The first end of the second resistor R2 is connected with the first end of the fifth capacitor C5 and connected with the first microwave output port, the second end is connected with the first end of the seventh capacitor C7,
The first end of the third resistor R3 is connected with the second end of the seventh capacitor C7, and the second end of the third resistor R3 is connected with the second end of the sixth capacitor C6 and is connected with the second microwave output port.
In a specific embodiment, the input port, the first microwave output port and the second microwave output port are all microstrip transmission lines with 50 ohms.
In addition, it will be appreciated by those skilled in the art that the object of the present invention can be achieved by introducing resonance points by changing the circuit structure between the output ports in the above-described embodiments, thereby improving the isolation between the output ports.
Compared with the existing power divider, the power divider chip provided by the embodiment has the advantages that the electrical performance is improved greatly, the isolation between output ports is improved remarkably, and the input/output standing wave ratio is low; and the chip size is greatly reduced by adopting a lumped parameter layout mode.
Corresponding to the power divider provided in the above embodiment, as shown in fig. 2, an embodiment of the present invention further provides a power dividing system, including: the power divider chip and the microwave signal generator described in the above embodiments are configured to provide a microwave signal to the power divider chip.
Since the power dividing system provided by the embodiment of the present application corresponds to the power divider provided by the above-mentioned several embodiments, the foregoing embodiment is also applicable to the power dividing system provided by the present embodiment, and will not be described in detail in the present embodiment.
It should be understood that the foregoing examples of the present invention are provided merely for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention, and that various other changes and modifications may be made therein by one skilled in the art without departing from the spirit and scope of the present invention as defined by the appended claims.
Claims (3)
1. A high isolation power divider chip, comprising:
a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a first inductor, a second inductor and an isolation unit,
The first end of the first capacitor is grounded, the second end of the first capacitor is connected with one end of the second capacitor,
The first end of the second capacitor is connected with the input port, the second end is grounded,
The first end of the third capacitor is grounded, the second end of the third capacitor is connected with the first end of the isolation unit,
The first end of the fourth capacitor is connected with the second end of the isolation unit, the second end is grounded,
The first end of the first inductor is connected with the second end of the first capacitor, the second end is connected with the second end of the third capacitor,
The first end of the second inductor is connected with the first end of the second capacitor, the second end of the second inductor is connected with the first end of the fourth capacitor,
The first end and the third end of the isolation unit are connected with the first microwave signal output port, and the second end and the fourth end of the isolation unit are connected with the second microwave signal output port;
The isolation unit comprises a first isolation circuit and a second isolation circuit,
The first isolation circuit and the second isolation circuit are connected in parallel, so that a resonance point is introduced between the first microwave output port and the second microwave output port to isolate the first microwave output port and the second microwave output port;
The first isolation circuit includes a fifth capacitor, a first resistor, and a sixth capacitor, wherein,
The first end of the fifth capacitor is connected with the first end of the third capacitor, the second end of the fifth capacitor is connected with the first end of the sixth capacitor through the first resistor,
The second end of the sixth capacitor is connected with the first end of the fourth capacitor;
the second isolation circuit comprises a second resistor, a seventh capacitor and a third resistor, wherein,
The first end of the second resistor is connected with the first end of the fifth capacitor and connected with the first microwave output port, the second end of the second resistor is connected with the first end of the seventh capacitor,
The first end of the third resistor is connected with the second end of the seventh capacitor, and the second end of the third resistor is connected with the second end of the sixth capacitor and is connected with the second microwave output port.
2. The power divider chip of claim 1, wherein the input port, the first microwave output port, and the second microwave output port are all 50 ohm microstrip transmission lines.
3. A high isolation power division system, comprising:
The power divider chip of any one of claim 1-2,
And the microwave signal generator is used for providing microwave signals for the power divider chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210078384.3A CN114497954B (en) | 2022-01-24 | High-isolation power divider chip and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210078384.3A CN114497954B (en) | 2022-01-24 | High-isolation power divider chip and system |
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| Publication Number | Publication Date |
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| CN114497954A CN114497954A (en) | 2022-05-13 |
| CN114497954B true CN114497954B (en) | 2024-07-12 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078736A (en) * | 2013-03-26 | 2014-10-01 | 中国科学院微电子研究所 | Miniaturized wideband power splitter circuit |
| CN207925646U (en) * | 2018-02-09 | 2018-09-28 | 成都海微特科技有限公司 | A kind of miniature ultra wide band power splitter |
| CN113097679A (en) * | 2021-03-10 | 2021-07-09 | 西安电子科技大学 | Small Wilkinson power divider used in MMIC circuit |
| CN214900816U (en) * | 2021-04-28 | 2021-11-26 | 深圳振华富电子有限公司 | Power divider circuit, power divider and electronic equipment based on thin film IPD technology |
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104078736A (en) * | 2013-03-26 | 2014-10-01 | 中国科学院微电子研究所 | Miniaturized wideband power splitter circuit |
| CN207925646U (en) * | 2018-02-09 | 2018-09-28 | 成都海微特科技有限公司 | A kind of miniature ultra wide band power splitter |
| CN113097679A (en) * | 2021-03-10 | 2021-07-09 | 西安电子科技大学 | Small Wilkinson power divider used in MMIC circuit |
| CN214900816U (en) * | 2021-04-28 | 2021-11-26 | 深圳振华富电子有限公司 | Power divider circuit, power divider and electronic equipment based on thin film IPD technology |
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