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Wilkinson power divider capable of enhancing low-frequency port isolation

A technology of port isolation and power divider, which is applied in the field of electronic information, can solve problems such as large insertion loss, unfavorable system performance, and performance that cannot meet the conditions of use, and achieve the effect of widening bandwidth and enhancing isolation

Pending Publication Date: 2022-03-01
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Resistive power dividers can achieve a wide operating frequency band. However, traditional resistive power dividers often have large insertion loss when they have a high enough isolation, which is not good for system performance.
The traditional seven-section Wilkinson power splitter is a classic passive power splitter, which has the advantages of wide operating frequency bandwidth and high port isolation. However, as the operating frequency decreases, the isolation between ports will deteriorate, so the traditional The working bandwidth of the Wilkinson power divider is difficult to cover to the lower working frequency band, resulting in the overall performance of the system not meeting the conditions of use
Therefore, when the above two combiners are applied to broadband systems, it is often difficult to meet the low-band requirements of the system.

Method used

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  • Wilkinson power divider capable of enhancing low-frequency port isolation
  • Wilkinson power divider capable of enhancing low-frequency port isolation
  • Wilkinson power divider capable of enhancing low-frequency port isolation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] see figure 1 and figure 2 A Wilkinson power divider capable of enhancing low-frequency port isolation includes a bottom layer, a middle layer and an upper layer, the bottom layer is a printed metal floor (25), the middle layer is a dielectric substrate (1), and an upper layer of microstrip lines, isolation Resistance and capacitance (2)-(24).

[0036] The printed metal floor (25) is made of thin metal copper material with a thickness of about 0.1 mm.

[0037] The dielectric substrate (1) of the intermediate layer is made of Rogers RT / duroid5880 dielectric material with a dielectric constant of 2.2, the dielectric constant εr=2.2, the thickness of the dielectric substrate is 0.762mm, the length of the dielectric substrate is 277.5mm, and the width is 120mm.

[0038] see figure 2 , the inner pin of the first SMA joint (26) is welded to the input port microstrip line (23), and the outer pin is welded to the printed metal floor (25); the second SMA joint (27) is conne...

Embodiment 2

[0045] refer to Figure 4 , the port characteristics of the Wilkinson power divider that can enhance the low-frequency port isolation are tested by a vector network analyzer (29), and the model of the vector network analyzer is Keysight E5080A. Test cable 1 (30) connects port 1 of the vector network analyzer (29) to the first SMA connector (26) of the power splitter, and test cable 2 (31) connects port 2 of the vector network analyzer to the power splitter The second SMA connector (27), this connection is used to test the transmission coefficient between the input port and output port 1 of the power divider. Test cable 1 (30) connects port 1 of the vector network analyzer (29) to the first SMA connector (26) of the power splitter, and test cable 2 (31) connects port 2 of the vector network analyzer to the power splitter The third SMA connector (28), this connection is used to test the transmission coefficient between the input port and the output port 2 of the power divider. ...

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Abstract

The invention discloses a Wilkinson power divider capable of enhancing low-frequency port isolation, which can realize a low-frequency-band coupling suppression function by replacing an isolation resistor element of a seven-section one-to-two traditional Wilkinson power divider into a capacitor-resistor series network, thereby improving the isolation between low-frequency-band ports. The isolation degree and the transmission coefficient of the Wilkinson power divider with the direct current suppression function can be visually observed through the vector network analyzer, and passive testing is achieved. Compared with a traditional Wilkinson power divider, the seven-section Wilkinson power divider has the advantages that coupling between output ports can be effectively restrained in a low-frequency band, the port isolation of the low-frequency band is improved, the low-frequency characteristic of the power divider is improved, and the proportional bandwidth of the traditional seven-section Wilkinson power divider is improved from 13: 1 to 20: 1 under the condition that the size is not increased.

Description

technical field [0001] The invention relates to the technical field of electronic information, in particular to a Wilkinson power splitter capable of enhancing low-frequency port isolation. Background technique [0002] The power divider can divide the energy of one input signal into several output energies on average or in proportion, which is of great significance in the design of communication systems and antennas, and is often used in the design of antenna array feed network. Judging whether a power splitter is qualified or not needs to consider parameters such as operating frequency, insertion loss, and port isolation. The working frequency band of the power splitter needs to cover the overall working frequency band of the system, and the isolation between the output ports of the power splitter should be kept high enough to ensure the normal working performance of the system as a whole. [0003] Resistive power dividers can achieve a wide operating frequency band. Howe...

Claims

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Application Information

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IPC IPC(8): H01P5/18
CPCH01P5/184
Inventor 吴琦王梓潼
Owner BEIHANG UNIV