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Double-frequency Wilkinson power divider

A power divider, transmission line technology

Inactive Publication Date: 2011-04-13
JESON WIRELESS
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

The power splitter is one of the key components of the communication system, but the traditional Wilkinson power splitter can only work at the specified frequency or its odd harmonics

Method used

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  • Double-frequency Wilkinson power divider
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  • Double-frequency Wilkinson power divider

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Embodiment Construction

[0014] The present invention is specifically described by taking an example of a dual-frequency Wilkinson microstrip power divider with operating frequencies of 2.0GHz and 4·2GHz.

[0015] The invention adopts a double-frequency Wilkinson microstrip power divider with working frequency of 2.0GHz and 4.2GHz, and adopts two transmission lines to realize impedance transformation. The characteristic impedances of the two transmission lines are Z1 and Z2 respectively, and the corresponding lengths are l1 and l2; the isolation resistor R is between the two output ports 2 and 3, and a section of open-circuit microstrip line is connected in parallel at the output ports, and the characteristic impedance is Z3, the length is l3. The two working frequencies are respectively f1 and f2 (f2=m f1, m is a positive real number greater than 1). An FR-4 dielectric plate with a dielectric constant of 4.4 is used, and its thickness is 1.0mm. According to the above parameters, the final physical ...

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Abstract

The invention discloses a double-frequency Wilkinson power divider. Impedance conversion is realized by using two sections of transmission lines, and the characteristic impedances of the two sections of transmission lines are respectively Z1 and Z2; an isolating resistor R is arranged between two output ports, the two output ports are respectively connected with one segment of open-circuit microstrip line in parallel, and the characteristic impedance of the open-circuit microstrip line is Z3. The isolation degree is increased by respectively connecting the two output ports with one segment of open-circuit microstrip line, and the required impedance is accurately realized by using the open-circuit microstrip lines. The invention has the advantages of small size and double-frequency operation; the required impedance is accurately realized by using the open-circuit microstrip lines, the analytical design formula of the double-frequency power divider is deducted by using odd-even mode analysis and double-frequency analysis, and the design is accurate; the power divider working in any two or more than two frequency ranges not only effectively reduces circuit size, but also reduces insertion loss and improves noise characteristics.

Description

technical field [0001] The invention relates to a power divider in microwave communication, in particular to a double-frequency Wilkinson power divider. Background technique [0002] In modern communication systems such as Global system for mobile communications (GSM) and Global Positioning System (GPS), in order to make full use of spectrum resources and improve signal transmission rates, the application of dual-frequency and multi-frequency communication circuits increasingly common. The power splitter is one of the key components of the communication system, but the traditional Wilkinson power splitter can only work at the specified frequency or its odd harmonics. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a dual-frequency Wilkinson power divider which is small in size and accurately realizes impedance by using an open-circuit microstrip line. [0004] In order to solve the above technical problems, the...

Claims

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Application Information

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IPC IPC(8): H01P5/16
Inventor 王鲁培焦晨秋韩志光张记谆
Owner JESON WIRELESS
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