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Dual Bandpass Responsive Lumped Element Power Divider with -/+45° Phase Shift

A dual-frequency bandpass and lumped element technology is applied in the field of microwave technology research to achieve the effects of reducing difficulty, large effective working bandwidth, and good port impedance matching performance

Active Publication Date: 2021-10-26
SHANGHAI TECH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The classic transmission line Wilkinson power divider can only work at the specified operating frequency or its odd harmonics
And the classic lumped element Wilkinson power divider can only work in a single frequency band

Method used

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  • Dual Bandpass Responsive Lumped Element Power Divider with -/+45° Phase Shift
  • Dual Bandpass Responsive Lumped Element Power Divider with -/+45° Phase Shift
  • Dual Bandpass Responsive Lumped Element Power Divider with -/+45° Phase Shift

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Embodiment 1

[0045] A basic structural form disclosed in this embodiment is as figure 2 As shown, in the lumped element power divider proposed in this embodiment, the phase difference between signal input port 1 and output port 2 or output port 3 is ±45° (-45° for low frequency band and 45° for high frequency band). The two output ports 2 and 3 adopt a symmetrical structure, have equal amplitude and phase, and are isolated from each other. The structure of the power divider circuit consists of an inductance L connected in parallel from the input port 1 to ground 2 and capacitance C 2 , The inductance L connected in series from input port 1 to output port 2 and output port 3 respectively 1 and capacitance C 1 , and the isolation resistor R between the two output ports 2 and 3 and the inductance L connected in parallel with it 3 , capacitance C 3 composition.

[0046] like figure 2 The component parameter values ​​of the structure shown are calculated by the following equations (1) ...

Embodiment 2

[0056] Another basic structural form disclosed in this embodiment is as image 3 As shown, the difference between it and Embodiment 1 is: the isolation resistor R and the parallel inductor L 3 , capacitance C 3 between them in parallel. like image 3 Component parameter values ​​of the structure shown, L 1 、C 1 , L 2 、C 2 and figure 2 exactly the same, while L 3 、C 3 , the parameter value of R can be calculated by the following formula (8) to formula (10):

[0057] L 3 = L 2 (8)

[0058] C 3 =C 2 (9)

[0059] R=Z s (10)

[0060] Other structures and working principles of this embodiment are the same as those of Embodiment 1.

[0061] The power splitter designed according to the formula disclosed in Embodiment 1 or the formula disclosed in Embodiment 2 has perfect power distribution, impedance matching and isolation characteristics between output ports at the center operating frequency. And the farther away from the center frequency, the performance of th...

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Abstract

The invention relates to a dual-frequency band-pass response lumped element power divider with - / +45° phase shift and a design method thereof. The three ports of the power divider provided by the present invention all have good port impedance matching, and the output port 2 and port 3 have equal amplitude and phase and are isolated from each other. The phase difference between the output port and the input port of the power splitter at the center operating frequency of the low frequency band is -45°, and the phase difference between the output port and the input port of the power splitter at the center operating frequency of the high frequency band is 45°, This is significantly different from the classic dual-frequency Wilkinson power splitter (±90°). Further, the circuit invention only needs 4 capacitors, 4 inductors and an isolation resistor, a total of 9 components. The circuit invention also has unique advantages such as wider working bandwidth.

Description

technical field [0001] The present invention relates to a lumped element circuit topology and design method of a miniaturized dual-frequency power splitter / combiner, especially the new power splitter with a band-pass frequency response and at the center frequency of its two operating frequency bands The phase shifts are -45° and +45°, respectively. The invention belongs to the field of microwave technology research. Background technique [0002] The power divider / combiner is one of the basic components of a microwave circuit. It has the function of decomposing the input signal power into several isolated signals with equal or unequal power, or conversely combining several signals into one. Therefore, power splitters are widely used in circuits and systems such as power amplification and synthesis, signal testing, and quadrature mixing and demodulation. There are many forms of power splitters, such as couplers (including branch lines, microstrip hybrid rings, parallel lines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P5/16
CPCH01P5/16
Inventor 杨瑾屏
Owner SHANGHAI TECH UNIV
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