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Phase shift device

A device and phase-shifting technology that can be used in impedance networks, waveguide-type devices, electrical components, etc., to solve problems such as aggravation

Active Publication Date: 2016-01-20
ALCATEL LUCENT SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While such phase shifters provide acceptable performance for low power operation, they have their deficiencies, and these deficiencies are exacerbated in typical telecommunications systems where large numbers of such phase shifters are typically required per radio frequency system

Method used

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Examples

Experimental program
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example 1

[0053] image 3 A lumped equivalent circuit 10 corresponding to a half-wavelength resonant microstrip line 20 is shown. The lumped equivalent element circuit 10 is a network of reactive discrete devices. In this example, point A illustrated on network 10 corresponds to point A illustrated on half wavelength microstrip device 20, as does point B.

[0054] Network 10 includes two inductors and three liquid crystal variable capacitors. The inductors are arranged in series between point A and point B. A first capacitor is provided relative to point A in parallel with one of the inductors. Similarly, with respect to point B, a capacitor is provided in parallel with the second inductor. A third capacitor is provided coupled to the node between the first and second inductors. These inductors have matching inductances. The first capacitor and the second capacitor have matching capacitances. The capacitance of the third capacitor is twice the capacitance of the first capacitor o...

example 2

[0059] The equivalent lumped circuit 10A is shown in Figure 4 An alternative way of obtaining a half-wavelength approximation of the microstrip line 20 is illustrated in . In this arrangement, the short length of the microstrip line is used to represent image 3 of lumped inductors.

[0060] This equivalent lumped circuit 10A can be combined with its integer multiples (ie , where n=1, 2, 3...) are used together in liquid crystal based phase shifters.

example 3

[0062] The equivalent lumped circuit 10B is shown in Figure 5 An alternative way of obtaining a half-wavelength approximation of the microstrip line 20 is illustrated in .

[0063] In this example, the equivalent lumped circuit 10B is equivalent to three times the half-wavelength microstrip line, ie ;(This is the same as image 3 The lumped equivalent circuit of 10 is similar in circuit, but with n=3).

[0064] This equivalent lumped circuit 10B can be combined with its integer multiples (ie , n=1, 2, 3...) are used together in liquid crystal based phase shifters.

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PUM

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Abstract

A phase shifting device is disclosed. The phase shifting device includes: an input operable to receive an input signal to be adjusted; a coupling device coupled to the input and the output; and at least one lumped equivalent impedance transformer circuit, the lumped equivalent impedance transformer circuit is connected to The coupling device is coupled to receive an input signal, the lumped equivalent impedance transformer circuit has a liquid crystal variable capacitor operable to adjust the input signal in response to a bias voltage applied to the liquid crystal variable capacitor and to the coupling device The conditioned input signal is provided as an output signal. Instead of using a microstrip structure, a lumped element equivalent is used instead, which makes it possible to take advantage of the advantages of the liquid crystal structure, but in a more compact form.

Description

technical field [0001] The invention relates to a phase shifting device. Background technique [0002] Signal processing devices such as phase shifting devices are known. [0003] Such a signal processing device typically receives a signal to be processed by the signal processing device and provides a signal processed by the signal processing device. Signal processing usually alters the received signal in some way to make it suitable for onward transmission. Such signal processing devices may be used in telecommunication systems and may be required to operate at high frequencies. For example, signal processing devices such as phase shifters are required to process signals operating in the gigahertz region. [0004] The selection of a phase shifter for a particular application is influenced by many factors; such as the amount of phase shift available from the device, the insertion loss caused by the device, and the power handling capabilities of the device. For lower powe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/18
CPCH01P1/18H03H9/66
Inventor S·布尔加
Owner ALCATEL LUCENT SAS