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Modulator

A technology of modulator and optical receiver, which is applied in the direction of modulated carrier system, digital transmission system, electrical components, etc., and can solve the problems of high price, high cost, and large power consumption

Inactive Publication Date: 2016-09-21
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, components such as mixers and frequency converters are expensive, costly, and consume large power

Method used

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Embodiment Construction

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0035] In order to solve the problems existing in the prior art, an embodiment of the present invention discloses a modulator, and the present invention will be described in detail below through specific embodiments.

[0036] figure 1 A schematic structural diagram of a modulator provided by an embodiment of the present invention may include: a first radio frequency switch 101 , a second radio frequency switch 102 , and a microwave six-port 103 .

[0037] Wherein,...

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Abstract

The embodiment of the present invention discloses a modulator, including: a first radio frequency switch, a second radio frequency switch and six microwave ports, wherein the first radio frequency switch is used to receive the I signal in the baseband signal, and control the first radio frequency switch On and off, change the first reflection coefficient of the local oscillator signal; the second radio frequency switch, used to receive the Q signal in the baseband signal, control the on and off of the second radio frequency switch, and change the second reflection coefficient of the local oscillator signal; microwave six ports , used to modulate the local oscillator signal. It can be seen that the direct up-conversion of baseband signals can be realized by using six microwave ports in this solution, impedance control can be realized by using radio frequency switches, and signal modulation with high carrier frequency and high bandwidth can be realized. The combination of six microwave ports and radio frequency switches can realize the function of modulator , because the microwave six-port and radio frequency switch are cheap, and the microwave six-port is completely passive and consumes little power, so the cost of the components used for signal modulation is reduced and the power consumption of modulation is reduced.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a modulator. Background technique [0002] In radio communication, electromagnetic waves are used as the carrier of information. The information is generally a baseband signal, which is characterized by a lower frequency, a wider frequency band, and overlapping. In order to be suitable for single channel transmission, modulation is necessary. The so-called modulation is the process of loading the baseband signal onto the high-frequency oscillation signal. Under normal circumstances, the baseband signal at this time is also called the signal to be modulated. Its essence is to move the baseband signal to the high-frequency carrier, that is, the spectrum The process of moving. Therefore, the purpose of signal modulation is to transform the analog signal or digital signal to be transmitted into a high-frequency signal suitable for channel transmission. [0003] At ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L27/00
CPCH04L27/00
Inventor 李建强宋骁雄樊宇婷尹飞飞戴一堂徐坤
Owner BEIJING UNIV OF POSTS & TELECOMM
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