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Adjustable hybrid coupler circuit

A hybrid coupler and circuit technology, applied in the direction of logic circuit connection/interface layout, etc., can solve the problems of limited applicability, small bandwidth, and poor versatility, and achieve high stability, simple structure, and compact structure.

Inactive Publication Date: 2015-06-10
徐园园
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its design structure can only be used in a specific frequency band, and the bandwidth is small, which makes the system larger and less versatile
At the same time, due to the problem of its circuit structure, the traditional coupler circuit is extremely sensitive to temperature, and its applicability is greatly limited.

Method used

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Embodiment Construction

[0008] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0009] combine figure 1 , the present invention is an adjustable hybrid coupler circuit, including four ports (1~4), four inductors ~ , four adjustable capacitors ; where the upper inductance The two ends of the inductor are respectively connected to port 1 and port 2; the lower inductance The two ends of the inductor are respectively connected to port 3 and port 4; the left inductor The two ends of the inductor are respectively connected to port 1 and port 3; the right inductance The two ends of the capacitors are respectively connected to port 2 and port 4; one end of the four adjustable capacitors is respectively connected to the four ports 1~4, and the other end is connected to the ground; ports 1~4 are all connected to 50 ohm impedance.

[0010] When inductance The parameters are fixed, and the capacitance value is When adjustable, the c...

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PUM

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Abstract

The invention discloses an adjustable hybrid coupler circuit. The adjustable hybrid coupler circuit is composed of four electric inductors and four adjustable capacitors, and can be widely used in places of a WCDMA (wideband code division multiple access) mobile communication system, a radar antenna, an RFID (radio frequency identification) transceiver and the like, where signal performance is strictly required. The adjustable hybrid coupler circuit can suppress out-of-band noise and improve stability of an electronic circuit. Simultaneously, compared with coupler circuits of other structures, the adjustable hybrid coupler circuit can achieve adjustability of a coupler, and can be used in different frequency bands of a communication system.

Description

technical field [0001] The invention relates to a coupler, in particular to a chaotic coupler circuit, which belongs to the field of communication and electronic applications, and especially has important applications in filtering and matching networks. Background technique [0002] In recent years, a series of researches on filter circuits have been carried out at home and abroad. A lot of research results have been obtained, especially in mobile communication technology, used in the front end of the power amplifier and the feeding part of the radar antenna, the filter circuit can effectively solve the problem of large noise outside the passband of the system. However, its design structure can only be used in a specific frequency band, and the bandwidth is small, which makes the system larger and less versatile. At the same time, due to the problem of its circuit structure, the traditional coupler circuit is extremely sensitive to temperature, and its applicability is grea...

Claims

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Application Information

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IPC IPC(8): H03K19/0175
Inventor 徐园园
Owner 徐园园