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Coupler circuit

A coupler and circuit technology, applied in the direction of logic circuit coupling device, 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 effect

Inactive Publication Date: 2017-04-05
天津洽克印科技发展有限公司
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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] Below in conjunction with accompanying drawing this patent is described in further detail.

[0009] combine figure 1 , this patent is an adjustable hybrid coupler circuit, including four ports (1 to 4), a broadband matching network composed of serial stub structures, a coupler composed of high-impedance transmission lines, and distributed adjustable capacitors Realization; wherein each port is connected to a broadband matching network composed of coupled serial stubs; the hybrid coupler is composed of parallel capacitors and high-impedance transmission lines; each port is connected to 50 ohm impedance.

[0010] The designed adjustable coupler can be used in the 5.8GR RFID reader transceiver, and its 3-parameter response is as follows figure 2 shown, from figure 2 It can be seen that this coupler has a wide matching bandwidth and the output result is good. The results of use show that the device has a good suppression of the channel receiver pulse and noise level, e...

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Abstract

The invention discloses a coupler circuit, which is composed of a broadband matching network, a high impedance transmission line, a coupler and a distributed adjustable capacitor. The coupler circuit can be widely applied to situations in which the signal performance is strictly required such as a mobile communication system, a radar antenna and an RFID transceiver. The out-of-band noise can be suppressed, and the stability of an electronic line can be improved. Compared with a mixed coupler circuit with other structure, adjustment of the coupler can be realized, and the coupler circuit can be applied to different bands of the communication system.

Description

technical field [0001] This patent belongs to a coupler circuit, which has important applications in mobile communication and radio frequency circuits. Background technique [0002] In recent years, a series of studies on coupler 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 coupler 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 greatly limited. This patent can effectively solve the above problems to meet the system requirements, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0175
CPCH03K19/017545
Inventor 刘同顺
Owner 天津洽克印科技发展有限公司