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Integral Ku band high balance degree multi-channel receiver

A multi-channel, balanced technology, applied in transmission systems, electrical components, etc., can solve the problems of difficulty in connecting semiconductor devices, low image frequency interference suppression, and increased difficulty in research and development, to achieve excellent reception effects and ultra-small The effect of volume, good amplitude, and phase balance

Inactive Publication Date: 2007-12-12
NANJING UNIV OF SCI & TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In the development of the mixer, the power mixing circuit uses a 3dB mixing ring with unequal loads. The two output ports of this structure are not located on one side, which brings certain difficulties to the connection of semiconductor devices and increases the difficulty of development. , in order to suppress the image frequency interference, a low-pass filter is made, and the image frequency interference suppression degree is not high
Most of the current multi-channel receivers use single-channel receivers to simply build together to form multi-channel reception, which has a large volume and weight and affects reliability.

Method used

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  • Integral Ku band high balance degree multi-channel receiver
  • Integral Ku band high balance degree multi-channel receiver

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Embodiment Construction

[0011] The three-channel Ku-band receiver will be further described below in conjunction with the accompanying drawings.

[0012] Combined with Figure 1, connect the Ku-band three-channel receiver unit PIN tube switch, low-noise amplifier, image rejection mixer and quadrature phase shifter as shown in the figure, and the local oscillator signal is divided into three channels through the power divider. The local oscillator power is evenly distributed to the three receive channels. The dielectric board used in the circuit is 5880 dielectric board from Rogers Company, with a dielectric constant of 2.2.

[0013] receive signal f S First, the signal is gated or turned off through the PIN tube switch; the gated signal is amplified with low noise through the low noise amplifier; then enters the image rejection mixer; the local oscillator signal f p The equalized local oscillator signal is connected to the mixer of each channel through the power divider, and the received signal f S...

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Abstract

A multi-channel receiver is featured as forming parallel multi-channel receiving signal input by PIN tube switch circuit , low noise amplifier and mixer ; connecting orthogonal phase shifter circuit to mixer on each channel , realizing signal gating or closing of receiving signal by PIN tube switch circuit , sending gated signal and halved oscillator signal to mixer through low noise amplifier and power divider separately to generate intermediate frequency by bottom frequency conversion , outputting it to intermediate frequency phase shifting circuit for realizing intermediate frequency phase shift .

Description

a technical field [0001] The invention relates to a microwave component that can be widely used in the fields of radar, communication, wireless access network, telemetry, tracking reception, etc., in particular to an integrated Ku-band high-balance multi-channel receiver. Two background technology [0002] The Ku-band multi-channel receiver is the key component of the receiving channel of communication and radar systems, and the existing Ku-band receivers are generally single-channel. For example, the document "Low-noise Microwave Receiver in Ku-band", Communication Technology and Development, 1990 (1), p57-60 reported a single-channel low-noise microwave receiver used in Ku-band satellite TV live broadcast and communication systems. Its low-noise amplifier uses a two-stage FET with a noise figure of 3dB and a gain of 19dB. In the development of the mixer, the power mixing circuit uses a 3dB mixing ring with unequal loads. The two output ports of this structure are not loca...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/16H04B1/10
Inventor 恽小华孙琳琳楚然
Owner NANJING UNIV OF SCI & TECH