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Two-way amplifier of portable phone system

A two-way amplifier, telephone system technology, applied in the direction of two-way amplifier, radio relay system, radio/induction link selection arrangement, etc., can solve problems such as low reception noise figure, and achieve the effect of improving isolation

Inactive Publication Date: 2006-09-13
胡军
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The isolation of radio frequency time-division switches is generally only 30 decibels. Therefore, how to make a bidirectional amplifier system based on time-division duplexing not only ensure high isolation between uplink and downlink, but also have a very low receiving noise figure. Bottleneck problem

Method used

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  • Two-way amplifier of portable phone system
  • Two-way amplifier of portable phone system
  • Two-way amplifier of portable phone system

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Embodiment

[0030] see figure 1 , the bidirectional amplifier of the handheld telephone system is composed of a detection control circuit, a downlink power amplifier circuit, an uplink low noise receiving circuit and three time-division switches, wherein the detection control circuit is used to couple and detect the downlink signal of the base station entering the bidirectional amplifier from the J port, and Form the control level to control the guidance of the three time-division switches and the on-off of the downlink power amplifier circuit and the uplink low-noise receiving circuit, so that the working state of the bidirectional amplifier is synchronized with the base station; the downlink power amplifier circuit is used to amplify the input from the J port The downlink signal of the base station, the circuit is turned on in the downlink working time slot of the base station, and turned off in the uplink working time slot of the base station; the uplink low-noise receiving circuit is u...

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Abstract

This invention relates to a dual-way amplifier of a new handheld phone system, which can either solve the problem of high isolation of up and down lines or can let the indoor covered receiving noise factor of the system less than 3dB and the down high power amplified three-stage mutual adjustment target to -48dBc characterizing in including a test control circuit unit, a down power amplified circuit unit, an up low noise receiving circuit unit and three time division switches.

Description

technical field [0001] The present invention relates to a bidirectional amplifier for a novel hand-held telephone system. Background technique [0002] Compared with mobile communication networks such as GSM and CDMA, my country's handheld telephone system based on PHS wireless access technology has the characteristics of low call cost, great potential for data service development, high positioning accuracy and small mobile phone radiation, which makes my country's handheld telephone The system has great potential for development. However, my country's hand-held telephone system uses the 1.9GHz microwave frequency band as its carrier frequency band, and its penetration ability is poor. In addition, the network coverage is mainly based on low-power (10mW) base stations, so the hand-held telephone system network can cover the signals in buildings. Very poor, such as luxury hotels, commercial centers, large apartments, subways, basements, underground garages, etc. With the rapi...

Claims

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Application Information

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IPC IPC(8): H04B7/14H04Q7/30H03F3/62
Inventor 胡军刘文清都基焱崔浩李静
Owner 胡军
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