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
View PDF0 Cites 5 Cited by
  • Summary
  • 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

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Two-way amplifier of portable phone system
  • Two-way amplifier of portable phone system
  • Two-way amplifier of portable phone system

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04B7/14H04Q7/30H03F3/62
Inventor 胡军刘文清都基焱崔浩李静
Owner 胡军
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap