CN1112316A - small communication repeater - Google Patents

Abstract

The invention relates to a small communication repeater, in particular to a communication repeater which can be applied to a closed building or an area with poor receiving, and solves the problem that normal communication can not be carried out in the area.

Description

Small relay for communication

The present invention relates to a kind of small-sized communication repeater, constitute receiving loop for a kind of with several grades of fixed gain filter amplifiers, the power amplifier that contains automatic power control circuitry with several grades of fixed gain amplifiers and constitutes launching circuit, and this receiving loop and launching circuit connect independently domestic aerial respectively, and its outer end one coupling device is connected with an exterior aerial, constitute a kind of small-sized communication repeater that is applicable to that containment building uses, to solve the problem of indoor difficult reception and transmitting radio signal.

Press wireless communication apparatus now, as all kinds of telephone communication devices such as mobile phone, calling sets, really can make people all can carry out telephonic communication wherein, grasp and the trade aspect, when can be described as quite desirable necessity equipment for whereabouts, its practicality is not sayed and can be instructed, so be promptly can't carry out normal communication in the containment building or in the basement or other occasions that are difficult for wireless signal is entered, so because of stopping of building, promptly cause the communication dead angle, as giving improved necessity.

Main purpose of the present invention is: a kind of small-sized communication repeater is provided, be and a kind ofly outdoor radio signals can be transferred to indoor each position and the indoor wireless electric signal can be passed to outdoor communication receiving/transmission relay, with solve in the building can't normal communication shortcoming.

The invention provides a kind of small-sized communication repeater, comprising:

One exterior aerial;

One antenna coupler, for being connected on exterior aerial or the domestic aerial, it more has one to receive output and emission input;

One receiving loop, its input is connected with the reception output of antenna coupler, and inside is connected in series formation mutually with several grades of fixed gain filter amplifiers;

One indoor transmission antenna is connected with the output of this receiving loop;

One indoor reception antenna;

One launching circuit, its input is connected with indoor reception antenna, and the inner power amplifier of having automatic power control circuit with several grades of fixed gain filter amplifier serial connections one combines, and its output is connected in the emission input of antenna coupler;

Become one to be applicable to the inside and outside radioed small-sized communication repeater of building with above-mentioned tectonic association with what two groups of domestic aerials transmitted and received signal respectively.

Aforesaid small-sized communication repeater is characterized in that: this automatic power control circuit is for being main composition with transistor, diode and integrating circuit.

Further specify bright architectural feature of this splendid achnatherum and purpose below in conjunction with accompanying drawing.

Brief Description Of Drawings:

Fig. 1 is a calcspar of the present invention.

Fig. 2 is a detailed circuit diagram of the present invention.

As shown in Figure 1, the present invention is applicable to that the communication repeater that building uses promptly is connected with the input of a receivingloop 20 and the output of alaunching circuit 50 by two branch roads respectively through anantenna coupler 60 with an exterior aerial 10 that is installed in building appearance, and the output of this receivingloop 20 and launchingcircuit 50 and input are connected with anindoor transmission antenna 30 and anindoor reception antenna 40 respectively, and make the radio wave thatexterior aerial 10 receives can be afterantenna coupler 60 is sent into receivingloop 20 and amplified, transfer to indoor location by theindoor transmission antenna 30 that is positioned at the drawing left side again, reach outdoor radio signals are passed to indoor effect, and the indoor radio transmission electric wave that produces, then receive via aforementioned independentlyindoor transmission antenna 40, after launchingcircuit 50 carries out preposition and power amplification, deliver to exterior aerial 10 throughantenna coupler 60 again, with by exterior aerial 10 transmitting radio signals to air, to transfer to indoor emission signal outdoor, use and constitute a kind of building and use, and it carries out the communication repeater that signal transmits and receives with domestic aerial independently.

About the internal structure of thereceiving loop 20 of aforementioned communication repeater inside be with level Four fixedgain filter amplifier 21 mutually serial connection constitute, the common overall gain of forming is about 80 decibels signal amplification, launchingcircuit 50 then is connected withpower amplifier 53 compositions of automaticpower control circuitry 54 with twin-stage fixedgain filter amplifier 51 and, to carry out preposition amplification and back level amplification respectively.

And the detailed circuit of previous constructions promptly as shown in Figure 2, the drawing top promptly promptly connectsfilter 211 and two-staged transistor 212 with input with the identical fixedgain filter amplifier 21 of four set constructors, 213 amplifiers constitute the gain of every step voltage at least at 20 decibels filter amplifier, and the output that is positioned at afterbody fixedgain filter amplifier 21 promptly is connected withindoor transmission antenna 30 through a filter 22 again, the receiving loop of forming with these level Four fixedgain filter amplifiers 21 20 promptly is respectively arranged with the filtering structure because of its each inter-stage, the noise of reduction and anti-jamming capacity are arranged especially, and front end and each transistorized collector electrode at fixedgain filter amplifiers 21 at different levels are high-pass filtering circuit with inductor (L) all, for providing each inter-stage good high-frequency resistance coupling, answer the true tool practicality of sequitur this case thus.

In addition with launchingcircuit 50 aspects below Fig. 2, also be provided with two-stage fixedgain filter amplifier 51 to carry out overall gain at least 40 decibels voltage amplification to be similar to previous constructions, then input to again and carry out power amplification in thepower amplifier 53, then connect one withtransistor 541 between thesepower amplifier 53 inputs and control input end (A), the automatic power control circuit 54(APC that diode 542 and integratingcapacitor 543 constitute), these automaticpower control circuits 54 are mainly can be under no input signal state, can use and limit thispower amplifier 53 and be the no-output state, to avoid not having the meaningless power loss of generation under the signal state, to reach power saving and to reduce interference problem, thesepower amplifier 53 outputs are then sent intoantenna coupler 60 and are launched radio signals throughexterior aerial 10 through afilter 52 again, and thisantenna coupler 60 also can suitably make this launchingcircuit 50 and receivingloop 10, with the mutual interference of further reduction phase.

Claims (2)

Translated fromChinese

1、一种小型通讯中继器，其特征在于，包括：1. A small communication repeater, characterized in that it comprises:一室外天线；an outdoor antenna;一天线偶合器，为连接于室外天线或室内天线上，其还有一接收输出端及发射输入端；An antenna coupler is connected to an outdoor antenna or an indoor antenna, and it also has a receiving output terminal and a transmitting input terminal;一接收回路，其输入端与天线偶合器的接收输出端连接，内部以数级固定增益滤波放大器相互串接构成；A receiving circuit, the input end of which is connected to the receiving output end of the antenna coupler, and internally composed of several stages of fixed-gain filter amplifiers connected in series;一室内传送天线，与该接收回路的输出端连接；An indoor transmitting antenna connected to the output end of the receiving circuit;一室内接收天线；An indoor receiving antenna;一发射回路，其输入端与室内接收天线连接，内部以数级固定增益滤波放大器串接一附有自动功率控制回路的功率放大器组合而成，其输出端连接于天线偶合器的发射输入端。A transmitting circuit, the input end of which is connected to the indoor receiving antenna, is composed of several stages of fixed-gain filter amplifiers connected in series with a power amplifier with an automatic power control circuit, and its output end is connected to the transmitting input end of the antenna coupler.2、根据权利要求1所述的小型通讯中继器，其特征在于：该自动功率控制回路为以晶体管、二极管及积分电路为主要构成。2. The small communication repeater according to claim 1, wherein the automatic power control circuit is mainly composed of transistors, diodes and integrating circuits.

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