【技术】解析对讲机使用频段范围规定及常用频点

时间： 2022-04-29 来源：优译

技术问答

选型帮助

研发客服

商务客服

根据电磁波理论，频率越低，波长越长，电波穿透建筑物的能力越弱，但绕射能力越强；频率越高，波长越短，电波穿透建筑物能力越强，但绕射能力越弱。本文中优译将为大家解析对讲机使用频段范围规定及常用频点。

对讲机使用频段范围规定

专业对讲机

V段民用移动通讯业务：136~174MHz
U段：

武警，公安合司法移动通讯业务：335.4~399.9MHz；
民用移动通讯业务：400~470MHz；

其它频段划分：

海岸用：220MHz；
业余用：433MHz；
集群用：800MHz；
手机：900MHz/1800MHz；

公众对讲机

公众对讲机（民用对讲机）：409~409.990MHz，功率低于0.5W。

公众对讲机的技术规范：

工作频率（单位：MHz）:

409.7500 ; 409.7625 ; 409.7750 ; 409.7875 ; 409.8000 ; 409.8125 ; 409.8250 ; 409.8375 ; 409.8500 ; 409.8625 ; 409.8750 ; 409.8875 ; 409.9000 ; 409.9125 ; 409.9250 ; 409.9375 ; 409.9500 ; 409.9625 ; 409.9750 ; 409.9875 （共20个频点）。

调制方式：F3E
有效发射功率（EIRP ）：<0.5W
发射频率容限：<+5ppm
发射机杂散辐射：<50uW
接收机杂散辐射：<20nW
信道间隔：12.50kHz公众对讲机应便于操作，用户可在上述规定的频道范围内人工选取一个频道进行单对单通信或小组对讲通信。各制造商研制、生产的公众对讲机不允许设置编程操作功能，防止用户随意扩展频率范围，修改发射参数。研制、生产、进口、销售和使用公众对讲机须经信息产业部无线电管理局型号核准。

对讲机频段的选择

对于专业对讲机来说，在城市使用是因为楼房密集度高，需要电波穿透力强，所以应该选用U段（400~470MHz）比较适合；而在旷野或海面这种空旷的地域使用对讲机，则需要绕射能力强的电波，所以选用V段（136~174MHz）比较合适。

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本文由carat转载自优译，原文标题为:对讲机使用频段范围规定及常用的频点介绍，本站所有转载文章系出于传递更多信息之目的，且明确注明来源，不希望被转载的媒体或个人可与我们联系，我们将立即进行删除处理。

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UIYWC6880A54T59	波导环行器	5.4 ~ 5.9 GHz	0.3	23	1.2	100	100	WR137(BJ70)	-40 ~ +85

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产品型号

品类

Operating Frequency(MHz、GHz)

Power Output CW (W)

Power Gain @CW(dB)

Input Power(dBm)

Gain Flatness Type(dB)

Input VSWR

Odd Harmonics @CW Type(dBc)

Even Harmonics @CW Type(dBc)

Noise Figure(dB)

Spurious Signals Type(dBc)

Input SMA Female, Output SMA Female

选型表 - 优译立即选型

优译携射频隔离器等产品参加2024欧洲微波展

2024年9月24日至27日，在巴黎凡尔赛门，优译与您相约2024欧洲微波展。将展示我们的主要产品：射频隔离器/射频环行器/射频滤波器，衰减器/终端，功分器，双工器/三工器，TX RX 合路/分路系统，电桥/同频合路器，定向耦合器，波导同轴转换。

厂牌及品类发布时间 : 2024-07-27

优译隔离器选型表

优译宽带隔离器、波导隔离器、同轴隔离器、微带隔离器、微带基片隔离器、射频隔离器、嵌入式带线隔离器、表面封装隔离器(SMT隔离器)、双节隔离器，提供多种频率范围，VSWR：1.15-1.45，VSWR Max：1.15-1.9，Forward Power(W)：2-1500W，Reverse Power(W)：1-300W，低插损、高隔离、高功率；可按客户要求定制.

产品型号	品类	VSWR	Isolation Min(dB)	Freq. Range(MHz、GHz)	Temp.(°C)	Connector Type	Insertion Loss Max(dB)	Forward Power(W)	Reverse Power(W)
UIYCDI16080A25T30SF	双节隔离器	1.45	24	25 ~ 30 MHz	+10 ~ +60	SMA-F	7	50	50