At present some basic structures such as superheterodyne zero-IF low-IF image-rejection are often used in receiver designing . The digital IF receiver is also being applied to the designing gradually .

目前常见的接收机前端结构有 超 外差、零中频、低中频、镜像抑制等基本结构，数字中频接收机也开始逐步得到应用。

The form of superheterodyne receiver is used and a reasonable conversion gain distribution is designed .

接收机采用了 超 外差的方式，合理地设计了 各次变频增益的 指标分配。

Phase-locking techniques and superheterodyne receiver structures are discussed . And the phase-locked sources in transmitters the local oscillators and the IF modules in receivers are analyzed and designed . 3 .

对锁相技术和 超 外差接收机结构进行了讨论，并对 3mm系统中的锁相源进行了设计，它们被用于发射机的信号源和接收机本振中。

This paper discussed the double sideband noise figures and single side band noise figures of the superheterodyne receivers in a ideal hypothesis and the practical case respectively . It also gave some considerations designing the single side band receiver .

分别讨论了在理想假设和实际情况下 超 外差接收机的双边带噪声系数和单边带噪声系数，给出了单边带接收机的某些设计方案。

The high-intermediate-frequency superheterodyne structure with dual-conversion is used in the receiver to realize the wideband receiving .

为实现宽带工作，接收机采用了 超 外差结构中的二次变频方案进行设计，第一中频为高中频。

These RF units based on superheterodyne structure are composed of low noise amplifier mixer frequency synthesizer and AGC etc.

该射频单元 直接 决定了 整个抗干扰模块的 动态 范围和信噪比，它基于 传统 的 超 外差 拓扑结构，由低噪声放大器、混频器、频率合成器以及自动增益放大器等单元组成。

The high-intermediate-frequency superheterodyne structure is adopted in the final scheme . The fine sensitivity of the receiver is achieved by two cascaded LNA in the front of the system .

系统采用 超 外差 式 变频结构设计，两级低噪声放大单元级联保证了接收机灵敏度，两级增益控制单元实现了所要求的接收机动态范围，并且整机的线性度也得到了保证。

Edwin Armstrong develops a receiving circuit - the superheterodyne .

艾德温？阿姆斯特朗开发接收机电路& 超 外差 式 收音机。

According to the technical indicators issues and taking into account the requirements of existing devices the system uses double-conversion of the superheterodyne architecture .

根据课题的技术指标的要求并考虑到现有器件水平，系统采用了 超 外差二次变频的体系结构。

At present many radio frequency transceiver structures are proposed in domestic & foreign area like superheterodyne transceiver zero-intermediate frequency transceiver low-intermediate frequency transceiver and so on .

目前国内外提出了许多射频前端收发机结构，如 超 外差 式收发机、零中频收发机、低中频收发机等。

Dual-conversion superheterodyne receiver The Design of the Self-Balance Two Wheel Vehicle 's Attitude Estimation System

双变频 超 外差 式接收机单轴双轮自平衡车姿态检测方案设计

It is a misconception to think many stages in the superheterodyne chain are a plus it is not .

这是一个误解认为在 超 外差 式 需要 多次 变频，其实不是。

Application of superheterodyne FM reception in measurement of blade tip clearance

超 外差调频接收技术在叶尖间隙测量中的应用

The fundamental designing indices and block diagram of a wideband superheterodyne receiver for the 230-300 MHz solar radio acousto-optic spectro-graph have been proposed .

本文提出了用于230一300MHz太阳声光射电频谱仪的宽频带超 外差 式接收机的基本设计指标和方框图。

Low-Power FSK Superheterodyne Receiver Based

低功耗FSK 超 外差 式接收电路设计

Finally it points out that as far as wide open receiver is concerned to suppress or reduce the spurious response is one of the most important tasks in designing a superheterodyne receiver .

最后指出对于宽开接收机而言，抑制或减少虚假响应是设计超 外差接收机的重要任务之一。

For the former through combining the superheterodyne method and the quadrature mixing frequency method the wideband reception and mirror frequency suppression can be implemented by Secondary frequency conversion technology .

对于前者，主要 阐述如何将 超 外差技术和正交混频结合起来，利用二次变频实现宽带接收和镜频抑制；对于后者，主要 介绍带 通 采样 定理和基于多相 均匀滤波器组的数字信道化方法。

In this paper there describes four common receiver structure of the current system and finally choose superheterodyne receiver system by analysing the advantages and disadvantages and System Requirements . At the same time the key indicator of the receiver has been analyzed .

文中详细介绍了四种当前常用的接收机结构体系，经过优缺点比较以及系统需求最终选择 超 外差接收机结构体系，同时对接收机的关键指标进行了分析。

Using superheterodyne second frequency conversion this module receiver design is composed of LNA tuned filter mixer IF amplifier circuit and AGC control circuit to implement large dynamic range receive technical criteria .

本模块接收机设计采用 超 外差二次变频，主要由低噪声放大器、调谐滤波器、混频器、中放电路和AGC控制电路等几部分组成，实现了大动态范围接收技术指标。

Based on the discussion of the topological structure of a superheterodyne FM receiver a one chip FM receiver for FSK ( Frequency Shift Keying ) signal has been designed .

在分析 超 外差FM中频接收拓扑结构的基础上，设计出一种用于FSK（移频键控）信号的单片FM中频接收电路系统。

In this paper a superheterodyne receiver is taken as an example to illustrate the characteristic and effect of virtual experiment teaching .

并以 超 外差接收机的工作原理为例，说明了虚拟实验教学的特点和作用。

Non-thermal millimeter radiation from the plasma in the HL-1 device has been investigated at two fixed frequencies ( 80GHz and 35 GHz ) by means of two superheterodyne receivers which are set up in a direction vertical to the major radius .

0和（？）5GHz）的毫米波段 外差接收机研究了在HL-1装置中等离子体的非热辐射。

Then the superheterodyne receiver was selected as the system architecture in the thesis by comparing the advantages and disadvantages among the receiver structures . Secondly low noise amplifier was analyzed and designed .

通过比较这几种接收机结构的优缺点，选择 超 外差 式接收机作为 射频前端接收体系。其次，对低噪声放大器进行了分析与设计。

High performance superheterodyne receiver

高性能 超 外差 式接收机

And the superheterodyne scheme was carried out network research and application .

并针对 超 外差方案进行了组网的研究与应用。

This paper first discusses the instinct disadvantage of a superheterodyne receiver which is that it has more spurious response .

本文首先指出了 超 外差接收机的固有缺点，即它有更多的虚假响应。

Noise Figures of the Superheterodyne Receivers

超 外差接收机的噪声系数