Microwave Mixer

Introduction

A microwave mixer is one of the key components in the communication system, especially in wireless communication transceivers, and also one of the key components in other microwave measurement systems. It affects and determines the bandwidth and dynamic range of the system. The basic requirements for mixers are low noise, large dynamic range, and low-frequency conversion loss. These are the difficulties in the design and research of mixer circuits. Low noise means to ensure that the transmitted signal has a good signal-to-noise ratio, so that the required signal will not be submerged by the noise generated by the circuit; The larger dynamic range is to make the signal in the wider power range have less influence on the gain and frequency of the required signal; Frequency conversion loss refers to the requirement that the output signal should not have large power loss relative to the input signal power, which is a basic requirement of an excellent circuit or system.

The mixer is composed of three parts;

(1) Input circuit coupling local oscillator signal and RF signal;

(2) Output circuit of intermediate frequency signal;

(3) Nonlinear device network.

Fundamental

The microwave mixer widely used in communication systems, especially wireless mobile communication systems, generally has three ports, that is, three-port components, generally two input ends and one output end. In general, a weak spatial signal is received at an input port of the receiver and amplified by the low-noise amplifier (LNA) module. The other input port is connected to the local oscillator LO signal provided by the local oscillator, and the output port outputs the IF frequency that needs to be processed at low frequencies.

Characteristic

The length of the microstrip line in the mixer circuit is designed based on the internal wavelength of the microstrip conductor corresponding to the signal frequency. On the one hand, because the signal frequency is close to the local oscillator frequency, the design based on the signal wavelength has little impact on the local oscillator transmission; On the other hand, because the signal power is relatively weak, the circuit design must ensure that the signal loss is minimum. The single-ended mixer circuit is lithographed on the dielectric substrate in the form of a microstrip. It is a planar circuit with a simple structure, easy manufacturing, small volume, and lightweight, but with poor performance and few practical applications.

Application

The microwave mixer is used in electronic equipment such as radar, communication, electronic reconnaissance, and microwave and millimeter-wave test instruments to realize frequency conversion functions. They are important components of microwave and millimeter-wave systems. The quality of their characteristics directly affects the performance of equipment or instruments.

Test equipment

Our microwave measurement capability makes us the best choice for the design and manufacturing of your components.

Certificate

We implement TQM (Total Quality System) and SOP (Standard Operation Procedure) with ISO 9001:2017 certification, which assures a strong commitment to quality standards and customer satisfaction.

Delivery

We will send the goods to you by DHL, FEDEX, UPS, EMS, AIR, etc. Usually 7-15 working days after receiving your 100% payment. For bulk orders: 15-35 working days after receiving the deposit.

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