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REP025: 调谐在345MHz用于无线安全系统的LNA
Internet Speaker with the DS80C400 Silicon Software
DS80C400/DS80C410/DS80C411的Keil C语言编程
Meeting the Integration Challenge in Programmable Logic Controllers
CRC Programming for the MAX14900E Octal, High-Speed Industrial Switch
Secure the IoT: Part 1, Public Key Cryptography Secures Connected Devices
Secure the IoT: Part 2, A Secure Boot, the \"Root of Trust\" for Embedded Devices
Protection: How Much is Enough for An Analog Output?
Detect a Differential Signal Even When the Inputs Are Stuck
How to Select and Design Amplifier Buffer and Passive Components to Optimize Performance for the MAX11905 Evaluation Kits
MAX11300 Product Family Featuring PIXI Technology FAQs
PMBus Protocols for Controlling and Monitoring the MAX20743/MAX20730 Switching Regulators
ECDSA-Based Authentication Redefines the Secure Sensor Card
Golf Offers Insight to Wearable IoT Technology Trends
LTE-Advanced Release-12 Shapes New eNodeB Transmitter Architecture: Part 1, Technology Evolution
LTE-Advanced Release-12 Shapes New eNode Transmitter Architecture: Part 2, Analog Integration Challenge
Choose the Right Regulator for the Right Job: Part 3, Component Selection
High-Voltage Battery Charger with Frequency Sync Input
Take the Edge Off High dV/dt Supplies
Calibration of Water Flow Rate in an Ultrasonic Flow Meter Using the MAX35101
Configuring the MAX35101 Time-to-Digital Converter as an Ultrasonic Water Meter
MAX35101, MAX35102, MAX35103 Frequently Asked Questions
Using the MAX35101 in a Heat Meter Application
ZON P5S/M5S/M5S Family Smart Meter IC User's Manual
All-Optical Switching in Transparent Networks: Challenges and New Implementations
Synchronous or Nonsynchronous Topology? Boost System Performance with the Right DC-DC Converter
PoE and LED Lighting: the Perfect Match
Industrial Internet of Things (IIoT) and Its Impact on the Design of Automation Systems
How to Linearize Wheatstone-Bridge Circuit for Better Performance
Using the MAX11254EVKIT as a Building Block Platform for Industrial Applications
Simple, Effective Method and Circuit to Measure Very-Low 1/f Voltage Reference Noise (< 1µV<sub>P-P</sub>, 0.1Hz to 10Hz)
Extending I<sup>2</sup>C Communication Distance with the DS28E17
PMBus Protocols for Controlling and Monitoring the MAX20734 Switching Regulator
40W Single Port MAX5971A Current Sensing
PIXI MAX11300 4-20mA Current Control Loop Transmitter
Let Them Drink Beer, or Try Ultrasonic Meters
Phase Shedding using VT11XX
RTD Measurement System Design Essentials
MAX2880 Application Note: Designing A 12GHz, Ultra-Low Phase Noise (0.09 ps rms jitter) Phase Locked Loop
Understanding the Operation of the Frequency Synthesizer in Maxim’s RF Transceivers
Using the MAX11311 Internal and External Temperature Sensor to Activate Motors and Fans
MAXQ<sup>&reg;</sup> to the Rescue: A Multimeter Gets a New Lease on Life
Choose the Right Voltage Regulator to Extend Battery Life in Wearables
Voltage Reference Long-Term Stability Reduces Industrial Process Control Calibration Costs
How to Accurately Calculate Overcurrent in High-Side Current-Sense Amplifiers
数字输出驱动器：理解关键特性与挑战
Design Considerations for Using the DS26504 Jitter Attenuator
Dealing with Bubbles
Addressing Core Loss in Coupled Inductors
Bipolar Work Around for the MAXREFDES74#
How to Monitor State-of-Charge in Small Batteries with Tiny, Ultra-Low-Power Comparators
Organic Land Grid Array (OLGA) and Its Applications
SMT Assembly and PCB Design Guidelines for Maxim’s Standard Wire-Bonded Quad Flatpack, No Leads (QFN) Packages
How to Collect Data from an Embedded System for Use in MATLAB
How to Design a No-Opto Flyback Converter with Secondary-Side Synchronous Rectification
Power Module Land Grid Array (LGA) Packaging and Its Applications
Ball Grid Array (BGA) Package Application Notes
Signal-to-Noise Ratio as a Quantitative Measure for Optical Biosensors
SMT Assembly and PCB Design Guidelines for Leaded Packages
How to Install the USB Driver for Evaluation Kits/Systems That Use the FTDI UART-to-USB Converter Chip (Windows Vista, Windows 7, and Windows 10 Support)
How to Use The MAX17201/MAX17211 and MAX17205/MAX17215 to Fuel-Gauge Primary Cell Batteries
Assembly Guidelines for (uSLIC) Packages
The Basics of Using the MAX11254/MAX11259 24-Bit ADCs with Integrated PGA for Sensor-Rich Applications
The Fundamentals of Secure Boot and Secure Download: How to Protect Firmware and Data within Embedded Devices
Calculating the Power Dissipation of the MAX14819 Dual-Channel IO-Link Master Transceiver
Understanding Penetration Depth vs. Wavelength for Biosensor Applications
How to Verify the DS28C36 ECDSA Certificate
How to Authenticate DS28C36 Data (User Memory/GPIO/Decrement Counter) with ECDSA
Using Secure Companion ICs to Protect a TLS Implementation
Tuning the MAX2248 for 2.4GHz Applications
How to Install MAX44211 Output Protection
Tuner Configuration for Faster Lock Time
How to Generate a DS28C36 Session Key
Paralleling Ideal Diodes: Using the MAX40200 as a Scalable Building Block
Achieving Desired Dynamic Performance in High-Speed, High-Resolution ADCs with Level Translators/Isolators in the System
Explaining Valley Current Protection for MAX20730, MAX20733, MAX20734, MAX20735, MAX20743, and MAX20745
Handling Performance Report Messages in the DS2155
Why SIMPLIS is Better Than SPICE for Power Circuits
How to Implement a 4-20mA Transmitter with the MAX12900
How to Transmit/Receive SSMs in the DS26521 and DS2155
Static and Dynamic Behavior of the MAX40200 in a Diode ORing Application
How to Add Reverse Current to the MAX15090B/MAX15090C for Hot-Swap with Integrated FET Applications
Register Configuration for DS26504
Backhaul Alternatives for 4G/5G HetNet Base Stations Part 1 - Equipment Trends and Solution Toolbox
Backhaul Alternatives for 4G/5G HetNet Base Stations Part 2 – PTP Microwave and Broadband Satellite Systems
Using Reflectometry for a PPG Waveform
How Common Noise and Error Sources Affect Optical Biosensing
Op Amps and the Importance of Low Quiescent Current
The Basics of Thermocouples
How to Interface the MAX11301WING PIXI 20-Port, Mixed-Signal I/O with the MAX32630FTHR
How to Interface the MAX30003WING ECG AFE with the MAX32630FTHR
Using Maxim ADCs to Measure the Current on the MAX40016
How to Achieve Greater Accuracy in Battery Capacity Readings for Portable Designs
Current Sensing Devices Used in Battery Management of Portable Applications
关于线性稳压器的五个设计细节
How to Optimize Performance When Using Synchronous Rectification in Nonisolated DC-DC Converters
How to Optimize Use of Control Algorithms in Switching Regulators
How to Use GMSL Line-Fault Detection for Power Over Coax
Highly Efficient Power-Management Architectures for Aftermarket Transportation Electronics
How to Configure the MAX2769C ADC Registers for DSP Interface Mode
How to Design an Automotive TFT Display System
FAQ: The MAX22190 Octal Industrial Digital Input Device with Diagnostics
Guidelines to Programming the MAX14001/MAX14002 Configurable, Isolated ADCs
Choosing an Accurate Battery Management System for Automotive Designs
Frequently Asked Questions (FAQs) About the MAX22191 Parasitically Powered, Industrial Digital Input
Effects of Different Resistor Tolerances in a Differential ADC for THD Performance
How to Build a High-Resolution Temperature Monitoring System
Frequently Asked Questions about the MAX22505 ±40V USB Protector
How to Measure the Power Supply Rejection Ratio for the MAX38902A/MAX38902B
How to Measure the MAX6079 Voltage Reference Thermal Hysteresis, Considerations for PCB Layout
Advantages of Switching Regulators Over Linear Regulation
Addressing Power Supply Challenges for After-Market Electronics and Infrastructure
Mitigating EMI for a CISPR 22-Compliant Power Solution
Fundamental Advantages of the MAXQ1061/MAXQ1062 Compared to Chips Based on the TPM 2.0 Standard
Choose a Fuel Gauge with the Right Current Sensing for Your Battery System
Guidelines to Implement CRC Algorithm for the MAX22190 and MAX22192 Octal Industrial Digital Input with Diagnostics
MAX32664 User Guide
Choose a Tailored SIMO PMIC for your Portable Design
How to Select the Right Front-End Buck Converter for Your Automotive ECU
Why Now is a Good Time to Secure Your Embedded Systems with SHA-3
Add Digital Adjustment to Continuous-Time Filters
Applying and Using the DS1620 in Temperature Control Applications
Micropower Circuit Monitors Positive Supply Current
Ultra High Speed Microcontroller Hardware Enhances Serial Port Capability
Accelerating 16/32-Bit Math Operations with the DS80C390/DS80C400
GPS接收机射频芯片
Implementing a Serial Port FIFO Using Dual Data Pointers
Fast Memory Transfers with the Ultra High-Speed Flash Microcontroller
Data Pointer Decrement Feature Simplifies Copy Operation for Overlapping Memory Buffers
Configuring Keil PK51 Tools to Support 24-Bit Contiguous Addressing Mode
HFAN-03.0.0: Accurately Estimating Optical Receiver Sensitivity
Micropower Circuit Offers Automatic Shutdown and Low-Battery Lockout
Replacing an Atmel TS80C51U2 with a DS80C320/323 Microcontroller
REP025: 调谐在345MHz用于无线安全系统的LNA
Simple Circuit Charges Lead-Acid Batteries
Class D Audio Amplifier Output Filter Optimization
MAX3800: Equalizing Gigabit Copper Cable Links with the MAX3800
Achieving high accuracy using MAX1298/MAX1299 temperature sensors
Digitally Adjustable Voltage&nbsp;References
HFAN-08.0.1: Understanding Bonding Coordinates and Physical Die Size
Circuit Enables PCs to Communicate via IrDA
Bench Characterization of ADCs Using a Low-Cost PC-Based Data-Acquisition Board
QuickChip Design Example 1 - A Silicon Bipolar Broadband PLL Building Block Integrated Circuit
Reverse-Current Circuitry Protection
Tech Tips: Getting the Most from Your Sensor and Conditioning Electronics
Maxim Leads the Way in ESD Protection
A Single Chip Silicon Bipolar Receiver for GPS/GLONASS Applications
以1Gsps高速捕捉信号的ADC
<I>QuickChip Design Example 2</I><BR>Low Power Silicon BJT LNA for 1.9GHz
Semicustom QuickChip ASICs Implement RF Functions to 9GHz
利用比较器/DAC组合解决数据采集问题
ESD Protection for I/O Ports
Synchronous Rectification Aids Low-Voltage Power Supplies
Circuit Tradeoffs Minimize Noise in Battery-Input Power Supplies
New RS-232 ICs Feature 1&micro;A Supply Current, &plusmn;15kV ESD Protection, and 3V Operation
Supervisor ICs Monitor Battery-Powered Equipment
单电源运算放大器的设计考虑
Simple Circuit Disconnects Load
Power Conservation in 3V/5V Dual-Supply Systems
Proper Handling Helps Make the Most of Li-Ion Batteries
Feedback Isolation Augments Power-Supply Safety and Performance
Flyback Converter Serves Battery-Powered CCD Applications
Versatile ICs Enable Chemistry-Independent Battery Charging
Managing Noise in Cell-Phone Handsets
Charge Pumps Shine in Portable Designs
5V至1.8V转换器，无需电感
Push-Pull Driver Provides Isolated 5V at 1A
便携式CPU内核的供电问题
New Developments in Battery Chargers
Turnkey Power-Supply Solutions Power Pentium&reg; Pro &micro;Ps
Intelligent IC Conditions Pressure-Sensor Signals
Distributed Temperature Sensing Improves Reliability
免调节中频VCO: 第二部分: 新型IC简化设计
IC Temperature Sensors Find the Hot Spots
New IC Caps Two Decades of UART Development
Temperature Sensor ICs Simplify Designs
New ICs Revolutionize The Sensor Interface
SiGe技术提高无线前端性能
采用硅双极型IC简化VCO设计
Pre-emphasis Improves RS-485 Communications
Concerned About GNSS Inaccuracy? Expand Your Constellations
How ChipDNA<sup>™</sup> Physically Unclonable Function Technology Protects Embedded Systems
Using the MAX14871EVKIT with Software
PoE Power Injector
Looking for an Electrical Prepayment System in Your Home? Near-Field Communications and a Secure Authenticator
How to Fuel Gauge Lithium-Ion Batteries Without Battery Characterization with ModelGauge m5 EZ
Switching Inductive Loads with Safe Demagnetization
How to Improve Game Phone Performance with the MAX28200
How to Connect System Protection ICs for Higher Current Application
How to Perform Real-Time Power Measurements with a Power Accumulator
How to Measure Body Temperature Using the Health Sensor Platform
Designing Efficient Power Systems for E-Bikes
How to Get Longer Battery Life for Wearables with a SIMO Power Converter Architecture
Time for a New Class of Flexible Automotive LED Drivers
How a SIMO PMIC Enhances Power Efficiency for Wearable IoT Designs
Accurate Fuel Gauging Without Battery Characterization Using ModelGauge m5 EZ Algorithm
Using an NFC System to Wirelessly Power and Access a 1-Wire Network
How to Choose a Power Path Selector
Guidelines to Enhancing the Heart-Rate Monitoring Performance of Biosensing Wearables
Guidelines for the MAX34407/MAX34417 Hardware Design and Support Notes for the Windows 10 Driver for System Designers
Considerations for Fuel Gauging Lithium-Iron-Phosphate Batteries
Guidelines for the Opto-Mechanical Integration of Heart-Rate Monitors in Wearable Earbud Devices
Guidelines for SpO2 Measurement Using the Maxim<sup>®</sup> MAX32664 Sensor Hub
How Overcurrent Protection Works in the MAX77812
MAX1730x/MAX1731x Software Implementation Guide
How to Multiplex a 1-Wire Master into Numerous Channels
How to Design an LED Backlight Driving System using the MAX20446
Guidelines for the MAX77812 User-Selectable Phase Configurations and How to Select Them
Precision Thermocouple Temperature Measurement using The MAX11410 ADC
How to Configure the Optimal Settings for the Best PPG and ECG Performance in the MAX86150
Maxim Integrated’s JIBEPOS Current Measurement
MAX32550 Current Measurement Breakdown of Peripherals
New Memories Breaking the Gamma Barrier for Medical Consumables
Linearizing Microwave Transmission Power Amplifiers Using the SC1894
Optimizing your Power Amplifier for Predistortion with RF PA Linearizer (RFPAL)
不是加密专家也可实现安全认证
Solar FAQs
Beat the Heat: Build a Compact, Multi-Standard Dual USB Charger
How to Set Up a Secure Applications Boot with the MAXQ1061
Transducer Compensation for Ultrasonic Flow Meters
Guidelines to Implement CRC Programming for the MAX14915 Octal, Industrial, High-Side Switch
Optimize Cost, Size, and Performance with MAX98357 WLP
How to Address Reference Long-Term Drift Performance
Wirelessly Powering and Accessing a 1-Wire Network
How to Use LEDs with Supervisory ICs for Undervoltage and Overvoltage Fault Indicators
How to Protect IoT Devices Using a Software Isolation Solution
How to Shrink Your Power Solution Using Smart, Wide-Bandwidth Internal Compensation
How to Use Packet-Error Checking to Secure Your Temperature Reading
Factory-Programmable Parameters of the MAX77812
How to use Multi-Function GPIs?
Generating a Higher Output Voltage than 1.525V Using the MAX77812
How to Program Startup and Shutdown Sequence with MAX77812
How to Design and Layout an EMI-Optimized PCB for the MAXM22511 Isolated RS-485 Transceiver Module
Guidelines for the Opto-Mechanical Integration of Heart-Rate Monitors in Wearable Wrist Devices
How to Calculate ENOB for ADC Dynamic Performance Measurement
Addressing the Challenges of High-Voltage Automotive Power Applications
Make Your ADAS High-Resolution Remote Camera Design Smaller and Flexible
Secure Authentication for Medical Disposables
How Less Can Be More in Motor Control Design
Generating Greater System Efficiency for Single- to Multi-Cell Battery-Powered Designs
Why Functional Safety is Important for Automotive Displays
Bring Your High Current Sensors to the IO-Link Revolution
Simplifying Mobile USB-C Designs
How to Shrink Your USB Type-C Battery Charger
A Customizable ECG Monitor You Can Call Your Own
Take a Weight Off Your Chest with a Wrist-Worn ECG Monitor
How to Measure Biopotential ECG Using a Chest Strap
How Protection ICs Maintain System Uptime
How to Select a TVS Diode for Maxim&#x27;s IO-Link Devices
How to Load Application Files to Maxim’s Arm Cortex-M4 Microcontrollers
Building a Public Key Infrastructure with Cryptographic Controller

关键词: lna, rf, rfic, 安全, 无线, rf ic, 低噪声放大器
関連製品

应用笔记 620

REP025: 调谐在345MHz用于无线安全系统的LNA


摘要 : MAX2640的典型工作频率范围是400MHz至2500MHz。使用附加的匹配电路，它可以工作在345MHz，此时的增益约为17dB，噪声系数(NF)为1.4dB。用ADS对设计进行模拟，网络分析仪的观察结果证实了其工作性能。文中还给出了标准的S参数、电路原理图以及材料清单。

快速工程原型(rapid engineering prototypes)是Maxim应用工程师在实验室里建立并进行产品测试的实际电路。它们是新的射频工程设计的起点。

更多信息： 目标：调谐MAX2640使其工作在345MHz，用于无线安全系统的信号发射。
目标：调谐MAX2640使其工作在345MHz，用于无线安全系统的信号发射。

MAX2640的典型工作频率范围是400MHz到2500MHz，但是增加了Lnew和Cnew后可以使其工作在345MHz，此时拥有接近17dB的增益和1.4dB的噪声系数(NF)。将最初ZM1上边的输入导线切掉给电路板加入一个Lnew (大约43nH)，Lnew和18pF的输入并联电容Cnew一起构成了LNA所需的输入匹配。匹配线ZM1也要移动一下。用模拟设计系统(ADS)进行仿真并通过网络分析仪得到新的匹配响应。

MAX2640是为蜂窝、PCS、GPS和2.4GHz ISM频段的应用设计的低成本超低噪声放大器。它使用+2.7V至+5.5V电源供电，消耗电流仅3.5mA并且具有低噪声系数、高增益和高三阶输入截取点(IP3)。MAX2640在900MHz典型的性能参数为：15.1dB的增益、-10dBm的输入IP3和0.9dB的噪声系数。

Schematic of MAX2640 Tuned for 345MHz Performance
Bill of Materials of Tuned MAX2640
S-Parameter Measurements Plot1, S-Parameter Measurements Plot2
ADS Simulation Schematic
ADS Simulation Data