Radio Frequency Technology-Mobile phone portable-82-EEWORLD

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Micron will appear at the 2024 CIIE, continue to deepen its presence in the Chinese market and lead sustainable development

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[Radio Frequency Technology]RF amplifiers with Zero Distortion™ technology provide better performance than RF semiconductors such as GaAs technology.
[Radio Frequency Technology]Technological innovation promotes RF miniaturization and integration Zuolan Microelectronics debuts at ELEXCON 2022
[Radio Frequency Technology]iPhone 14 Pro gold version renderings exposed: the most recognizable iPhone

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3G mobile phone RF front-end integration: At present, the penetration rate of 3G mobile phone terminals is still low, but from the perspective of future trends, driven by factors such as the reduction of 3G tariffs, the development of mobile Internet and smart phones, the scale of the 3G mobile phone market will show a rapid growth trend. According to data from research company iSuppli, China's 3G mobile phone shipments will reach 42.97 million in 2010......; Keywords： 3G RF Integration
Publish Time：2011-04-01

Key technologies and features of EV-DO version B: Key technologies of EV-DO version B The key technologies of EV-DO version B are improved and strengthened from the technologies of version A. The key technologies include multi-carrier bundling, adaptive load balancing, high-order modulation and feedback multiplexing. Multi-carrier bundling is to bundle multiple version A carriers together through software upgrades, so that the same data......; Keywords： EV-DO
Publish Time：2011-03-11

Several Difficulties and Solutions in Mobile Phone RF Design: 1. Solutions to the RF interference problem of mobile phones Regarding the RF interference problem of GSM mobile phones, Liu Junyong pointed out that GSM mobile phones use TDMA working mode, and RF transmission and reception are not performed at the same time. The basic principle of reducing RF interference is to strengthen matching and isolation. When designing, it is necessary to take into account that the transmitter is in high power......; Publish Time：2011-02-17

Basic knowledge of mobile phone RF design: 1. What is RF? Answer: RF stands for Radio frequency, which mainly includes wireless transceivers. 2. What are the frequencies of mobile phones in the world today (CDMA, GSM, local telephone communication, PHS, analog mobile phones, etc.)? Answer: EGSM RX: 925-960MHz, TX:880-915MHz; CDMA cell ......; Publish Time：2011-02-17

Application of Low Noise Amplifier in Mobile Phone GPS: As early as after the 9/11 terrorist incident in 2001, the United States, for security reasons, required mobile phones to have GPS positioning functions to determine the real-time location of the phone. In recent years, with the rapid development of my country's infrastructure, road construction has changed with each passing day; people's work and life pace has accelerated, and GPS navigation and positioning systems have become increasingly important and demand has increased. Recently......; Keywords： Low Noise Amplifier FBAR Filter GPS Shiqiang Telecom
Publish Time：2011-02-15

Brief Analysis of GSM/TD-SCDMA Dual-mode Terminal Chip Design: 　　1 Introduction As China's third-generation mobile communication standard with independent intellectual property rights, TD-SCDMA will be built and commercialized on a large scale. And for a long time, TD-SCDMA and GSM networks will coexist. Therefore, it is necessary to adopt TD-SCDMA/GSM (hereinafter referred to as TD/GSM) dual-mode terminals, which will bring great convenience to users and also......; Keywords： GSM TD-SCDMA dual-mode terminal chip design
Publish Time：2010-02-06

RF7115 Transmitter Module Promotes Mobile Phone System Design Integration: 　　As more and more new mobile phones with rich functions begin to integrate megapixel digital cameras, Bluetooth technology and multimedia functions, in order to enable more designers to quickly complete the design and development of these increasingly complex new mobile terminals, component solution suppliers are struggling to meet some inherent contradictions in design......; Keywords： RF7115 transmitter module mobile phone system design and integration
Publish Time：2010-01-14

Single-chip A-GPS solution solves mobile phone navigation problems: 　　The inspiration for location services comes from the PMB2520 single-chip Assisted Global Positioning System (A-GPS) solution called "Hammerhead", jointly developed by Infineon and its US partner Global Locate. A-GPS positioning refers to the use of the global satellite positioning system, ......; Keywords： Single chip A-GPS mobile navigation
Publish Time：2010-01-14

Large-scale RF integration can reduce mobile phone circuit board area and power consumption: 　　In today's wireless devices, more than half of the components on the circuit board are analog RF devices. Therefore, an effective way to reduce the area and power consumption of the circuit board is to carry out larger-scale RF integration and develop towards system-level chips. This article introduces the current status of RF integration development and proposes coping methods and solutions to some of the problems......; Keywords： RF integration mobile phone circuit board area power consumption
Publish Time：2009-12-13

New low capacitance EMI filter brings stronger anti-interference performance to mobile phones: 　　As the video resolution of LCD and camera in mobile phones increases, the frequency of data operation will exceed 40MHz. For the suppression of wireless EMI and ESD, traditional filter solutions have reached their technical limits. To adapt to the increase in data rate without interrupting the video signal, designers can choose the new low capacitance, high filter discussed in this article......; Keywords： EMI filter mobile phone anti-interference
Publish Time：2009-11-29

The impact of adjacent channel suppression/interference on 802.11 WLAN: 　　With the rapid promotion and application of wireless networking technology and other wireless technologies in the same spectrum without license restrictions, Wi-Fi (802.11) products are increasingly exposed to radio frequency (RF) interference, which seriously affects the data throughput performance of wireless local area networks (WLANs). At the same time, the demand for multimedia audio and video, streaming......; Keywords： WLAN 802.11 channel suppression interference
Publish Time：2009-11-20

Multi-standard/multi-band reception via direct conversion receiver: 　　Mobile cellular operators have been eager to deploy a common wireless infrastructure that can be field-programmable to provide a variety of mobile services. Ultimately, the wireless infrastructure deployed in areas with high cellular traffic requires dynamic flexibility to enable the RF hardware to adapt to changing signal conditions......; Keywords： Direct conversion dynamic range multi-standard multi-band
Publish Time：2009-09-30

Application of open-loop and closed-loop MIMO in BTS systems: Multiple Input Multiple Output (MIMO) is one of the technologies that is expected to achieve the high data rates required by wireless data systems in the future. Multiple data streams can be transmitted through MIMO, thereby increasing the throughput of the system. Currently, most 3G and 4G wireless standards such as WiMAX, TD-SCDMA and LTE have adopted MIMO. Transmission......; Keywords： BTS open loop closed loop MIMO
Publish Time：2009-09-18

RF Power Measurement Methods for Portable Systems (Part 2): Measuring Low Level RF Signals with a High Dynamic Range Detector For applications that require measuring very low level RF signals, a high dynamic range detector with increased sensitivity is necessary. This type of function is often used in interfaces that measure RSSI to provide AGC (Automatic Gain Control) feedback control......; Keywords： RF power measurement detector measurement signal level
Publish Time：2009-09-08

RF Power Measurement Methods for Portable Systems (Part 1): Designing low power circuits while achieving acceptable performance is a difficult task. Doing so at RF frequencies increases dramatically in challenge. Today, nearly everything has wireless connectivity, so RF power measurements are quickly becoming a necessity. This article highlights several methods for accurately measuring R ......; Keywords： RF power measurement measurement signal level CW waveform measurement
Publish Time：2009-09-08

Signal Integrity Analysis: Wireless Signals (Part 3) Scanning Spectrum Analyzer: Chapter 10 of Signal Integrity - The Engineer's Companion discusses new techniques for wireless signal measurements and potentially radical signal analysis in modern wireless environments. Part 2 covers frequency measurements. The traditional architecture of the swept, superheterodyne spectrum analyzer is......; Keywords： signal integrity wireless signals swept spectrum analyzers
Publish Time：2009-09-08

Signal Integrity Analysis: Wireless Signals (Part 2) Frequency Measurement: Chapter 10 of Signal Integrity - The Engineer's Companion discusses new techniques for wireless signal measurements and potentially radical signal analysis in modern wireless environments. Part 2 covers frequency measurements. Frequency measurements are typically made with a swept spectrum analyzer, which uses a spectrum analyzer to measure the frequency of a signal over a certain resolution band....; Keywords： Signal integrity wireless signals frequency measurements
Publish Time：2009-09-08

Signal Integrity Analysis: Wireless Signals (I) Wireless/RF Signals: Chapter 10 of the book Signal Integrity? - The Engineer's Companion discusses new techniques for wireless signal measurements and potentially radical signal analysis in modern wireless environments. This article is a partial excerpt from that article. Wireless Signal Chain Wireless signals are a must-have in many of today's embedded systems......; Keywords： Signal integrity signal analysis wireless signal testing
Publish Time：2009-09-08

Performance Comparison of Integrated RF Mixers and Passive Mixer Solutions: Abstract: This application note compares the overall performance of integrated RF mixers and passive mixer solutions, discusses the key features of both solutions, and points out the main advantages of integrated solutions over passive solutions. In the past, RF developers have achieved good results using passive down-conversion mixers in high-performance receiver designs......; Keywords： RF mixer passive mixer receiver
Publish Time：2009-09-08

Using real data to test GPS receivers: Historically, GPS receiver designers have simulated and driven the receiver performance in complex environments. Although GPS signal simulation can provide a repeatable signal source, the simulator cannot reproduce the complex multipath signal distortion commonly seen in reality. In addition, drive testing also includes......; Keywords： GPS receiver test RF vector signal analyzer simulation test drive test
Publish Time：2009-07-15

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