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TI TRF2443寬帶無線IF收發(fā)方案

2010-01-05 21:01:48 本站原創(chuàng)

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TI 公司的TRF2443是高度集成全雙工寬帶無線IF收發(fā)器,接收器集成了IQ解調(diào)器,通過模擬和數(shù)字控制的VGA可提供大于90dB的增益,可編程的基帶低通濾波器能靈活地接收不同帶寬的信號,TX輸出IP3為29.5dBm,TX輸出噪音為-166dBc/Hz.TX信號鏈(165-175MHz / 330-350MHz),RX信號鏈(140-165MHz / 280-330MHz),主要應(yīng)用在點對點微波,寬帶無線接入,無線微波骨干線路和WiMAX IF收發(fā)器.本文介紹了TRF2443的主要特性,功能方框圖, 接收鏈路方框圖, RX和TX PLL方框圖, XPIC方框圖, 應(yīng)用電路圖以及TRF2443評估模塊主要特性,電路圖, 布局圖(和所用材料清單.

Integrated IF Transceiver for Broadband Wireless Applications

TRF2443 is a highly integrated full-duplex intermediate frequency (IF) transceiver designed for broadband point-to-point wireless communications applications. The receiver chain integrates a quadrature (IQ) demodulator and provides more than 90 dB of gain range, obtained via a combination of analog and digital controlled VGAs. The integrated programmable baseband low-pass filter gives the TRF2443 the flexibility to receive signals with different bandwidths, while also helping to remove interferer signals before they reach the ADC. Additionally, the TRF2443 gives the flexibility to add an external IF filter to further remove unwanted signals. The TRF2443 transmitter chain integrates a quadrature (IQ) modulator driving a highly linear IF DVGA that provides 35 dB of gain range controlled via a serial programming interface (SPI). The TRF2443 includes the two synthesizers for the receiver and transmitter chains, removing the need for external LO generation circuitry and simplifying the implementation of a frequency-division duplexing (FDD) transceiver design. The TRF2443 also provides Cross-Polarization Interference Cancellation (XPIC) support via an integrated XPIC output amplifier and receiver chain. The TRF2443 is an ideal building block for implementing the IF transceiver function in the Indoor Unit (IDU), which is connected via coaxial cable interface to the Outdoor Unit (ODU), of a point-to-point microwave backhaul split-architecture system.

TRF2443主要特性:

Integrated TX Chain (165-175MHz / 330-350MHz)

Baseband Amplifiers

Quadrature Modulator

Digitally Controlled VGA

TX Output IP3: 29.5dBm

TX Output Noise: -166dBc/Hz

Integrated RX Chain (140-165MHz / 280-330MHz)

IF Amplifiers

Analog and Digital VGA

Quadrature Demodulator

Baseband Filters

ADC Buffers

IF SAW Filter Bypass

RX Noise Figure: 4.3dB

RX Input IP3: 9.5dBm

Integrated TX and RX Synthesizers

Integrated Cross-Polarization Interference Cancellation (XPIC) Support

Auxiliary RX Chain

TRF2443應(yīng)用:

Wireless Microwave Backhaul

Point-to-Point Microwave

Broadband Wireless Applications

WiMAX IF Transceiver

圖1.TRF2443功能方框圖

圖2.TRF2443接收鏈路方框圖

圖3.TRF2443 RX和TX PLL方框圖

圖4.TRF2443 XPIC方框圖

圖5.TRF2443應(yīng)用電路圖

TRF2443 IF收發(fā)器評估模塊

TRF2443 Integrated IF Transceiver Evaluation Module

The TRF2443EVM is the evaluation board for the TRF2443 integrated IF transceiver for broadband wireless applications. The TRF2443EVM includes instructions for equipment setup procedures, software GUI configurations, and test procedures that allow a user to quickly and accurately measure the TRF2443 performance characteristics.The TRF2443EVM can be used to select options for trimming the device configuration in order to meet various application requirements.

TRF2443 評估模塊主要特性:

Comprehensive test capability for the TRF2443

USB connection from EVM to PC

Software support with a fully featured GUI for easy testing

TRF2443 on-chip EEPROM access guide