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1、TI TRF2443宽带无线IF收发方案TI公司的TRF2443是高度集成全双工宽带无线IF收发器,接收器集成了 IQ解 调器,通过模拟和数字控制的VGA可提供大于90dB的增益,可编程的基带低通滤 波器能灵活地接收不同带宽的信号,TX输出IP3为29. 5dBm, TX输出噪音为- 166dBc/Hz.TX 信号链(165-175MHz / 330-350MHz), RX 信号链(140-165MHz / 280-330MHz),主要应用在点对点微波，宽带无线接入,无线微波骨干线路和 WiMAX IF收发器.本文介绍了 TRF2443的主要特性,功能方框图，接收链路方框 图，RX和TXPLL
2、方框图，XPIC方框图，应用电路图以及TRF2443评估模块主 要特性，电路图，布局图(和所用材料清单.Integrated IF Transceiver for Broadband Wireless ApplicationsTRF2443 is a highly integrated full-duplex intermediate frequency (IF) transceiver designed for broadband point-to-point wireless communications applications. The receiver chain integrate
3、s 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 rem
4、ove 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 co
5、ntrolled 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
6、 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 Outdoo
7、r Unit (ODU), of a point-to-point microwave backhaul split-architecture system.TRF2443主要特性：Integrated TX Chain (165T75MHz / 330-350MHz)Baseband AmplifiersQuadrature ModulatorDigitally Controlled VGATX Output IP3: 29.5dBmTX Output Noise: T66dBe/HzIntegrated RX Chain (140-165MHz / 280-330MHz)IF Amplif
8、iersAnalog and Digital VGAQuadrature DemodulatorBaseband FiltersADC BuffersIF SAW Filter BypassRX Noise Figure: 4. 3dBRX Input IP3: 9.5dBmIntegrated TX and RX SynthesizersIntegrated Cross-Polarization Interference Cancellation (XPIC) SupportAuxiliary RX ChainTRF2443 应用：Wireless Microwave BackhaulPoi
9、nt-to-Point MicrowaveBroadband Wireless ApplicationsWiMAX IF TransceiverAPE4XPC jticn也IM： 881xrc eaiTEMPCXH里CMRX MRxseoTXOA一GrBrm in roTperinq 3XRCOUTF SowTXDUTp4CMMz）QAtt errTXUlXtftlO/O04（MH4）F-2M0MHZLflW1Q0KHZr*272tw LWVTC6WVtCM午fttUVFIOUIW图5. TRF2443应用电路图TRF2443 IF收发器评估模块TRF2443 Integrated IF Tr
10、ansceiver Evaluation ModuleThe 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 accu
11、rately 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评估模块主要特性：Comprehensive test capability for the TRF2443USB connection from EVM to PCSoftware support with
12、a fully featured GUI for easy testingTRF2443 on-chip EEPROM access guide图7. TRF2443评估模块电路图(2)ECHeCH电ItXAS IrtSTRUMENTS。TkXAS Instruments图9. TRF2443评估模块电路图(4)V Thxas InstrumentsII TVMOBM KM *IFOUTJ6 TXOUTJ24 RXBBQJ17J12TXBBIN TXB8IPJ7 RXINJ32 XPICINJ16XPIC8B4J25 XPIC8BOJ 28J3 J23TXLOTESTREFINTXB8QNJ
13、20 IXB8QPJ15 RXBBI侬 J31 RXLOTEST IFINXPICOUT图11.TRF2443评估模块布局图（顶层）材料清单:NOQTYPM flgSC4PCB FoepflntMft P*rt NUMMfNOU117C1C14C19C21CSS 63 U36 csi力CM 6. - -C74di,0402PANASONICEC-CEB1C1WK21a38IMUTA3RV1555C1HM1JAD10S,a第X802VUWA8Vl41C422pr0102IA-RATASRVlSWCrUlJZOT51C4seotF0402IA-RATAGRVIK5C1HK1JA31DeC3C5pF
14、0402UUUTAGRUiSSSClHSJOCID79cuaec4icM h040：PAMAJOlCeoceeiAioeug9C15C26 C33C31 C32 C34 C5D CS2 as100 ; pF0402IA-RATA3RV1SS5C1MiaAD1D91cnlow0402PAXSOMICtc-cttieia102C19C2C47pFC402FAXASOTiCEC-CEC1HIT3J113工 C24 C71100fFG4D2MLRATAGRU15S501H101J20-D1213a3C25C53C$4 C36 mew C5SC6DCSCf/TSVA TH/T 320X1XJnwn Oo
15、mpontntt142-0701.231*1jpiJUUFeZ_，x，18PVW 3_18.UswiecT3*-lOJ4?-$(SHvNT 2-M300L1L25rMS0.C4XCaiCRMT:MQWWXJLB.DIDM312L3UMnHAD_C4X8U：RA534a*CS48iXJLw324L5L6L7L6钏Hird_04Q281CRA5T34(KCS-52HXJLV0in etn0_040iPAHAJOMCONI340L13LU0ird.0402PAA3OCER-2GeCX0NlDM3S2L15 L%59nM0402CCaCRMT:MQH89HXGL264WT2MT4 WT6 vtoSTiOOFFnfgiiSjjtxtdKEYSTONE乂*371M10K0402PAHASOMICERJ-2RKTI001X详情请见：http:/focus. ti. com/lit/ds/symlink/trf2443. pdf和. ti. com/lit/ug/slwu065/slwu065.pdf