參數(shù)資料
型號(hào): MC13214R2
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: SPECIALTY MICROPROCESSOR CIRCUIT, BGA71
封裝: 9 X 9 MM, 1 MM HEIGHT, ROHS COMPLIANT, LGA-71
文件頁(yè)數(shù): 17/70頁(yè)
文件大?。?/td> 802K
代理商: MC13214R2
MC13211/212/213/214 Technical Data, Rev. 0.0,
24
Freescale Semiconductor
3. Figure 14C shows a dual antenna configuration where there is a RX antenna and a TX antenna. For
the receive side, the RX antenna is ac-coupled to the differential RFIN inputs and these capacitors
along with inductor L1 form a matching network. Inductors L2 and L3 are ac-coupled to ground to
form a frequency trap. For the transmit side, the TX antenna is connected to the differential PAO
outputs, and inductors L4 and L5 provide dc-biasing to VDDA but are ac isolated.
Figure 14. Using the MC1321x with External RF Components
Balun
Bypass
RFIN_P (PAO_P)
RFIN_M (PAO_M)
CT_Bias
PAO_P
PAO_M
MC1321x
L1
Ba lun
Byp a s s
RF IN_ P (PAO _ P )
R F IN _ M (PAO _ M )
CT_ B ia s
(A nt S w C tl)
PA O _ P
PAO _ M
M C 13 21x
LNA
Ant
Sw
Ba lun
VD D
V DDA
Byp a s s
L1
14A) Using Onboard T/R Switch
14B) Using External Antenna Switch With LNA
RFIN_P (PAO_P)
RFIN_M (PAO_M)
CT_Bias
PAO_P
PAO_M
MC1321x
VDDA
TX Antenna
Bypass
L1
L2
L3
L4
L5
RX Antenna
14C) Using Dual Antennae
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