COMPUTER ENGR ECE 594BB
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This 5 page Class Notes was uploaded by Spencer Ondricka on Thursday October 22, 2015. The Class Notes belongs to ECE 594BB at University of California Santa Barbara taught by Staff in Fall. Since its upload, it has received 67 views. For similar materials see /class/227063/ece-594bb-university-of-california-santa-barbara in ELECTRICAL AND COMPUTER ENGINEERING at University of California Santa Barbara.
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Date Created: 10/22/15
Synthesizer Block Diagram Lock Detector 8MHz a I Ref Clock PFD CP LF LORF to RX 32 1 1617 Channel Decoder Q Q Select LOIF to RX and TX LORF to RX and TX Synthesizer El Single synthesizer with 1GHz sliding IF LOIF El Divideby four generates quadrature LOIF with excel lent IIQ matching El PlNwejunction varactor El Frequency plan RF Carrier 5160 5340 GHz 10 MHz spacing LORF 4128 4272 GHz 8 MHz spacing LOIF 1032 1068 GHz 2 MHz spacing UUUUU Dual Conversion with Sliding IF FA dc 1G Baseband LOIF LO frequencies different from carrier frequency 0 L0 leakage and L0 pulling by PA is suppressed No external IF filter channel select at baseband with LPF Single synthesizer with 1GHz sliding lF L0 LORF 4 Excellent IIQ LOIF for good transmit image rejection TX Imagereject mixers at both LOIF and LORF to avoid IF filter RX 0 5GHz LNA suppresses the 3GHz image by gt 20 dB 0 No imagereject mixer needed RF mixer output image at 9 GHz A A 3G 4G 5G 39 Hz Image LORF Carrier 5GHz Signal 5GHz Transceiver AK O V Transmitter Txn x x O Synthesizer Rxout o Receiver Dual Transmit Conversion XMA A Am dc 1G 3G 4G 5G Baseband LOIF Image LORF Carrier El L0 frequencies different from carrier frequency 0 L0 leakage and L0 pulling by PA is suppressed El Synthesizer running at LORF 0 Excellent IIQ LOIF for good transmit image rejection El Double imagereject mixers 0 Avoid lF filtering of sideband